/* ============================================== */
/* == Improved Sepia E-Paper Theme Stylesheet == */
/* ============================================== */

/* reset.css */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* === Enhanced Sepia Color Palette === */
    --epaper-background: #f2ece2;
    --surface-color: #fff9ef;
    --border-color-base: rgba(101, 82, 66, 0.15);
    --border-color-accent: #b8956b;

    /* --- Text Colors --- */
    --text-color-primary: #4c2a00;
    --text-color-secondary: #4a3620;
    --text-color-tertiary: rgba(45, 36, 25, 0.85);

    /* --- Accent & Interactive Colors --- */
    --accent-color: #b3804b;
    --accent-color-light: #c69a6b;
    --accent-color-dark: #9a6b3a;
    --button-color: #a67a4a;
    --button-hover-color: #95693a;
    --button-text-color: #ffffff;

    /* --- Card Colors --- */
    --card-color-primary: #eee1d2;
    --card-color-secondary: #e0caae;
    --card-color-accent: #d4b999;

    /* --- Gradients & Overlays --- */
    --body-bg-gradient: linear-gradient(145deg, var(--epaper-background), var(--surface-color));
    --card-bg: linear-gradient(165deg, var(--card-color-primary) 0%, var(--card-color-secondary) 100%);
    --card-bg-hover: linear-gradient(165deg, var(--card-color-secondary) 0%, var(--card-color-accent) 100%);
    --button-gradient: linear-gradient(150deg, var(--accent-color-light), var(--accent-color));
    --button-gradient-hover: linear-gradient(150deg, var(--accent-color), var(--accent-color-dark));
    --light-gradient-overlay: linear-gradient(145deg, rgba(from var(--surface-color) r g b / 0.85) 0%, rgba(from var(--surface-color) r g b / 0.35) 70%);
    --accent-gradient-overlay: linear-gradient(145deg, rgba(from var(--accent-color) r g b / 0.18) 0%, rgba(from var(--accent-color) r g b / 0.08) 80%);

    /* --- Shadows --- */
    --elevation-1: 0 2px 4px rgba(74, 63, 53, 0.04), 0 4px 8px rgba(74, 63, 53, 0.04);
    --elevation-2: 0 4px 8px rgba(74, 63, 53, 0.06), 0 8px 16px rgba(74, 63, 53, 0.06);
    --elevation-3: 0 8px 16px rgba(74, 63, 53, 0.08), 0 16px 32px rgba(74, 63, 53, 0.08);
    --card-shadow: 0 2px 4px rgba(74, 63, 53, 0.05), 0 4px 8px rgba(74, 63, 53, 0.05), inset 0 1px 0 rgba(255, 255, 255, 0.95);
    --card-shadow-hover: 0 4px 8px rgba(74, 63, 53, 0.08), 0 8px 16px rgba(74, 63, 53, 0.08), inset 0 1px 0 rgba(255, 255, 255, 1);

    /* === Structural & Sizing Variables === */
    --base-unit: 8px;
    --spacing-xs: var(--base-unit);
    --spacing-sm: calc(var(--base-unit) * 1.618);
    --spacing-md: calc(var(--base-unit) * 2.618);
    --spacing-lg: calc(var(--base-unit) * 4.236);
    --spacing-xl: calc(var(--base-unit) * 6.854);
    --spacing-xxl: calc(var(--base-unit) * 11.090);
    --spacing-xxxl: calc(var(--base-unit) * 17.944);

    /* Typography scale */
    --font-size-base: 16px;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: var(--font-size-base);
    --font-size-lg: calc(var(--font-size-base) * 1.618);
    --font-size-xl: calc(var(--font-size-base) * 2.618);
    --font-size-xxl: calc(var(--font-size-base) * 4.236);
    --font-size-xxxl: calc(var(--font-size-base) * 6.854);

    /* Fonts */
    --font-family-primary: "Cabin", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-secondary: "Instrument Serif", Georgia, serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 600;
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    --letter-spacing-tight: -0.015em;
    --letter-spacing-normal: 0em;
    --letter-spacing-wide: 0.015em;
    --letter-spacing-wider: 0.05em;

    /* Border radius & transitions */
    --radius-base: 8px;
    --border-radius-small: var(--radius-base);
    --border-radius-medium: calc(var(--radius-base) * 2);
    --border-radius-large: calc(var(--radius-base) * 3);
    --border-radius-circle: 50%;
    --transition-duration-fast: 200ms;
    --transition-duration-medium: 400ms;
    --transition-timing-function-ease: ease;
    --transition-timing-function-cubic: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all var(--transition-duration-fast) var(--transition-timing-function-ease);
    --transition-medium: all var(--transition-duration-medium) var(--transition-timing-function-ease);

    /* Layout */
    --container-max-width: 1400px;
    --section-max-width: 640px;
    --card-border: 1px solid var(--border-color-base);

    /* Navigation */
    --nav-height: 4rem;
    --nav-bg: var(--surface-color);
    --nav-blur: 8px;
    --nav-transition: all 0.3s var(--transition-timing-function-cubic);
    --nav-mobile-height: calc(100vh - var(--nav-height));
    --nav-mobile-bg: rgba(from var(--surface-color) r g b / 0.97);

    /* Section backgrounds */
    --section-bg-primary: linear-gradient(165deg, var(--surface-color) 0%, var(--card-color-primary) 100%);
    --section-bg-accent: linear-gradient(165deg, var(--card-color-secondary) 0%, var(--card-color-accent) 100%);

}

/* Animation */
@keyframes fadeInRise {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================== */
/* == Base Styles == */
/* ============================================== */

html {
    /* Smooth in-page navigation, offset so anchors clear the fixed navbar */
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + var(--spacing-md));
}

body {
    background: var(--body-bg-gradient);
    color: var(--text-color-primary);
    font-family: var(--font-family-primary);
    line-height: 1.6;
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

p {
    color: var(--text-color-secondary);
    margin-top: 0;
    flex-grow: 1;
}

img {
    max-width: 100%;
    display: block;
}

/* Accessible, theme-consistent focus ring for keyboard users */
:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
    border-radius: var(--radius-base);
}

/* ============================================== */
/* == Scroll Reveal (.fade-in) == */
/* ============================================== */

.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--transition-timing-function-cubic),
                transform 0.7s var(--transition-timing-function-cubic);
    will-change: opacity, transform;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .fade-in {
        opacity: 1;
        transform: none;
    }
}

/* ============================================== */
/* == Unified Card & Button Components == */
/* ============================================== */

/* Base card component - consolidated all card-like elements */
.card,
.feature,
.eink-benefit,
.integration-item,
.testimonial-card {
    background: var(--section-bg-primary);
    border-radius: var(--border-radius-medium);
    border: var(--card-border);
    box-shadow: var(--card-shadow), 0 12px 24px 0 rgba(101, 82, 66, 0.09), 0 3px 2px rgba(255, 255, 255, 0.83) inset;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg);
    text-align: left;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.card::before,
.feature::before,
.eink-benefit::before,
.integration-item::before,
.testimonial-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--light-gradient-overlay);
    opacity: 0.5;
    transition: opacity var(--transition-duration-fast) var(--transition-timing-function-ease);
    pointer-events: none;
}

.card:hover,
.feature:hover,
.eink-benefit:hover,
.integration-item:hover,
.testimonial-card:hover {
    transform: scale(1.01);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--border-color-accent);
}

.card:hover::before,
.feature:hover::before,
.eink-benefit:hover::before,
.integration-item:hover::before,
.testimonial-card:hover::before {
    opacity: 0.7;
}

/* Card variations */
.card-elevated,
.feature.card-elevated,
.eink-benefit.card-elevated,
.integration-item.card-elevated {
    box-shadow: var(--elevation-2);
    border: none;
}

.card-elevated:hover,
.feature.card-elevated:hover,
.eink-benefit.card-elevated:hover,
.integration-item.card-elevated:hover {
    box-shadow: var(--elevation-3);
    transform: translateY(-2px);
}

.card-accent,
.product-cta.card-accent {
    background: var(--section-bg-accent);
    border-color: var(--border-color-accent);
}

.card-accent::before,
.product-cta.card-accent::before {
    background: var(--accent-gradient-overlay);
    opacity: 0.6;
}

.card-accent:hover::before,
.product-cta.card-accent:hover::before {
    opacity: 0.8;
    background: linear-gradient(145deg, rgba(from var(--accent-color) r g b / 0.25) 0%, rgba(from var(--accent-color) r g b / 0.08) 80%);
}

/* Consolidated button styles */
.button,
.back-to-top {
    font-family: var(--font-family-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-small);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
    cursor: pointer;
    box-shadow: var(--elevation-1);
    gap: var(--spacing-xs);
    border: none;
    text-align: center; /* Ensure text is centered */
    white-space: nowrap; /* Prevent text from wrapping */
}

.button:hover,
.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

.button-primary {
    background: var(--button-gradient);
    color: var(--button-text-color);
    font-weight: var(--font-weight-bold);
}

