/* ==========================================================================
   TRANSLATEFLOW - AI Translation Platform
   Premium CSS with Design Tokens
   ========================================================================== */

/* ==========================================================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ========================================================================== */

:root {
    /* Brand Colors - Emerald & Blue */
    --color-primary-50: #ecfdf5;
    --color-primary-100: #d1fae5;
    --color-primary-200: #a7f3d0;
    --color-primary-300: #6ee7b7;
    --color-primary-400: #34d399;
    --color-primary-500: #10b981;
    --color-primary-600: #059669;
    --color-primary-700: #047857;
    --color-primary-800: #065f46;
    --color-primary-900: #064e3b;

    /* Secondary - Soft Blue */
    --color-secondary-50: #eff6ff;
    --color-secondary-100: #dbeafe;
    --color-secondary-200: #bfdbfe;
    --color-secondary-300: #93c5fd;
    --color-secondary-400: #60a5fa;
    --color-secondary-500: #3b82f6;
    --color-secondary-600: #2563eb;
    --color-secondary-700: #1d4ed8;
    --color-secondary-800: #1e40af;
    --color-secondary-900: #1e3a8a;

    /* Neutrals */
    --color-neutral-50: #fafafa;
    --color-neutral-100: #f4f4f5;
    --color-neutral-200: #e4e4e7;
    --color-neutral-300: #d4d4d8;
    --color-neutral-400: #a1a1aa;
    --color-neutral-500: #71717a;
    --color-neutral-600: #52525b;
    --color-neutral-700: #3f3f46;
    --color-neutral-800: #27272a;
    --color-neutral-900: #18181b;
    --color-neutral-950: #09090b;

    /* Semantic Colors */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f4f4f5;
    --bg-inverse: #18181b;

    /* Text Colors */
    --text-primary: #18181b;
    --text-secondary: #52525b;
    --text-tertiary: #71717a;
    --text-inverse: #ffffff;
    --text-muted: #a1a1aa;

    /* Border Colors */
    --border-light: #e4e4e7;
    --border-medium: #d4d4d8;
    --border-dark: #a1a1aa;

    /* Typography Scale (Clamp-based responsive) */
    --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
    --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
    --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
    --text-lg: clamp(1rem, 0.925rem + 0.375vw, 1.125rem);
    --text-xl: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
    --text-2xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --text-3xl: clamp(1.5rem, 1.25rem + 1.25vw, 1.875rem);
    --text-4xl: clamp(1.75rem, 1.4rem + 1.75vw, 2.25rem);
    --text-5xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
    --text-6xl: clamp(2.5rem, 1.75rem + 3.75vw, 3.75rem);
    --text-7xl: clamp(3rem, 2rem + 5vw, 4.5rem);

    /* Font Families */
    --font-sans: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    /* Letter Spacing */
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;

    /* Spacing Scale (8px base) */
    --space-0: 0;
    --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;
    --space-32: 8rem;
    --space-40: 10rem;
    --space-48: 12rem;

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

    /* Glow Effects */
    --glow-primary: 0 0 40px rgba(16, 185, 129, 0.3);
    --glow-primary-lg: 0 0 80px rgba(16, 185, 129, 0.4);
    --glow-secondary: 0 0 40px rgba(59, 130, 246, 0.3);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-smooth: 800ms cubic-bezier(0.16, 1, 0.3, 1);

    /* Z-Index Scale */
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-popover: 60;
    --z-tooltip: 70;

    /* Container */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* ==========================================================================
   DARK MODE TOKENS
   ========================================================================== */

[data-theme="dark"],
.dark {
    --bg-primary: #09090b;
    --bg-secondary: #18181b;
    --bg-tertiary: #27272a;
    --bg-inverse: #ffffff;

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-inverse: #18181b;
    --text-muted: #52525b;

    --border-light: #27272a;
    --border-medium: #3f3f46;
    --border-dark: #52525b;

    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.5);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.6);
}

/* ==========================================================================
   BASE STYLES
   ========================================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: var(--leading-normal);
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    color-scheme: light dark;
}

body {
    min-height: 100vh;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

/* Selection */
::selection {
    background-color: var(--color-primary-500);
    color: white;
}

/* Focus Visible */
:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* Links */
a {
    color: inherit;
    text-decoration: none;
}

/* Images */
img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    color: var(--text-primary);
}

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

/* ==========================================================================
   LAYOUT UTILITIES
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.container-sm {
    max-width: var(--container-md);
}

.container-lg {
    max-width: var(--container-2xl);
}

/* ==========================================================================
   TRANSLATOR INTERFACE STYLES
   ========================================================================== */

.translator-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.translator-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.language-selector {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
}

.language-selector:hover {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.swap-button {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-500);
    color: white;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
}

.swap-button:hover {
    background: var(--color-primary-600);
    transform: rotate(180deg);
}

.translator-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

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

.translator-panel {
    padding: var(--space-6);
    min-height: 200px;
}

.translator-panel:first-child {
    border-right: 1px solid var(--border-light);
}

@media (max-width: 768px) {
    .translator-panel:first-child {
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }
}

