/* ===================================================
   Product Showcase — Design System
   Zero-dependency, config-driven landing page
   =================================================== */

/* --- Design Tokens --- */
:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Typography */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Borders */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.35s ease;

    /* Layout */
    --container-max: 1200px;
    --header-height: 64px;
}

/* --- Light Theme --- */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fc;
    --bg-tertiary: #f0f2f7;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f9fc;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;

    --border-primary: #e2e8f0;
    --border-light: #f1f5f9;

    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-light: rgba(99, 102, 241, 0.08);
    --accent-border: rgba(99, 102, 241, 0.2);

    --gradient-start: #6366f1;
    --gradient-mid: #8b5cf6;
    --gradient-end: #a855f7;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);

    --hero-bg: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 60%);
    --section-alt-bg: #f8f9fc;

    --tag-bg: #eef2ff;
    --tag-text: #4f46e5;
    --tag-latest-bg: #dcfce7;
    --tag-latest-text: #16a34a;

    --demo-card-bg: #ffffff;
    --pricing-highlight-bg: linear-gradient(135deg, #6366f1, #8b5cf6);
}

/* --- Dark Theme --- */
[data-theme="dark"] {
    --bg-primary: #0b0f1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1e2433;
    --bg-card: #151b2b;
    --bg-card-hover: #1a2238;

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;

    --border-primary: #1e293b;
    --border-light: #1e293b;

    --accent: #818cf8;
    --accent-hover: #6366f1;
    --accent-light: rgba(129, 140, 248, 0.1);
    --accent-border: rgba(129, 140, 248, 0.2);

    --gradient-start: #818cf8;
    --gradient-mid: #a78bfa;
    --gradient-end: #c084fc;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.6);

    --hero-bg: radial-gradient(ellipse at 50% 0%, rgba(129, 140, 248, 0.1) 0%, transparent 60%);
    --section-alt-bg: #0f1525;

    --tag-bg: #1e1b4b;
    --tag-text: #a5b4fc;
    --tag-latest-bg: #14532d;
    --tag-latest-text: #4ade80;

    --demo-card-bg: #151b2b;
    --pricing-highlight-bg: linear-gradient(135deg, #6366f1, #7c3aed);
}

/* Theme icon toggling */
[data-theme="light"] .icon-sun {
    display: none;
}

[data-theme="dark"] .icon-moon {
    display: none;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + var(--space-8));
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: var(--text-sm);
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--space-3) var(--space-6);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    color: #fff;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-primary);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

/* --- Section Standards --- */
.section {
    padding: var(--space-24) 0;
}

.section:nth-child(even) {
    background: var(--section-alt-bg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-badge {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    background: var(--accent-light);
    border: 1px solid var(--accent-border);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ===================================================
   1. HEADER (Sticky + Glassmorphism)
   =================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

[data-theme="dark"] .header {
    background: rgba(11, 15, 26, 0.8);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    height: 100%;
    gap: var(--space-8);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: var(--text-lg);
    flex-shrink: 0;
}

.header-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.header-logo img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-left: auto;
}

.header-nav a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.header-nav a:hover {
    color: var(--text-primary);
    background: var(--accent-light);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header-cta {
    display: inline-flex;
    align-items: center;
    font-size: var(--text-sm);
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.header-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.theme-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.mobile-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
}

/* Mobile Nav Dropdown */
.mobile-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    padding: var(--space-4);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    gap: var(--space-1);
}

.mobile-nav.open {
    display: flex;
}

.mobile-nav a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mobile-nav a:hover {
    background: var(--accent-light);
    color: var(--accent);
}

/* ===================================================
   2. HERO
   =================================================== */
.hero {
    position: relative;
    padding: calc(var(--header-height) + var(--space-20)) 0 var(--space-16);
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: var(--hero-bg);
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.hero-glow-1 {
    width: 500px;
    height: 500px;
    background: var(--gradient-start);
    top: -150px;
    left: 10%;
    opacity: 0.15;
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-end);
    top: -100px;
    right: 10%;
    opacity: 0.1;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.4;
    mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center top, black 30%, transparent 70%);
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-light);
    border: 1px solid var(--accent-border);
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-8);
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    font-size: var(--text-6xl);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.6s ease 0.1s both;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto var(--space-10);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-ctas {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    animation: fadeInUp 0.6s ease 0.3s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================================
   3. TECH STACK
   =================================================== */
.tech-stack {
    padding: var(--space-12) 0;
    border-bottom: 1px solid var(--border-light);
}

.tech-label {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
    margin-bottom: var(--space-8);
}

.tech-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-10);
    flex-wrap: wrap;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

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

.tech-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.tech-item:hover .tech-icon {
    opacity: 1;
}

/* ===================================================
   4. HIGHLIGHTS (Stats)
   =================================================== */
.highlights {
    padding: var(--space-16) 0;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

.highlight-card {
    text-align: center;
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    transition: all var(--transition-base);
}

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

.highlight-value {
    font-size: var(--text-4xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-2);
}

.highlight-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===================================================
   5. FEATURES GRID
   =================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.feature-card {
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--accent-light);
    border: 1px solid var(--accent-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: var(--space-5);
}

.feature-title {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-3);
    letter-spacing: -0.01em;
}

.feature-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================================
   6. SCREENSHOTS
   =================================================== */
.screenshots-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
}

.screenshot-tab {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-5);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.screenshot-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.screenshot-tab.active {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    color: #fff;
    border-color: transparent;
}