.button-primary:hover {
    background: var(--button-gradient-hover);
}

.button-secondary {
    background: var(--surface-color);
    color: var(--accent-color);
    border: 1px solid var(--border-color-accent);
    font-weight: var(--font-weight-medium);
}

.button-secondary:hover {
    background: var(--card-color-primary);
}

/* ============================================== */
/* == Layout Components == */
/* ============================================== */

.product-container {
    display: flex;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    /* Clear the fixed navbar plus a little breathing room */
    padding-top: calc(var(--nav-height) + var(--spacing-xl));
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* ============================================== */
/* == Navigation == */
/* ============================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(from var(--surface-color) r g b / 0.72);
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    z-index: 1000;
    transition: height var(--transition-duration-medium) var(--transition-timing-function-cubic),
                background var(--transition-duration-medium) var(--transition-timing-function-cubic),
                box-shadow var(--transition-duration-medium) var(--transition-timing-function-cubic),
                border-color var(--transition-duration-medium) var(--transition-timing-function-cubic);
}

/* Elevated state once the page is scrolled (height stays constant) */
.navbar.scrolled {
    background: rgba(from var(--surface-color) r g b / 0.92);
    border-bottom-color: var(--border-color-base);
    box-shadow: 0 6px 24px rgba(101, 82, 66, 0.10);
}

.navbar-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--spacing-md);
}

/* === Brand === */
.navbar-brand {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    position: relative;
    z-index: 2;
}

.navbar-logo {
    font-family: var(--font-family-secondary);
    font-size: var(--font-size-lg);
    background: var(--button-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--letter-spacing-tight);
}

/* === Centered navigation === */
.primary-navigation-container {
    justify-self: center;
}

.primary-navigation {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-link {
    color: var(--text-color-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 999px;
    transition: color var(--transition-duration-fast) var(--transition-timing-function-ease),
                background-color var(--transition-duration-fast) var(--transition-timing-function-ease);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 2px;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    border-radius: 2px;
    transform: translateX(-50%);
    transition: width 0.3s var(--transition-timing-function-cubic);
}

.nav-link:hover {
    color: var(--accent-color-dark);
    background-color: rgba(from var(--accent-color) r g b / 0.08);
}

.nav-link.active {
    color: var(--accent-color-dark);
}

.nav-link.active::after {
    width: 55%;
}

/* === Right-side actions === */
.navbar-actions {
    justify-self: end;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-cta {
    padding: 0.55em 1.4em;
    font-size: var(--font-size-sm);
    box-shadow: 0 4px 14px rgba(179, 128, 75, 0.28);
}

.nav-cta--drawer {
    display: none;
}

/* === Hamburger === */
.menu-toggle {
    display: none;
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 2;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
    display: block;
    width: 24px;
    height: 2px;
    border-radius: 2px;
    background: var(--text-color-primary);
    transition: transform var(--transition-duration-fast) var(--transition-timing-function-cubic),
                top var(--transition-duration-fast) var(--transition-timing-function-cubic),
                bottom var(--transition-duration-fast) var(--transition-timing-function-cubic),
                background var(--transition-duration-fast) var(--transition-timing-function-cubic);
}

.menu-icon {
    position: relative;
}

.menu-icon::before,
.menu-icon::after {
    content: '';
    position: absolute;
    left: 0;
}

.menu-icon::before { top: -7px; }
.menu-icon::after { bottom: -7px; }

/* ============================================== */
/* == Components == */
/* ============================================== */

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to bottom, rgba(from var(--surface-color) r g b / 0.6), rgba(from var(--surface-color) r g b / 0.25));
    backdrop-filter: blur(8px);
    border-radius: var(--border-radius-medium);
    outline: 1px solid var(--border-color-base);
    outline-offset: -1px;
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--accent-color);
    font-size: 11px;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.6px;
    text-transform: uppercase;
    box-shadow: var(--elevation-1);
    transform-origin: center;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.badge:hover {
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.25));
    transform: translateY(-1px) scale(1.03);
    box-shadow: var(--elevation-2);
}

.badge-icon {
    font-size: 0.85em;
    color: inherit;
    opacity: 0.85;
}

/* ============================================== */
/* == Section Headers == */
/* ============================================== */

.section-header {
    text-align: center;
    position: relative;
}

.section-title {
    font-family: var(--font-family-secondary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-subtitle {
    font-size: var(--font-size-md);
    color: var(--text-color-secondary);
}

/* ============================================== */
/* == Grid Layouts == */
/* ============================================== */

.features-container,
.eink-benefits-grid,
.product-features,
.comparison-grid,
.testimonials-grid,
.integrations-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.features-container,
.eink-benefits-grid,
.product-features,
.integrations-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.comparison-grid,
.testimonials-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

/* ============================================== */
/* == Hero Section == */
/* ============================================== */

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
}

.product-hero {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    min-height: 60vh;
    overflow: hidden;
    background: var(--accent-gradient-overlay);
    padding: var(--spacing-xl) 6vw;
    border-radius: var(--border-radius-medium);
    border: var(--border-color-base) solid 1px;
    position: relative;
    box-shadow: 0 6px 32px 0 rgba(101, 82, 66, 0.07), 0 2px 5px rgba(255,255,255,0.8) inset, 0 1.5px 0 rgba(0,0,0,0.05) inset;
}

.product-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.04;
    background: repeating-radial-gradient(circle at 100% 80%, var(--accent-color-light) 0px, var(--accent-color-light) 2px, transparent 18px, transparent 120px);
    transition: opacity 0.4s var(--transition-timing-function-cubic);
}

.product-hero > * {
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1 1 50%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
    min-width: 320px;
    animation: fadeInRise 1.1s var(--transition-timing-function-cubic) 0.1s backwards;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    background: rgba(255, 255, 255, 0.8);
    color: var(--accent-color);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 0.4em 1em;
    border-radius: 999px;
    box-shadow: 0 2px 8px rgba(179, 128, 75, 0.1);
    border: 1px solid rgba(179, 128, 75, 0.15);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    backdrop-filter: blur(3px);
    transition: all 0.3s ease;
}

.hero-badge:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

.hero-title {
    font-family: var(--font-family-secondary);
    font-size: var(--font-size-xxl);
    font-weight: var(--font-weight-bold);
    color: var(--text-color-primary);
    line-height: var(--line-height-tight);
    margin: 0 0 var(--spacing-sm) 0;
    position: relative;
}

.hero-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 70px;
    height: 4px;
    background: linear-gradient(to right, var(--accent-color-light), var(--accent-color-dark));
    border-radius: 2px;
    opacity: 0.7;
}

.hero-subtitle {
    margin-bottom: var(--spacing-md);
    max-width: 400px;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 320px;
    position: relative;
    animation: fadeInRise 1.2s var(--transition-timing-function-cubic) 0.2s backwards;
}

.hero-mockup-iframe {
    border: none;
    border-radius: 2rem;
    height: 620px;
    max-width: 90vw;
    aspect-ratio: 8/12;
    z-index: 1;
    backdrop-filter: blur(2px);
    transition: all 0.4s var(--transition-timing-function-cubic);
}

.hero-mockup-iframe:hover {
    transform: translateY(-5px);
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-lg);
    animation: fadeInRise 1.3s var(--transition-timing-function-cubic) 0.3s backwards;
}

/* ============================================== */
/* == Back to Top Button == */
/* ============================================== */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    padding: 0;
    background: var(--button-gradient);
    color: var(--button-text-color);
    border-radius: var(--border-radius-circle);
    opacity: 0;
    visibility: hidden;
    z-index: 100;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--button-gradient-hover);
    transform: translateY(-5px);
    box-shadow: var(--elevation-2);
}

/* ============================================== */
/* == Media Queries (Consolidated) == */
/* ============================================== */

@media (max-width: 768px) {
    /* Navigation */
    .menu-toggle {
        display: block;
    }

    /* Simple two-item bar on mobile; the drawer is positioned separately */
    .navbar-container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-sm);
        padding: 0 var(--spacing-md);
    }

    .nav-cta--bar {
        display: none;
    }

    .menu-toggle[aria-expanded="true"] .menu-icon {
        background: transparent;
    }

    .menu-toggle[aria-expanded="true"] .menu-icon::before {
        top: 0;
        transform: rotate(45deg);
    }

    .menu-toggle[aria-expanded="true"] .menu-icon::after {
        bottom: 0;
        transform: rotate(-45deg);
    }

    .primary-navigation-container {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        /* 100vw (not right:0) so the panel is full-width regardless of the
           navbar's backdrop-filter establishing a containing block */
        width: 100vw;
        height: calc(100dvh - var(--nav-height));
        /* Solid, fully opaque background (avoids relative-color fallbacks) */
        background: var(--surface-color);
        padding: var(--spacing-xl) var(--spacing-lg);
        transform: translateY(-100vh);
        opacity: 0;
        visibility: hidden;
        transition: var(--nav-transition);
        border-bottom: 1px solid var(--border-color-base);
        overflow-y: auto;
        box-shadow: var(--elevation-2);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
        z-index: 999;
    }

