/* ==================== CSS RESET & BASE ==================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

/* ==================== DARK THEME VARIABLES (DEFAULT) ==================== */
:root {
    /* Brand */
    --brand-teal: #0097b2;
    --brand-green: #7ed952;
    --brand-gradient: linear-gradient(135deg, #0097b2, #7ed952);
    --brand-gradient-hover: linear-gradient(135deg, #00b8d4, #8ee765);

    /* Background */
    --bg-primary: #0a0e14;
    --bg-secondary: #121820;
    --bg-elevated: #161d28;
    --bg-hover: #1a2536;

    /* Text */
    --text-primary: #e8edf2;
    --text-secondary: #a8b5c8;
    --text-disabled: #475569;

    /* Glass */
    --glass-bg: rgba(20, 30, 45, 0.7);
    --glass-bg-hover: rgba(25, 38, 55, 0.8);
    --glass-border: rgba(0, 151, 178, 0.12);
    --glass-border-hover: rgba(0, 151, 178, 0.25);
    --glass-blur: blur(12px);
    --glass-blur-heavy: blur(20px);

    /* Border */
    --border-color: rgba(0, 151, 178, 0.15);

    /* Shadows — tuned for dark bg */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.5), 0 2px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.6), 0 6px 12px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 24px 40px -8px rgba(0, 0, 0, 0.7), 0 12px 20px -4px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 151, 178, 0.35), 0 4px 12px rgba(0, 0, 0, 0.4);

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Typography */
    --font-heading: "Poppins", sans-serif;
    --font-body: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* ---- Backward-Compatible Aliases ---- */
    /* (used by privacy.html, terms.html, support.html) */
    --bg-white: var(--bg-primary);
    --bg-gray-50: var(--bg-secondary);
    --bg-gray-100: var(--bg-elevated);
    --bg-gray-200: var(--bg-hover);
    --text-dark: var(--text-primary);
    --text-medium: var(--text-secondary);
    --text-light: var(--text-secondary);
    --border-gray: var(--border-color);
    --primary-blue: var(--brand-teal);
    --primary-blue-dark: #00889e;
    --primary-blue-light: #33b5cb;
    --gradient-primary: var(--brand-gradient);
    --gradient-hero: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    --success-green: #16a34a;
    --font-system: var(--font-body);
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;
}

/* ==================== LIGHT THEME — SYSTEM PREFERENCE ==================== */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        /* Background */
        --bg-primary: #ffffff;
        --bg-secondary: #f4f7f9;
        --bg-elevated: #ffffff;
        --bg-hover: #e9eff3;

        /* Text */
        --text-primary: #1a2332;
        --text-secondary: #5f6d7e;
        --text-disabled: #9eacba;

        /* Glass */
        --glass-bg: rgba(240, 245, 250, 0.85);
        --glass-bg-hover: rgba(235, 242, 248, 0.95);
        --glass-border: rgba(0, 151, 178, 0.18);
        --glass-border-hover: rgba(0, 151, 178, 0.35);

        /* Border */
        --border-color: rgba(0, 151, 178, 0.2);

        /* Shadows — tuned for light bg */
        --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
        --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.12), 0 2px 6px -1px rgba(0, 0, 0, 0.06);
        --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.14), 0 6px 12px -2px rgba(0, 0, 0, 0.08);
        --shadow-xl: 0 24px 40px -8px rgba(0, 0, 0, 0.16), 0 12px 20px -4px rgba(0, 0, 0, 0.1);
        --shadow-glow: 0 0 20px rgba(0, 151, 178, 0.2), 0 4px 12px rgba(0, 0, 0, 0.08);

        /* Backward compat override */
        --bg-white: #ffffff;
        --bg-gray-50: #f4f7f9;
        --bg-gray-100: #eaf0f5;
        --bg-gray-200: #e9eff3;
        --gradient-hero: linear-gradient(180deg, #ffffff 0%, #f4f7f9 100%);
    }
}

/* ==================== LIGHT THEME — MANUAL TOGGLE ==================== */
[data-theme="light"] {
    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f4f7f9;
    --bg-elevated: #ffffff;
    --bg-hover: #e9eff3;

    /* Text */
    --text-primary: #1a2332;
    --text-secondary: #5f6d7e;
    --text-disabled: #9eacba;