.translator-input,
.translator-output {
    width: 100%;
    min-height: 150px;
    border: none;
    outline: none;
    resize: none;
    font-family: var(--font-sans);
    font-size: var(--text-xl);
    line-height: var(--leading-relaxed);
    background: transparent;
    color: var(--text-primary);
}

.translator-input::placeholder {
    color: var(--text-muted);
}

.translator-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.quality-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.quality-dots {
    display: flex;
    gap: var(--space-1);
}

.quality-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--border-medium);
}

.quality-dot.active {
    background: var(--color-primary-500);
}

.quality-dot.partial {
    background: linear-gradient(90deg, var(--color-primary-500) 50%, var(--border-medium) 50%);
}

.action-buttons {
    display: flex;
    gap: var(--space-2);
}

.action-btn {
    padding: var(--space-2) var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: var(--transition-base);
}

.action-btn:hover {
    border-color: var(--color-primary-500);
    color: var(--color-primary-500);
}

/* ==========================================================================
   ALTERNATIVE TRANSLATIONS
   ========================================================================== */

.alternatives-container {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--border-light);
    background: var(--bg-tertiary);
}

.alternatives-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-tertiary);
    margin-bottom: var(--space-3);
}

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

.alternative-item {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-base);
}

.alternative-item:hover {
    border-color: var(--color-secondary-500);
    color: var(--color-secondary-600);
    background: var(--color-secondary-50);
}

.dark .alternative-item:hover {
    background: rgba(59, 130, 246, 0.1);
}

/* ==========================================================================
   DOCUMENT UPLOAD ZONE
   ========================================================================== */

.upload-zone {
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-xl);
    padding: var(--space-12);
    text-align: center;
    background: var(--bg-secondary);
    transition: var(--transition-base);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--color-primary-500);
    background: var(--color-primary-50);
}

.dark .upload-zone:hover,
.dark .upload-zone.drag-over {
    background: rgba(16, 185, 129, 0.1);
}

.upload-zone-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    color: var(--color-primary-500);
}

.upload-zone-text {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.upload-zone-hint {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.supported-formats {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.format-badge {
    padding: var(--space-1) var(--space-2);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--text-tertiary);
    text-transform: uppercase;
}

/* ==========================================================================
   LANGUAGE GRID
   ========================================================================== */

.language-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-4);
}

.language-card {
    padding: var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    cursor: pointer;
}

.language-card:hover {
    border-color: var(--color-primary-500);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.language-flag {
    font-size: 2rem;
    margin-bottom: var(--space-2);
}

.language-name {
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.language-native {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* ==========================================================================
   FEATURE CARDS
   ========================================================================== */

.feature-card {
    padding: var(--space-8);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    transition: var(--transition-base);
}

.feature-card:hover {
    border-color: var(--color-primary-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.dark .feature-card:hover {
    border-color: var(--color-primary-800);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    color: white;
}

.feature-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.feature-description {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

/* ==========================================================================
   PRICING CARDS
   ========================================================================== */

.pricing-card {
    padding: var(--space-8);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    text-align: center;
    transition: var(--transition-base);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.pricing-card.featured {
    border: 2px solid var(--color-primary-500);
    box-shadow: var(--glow-primary);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-1) var(--space-4);
    background: var(--color-primary-500);
    color: white;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
}

.pricing-name {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.pricing-price {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.pricing-period {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--space-6);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--space-8);
    text-align: left;
}

.pricing-feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--border-light);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.pricing-feature:last-child {
    border-bottom: none;
}

.pricing-feature svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary-500);
    flex-shrink: 0;
}

/* ==========================================================================
   COMPARISON TABLE
   ========================================================================== */

.comparison-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: var(--space-4) var(--space-6);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.comparison-table th {
    background: var(--bg-secondary);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    font-size: var(--text-sm);
}

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

.comparison-table .highlight {
    background: var(--color-primary-50);
}

.dark .comparison-table .highlight {
    background: rgba(16, 185, 129, 0.1);
}

.check-icon {
    width: 20px;
    height: 20px;
    color: var(--color-primary-500);
}

.x-icon {
    width: 20px;
    height: 20px;
    color: var(--color-neutral-400);
}

/* ==========================================================================
   STATS SECTION
   ========================================================================== */

.stat-card {
    text-align: center;
    padding: var(--space-8);
}

.stat-value {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--color-primary-500);
    margin-bottom: var(--space-2);
}

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

/* ==========================================================================
   INTEGRATION CARDS
   ========================================================================== */

.integration-card {
    padding: var(--space-6);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: var(--transition-base);
}

.integration-card:hover {
    border-color: var(--color-primary-300);
    box-shadow: var(--shadow-md);
}

.integration-logo {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.integration-name {
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.integration-type {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

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

.btn-primary {
    background: var(--color-primary-500);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
    border-color: var(--color-primary-500);
    color: var(--color-primary-600);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

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

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

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

/* ==========================================================================
   NAVIGATION
   ========================================================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}

.dark .nav {
    background: rgba(9, 9, 11, 0.8);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    padding: 0 var(--space-6);
    max-width: var(--container-xl);
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
}

.nav-logo svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary-500);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.nav-link.active {
    color: var(--color-primary-600);
    background: var(--color-primary-50);
}