    .primary-navigation-container[data-visible="true"] {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .primary-navigation {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: 0;
        width: 100%;
    }

    .nav-link {
        font-size: var(--font-size-md);
        padding: var(--spacing-sm);
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    .nav-cta--drawer {
        display: inline-flex;
        width: 100%;
        max-width: 320px;
    }

    /* Hero section */
    .product-hero {
        flex-direction: column;
        gap: var(--spacing-xl);
        min-height: unset;
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .hero-content,
    .hero-visual {
        min-width: 0;
    }

    .hero-content {
        align-items: center;
        text-align: center;
        gap: var(--spacing-md);
    }

    .hero-title,
    .hero-subtitle {
        text-align: center;
    }

    .hero-title {
        font-size: var(--font-size-xl);
        line-height: 1.2;
        margin-bottom: var(--spacing-sm);
    }

    .hero-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .hero-ctas {
        flex-direction: column;
        gap: var(--spacing-md);
        margin: 0;
        width: 100%;
    }

    .hero-cta-main,
    .hero-cta-secondary {
        text-align: center;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    /* Grid layouts */
    .features-container,
    .eink-benefits-grid,
    .product-features,
    .comparison-grid,
    .testimonials-grid,
    .integrations-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        margin: 0;
    }

    .testimonials-grid {
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }

    /* Footer */
    .footer-top {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-newsletter {
        grid-column: 1 / -1;
        margin-top: var(--spacing-lg);
    }

    .footer-links-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .footer-bottom {
        flex-direction: column-reverse;
        gap: var(--spacing-md);
        text-align: center;
    }

    .newsletter-form {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .newsletter-button {
        width: 100%;
    }

    /* Container spacing */
    .product-container {
        gap: clamp(var(--spacing-lg), 8vw, var(--spacing-xl));
        margin-top: 0;
        padding-top: calc(var(--nav-height) + var(--spacing-md));
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }

    .section-header {
        margin-bottom: clamp(var(--spacing-md), 6vw, var(--spacing-lg));
    }

    .feature,
    .eink-benefit {
        margin: 0;
        gap: clamp(var(--spacing-xs), 2vw, var(--spacing-sm));
    }
}

/* ============================================== */
/* == Utility Classes == */
/* ============================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

/* ============================================== */
/* == Enhanced Feature Section == */
/* ============================================== */

/* Consolidated styles for features and eink benefits */
.features-container, .eink-benefits-grid, .product-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.feature,
.eink-benefit,
.integration-item {
    flex: 1 1 calc(33.333% - var(--spacing-lg));
    min-width: 280px;
}

@media (max-width: 768px) {
    .feature,
    .eink-benefit,
    .integration-item {
        flex: 1 1 100%;
    }
}

.feature-icon-container {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-circle);
    background: linear-gradient(135deg, rgba(from var(--accent-color) r g b / 0.1), rgba(from var(--accent-color) r g b / 0.3));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.feature-icon-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom right, rgba(255, 255, 255, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature:hover .feature-icon-container::before {
    opacity: 1;
}

.feature-icon {
    font-size: 20px;
    color: var(--accent-color);
    filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.15));
    z-index: 1;
}

.feature p {
    color: var(--text-color-secondary);
    margin-bottom: 0;
    flex-grow: 1;
}

/* ============================================== */
/* == Interactive Demo Section == */
/* ============================================== */

.eink-display-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xxl); /* Consistent spacing between sections */
    padding: var(--spacing-xl) 0;
    text-align: center;
    width: 100%;
}

.eink-display-section > section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
        width: 100%;
}

@media screen and (max-width: 768px) {
    .eink-display-section {
        gap: var(--spacing-xl);
        padding: var(--spacing-lg) 0;
    }

    .eink-display-section > section {
        gap: var(--spacing-md);
    }
}

.iframe-container {
    position: relative;
    width: 100%;
    height: 920px;
    border-radius: var(--border-radius-medium);
    overflow: hidden;
    box-shadow: var(--elevation-3);
    border: 2px solid var(--border-color-accent);
    margin-bottom: var(--spacing-xl);
    background: var(--section-bg-primary);
    transition: all 0.4s var(--transition-timing-function-cubic);
    animation: fadeInRise 1.2s var(--transition-timing-function-cubic) 0.2s backwards;
}

.eink-iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.iframe-overlay {
    position: absolute;
    top: 0;
    right: 0;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--border-color-accent); /* This is already a variable, looks good */
    color: white;
    font-size: var(--font-size-xs);
    border-bottom-left-radius: var(--border-radius-small);
}

@media screen and (max-width: 768px) {
    /* Keep the hero mockup's slight scale-down */
    .hero-mockup-iframe {
        transform: scale(0.9);
        transform-origin: center;
    }

    /* Interactive demo: the phone mockup is a fixed 375px-wide element with
       large shadows. Give the iframe a wider/taller logical viewport so the
       phone AND its shadow have room, then scale it down to the column.
       The container height is set to the scaled iframe height (900*0.7=630)
       so nothing is clipped and there is no dead space. */
    .iframe-container {
        height: 630px;
        display: flex;
        align-items: flex-start;
        justify-content: center;
    }

    .eink-iframe {
        flex: 0 0 auto;
        width: 440px;
        max-width: none;
        height: 900px;
        transform: scale(0.7);
        transform-origin: top center;
    }
}

.display-caption {
    margin-top: var(--spacing-lg);
    color: var(--text-color-secondary);
    font-size: var(--font-size-sm);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.caption-note {
    font-size: var(--font-size-xs);
    opacity: 0.7;
    margin-top: var(--spacing-xs);
}

/* ============================================== */
/* == Benefits Section == */
/* ============================================== */

.eink-benefits {
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    margin-bottom: calc(var(--spacing-xl) * 1.5); /* More space below */
}

.eink-benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg); /* Reduced from calc(var(--spacing-xl) * 1.2) */
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl); /* Add bottom margin for separation */
}

.eink-benefit {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: var(--spacing-lg);
    box-sizing: border-box;
    /* Remove width/max-width to allow grid to control sizing */
    /* width: 100%; */
    /* max-width: 100%; */
    text-align: left;
    background: var(--section-bg-primary);
    border-radius: var(--border-radius-medium);
    border: var(--card-border);
    box-shadow: var(--card-shadow);
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.benefit-icon-container {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-circle);
    background: linear-gradient(135deg, rgba(from var(--accent-color) r g b / 0.1), rgba(from var(--accent-color) r g b / 0.3));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.benefit-icon {
    font-size: 20px;
    color: var(--accent-color);
    filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.15));
}

.benefit-stat {
    margin-top: auto;
    padding-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--border-color-base);
}

.stat-number {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--accent-color);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-color-secondary);
}

.benefits-note {
    margin-top: var(--spacing-lg);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-color-tertiary);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================== */
/* == Comparison Section == */
/* ============================================== */

.comparison-section {
    display: flex;
    flex-direction: column;
    width: 100%;
    align-items: center;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg); /* Reduced from calc(var(--spacing-xl) * 1.2) */
    width: 100%;
}

.comparison-card {
    padding: var(--spacing-lg);
    background: var(--surface-color);
    border: 1px solid var(--border-color-base);
    border-radius: var(--border-radius-medium);
    text-align: left;
}

.comparison-card.tidbit {
    border-color: var(--accent-color);
}

h3 .comparison-title {
    font-size: var(--font-size-lg);
    color: var(--text-color-primary);
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color-base);
}

.comparison-header i {
    color: var(--accent-color);
    font-size: var(--font-size-lg);
}

.comparison-feature {
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.comparison-feature.positive i { color: #2d9d78; }
.comparison-feature.negative i { color: #e65f5f; }

@media (max-width: 768px) {
    .comparison-grid {
        grid-template-columns: 1fr;
    }
}

/* == Product CTA Section == */
.product-cta {
    max-width: min(600px, 90vw);
    padding: var(--spacing-xl);
    text-align: center;
    background: var(--surface-color);
}

.cta-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.cta-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    line-height: 1.2;
}

.cta-description {
    font-size: clamp(1rem, 3vw, 1.125rem);
    max-width: 45ch;
    margin: 0 auto;
}

.cta-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) auto;
    max-width: 500px;
}

.cta-feature {
    flex: 1 1 auto;
    min-width: max-content;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color-secondary);
    font-size: clamp(0.875rem, 2.5vw, 1rem);
}

.cta-form {
    display: flex;
    gap: var(--spacing-md);
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

.cta-button {
    padding: 0.75rem 1.5rem;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.cta-button i {
    font-size: 0.85em;
    transition: transform 0.3s ease;
}

.cta-button:hover i {
    transform: translateX(3px);
}

.cta-note {
    font-size: clamp(0.75rem, 2vw, 0.875rem);
    max-width: 40ch;
    margin: 0 auto;
    color: var(--text-color-tertiary);
    margin-top: var(--spacing-md);
}

/* ============================================== */
/* == Footer Section == */
/* ============================================== */

.product-footer {
    background: var(--section-bg-primary);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color-base);
}