    /* Glass */
    --glass-bg: rgba(240, 245, 250, 0.85);
    --glass-bg-hover: rgba(235, 242, 248, 0.95);
    --glass-border: rgba(0, 151, 178, 0.18);
    --glass-border-hover: rgba(0, 151, 178, 0.35);

    /* Border */
    --border-color: rgba(0, 151, 178, 0.2);

    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.12), 0 2px 6px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.14), 0 6px 12px -2px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 24px 40px -8px rgba(0, 0, 0, 0.16), 0 12px 20px -4px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 151, 178, 0.2), 0 4px 12px rgba(0, 0, 0, 0.08);

    /* Backward compat override */
    --bg-white: #ffffff;
    --bg-gray-50: #f4f7f9;
    --bg-gray-100: #eaf0f5;
    --bg-gray-200: #e9eff3;
    --gradient-hero: linear-gradient(180deg, #ffffff 0%, #f4f7f9 100%);
}

/* ==================== DARK THEME — MANUAL TOGGLE ==================== */
[data-theme="dark"] {
    /* Background */
    --bg-primary: #0a0e14;
    --bg-secondary: #121820;
    --bg-elevated: #161d28;
    --bg-hover: #1a2536;

    /* Text */
    --text-primary: #e8edf2;
    --text-secondary: #a8b5c8;
    --text-disabled: #475569;

    /* Glass */
    --glass-bg: rgba(20, 30, 45, 0.7);
    --glass-bg-hover: rgba(25, 38, 55, 0.8);
    --glass-border: rgba(0, 151, 178, 0.12);
    --glass-border-hover: rgba(0, 151, 178, 0.25);

    /* Border */
    --border-color: rgba(0, 151, 178, 0.15);

    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.5), 0 2px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.6), 0 6px 12px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 24px 40px -8px rgba(0, 0, 0, 0.7), 0 12px 20px -4px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 151, 178, 0.35), 0 4px 12px rgba(0, 0, 0, 0.4);

    /* Backward compat override */
    --bg-white: #0a0e14;
    --bg-gray-50: #121820;
    --bg-gray-100: #161d28;
    --bg-gray-200: #1a2536;
    --gradient-hero: linear-gradient(180deg, #0a0e14 0%, #121820 100%);
}

/* ==================== BASE STYLES ==================== */
body {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

a {
    color: var(--brand-teal);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-blue-light);
}

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

/* ==================== CONTAINER ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ==================== GLASS CARD BASE PATTERN ==================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ==================== NAVIGATION ==================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
    gap: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    flex-shrink: 0;
}

.logo:hover {
    color: var(--text-primary);
}

.logo-svg {
    height: 48px;
    width: auto;
    transition: transform var(--transition-fast);
}

.logo:hover .logo-svg {
    transform: scale(1.05);
}

.logo-text {
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

.nav-links a:hover {
    color: var(--brand-teal);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* ==================== THEME TOGGLE BUTTON ==================== */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.125rem;
    transition: all var(--transition-base);
    flex-shrink: 0;
    padding: 0;
    line-height: 1;
}

.theme-toggle:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    color: var(--brand-teal);
    transform: scale(1.1);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--brand-teal);
    outline-offset: 3px;
}

/* Theme icons: only show the active one */
.theme-icon {
    display: none;
}

.theme-icon.active {
    display: block;
}

/* Nav CTA button */
.nav-cta {
    font-size: 0.875rem;
    padding: 0.5rem 1.25rem;
}

/* Nav scrolled state */
.nav-scrolled {
    background: var(--glass-bg-hover);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--glass-border-hover);
}

/* ==================== BUTTONS ==================== */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    white-space: nowrap;
    line-height: 1;
}

.btn-primary {
    background: var(--brand-gradient);
    color: #ffffff;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--brand-gradient-hover);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    color: var(--brand-teal);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: var(--radius-xl);
}

.arrow {
    display: inline-block;
    transition: transform var(--transition-base);
}

.btn-primary:hover .arrow,
.btn-secondary:hover .arrow {
    transform: translateX(4px);
}