.screenshots-viewer {
    position: relative;
    max-width: 960px;
    margin: 0 auto;
}

.screenshot-frame {
    display: none;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-xl);
    background: var(--bg-tertiary);
    aspect-ratio: 16 / 9;
    animation: fadeInUp 0.4s ease;
}

.screenshot-frame.active {
    display: block;
}

.screenshot-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.screenshot-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    color: var(--text-tertiary);
    font-size: var(--text-lg);
    font-weight: 600;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.screenshot-placeholder svg {
    opacity: 0.3;
}

/* ===================================================
   7. DEMO CARDS
   =================================================== */
.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    max-width: 960px;
    margin: 0 auto;
}

.demo-card {
    background: var(--demo-card-bg);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.demo-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--accent-light);
    border: 1px solid var(--accent-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: var(--space-5);
}

.demo-title {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.demo-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-5);
}

.demo-creds {
    width: 100%;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-5);
    font-size: var(--text-xs);
    color: var(--text-secondary);
    text-align: left;
}

.demo-creds strong {
    color: var(--text-primary);
}

.demo-cta {
    margin-top: auto;
}

/* ===================================================
   8. REQUIREMENTS
   =================================================== */
.req-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-8);
    max-width: 900px;
    margin: 0 auto;
}

.req-table-wrap {
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.req-table {
    width: 100%;
    border-collapse: collapse;
}

.req-table th {
    background: var(--bg-tertiary);
    text-align: left;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-primary);
}

.req-table td {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

.req-table tr:last-child td {
    border-bottom: none;
}

.req-extensions {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

.req-ext-title {
    font-size: var(--text-sm);
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.req-ext-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.req-ext-tag {
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--tag-text);
    background: var(--tag-bg);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
}

/* ===================================================
   9. CHANGELOG
   =================================================== */
.changelog-timeline {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    max-height: 500px;
    overflow-y: auto;
    padding-right: var(--space-4);
}

.changelog-timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-primary);
}

.changelog-entry {
    position: relative;
    padding-left: var(--space-12);
    margin-bottom: var(--space-10);
}

.changelog-entry:last-child {
    margin-bottom: 0;
}

.changelog-dot {
    position: absolute;
    left: 9px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 3px solid var(--accent);
    z-index: 1;
}

.changelog-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.changelog-version {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.changelog-tag {
    font-size: var(--text-xs);
    font-weight: 600;
    padding: 1px 8px;
    border-radius: var(--radius-full);
    background: var(--tag-latest-bg);
    color: var(--tag-latest-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.changelog-date {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.changelog-changes {
    list-style: none;
    padding: 0;
}

.changelog-changes li {
    position: relative;
    padding-left: var(--space-5);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
    line-height: 1.6;
}

.changelog-changes li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

/* ===================================================
   10. TESTIMONIALS
   =================================================== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.testimonial-stars {
    display: flex;
    gap: 2px;
    margin-bottom: var(--space-4);
    color: #f59e0b;
}

.testimonial-text {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.testimonial-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.testimonial-role {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* ===================================================
   11. PRICING
   =================================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 1.5px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.highlighted {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-light), var(--shadow-lg);
}

.pricing-popular {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--text-xs);
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    padding: var(--space-1) var(--space-5);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.pricing-name {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.pricing-amount {
    font-size: var(--text-5xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-period {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.pricing-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.6;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin-bottom: var(--space-8);
    flex: 1;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.pricing-check {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
}

/* ===================================================
   12. FAQ ACCORDION
   =================================================== */
.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-3);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--accent-border);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    width: 100%;
    padding: var(--space-5) var(--space-6);
    background: transparent;
    border: none;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--accent-light);
}

.faq-chevron {
    margin-left: auto;
    color: var(--text-tertiary);
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.faq-item.open .faq-chevron {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 var(--space-6) var(--space-5) var(--space-6);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================================
   13. SUPPORT
   =================================================== */
.support-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    max-width: 900px;
    margin: 0 auto;
}

.support-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.support-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--accent-light);
    border: 1px solid var(--accent-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: var(--space-4);
}

.support-title {
    font-size: var(--text-base);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.support-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ===================================================
   14. FOOTER
   =================================================== */
.footer {
    padding: var(--space-12) 0 var(--space-8);
    border-top: 1px solid var(--border-primary);
}

.footer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--space-6);
    gap: var(--space-8);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    gap: var(--space-6);
}

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

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

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.footer-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    border: 1px solid var(--border-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.footer-social-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-light);
}

.footer-bottom {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* ===================================================
   BACK TO TOP
   =================================================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    z-index: 50;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

/* ===================================================
   SCROLL ANIMATIONS (Fade In)
   =================================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .section-title {
        font-size: var(--text-3xl);
    }

    .hero-title {
        font-size: var(--text-4xl);
    }
}

@media (max-width: 768px) {
    .header-nav {
        display: none;
    }

    .header-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-12);
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }

    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }

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

    .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .demo-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .support-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .req-content {
        grid-template-columns: 1fr;
    }

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

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .section {
        padding: var(--space-16) 0;
    }

    .section-header {
        margin-bottom: var(--space-10);
    }

    .tech-logos {
        gap: var(--space-6);
    }
}

@media (max-width: 480px) {
    .highlights-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .section-title {
        font-size: var(--text-2xl);
    }

    .hero-title {
        font-size: var(--text-2xl);
    }
}