.footer-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1.5fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo {
    font-family: var(--font-family-secondary);
    font-size: var(--font-size-lg);
    color: var(--text-color-primary);
}

.footer-tagline {
    color: var(--text-color-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.footer-links-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-heading {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--text-color-secondary);
    margin-bottom: var(--spacing-md);
}

.footer-links-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-link {
    color: var(--text-color-tertiary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--accent-color);
}

.footer-newsletter {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.newsletter-description {
    color: var(--text-color-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
}


/* Input styles */

input {
    flex: 1;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color-base);
    border-radius: var(--border-radius-small);
    background: var(--surface-color);
    font-size: var(--font-size-sm);
    font-family: var(--font-family-primary);
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
}
input:focus::placeholder {
    color: var(--text-color-secondary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color-base);
    margin-top: var(--spacing-xl);
    gap: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-icon {
    color: var(--text-color-tertiary);
    text-decoration: none;
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-icon:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.footer-copyright {
    color: var(--text-color-tertiary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Combined media query for footer at 768px */
@media (max-width: 768px) {
    /* Rules from original 992px (now 768px) and 768px blocks */
    .footer-top {
        /* grid-template-columns: 1fr 2fr; From original 992px, overridden by 1fr below */
        grid-template-columns: 1fr; /* From original 768px */
        gap: var(--spacing-lg);
    }
    .footer-newsletter { /* From original 992px */
        grid-column: 1 / -1;
        margin-top: var(--spacing-lg);
    }

    /* Rules from original 768px and 480px (now 768px) blocks */
    .footer-links-container {
        /* grid-template-columns: repeat(2, 1fr); From original 768px, overridden by 1fr below */
        grid-template-columns: 1fr; /* From original 480px */
        /* gap: var(--spacing-md); From original 768px, overridden by --spacing-sm below */
        gap: var(--spacing-sm); /* From original 480px */
    }
    .footer-bottom { /* From original 768px */
        flex-direction: column-reverse;
        gap: var(--spacing-md);
        text-align: center;
    }

    /* Rules from original 480px (now 768px) block */
    .newsletter-form {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    .newsletter-button {
        width: 100%;
    }
}

/* ============================================== */
/* == Testimonials Section == */
/* ============================================== */

.testimonials-section {
    position: relative;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg); /* Reduced from calc(var(--spacing-xl) * 1.2) */
}

.testimonial-card {
    position: relative;
    background: var(--surface-color);
    border: 1px solid var(--border-color-base);
    border-radius: var(--border-radius-medium);
    padding: var(--spacing-xxl) var(--spacing-lg) var(--spacing-lg);
    transition: all 0.3s var(--transition-timing-function-cubic);
    text-align: left;
    overflow: visible;
    margin-top: var(--spacing-md);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
    box-shadow: var(--elevation-2);
}

.testimonial-avatar {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--surface-color);
    box-shadow: var(--elevation-1);
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.testimonial-card:hover .testimonial-avatar img {
    transform: scale(1.1);
}

.avatar-accent {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, 
        rgba(from var(--accent-color) r g b / 0.2),
        transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.testimonial-card:hover .avatar-accent {
    opacity: 1;
}

.testimonial-content {
    text-align: center;
}

.testimonial-text {
    color: var(--text-color-primary);
    font-size: var(--font-size-md);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
    position: relative;
}

.testimonial-text::before,
.testimonial-text::after {
    content: '"';
    position: absolute;
    font-family: var(--font-family-secondary);
    font-size: 4em;
    color: var(--accent-color);
    opacity: 0.1;
    line-height: 1;
}

.testimonial-text::before {
    top: -30px;
    left: -10px;
}

.testimonial-text::after {
    bottom: -40px;
    right: -10px;
}

.testimonial-author {
    margin-top: var(--spacing-md);
}

.author-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.author-name {
    font-weight: var(--font-weight-bold);
    color: var(--text-color-primary);
}

.author-role {
    font-size: var(--font-size-sm);
    color: var(--accent-color);
    font-weight: var(--font-weight-medium);
}

/* The @media (max-width: 992px) block for testimonials-grid is removed.
   Its rules are superseded by the existing 768px rules below when breakpoints are standardized. */
@media (max-width: 768px) {
    .testimonials-grid {
        /* grid-template-columns: repeat(2, 1fr); From original 992px, overridden by 1fr below */
        /* gap: var(--spacing-lg); From original 992px, overridden by --spacing-md below */
        grid-template-columns: 1fr;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
        gap: var(--spacing-md);
    }
    .testimonial-card {
        padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
    }
}

/* ============================================== */
/* == Integrations Section == */
/* ============================================== */

.integrations-section {
    text-align: center;
    display: flex;
    flex-direction: column;
}

.integrations-grid {
        width: 100%;

    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.integration-item {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.integration-logo {
    font-size: var(--font-size-lg);
    color: var(--accent-color);
    width: 60px; /* Fixed width */
    height: 60px; /* Fixed height */
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(from var(--accent-color) r g b / 0.05);
    border-radius: var(--border-radius-circle);
    transition: var(--transition-fast);
}

.integration-item:hover .integration-logo {
    background-color: rgba(from var(--accent-color) r g b / 0.1);
    transform: scale(1.05);
}

.integration-name {
    font-family: var(--font-family-primary);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-md); /* Adjusted for consistency */
    color: var(--text-color-primary);
}

.integration-description {
    font-size: var(--font-size-sm);
    color: var(--text-color-secondary);
    line-height: var(--line-height-normal);
    flex-grow: 1;
    margin-bottom: 0;
}

.integrations-footer {
    margin-top: var(--spacing-xl);
    font-size: var(--font-size-md);
    color: var(--text-color-secondary);
}

.integrations-footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
}

.integrations-footer a:hover {
    text-decoration: underline;
}

/* ============================================== */
/* == Quote Section (Serene & Beautiful) == */
/* ============================================== */

.quote-section {
    margin: 0 auto;
    padding: var(--spacing-xxl) 16vw;
    background: linear-gradient(135deg, var(--epaper-background) 70%, var(--surface-color) 100%);
    border-radius: var(--border-radius-large);
    box-shadow: 0 6px 32px 0 rgba(101, 82, 66, 0.07), 0 5px 10px rgba(255,255,255,0.5) inset, 0 1.5px 0 rgba(0,0,0,0.05) inset;
    border: 1px solid var(--card-color-primary);
    position: relative;
    text-align: center;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: fadeInRise 1.2s var(--transition-timing-function-cubic) 0.1s backwards;
}

.quote-section::before {
    content: '';
    position: absolute;
    top: -60px;
    left: -60px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, var(--accent-color-light) 0%, transparent 80%);
    opacity: 0.13;
    z-index: 0;
    pointer-events: none;
}

.quote-section::after {
    content: '';
    position: absolute;
    bottom: -60px;
    right: -60px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, var(--accent-color-dark) 0%, transparent 80%);
    opacity: 0.10;
    z-index: 0;
    pointer-events: none;
}

.quote-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.quote-text {
    font-family: var(--font-family-secondary);
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    color: var(--text-color-primary);
    line-height: 1.4;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding: var(--spacing-lg) var(--spacing-md);
    background: none;
}

.quote-text::before,
.quote-text::after {
    font-family: var(--font-family-secondary);
    font-size: 3.5em;
    color: var(--accent-color);
    opacity: 0.13;
    position: absolute;
    line-height: 1;
    pointer-events: none;
}

.quote-text::before {
    content: "“";
    top: -0.1em;
    left: -0.2em;
}

.quote-text::after {
    content: "”";
    bottom: -0.6em;
    right: -0.2em;
}

.quote-author {
    font-size: var(--font-size-md);
    color: var(--accent-color);
    font-family: var(--font-family-primary);
    font-weight: var(--font-weight-bold);
    margin-top: var(--spacing-md);
    letter-spacing: var(--letter-spacing-wide);
}

.quote-role {
    font-size: var(--font-size-sm);
    color: var(--text-color-secondary);
    margin-top: var(--spacing-xs);
    font-style: italic;
    font-weight: var(--font-weight-medium);
}

@media (max-width: 768px) {
    .quote-section {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    .quote-text {
        font-size: clamp(1.1rem, 8vw, 2rem);
        padding: var(--spacing-md) var(--spacing-xs);
    }
}

/* ============================================== */
/* == Developer Program Section (Beautiful & Serene) == */
/* ============================================== */

.developer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    width: 100%;
    max-width: 800px;
    /* padding: var(--spacing-lg) var(--spacing-md); */
        background: linear-gradient(135deg, var(--epaper-background) 70%, var(--surface-color) 100%);
    border-radius: var(--border-radius-large);
    box-shadow: 0 6px 32px 0 rgba(101, 82, 66, 0.07), 0 1.5px 0 rgba(255,255,255,0.7) inset;
    padding: var(--spacing-xl) var(--spacing-xl);
    border: 1px solid var(--card-color-primary);
}