.dark .nav-link.active {
    background: rgba(16, 185, 129, 0.1);
}

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

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

@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }

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

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
    padding: var(--space-20) 0 var(--space-8);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: var(--space-12);
    margin-bottom: var(--space-16);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.footer-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.footer-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    margin-bottom: var(--space-4);
}

.footer-links {
    list-style: none;
}

.footer-link {
    display: block;
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: var(--transition-base);
}

.footer-link:hover {
    color: var(--color-primary-500);
}

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

@media (max-width: 640px) {
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

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

.footer-social {
    display: flex;
    gap: var(--space-4);
}

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.footer-social a:hover {
    color: var(--color-primary-500);
    background: var(--bg-tertiary);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero {
    padding-top: calc(72px + var(--space-20));
    padding-bottom: var(--space-20);
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary-50);
    border: 1px solid var(--color-primary-200);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-primary-700);
    margin-bottom: var(--space-6);
}

.dark .hero-badge {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--color-primary-400);
}

.hero-title {
    font-size: var(--text-6xl);
    font-weight: var(--font-bold);
    line-height: 1.1;
    margin-bottom: var(--space-6);
    max-width: 800px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-secondary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--text-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-8);
}

/* ==========================================================================
   SECTIONS
   ========================================================================== */

.section {
    padding: var(--space-24) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-16);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--color-primary-50);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-primary-600);
    margin-bottom: var(--space-4);
}

.dark .section-badge {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-primary-400);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
}

/* ==========================================================================
   FORM ELEMENTS
   ========================================================================== */

.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--text-primary);
    transition: var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ==========================================================================
   BLOG CARDS
   ========================================================================== */

.blog-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-base);
}

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

.blog-card-image {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
}

.blog-card-content {
    padding: var(--space-6);
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.blog-card-category {
    color: var(--color-primary-600);
    font-weight: var(--font-medium);
}

.blog-card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    line-height: var(--leading-snug);
}

.blog-card-excerpt {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

/* ==========================================================================
   TESTIMONIALS
   ========================================================================== */

.testimonial-card {
    padding: var(--space-8);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
}

.testimonial-quote {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

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

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

/* ==========================================================================
   CODE BLOCK (API)
   ========================================================================== */

.code-block {
    background: var(--color-neutral-900);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    background: var(--color-neutral-800);
    border-bottom: 1px solid var(--color-neutral-700);
}

.code-tabs {
    display: flex;
    gap: var(--space-2);
}

.code-tab {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-neutral-400);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.code-tab:hover {
    color: white;
}

.code-tab.active {
    background: var(--color-neutral-700);
    color: white;
}

.code-copy {
    padding: var(--space-1) var(--space-2);
    background: transparent;
    border: 1px solid var(--color-neutral-700);
    border-radius: var(--radius-md);
    color: var(--color-neutral-400);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: var(--transition-base);
}

.code-copy:hover {
    background: var(--color-neutral-700);
    color: white;
}

.code-content {
    padding: var(--space-6);
    overflow-x: auto;
}

.code-content pre {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-neutral-300);
}

.code-content .keyword {
    color: var(--color-secondary-400);
}

.code-content .string {
    color: var(--color-primary-400);
}

.code-content .comment {
    color: var(--color-neutral-500);
}

/* ==========================================================================
   SCROLL REVEAL ANIMATIONS
   ========================================================================== */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all var(--transition-smooth);
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all var(--transition-smooth);
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all var(--transition-smooth);
}

.reveal-scale.active {
    opacity: 1;
    transform: scale(1);
}

/* Stagger delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ==========================================================================
   HOVER EFFECTS
   ========================================================================== */

.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.hover-zoom {
    overflow: hidden;
}

.hover-zoom img {
    transition: transform var(--transition-slow);
}

.hover-zoom:hover img {
    transform: scale(1.05);
}

/* ==========================================================================
   CONTINUOUS ANIMATIONS
   ========================================================================== */

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.5); opacity: 0; }
}

.pulse-ring {
    animation: pulse-ring 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.animate-gradient {
    background-size: 200% 200%;
    animation: gradient-shift 8s ease infinite;
}

@keyframes swap-rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(180deg); }
}

.animate-swap {
    animation: swap-rotate 0.4s ease-in-out;
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */

@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;
    }

    .reveal,
    .reveal-left,
    .reveal-right,
    .reveal-scale {
        opacity: 1;
        transform: none;
    }
}

/* ==========================================================================
   SCROLLBAR
   ========================================================================== */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-dark);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-medium) var(--bg-secondary);
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
    .nav,
    .footer,
    .btn,
    .mobile-menu-btn {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .hero {
        padding-top: 0;
    }
}

/* ==========================================================================
   PERFORMANCE OPTIMIZATION
   ========================================================================== */

.section {
    content-visibility: auto;
    contain-intrinsic-size: 0 500px;
}

/* GPU acceleration for animations */
.reveal,
.reveal-left,
.reveal-right,
.reveal-scale,
.hover-lift,
.hover-zoom img {
    will-change: transform, opacity;
    transform: translateZ(0);
}