/* ==================== GRADIENT TEXT UTILITY ==================== */
.gradient-text {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== SECTION SHARED STYLES ==================== */
.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--space-2xl);
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* ==================== HERO SECTION ==================== */
.hero {
    padding: calc(80px + var(--space-3xl)) var(--space-lg) var(--space-3xl);
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 0%, rgba(0, 151, 178, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(126, 217, 82, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.08;
    margin-bottom: var(--space-md);
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(1.0625rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-md);
}

.hero-note {
    color: var(--text-disabled);
    font-size: 0.875rem;
    letter-spacing: 0.01em;
}

/* ==================== STATS SECTION ==================== */
.stats {
    background: var(--bg-secondary);
    padding: var(--space-2xl) var(--space-lg);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    text-align: center;
}

.stat {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl) var(--space-lg);
    transition: all var(--transition-base);
}

.stat:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
}

/* ==================== FEATURES SECTION ==================== */
.features {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    line-height: 1;
    color: var(--brand-teal);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ==================== SCREENSHOTS SECTION ==================== */
.screenshots {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-secondary);
    overflow: hidden;
}

.screenshot-gallery {
    display: flex;
    gap: var(--space-lg);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--glass-border-hover) transparent;
    padding-bottom: var(--space-sm);
    cursor: grab;
}

.screenshot-gallery:active {
    cursor: grabbing;
}

.screenshot-gallery::-webkit-scrollbar {
    height: 4px;
}

.screenshot-gallery::-webkit-scrollbar-track {
    background: transparent;
}

.screenshot-gallery::-webkit-scrollbar-thumb {
    background: var(--glass-border-hover);
    border-radius: 4px;
}

.screenshot-card {
    scroll-snap-align: center;
    flex-shrink: 0;
    width: clamp(260px, 70vw, 360px);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.screenshot-card figure {
    margin: 0;
    cursor: pointer;
}

.screenshot-frame {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-height: 520px;
    transition: all var(--transition-base);
}

.screenshot-frame:hover {
    border-color: var(--glass-border-hover);
    box-shadow: var(--shadow-xl), 0 0 0 1px var(--glass-border-hover);
    transform: translateY(-3px);
}

.screenshot-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
}

.screenshot-card figcaption {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0 var(--space-xs);
}

/* Desktop: grid layout */
@media (min-width: 769px) {
    .screenshot-gallery {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        overflow-x: visible;
        scroll-snap-type: none;
        cursor: default;
    }

    .screenshot-gallery:active {
        cursor: default;
    }

    .screenshot-card {
        width: auto;
        flex-shrink: unset;
    }
}

@media (min-width: 1100px) {
    .screenshot-gallery {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ==================== LIGHTBOX OVERLAY ==================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.88);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.lightbox[hidden] {
    display: none;
}

body.lightbox-open {
    overflow: hidden;
}

.lightbox-img {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-xl);
}

.lightbox-close {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    line-height: 1;
    padding: 0;
    z-index: 10000;
}

.lightbox-close:hover {
    background: var(--brand-gradient);
    border-color: transparent;
    color: #ffffff;
    transform: scale(1.1);
}

/* ==================== HOW IT WORKS SECTION ==================== */
.how-it-works {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-primary);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    flex: 1;
    min-width: 240px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.step:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--brand-gradient);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0, 151, 178, 0.3);
}

.step-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

.step-arrow {
    font-size: 1.75rem;
    color: var(--text-disabled);
    flex-shrink: 0;
    align-self: center;
    line-height: 1;
}

/* ==================== INTEGRATIONS SECTION ==================== */
.integrations {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-secondary);
}

.integrations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-lg);
}

.integration-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.integration-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.integration-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    line-height: 1;
}

.integration-card h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.integration-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 0.9375rem;
}

.integration-badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--bg-hover);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 600;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-fast);
}

.integration-badge.badge-available {
    background: rgba(22, 163, 74, 0.12);
    color: #4ade80;
    border-color: rgba(22, 163, 74, 0.25);
}

[data-theme="light"] .integration-badge.badge-available {
    color: #16a34a;
    background: rgba(22, 163, 74, 0.08);
    border-color: rgba(22, 163, 74, 0.2);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .integration-badge.badge-available {
        color: #16a34a;
        background: rgba(22, 163, 74, 0.08);
        border-color: rgba(22, 163, 74, 0.2);
    }
}