.developer-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    background: var(--surface-color);
    color: var(--accent-color);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 0.5em 1.2em;
    border-radius: 999px;
    box-shadow: 0 2px 8px rgba(179, 128, 75, 0.08);
    border: 1px solid rgba(179, 128, 75, 0.15);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.developer-title {
    font-family: var(--font-family-secondary);
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    color: var(--text-color-primary);
    font-weight: var(--font-weight-bold);
    margin: var(--spacing-sm) 0;
    letter-spacing: var(--letter-spacing-tight);
}

.developer-description {
    font-size: var(--font-size-md);
    color: var(--text-color-secondary);
    max-width: 36ch;
    line-height: 1.6;
}

.developer-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--spacing-md);
    width: 100%;
    max-width: 480px;
}

.developer-feature {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--text-color-secondary);
    font-size: var(--font-size-sm);

      padding: var(--spacing-sm);
        background: var(--surface-color);
        border-radius: var(--border-radius-medium);
        border: 1px solid var(--border-color-base);
}

.developer-feature i {
    color: var(--accent-color);
    font-size: 1.1em;
}

.developer-form {
    display: flex;
    gap: var(--spacing-sm);
    width: 100%;
    max-width: 440px;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.developer-button {
    padding: 0.875rem 1.5rem;
    white-space: nowrap;
}

.developer-note {
    font-size: var(--font-size-sm);
    color: var(--text-color-tertiary);
}

@media (max-width: 768px) {
    .developer-form {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .developer-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .developer-feature {
        justify-content: center;
        text-align: center;
        gap: 0.5rem;
        font-size: var(--font-size-md);
      
    }
}

/* ============================================== */
/* == Premium Product Pass == */
/* ============================================== */

:root {
    --epaper-background: #f5f5f7;
    --surface-color: #ffffff;
    --border-color-base: rgba(29, 29, 31, 0.12);
    --border-color-accent: #0071e3;

    --text-color-primary: #1d1d1f;
    --text-color-secondary: #424245;
    --text-color-tertiary: #6e6e73;

    --accent-color: #0071e3;
    --accent-color-light: #2997ff;
    --accent-color-dark: #0057b8;
    --button-color: #0071e3;
    --button-hover-color: #005ecb;
    --button-text-color: #ffffff;

    --card-color-primary: #ffffff;
    --card-color-secondary: #f5f5f7;
    --card-color-accent: #e8f2ff;

    --body-bg-gradient:
        linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 44%, #ffffff 100%);
    --card-bg: #ffffff;
    --card-bg-hover: #ffffff;
    --button-gradient: linear-gradient(135deg, #0071e3 0%, #2997ff 100%);
    --button-gradient-hover: linear-gradient(135deg, #005ecb 0%, #0071e3 100%);
    --light-gradient-overlay: linear-gradient(180deg, rgba(255, 255, 255, 0.65), rgba(255, 255, 255, 0));
    --accent-gradient-overlay: linear-gradient(135deg, rgba(0, 113, 227, 0.12), rgba(52, 199, 89, 0.08));

    --elevation-1: 0 1px 2px rgba(0, 0, 0, 0.04);
    --elevation-2: 0 12px 30px rgba(0, 0, 0, 0.08);
    --elevation-3: 0 32px 80px rgba(0, 0, 0, 0.12);
    --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    --card-shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.10);

    --font-family-primary: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    --font-family-secondary: var(--font-family-primary);
    --font-weight-bold: 700;
    --letter-spacing-tight: 0;
    --letter-spacing-wide: 0;
    --letter-spacing-wider: 0;

    --radius-base: 8px;
    --border-radius-small: 8px;
    --border-radius-medium: 8px;
    --border-radius-large: 16px;
    --section-max-width: 760px;
}

* {
    letter-spacing: 0;
}

html {
    background: #fbfbfd;
}

body {
    min-width: 320px;
    background: var(--body-bg-gradient);
    color: var(--text-color-primary);
}

body,
button,
input {
    font-family: var(--font-family-primary);
}

p {
    color: var(--text-color-secondary);
}

.product-container {
    max-width: none;
    width: 100%;
    padding: var(--nav-height) 0 0;
    gap: 0;
    overflow: hidden;
}

main {
    width: 100%;
    gap: 0;
}

.navbar {
    background: rgba(251, 251, 253, 0.78);
    border-bottom-color: rgba(0, 0, 0, 0.05);
    box-shadow: none;
}

.navbar.scrolled {
    background: rgba(251, 251, 253, 0.92);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.navbar-logo {
    background: none;
    color: var(--text-color-primary);
    -webkit-text-fill-color: currentColor;
    font-family: var(--font-family-primary);
    font-size: 1.1rem;
    font-weight: 700;
}

.nav-link {
    color: var(--text-color-tertiary);
    font-size: 0.875rem;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-color-primary);
    background: rgba(0, 0, 0, 0.045);
}

.nav-link::after {
    display: none;
}

.button,
.back-to-top {
    min-height: 44px;
    border-radius: 999px;
    padding: 0.78rem 1.35rem;
    box-shadow: none;
    font-weight: 700;
}

.button-primary {
    background: var(--accent-color);
    color: #ffffff;
}

.button-primary:hover {
    background: var(--accent-color-dark);
}

.button-secondary {
    color: var(--accent-color);
    background: rgba(0, 113, 227, 0.08);
    border: 1px solid rgba(0, 113, 227, 0.14);
}

.button-secondary:hover {
    background: rgba(0, 113, 227, 0.14);
}

.nav-cta {
    min-height: 36px;
    padding: 0.45rem 1rem;
    box-shadow: none;
}

.product-hero {
    width: 100%;
    min-height: calc(100svh - var(--nav-height));
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
    align-items: center;
    gap: 3.5rem;
    padding: 4.5rem max(1.5rem, calc((100vw - 1240px) / 2 + 1.5rem)) 3rem;
    background:
        linear-gradient(118deg, transparent 0%, transparent 48%, rgba(0, 113, 227, 0.08) 48%, transparent 68%),
        linear-gradient(180deg, #ffffff 0%, #f5f5f7 82%, #ffffff 100%);
    border: 0;
    border-radius: 0;
    box-shadow: none;
    isolation: isolate;
}

.product-hero::before {
    background:
        repeating-linear-gradient(90deg, rgba(29, 29, 31, 0.035) 0 1px, transparent 1px 96px),
        repeating-linear-gradient(0deg, rgba(29, 29, 31, 0.03) 0 1px, transparent 1px 96px);
    opacity: 0.36;
}

.product-hero::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(29, 29, 31, 0.18), transparent);
}

.hero-content {
    max-width: 36rem;
    gap: 1.25rem;
}

.hero-badge {
    padding: 0.45rem 0.75rem;
    background: #1d1d1f;
    color: #ffffff;
    border: 0;
    border-radius: 999px;
    box-shadow: none;
    text-transform: none;
    font-size: 0.8125rem;
    font-weight: 700;
}

.hero-badge i {
    color: #34c759;
    font-size: 0.45rem;
}

.hero-eyebrow {
    margin: 0;
    color: var(--text-color-tertiary);
    font-size: 1.1875rem;
    font-weight: 700;
}

.hero-title {
    margin: 0;
    color: var(--text-color-primary);
    font-family: var(--font-family-primary);
    font-size: 6rem;
    font-weight: 800;
    line-height: 0.92;
}

.hero-title::after {
    display: none;
}

.hero-subtitle {
    max-width: 34rem;
    margin: 0;
    color: var(--text-color-secondary);
    font-size: 1.375rem;
    font-weight: 600;
    line-height: 1.36;
}

.hero-ctas {
    gap: 0.75rem;
    margin-top: 0.25rem;
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
    max-width: 31rem;
    margin-top: 0.75rem;
    overflow: hidden;
    background: #d2d2d7;
    border: 1px solid #d2d2d7;
    border-radius: 8px;
    gap: 1px;
}

.hero-metric {
    min-height: 6rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.82);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hero-metric strong {
    color: var(--text-color-primary);
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1;
}

.hero-metric span {
    color: var(--text-color-tertiary);
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.25;
}

.hero-visual {
    width: 100%;
    min-width: 0;
    min-height: 40rem;
    align-self: stretch;
}

.hero-visual::after {
    content: '';
    position: absolute;
    left: 16%;
    right: 8%;
    bottom: 3.5rem;
    height: 1.5rem;
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.26), transparent);
    filter: blur(18px);
    transform: skewX(-10deg);
}

.hero-device-frame {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: min(100%, 42rem);
    min-height: 40rem;
    margin-left: auto;
}

.hero-mockup-iframe {
    width: auto;
    height: 42rem;
    max-width: min(90vw, 31rem);
    border-radius: 2rem;
    filter: drop-shadow(0 2.5rem 3.5rem rgba(0, 0, 0, 0.22));
    transform: translateY(0.5rem) rotate(-1.5deg);
    pointer-events: none;
}

.hero-mockup-iframe:hover {
    transform: translateY(0.25rem) rotate(-1.5deg);
}

