/* ========================================
   Clash - Global Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #6c5ce7;
    --primary-dark: #5a4bd1;
    --secondary-color: #00cec9;
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --border-color: #2a2a3a;
    --success: #00b894;
    --warning: #fdcb6e;
    --error: #ff7675;
    --gradient-primary: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    --gradient-secondary: linear-gradient(135deg, #00cec9 0%, #81ecec 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(108, 92, 231, 0.5);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 0%, #a0a0b0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.code-block {
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
    background: var(--bg-card-hover);
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.code-title {
    margin-left: 12px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.code-block pre {
    padding: 24px;
    margin: 0;
    overflow-x: auto;
}

.code-block code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
}

.code-block .key {
    color: #82aaff;
}

.code-block .value {
    color: #c3e88d;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: 100px 0;
    background: var(--bg-card);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(108, 92, 231, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   Platforms Section
   ======================================== */
.platforms {
    padding: 100px 0;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

.platform-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.platform-card:hover {
    transform: translateY(-4px);
    border-color: var(--secondary-color);
    box-shadow: 0 10px 30px rgba(0, 206, 201, 0.1);
}

.platform-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.platform-card h3 {
    font-size: 1rem;
    margin-bottom: 12px;
}

.platform-link {
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 500;
}

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

/* ========================================
   Docs Section
   ======================================== */
.docs-section {
    padding: 100px 0;
    background: var(--bg-card);
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.doc-card {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.doc-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.doc-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.doc-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 12px;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.footer-column a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
}

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

/* ========================================
   Download Page
   ======================================== */
.download-hero {
    padding: 160px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-dark) 100%);
}

.download-hero h1 {
    font-size: 3rem;
    margin-bottom: 16px;
}

.download-hero p {
    color: var(--text-secondary);
    font-size: 1.25rem;
}

.download-section {
    padding: 60px 0;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 24px;
}

.download-platform {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.platform-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.platform-icon-lg {
    font-size: 3rem;
}

.platform-info h3 {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

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

.download-buttons {
    display: flex;
    gap: 12px;
}

.download-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 24px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

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

.download-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(108, 92, 231, 0.4);
}

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

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

.download-btn small {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-top: 4px;
}

.download-methods {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.download-methods details {
    background: var(--bg-dark);
    border-radius: 8px;
}

.download-methods summary {
    padding: 12px 16px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.method-content {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    gap: 12px;
}

.method-content code {
    flex: 1;
    background: var(--bg-card);
    padding: 12px;
    border-radius: 8px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
}

.copy-btn {
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: var(--primary-dark);
}

.copy-btn.copied {
    background: var(--success);
}

.download-note {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding: 16px;
    background: rgba(108, 92, 231, 0.1);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.note-icon {
    font-size: 1.25rem;
}

/* Changelog */
.changelog-section {
    padding: 80px 0;
    background: var(--bg-card);
}

.changelog-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
}

.changelog {
    max-width: 600px;
    margin: 0 auto 40px;
}

.changelog-item {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}

.version-tag {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-right: 12px;
}

.version-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.changelog-item ul {
    margin-top: 16px;
}

.changelog-item li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.changelog-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.changelog-section .btn {
    display: block;
    width: fit-content;
    margin: 0 auto;
}

/* ========================================
   404 Page
   ======================================== */
.error-page {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
}

.error-content {
    text-align: center;
    max-width: 600px;
}

.error-visual {
    margin-bottom: 40px;
}

.error-number {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.error-number .number {
    font-size: 8rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform 0.1s ease;
}

.error-number .icon {
    font-size: 5rem;
    color: var(--primary-color);
    transition: transform 0.5s ease;
}

.error-page h1 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.error-message {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.error-hint {
    color: var(--text-muted);
    margin-bottom: 40px;
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

.quick-links h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.quick-link:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(108, 92, 231, 0.15);
}

.link-icon {
    font-size: 2rem;
}

.quick-link span:last-child {
    font-weight: 500;
}

.error-footer {
    padding-top: 0;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

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

    .platforms-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

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

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .code-block {
        max-width: 100%;
        overflow-x: auto;
    }

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

    .section-header h2 {
        font-size: 1.75rem;
    }

    .download-platform {
        flex-direction: column;
        gap: 24px;
    }

    .download-buttons {
        flex-wrap: wrap;
        justify-content: center;
    }

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

    .error-number .number {
        font-size: 5rem;
    }

    .error-number .icon {
        font-size: 3rem;
    }

    .error-actions {
        flex-direction: column;
        align-items: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

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

    .btn {
        width: 100%;
    }

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

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