.integration-badge.coming-soon {
    background: rgba(0, 151, 178, 0.1);
    color: var(--brand-teal);
    border-color: rgba(0, 151, 178, 0.2);
}

/* ==================== USE CASES SECTION ==================== */
.use-cases {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-primary);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-xl);
}

.use-case {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.use-case:hover {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transform: translateY(-2px);
}

.use-case h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.use-case p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ==================== CTA SECTION ==================== */
.cta {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--brand-gradient);
    color: #ffffff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 80% at 10% 50%, rgba(255, 255, 255, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse 50% 60% at 90% 30%, rgba(255, 255, 255, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: #ffffff;
    letter-spacing: -0.02em;
}

.cta-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
    opacity: 0.92;
    color: #ffffff;
    line-height: 1.6;
}

.cta-buttons {
    margin-bottom: var(--space-md);
}

.cta .btn-primary {
    background: rgba(255, 255, 255, 0.95);
    color: var(--brand-teal);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.cta .btn-primary:hover {
    background: #ffffff;
    color: #00889e;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
}

.cta-note {
    opacity: 0.78;
    font-size: 0.875rem;
    color: #ffffff;
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: var(--space-xl) var(--space-lg);
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--brand-teal);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--glass-border);
}

.footer-bottom p {
    color: var(--text-disabled);
    font-size: 0.875rem;
}

/* ==================== RESPONSIVE — 768px ==================== */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-md);
    }

    .nav-links {
        display: none;
    }

    .nav-cta {
        display: none;
    }

    .hero {
        padding: calc(80px + var(--space-xl)) var(--space-md) var(--space-xl);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn-large {
        width: 100%;
        justify-content: center;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .features-grid,
    .integrations-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        flex-direction: column;
        align-items: stretch;
    }

    .step {
        min-width: unset;
    }

    .step-arrow {
        align-self: center;
        transform: rotate(90deg);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }

    .screenshot-gallery {
        grid-template-columns: unset;
    }
}

/* ==================== RESPONSIVE — 480px ==================== */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .hero-title {
        font-size: 2rem;
        letter-spacing: -0.02em;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .cta-title {
        font-size: 1.75rem;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
}

/* ==================== SCROLL REVEAL ANIMATION ==================== */
/* Elements start hidden and are revealed by IntersectionObserver in script.js */
.feature-card,
.integration-card,
.step,
.use-case,
.screenshot-card,
.stat {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.feature-card.visible,
.integration-card.visible,
.step.visible,
.use-case.visible,
.screenshot-card.visible,
.stat.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 8px rgba(0, 151, 178, 0.2), 0 0 24px rgba(0, 151, 178, 0.1);
    }
    50% {
        box-shadow: 0 0 16px rgba(0, 151, 178, 0.4), 0 0 40px rgba(0, 151, 178, 0.2);
    }
}

/* Staggered entrance for feature cards */
.feature-card:nth-child(1) { animation-delay: 0.05s; }
.feature-card:nth-child(2) { animation-delay: 0.12s; }
.feature-card:nth-child(3) { animation-delay: 0.19s; }
.feature-card:nth-child(4) { animation-delay: 0.26s; }
.feature-card:nth-child(5) { animation-delay: 0.33s; }
.feature-card:nth-child(6) { animation-delay: 0.40s; }

/* Shimmer on glass card hover */
.feature-card::after,
.integration-card::after,
.stat::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        105deg,
        transparent 40%,
        rgba(255, 255, 255, 0.04) 50%,
        transparent 60%
    );
    background-size: 200% 100%;
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.feature-card,
.integration-card,
.stat {
    position: relative;
    overflow: hidden;
}

.feature-card:hover::after,
.integration-card:hover::after,
.stat:hover::after {
    opacity: 1;
    animation: shimmer 0.8s ease forwards;
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus-visible styles for keyboard navigation */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--brand-teal);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* Ensure gradient text stays readable at high contrast */
@media (forced-colors: active) {
    .gradient-text {
        -webkit-text-fill-color: ButtonText;
        background: none;
    }

    .btn-primary {
        background: ButtonFace;
        color: ButtonText;
        border: 2px solid ButtonText;
    }

    .glass-card,
    .feature-card,
    .integration-card,
    .stat,
    .step {
        border: 2px solid ButtonText;
        background: Canvas;
    }
}