.hero-caption {
    position: absolute;
    z-index: 2;
    right: 3%;
    bottom: 17%;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding-left: 0.85rem;
    border-left: 1px solid rgba(29, 29, 31, 0.18);
    color: var(--text-color-tertiary);
    font-size: 0.875rem;
    font-weight: 700;
}

.product-strip {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding: 0 max(1.5rem, calc((100vw - 1240px) / 2 + 1.5rem));
    background: #ffffff;
    border-top: 1px solid rgba(29, 29, 31, 0.08);
    border-bottom: 1px solid rgba(29, 29, 31, 0.08);
}

.product-strip-item {
    min-height: 7rem;
    padding: 1.5rem;
    border-left: 1px solid rgba(29, 29, 31, 0.08);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.35rem;
}

.product-strip-item:last-child {
    border-right: 1px solid rgba(29, 29, 31, 0.08);
}

.product-strip-item span {
    color: var(--text-color-tertiary);
    font-size: 0.8125rem;
    font-weight: 700;
}

.product-strip-item strong {
    color: var(--text-color-primary);
    font-size: 1.15rem;
    line-height: 1.2;
}

.eink-display-section,
.product-features,
.how-it-works-section,
.comparison-section,
.testimonials-section,
.integrations-section {
    width: min(calc(100% - 3rem), 1180px);
    margin: 0 auto;
    padding: 6rem 0;
    display: block;
}

.section-header {
    max-width: var(--section-max-width);
    margin: 0 auto 2.5rem;
}

.section-eyebrow {
    margin: 0 0 0.8rem;
    color: var(--accent-color);
    font-size: 0.875rem;
    font-weight: 800;
}

.section-title {
    display: block;
    margin: 0;
    color: var(--text-color-primary);
    font-family: var(--font-family-primary);
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.04;
}

.section-subtitle {
    max-width: 42rem;
    margin: 1rem auto 0;
    color: var(--text-color-tertiary);
    font-size: 1.125rem;
    font-weight: 500;
    line-height: 1.45;
}

.iframe-container {
    height: 54rem;
    margin: 0;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 45%),
        linear-gradient(180deg, #1d1d1f 0%, #2c2c2e 100%);
    border: 0;
    border-radius: 8px;
    box-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.18);
}

.iframe-overlay {
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.92);
    color: #1d1d1f;
    border-radius: 999px;
    padding: 0.45rem 0.8rem;
    font-size: 0.8125rem;
    font-weight: 800;
}

.quote-section {
    width: 100%;
    margin: 0;
    padding: 6.5rem max(1.5rem, calc((100vw - 980px) / 2 + 1.5rem));
    background: #1d1d1f;
    border: 0;
    border-radius: 0;
    box-shadow: none;
}

.quote-section::before,
.quote-section::after,
.quote-text::before,
.quote-text::after {
    display: none;
}

.quote-section blockquote {
    width: 100%;
}

.quote-text {
    padding: 0;
    margin: 0;
    color: #f5f5f7;
    font-family: var(--font-family-primary);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.05;
}

.quote-author {
    display: inline-flex;
    margin-top: 1.5rem;
    color: #a1a1a6;
    font-size: 1rem;
    font-weight: 700;
}

.features-container,
.integrations-grid,
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    width: 100%;
}

.feature,
.integration-item,
.testimonial-card,
.comparison-card,
.developer-content {
    min-width: 0;
    border-radius: 8px;
    border: 1px solid rgba(29, 29, 31, 0.1);
    background: rgba(255, 255, 255, 0.88);
    box-shadow: none;
}

.feature,
.integration-item {
    flex: none;
    padding: 1.6rem;
}

.card::before,
.feature::before,
.integration-item::before,
.testimonial-card::before {
    display: none;
}

.feature:hover,
.integration-item:hover,
.testimonial-card:hover,
.comparison-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 113, 227, 0.22);
    box-shadow: var(--card-shadow-hover);
}

.feature h3,
.integration-name,
.comparison-header h3 {
    color: var(--text-color-primary);
    font-size: 1.125rem;
    font-weight: 800;
}

.feature p,
.integration-description {
    color: var(--text-color-tertiary);
    font-weight: 500;
}

.feature-icon-container,
.integration-logo {
    width: 3rem;
    height: 3rem;
    background: #f5f5f7;
    border: 1px solid rgba(29, 29, 31, 0.08);
}

.feature-icon,
.integration-logo {
    color: var(--accent-color);
    filter: none;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.comparison-card {
    padding: 1.75rem;
}

.comparison-card.tidbit {
    background: #1d1d1f;
    border-color: #1d1d1f;
    color: #f5f5f7;
}

.comparison-card.tidbit h3,
.comparison-card.tidbit span {
    color: #f5f5f7;
}

.comparison-card.tidbit .comparison-header {
    border-bottom-color: rgba(255, 255, 255, 0.18);
}

.comparison-header {
    gap: 1rem;
}

.comparison-feature {
    padding: 0.85rem 0;
    color: var(--text-color-secondary);
}

.comparison-feature.positive i {
    color: #34c759;
}

.comparison-feature.negative i {
    color: #ff3b30;
}

.testimonials-section {
    padding-top: 7rem;
}

.testimonial-card {
    margin-top: 2.3rem;
    padding: 4rem 1.5rem 1.5rem;
}

.testimonial-avatar {
    border-color: #ffffff;
}

.testimonial-text {
    color: var(--text-color-primary);
    font-size: 1rem;
    line-height: 1.55;
}

.testimonial-text::before,
.testimonial-text::after {
    display: none;
}

.author-role {
    color: var(--text-color-tertiary);
}

.developer-program-section {
    width: 100%;
    margin: 0;
    padding: 6.5rem 1.5rem;
    background:
        linear-gradient(118deg, transparent 0%, transparent 50%, rgba(0, 113, 227, 0.08) 50%, transparent 72%),
        linear-gradient(180deg, #f5f5f7 0%, #ffffff 100%);
}

.developer-content {
    max-width: 58rem;
    margin: 0 auto;
    padding: 3rem;
}

.developer-badge {
    background: rgba(0, 113, 227, 0.08);
    color: var(--accent-color);
    border-color: rgba(0, 113, 227, 0.12);
    box-shadow: none;
    text-transform: none;
}

.developer-title {
    color: var(--text-color-primary);
    font-family: var(--font-family-primary);
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.05;
}

.developer-description {
    max-width: 36rem;
    margin: 0 auto;
    color: var(--text-color-tertiary);
    font-weight: 500;
}

.developer-feature {
    border-radius: 8px;
    background: #f5f5f7;
    border-color: transparent;
    color: var(--text-color-secondary);
    font-weight: 700;
}

input {
    min-height: 44px;
    border-radius: 8px;
    background: #ffffff;
    color: var(--text-color-primary);
}

.integrations-footer {
    color: var(--text-color-tertiary);
}

.product-footer {
    margin-top: 0;
    background: #f5f5f7;
}

.footer-logo {
    font-family: var(--font-family-primary);
    font-weight: 800;
}

.back-to-top {
    background: #1d1d1f;
}

@media (max-width: 1100px) {
    .product-hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 4rem;
        text-align: center;
    }

    .hero-content {
        align-items: center;
        margin: 0 auto;
    }

    .hero-title,
    .hero-subtitle {
        text-align: center;
    }

    .hero-metrics {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-visual {
        min-height: 35rem;
    }

    .hero-device-frame {
        margin: 0 auto;
        min-height: 35rem;
    }

    .hero-mockup-iframe {
        height: 36rem;
    }

    .hero-caption {
        right: 12%;
    }
}

@media (max-width: 768px) {
    .product-container {
        padding-top: var(--nav-height);
    }

    .product-hero {
        gap: 2rem;
        padding: 3.5rem 1.25rem 2rem;
    }

    .hero-title {
        font-size: 4rem;
    }

    .hero-subtitle {
        font-size: 1.08rem;
        line-height: 1.42;
    }

    .hero-ctas {
        width: 100%;
        max-width: 22rem;
    }

    .hero-ctas .button {
        width: 100%;
    }

    .hero-metrics {
        max-width: 22rem;
    }

    .hero-metric {
        min-height: 5.5rem;
        padding: 0.85rem 0.65rem;
    }

    .hero-metric strong {
        font-size: 1.25rem;
    }

    .hero-metric span {
        font-size: 0.75rem;
    }

    .hero-visual,
    .hero-device-frame {
        min-height: 30rem;
    }

    .hero-mockup-iframe {
        height: 31rem;
        transform: translateY(0) rotate(-1deg);
    }

    .hero-caption {
        display: none;
    }

    .product-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 0 1.25rem;
    }

    .product-strip-item {
        min-height: 6rem;
        padding: 1.1rem 0.9rem;
    }

    .product-strip-item:nth-child(odd) {
        border-left: 1px solid rgba(29, 29, 31, 0.08);
    }

    .product-strip-item strong {
        font-size: 1rem;
    }

    .eink-display-section,
    .product-features,
    .how-it-works-section,
    .comparison-section,
    .testimonials-section,
    .integrations-section {
        width: min(calc(100% - 2.5rem), 42rem);
        padding: 4.25rem 0;
    }

    .section-title {
        font-size: 2.25rem;
        line-height: 1.08;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .iframe-container {
        height: 39.5rem;
    }

    .quote-section {
        padding: 4.5rem 1.25rem;
    }

    .quote-text {
        font-size: 2.4rem;
    }

    .features-container,
    .integrations-grid,
    .testimonials-grid,
    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .feature,
    .integration-item,
    .comparison-card {
        padding: 1.35rem;
    }

    .developer-program-section {
        padding: 4.5rem 1.25rem;
    }

    .developer-content {
        padding: 2rem 1.25rem;
    }

    .developer-title {
        font-size: 2.25rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 3.35rem;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }

    .hero-metric {
        min-height: auto;
        gap: 0.35rem;
    }

    .product-strip {
        grid-template-columns: 1fr;
    }

    .product-strip-item,
    .product-strip-item:last-child {
        border-right: 1px solid rgba(29, 29, 31, 0.08);
    }

    .quote-text {
        font-size: 2rem;
    }
}

/* ============================================== */
/* == Sleek Dark Hero Refinement == */
/* ============================================== */

:root {
    --font-family-primary: "Sora", "Avenir Next", "Helvetica Neue", Arial, sans-serif;
    --font-family-secondary: var(--font-family-primary);
}

body,
button,
input {
    font-family: var(--font-family-primary);
}

.navbar {
    background: rgba(0, 0, 0, 0.72);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.88);
    border-bottom-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28);
}

.navbar-logo,
.nav-link,
.menu-icon,
.menu-icon::before,
.menu-icon::after {
    color: #f5f5f7;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
    background: #f5f5f7;
}

.navbar-logo {
    font-weight: 800;
}

.nav-link {
    color: rgba(245, 245, 247, 0.72);
}

.nav-link:hover,
.nav-link.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.product-hero {
    min-height: calc(100svh - var(--nav-height));
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(28rem, 1fr) auto;
    align-items: stretch;
    gap: 0;
    padding: 0 max(1.5rem, calc((100vw - 1520px) / 2 + 1.5rem)) 4.5rem;
    overflow: hidden;
    background:
        linear-gradient(180deg, #000000 0%, #020202 62%, #050505 100%);
    color: #f5f5f7;
}

.product-hero::before {
    background:
        linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.04) 48%, transparent 72%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.07) 0%, transparent 24%);
    opacity: 1;
}

.product-hero::after {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.hero-visual {
    grid-column: 1;
    grid-row: 1;
    min-height: 0;
    width: 100%;
    align-self: stretch;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 1.5rem;
}

.hero-visual::before {
    content: '';
    position: absolute;
    left: 12%;
    right: 12%;
    top: 16%;
    height: 36%;
    background: linear-gradient(90deg, transparent, rgba(190, 230, 255, 0.18), transparent);
    filter: blur(44px);
    opacity: 0.8;
    transform: skewX(-12deg);
}

.hero-visual::after {
    left: 20%;
    right: 20%;
    bottom: 1.75rem;
    height: 2rem;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
    filter: blur(26px);
    opacity: 0.62;
    transform: none;
}

.hero-device-frame {
    width: min(100%, 74rem);
    min-height: clamp(26rem, 60svh, 44rem);
    margin: 0 auto;
    align-items: center;
}

.hero-device-frame::before,
.hero-device-frame::after {
    content: '';
    position: absolute;
    z-index: 0;
    pointer-events: none;
    border-radius: 8px;
    background:
        linear-gradient(105deg, transparent 0%, rgba(255, 255, 255, 0.16) 45%, transparent 62%),
        linear-gradient(180deg, #151515, #050505);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.hero-device-frame::before {
    width: 23rem;
    height: 34rem;
    left: 10%;
    top: 14%;
    transform: perspective(900px) rotateY(-28deg) rotateZ(-4deg);
    opacity: 0.32;
}

.hero-device-frame::after {
    width: 19rem;
    height: 31rem;
    right: 12%;
    top: 10%;
    transform: perspective(900px) rotateY(30deg) rotateZ(5deg);
    opacity: 0.24;
}

.hero-mockup-iframe {
    position: relative;
    z-index: 1;
    height: clamp(30rem, 66svh, 48rem);
    max-width: min(92vw, 37rem);
    border-radius: 2rem;
    filter:
        drop-shadow(0 3rem 4rem rgba(0, 0, 0, 0.72))
        drop-shadow(0 0 3rem rgba(142, 201, 255, 0.12));
    transform: translateY(-0.25rem) rotate(-2deg);
}

.hero-mockup-iframe:hover {
    transform: translateY(-0.5rem) rotate(-2deg);
}

.hero-content {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
    max-width: none;
    display: grid;
    grid-template-columns: minmax(0, 46rem) minmax(11rem, auto);
    grid-template-areas:
        "eyebrow ctas"
        "title ctas"
        "subtitle ctas";
    align-items: end;
    column-gap: 2rem;
    row-gap: 0.7rem;
    animation: fadeInRise 1.1s var(--transition-timing-function-cubic) 0.1s backwards;
}

.hero-badge,
.hero-metrics,
.hero-caption {
    display: none;
}

.hero-eyebrow {
    grid-area: eyebrow;
    margin: 0;
    color: #f5f5f7;
    font-size: 1.08rem;
    font-weight: 700;
}

.hero-title {
    grid-area: title;
    max-width: 48rem;
    margin: 0;
    font-family: var(--font-family-primary);
    font-size: 4.85rem;
    font-weight: 800;
    line-height: 1.02;
    color: transparent;
    background: linear-gradient(92deg, #e9ffff 0%, #9ad8e3 42%, #446f8f 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

.hero-subtitle {
    grid-area: subtitle;
    max-width: 42rem;
    margin: 0;
    color: rgba(245, 245, 247, 0.88);
    font-size: 1.16rem;
    font-weight: 700;
    line-height: 1.42;
}

.hero-ctas {
    grid-area: ctas;
    justify-self: end;
    align-self: end;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin: 0 0 0.3rem;
}

.hero-ctas .button-primary {
    background: #0071e3;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 18px 42px rgba(0, 113, 227, 0.26);
}

.hero-ctas .button-secondary {
    color: #2997ff;
    background: transparent;
    border-color: transparent;
}

.hero-ctas .button-secondary:hover {
    background: rgba(41, 151, 255, 0.12);
}

.product-strip {
    background: #050505;
    border-top-color: rgba(255, 255, 255, 0.08);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.product-strip-item,
.product-strip-item:last-child {
    border-color: rgba(255, 255, 255, 0.08);
}

.product-strip-item span {
    color: rgba(245, 245, 247, 0.52);
}

.product-strip-item strong {
    color: #f5f5f7;
}

@media (max-width: 1100px) {
    .product-hero {
        grid-template-rows: minmax(25rem, auto) auto;
        padding-bottom: 3.5rem;
        text-align: left;
    }

    .hero-content {
        grid-template-columns: 1fr;
        grid-template-areas:
            "eyebrow"
            "title"
            "subtitle"
            "ctas";
        justify-items: start;
        max-width: 44rem;
        margin: 0;
    }

    .hero-title,
    .hero-subtitle {
        text-align: left;
    }

    .hero-title {
        font-size: 4rem;
    }

    .hero-ctas {
        justify-self: start;
        margin-top: 0.6rem;
    }

    .hero-device-frame {
        min-height: 34rem;
    }

    .hero-mockup-iframe {
        height: 35rem;
    }
}

@media (max-width: 768px) {
    .primary-navigation-container {
        background: #050505;
        border-bottom-color: rgba(255, 255, 255, 0.1);
    }

    .product-hero {
        min-height: calc(100svh - var(--nav-height));
        grid-template-rows: minmax(0, 1fr) auto;
        padding: 0 1.25rem clamp(1.5rem, 4svh, 2.25rem);
    }

    .hero-visual {
        min-height: 0;
        height: 100%;
        padding-top: 0;
        overflow: visible;
    }

    .hero-content {
        row-gap: 0.45rem;
    }

    .hero-device-frame {
        position: relative;
        width: 100%;
        height: 100%;
        min-height: 0;
        overflow: visible;
    }

    .hero-device-frame::before,
    .hero-device-frame::after {
        display: none;
    }

    .hero-mockup-iframe {
        position: absolute;
        top: 50%;
        left: 50%;
        width: 420px;
        height: 620px;
        max-width: none;
        transform: translate(-50%, -50%) scale(0.57) rotate(-1deg);
        transform-origin: center;
    }

    .hero-mockup-iframe:hover {
        transform: translate(-50%, -50%) scale(0.57) rotate(-1deg);
    }

    .hero-title {
        font-size: 3.05rem;
        line-height: 1.04;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-ctas {
        width: 100%;
        max-width: none;
        align-items: stretch;
        gap: 0.45rem;
        margin-top: 0.35rem;
    }

    .hero-ctas .button {
        min-height: 40px;
        padding: 0.65rem 1rem;
        width: auto;
    }

    .hero-ctas .button-secondary {
        min-height: 32px;
        padding: 0.35rem 1rem;
    }
}

@media (max-width: 520px) {
    .product-hero {
        min-height: calc(100svh - var(--nav-height));
        grid-template-rows: minmax(0, 1fr) auto;
        padding-bottom: clamp(1.35rem, 3.4svh, 1.9rem);
    }

    .hero-visual,
    .hero-device-frame {
        height: 100%;
        min-height: 0;
    }

    .hero-content {
        row-gap: 0.35rem;
    }

    .hero-mockup-iframe {
        transform: translate(-50%, -50%) scale(0.54) rotate(-1deg);
    }

    .hero-mockup-iframe:hover {
        transform: translate(-50%, -50%) scale(0.54) rotate(-1deg);
    }

    .hero-title {
        font-size: 2.55rem;
    }

    .hero-ctas {
        flex-direction: column;
    }

    .hero-ctas .button {
        width: 100%;
    }
}

@media (max-width: 390px) {
    .product-hero {
        grid-template-rows: minmax(0, 1fr) auto;
    }

    .hero-visual,
    .hero-device-frame {
        height: 100%;
        min-height: 0;
    }

    .hero-mockup-iframe {
        transform: translate(-50%, -50%) scale(0.49) rotate(-1deg);
    }

    .hero-mockup-iframe:hover {
        transform: translate(-50%, -50%) scale(0.49) rotate(-1deg);
    }
}

/* ============================================== */
/* == Feature Highlights Rail == */
/* ============================================== */

.product-features.feature-highlights {
    width: 100%;
    margin: 0;
    padding: 6.5rem 0 7rem;
    overflow: hidden;
    background: #f5f5f7;
}

.feature-highlights-header {
    max-width: 1520px;
    margin: 0 auto 3rem;
    padding: 0 max(1.5rem, calc((100vw - 1520px) / 2 + 1.5rem));
}

.feature-highlights-title {
    margin: 0;
    color: #173d5c;
    font-size: 3.35rem;
    font-weight: 800;
    line-height: 1.05;
}

.feature-highlights-title span {
    color: transparent;
    background: linear-gradient(90deg, #17415f 0%, #6b9abb 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

.feature-highlights-subtitle {
    max-width: 40rem;
    margin: 0.9rem 0 0;
    color: #6e6e73;
    font-size: 1.05rem;
    font-weight: 600;
}

.feature-carousel-shell {
    width: 100%;
}

.feature-carousel {
    display: flex !important;
    flex-wrap: nowrap !important;
    justify-content: flex-start !important;
    gap: 1.25rem;
    width: 100%;
    margin: 0;
    padding: 0 max(1.5rem, calc((100vw - 1520px) / 2 + 1.5rem)) 3.2rem;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-padding-inline: max(1.5rem, calc((100vw - 1520px) / 2 + 1.5rem));
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
}

.feature-carousel::-webkit-scrollbar {
    display: none;
}

.highlight-card {
    position: relative;
    flex: 0 0 clamp(24rem, 37vw, 42rem);
    min-width: 0;
    min-height: 28.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem;
    overflow: hidden;
    scroll-snap-align: start;
    background: #ffffff;
    border: 0;
    border-radius: 8px;
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.06);
    transition: transform 320ms ease, box-shadow 320ms ease;
}

.highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 22px 70px rgba(0, 0, 0, 0.1);
}

.highlight-card--calm,
.highlight-card--dark {
    flex-basis: clamp(30rem, 41vw, 44rem);
}

.highlight-card--dark {
    color: #f5f5f7;
    background:
        linear-gradient(180deg, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.62)),
        radial-gradient(circle at 70% 18%, rgba(140, 214, 255, 0.28), transparent 30%),
        linear-gradient(135deg, #202326 0%, #0a0b0c 100%);
}

.highlight-card--blue {
    background:
        radial-gradient(circle at 86% 42%, rgba(0, 113, 227, 0.42), transparent 34%),
        linear-gradient(135deg, #d8ebfb 0%, #f9fbff 54%, #b2d0eb 100%);
}

.highlight-card--light {
    background:
        radial-gradient(circle at 72% 64%, rgba(52, 199, 89, 0.2), transparent 34%),
        linear-gradient(135deg, #ffffff 0%, #eef7ef 100%);
}

.highlight-card--magnet {
    background:
        radial-gradient(circle at 70% 50%, rgba(255, 59, 48, 0.18), transparent 32%),
        linear-gradient(135deg, #ffffff 0%, #f6eef0 100%);
}

.highlight-card--widgets {
    background:
        radial-gradient(circle at 78% 32%, rgba(88, 86, 214, 0.22), transparent 30%),
        linear-gradient(135deg, #ffffff 0%, #f2f1ff 100%);
}

.highlight-copy {
    position: relative;
    z-index: 2;
    max-width: 25rem;
}

.highlight-kicker {
    margin: 0 0 0.65rem;
    color: #6e6e73;
    font-size: 0.82rem;
    font-weight: 800;
}

.highlight-card--dark .highlight-kicker,
.highlight-card--dark .highlight-copy p {
    color: rgba(245, 245, 247, 0.78);
}

.highlight-copy h3 {
    margin: 0;
    color: #1d1d1f;
    font-size: 1.55rem;
    font-weight: 800;
    line-height: 1.16;
}

.highlight-card--dark .highlight-copy h3 {
    color: #ffffff;
}

.highlight-copy p:last-child {
    margin: 0.75rem 0 0;
    color: #6e6e73;
    font-size: 0.98rem;
    font-weight: 600;
    line-height: 1.45;
}

.highlight-art {
    position: absolute;
    inset: auto 2rem 2.2rem auto;
    z-index: 1;
    width: min(38%, 14rem);
    aspect-ratio: 1;
    display: grid;
    place-items: center;
}

.highlight-glyph {
    display: inline-grid;
    place-items: center;
    color: #1d7768;
    font-size: clamp(5.5rem, 9vw, 8.5rem);
    line-height: 1;
    filter: drop-shadow(0 22px 26px rgba(0, 0, 0, 0.16));
}

.highlight-art::before,
.highlight-art::after {
    display: none;
}

.highlight-art--eye .highlight-glyph {
    color: #9ad8e3;
    filter: drop-shadow(0 22px 34px rgba(154, 216, 227, 0.2));
}

.highlight-art--updates .highlight-glyph {
    color: #2877c7;
    filter: drop-shadow(0 22px 34px rgba(40, 119, 199, 0.24));
}

.highlight-art--battery .highlight-glyph {
    color: #2f8f58;
    filter: drop-shadow(0 22px 34px rgba(47, 143, 88, 0.22));
}

.highlight-art--magnet .highlight-glyph {
    color: #cb3b34;
    filter: drop-shadow(0 22px 34px rgba(203, 59, 52, 0.2));
}

.highlight-art--widgets .highlight-glyph {
    color: #5e5ce6;
    filter: drop-shadow(0 22px 34px rgba(94, 92, 230, 0.22));
}

.feature-carousel-controls {
    max-width: 1520px;
    margin: 0 auto;
    padding: 0 max(1.5rem, calc((100vw - 1520px) / 2 + 1.5rem));
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
}

.feature-carousel-button {
    width: 2.75rem;
    height: 2.75rem;
    display: inline-grid;
    place-items: center;
    border: 0;
    border-radius: 50%;
    color: #4d4d50;
    background: #e8e8ed;
    cursor: pointer;
    transition: background 180ms ease, color 180ms ease, transform 180ms ease, opacity 180ms ease;
}

.feature-carousel-button:hover {
    color: #1d1d1f;
    background: #dadbe1;
    transform: translateY(-1px);
}

.feature-carousel-button:disabled {
    cursor: default;
    opacity: 0.38;
    transform: none;
}

@media (max-width: 900px) {
    .product-features.feature-highlights {
        padding: 4.8rem 0 5.4rem;
    }

    .feature-highlights-header {
        margin-bottom: 2rem;
    }

    .feature-highlights-title {
        font-size: 2.55rem;
    }

    .highlight-card,
    .highlight-card--calm,
    .highlight-card--dark {
        flex-basis: min(82vw, 31rem);
        min-height: 27rem;
    }
}

@media (max-width: 560px) {
    .feature-highlights-title {
        font-size: 2.15rem;
    }

    .feature-highlights-subtitle {
        font-size: 0.95rem;
    }

    .feature-carousel {
        gap: 0.9rem;
        padding-bottom: 2rem;
    }

    .highlight-card,
    .highlight-card--calm,
    .highlight-card--dark {
        flex-basis: calc(100vw - 2.5rem);
        min-height: 25rem;
        padding: 1.45rem;
    }

    .highlight-copy h3 {
        font-size: 1.32rem;
    }

    .highlight-art {
        right: 1.2rem;
        bottom: 1.2rem;
        width: 44%;
    }

    .highlight-glyph {
        font-size: 4.8rem;
    }

    .feature-carousel-controls {
        justify-content: center;
    }
}