/* ============================
   torrent-dl Website - Main Styles
   
   Color Palette: Deep navy/slate with warm copper accents
   A sophisticated, professional look for media software
   ============================ */

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

:root {
    /* Colors - Warm Dark Theme with Copper Accents */
    --color-bg: #0c1117;
    --color-bg-secondary: #121820;
    --color-bg-tertiary: #1a2230;
    --color-surface: #151d28;
    --color-surface-elevated: #1c2736;
    
    --color-text: #e8e9eb;
    --color-text-secondary: #9ba3af;
    --color-text-muted: #6b7380;
    
    /* Copper/Amber accent colors */
    --color-primary: #c9873a;
    --color-primary-light: #daa054;
    --color-primary-dark: #a86e2c;
    
    /* Teal secondary accent */
    --color-accent: #3d8b8b;
    --color-accent-light: #4da6a6;
    
    --color-success: #4a9f6e;
    --color-warning: #c9873a;
    --color-error: #c45c5c;
    
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-light: rgba(255, 255, 255, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    --gradient-hero: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    
    /* Typography */
    --font-sans: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Layout */
    --max-width: 1100px;
    --navbar-height: 64px;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.25rem, 4.5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }
h4 { font-size: 1rem; }

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

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-surface);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ============================
   Navigation
   ============================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(12, 17, 23, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-text);
}

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

.logo-icon {
    color: var(--color-primary);
    font-size: 1.125rem;
}

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

.nav-links a {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

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

.github-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1rem;
    background: var(--color-surface);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

.github-link:hover {
    background: var(--color-surface-elevated);
    border-color: var(--color-border-light);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ============================
   Hero Section
   ============================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: calc(var(--navbar-height) + var(--spacing-3xl)) var(--spacing-lg) var(--spacing-3xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.25;
}

.orb-1 {
    top: 5%;
    left: 25%;
    width: 350px;
    height: 350px;
    background: var(--color-primary);
}

.orb-2 {
    top: 40%;
    right: 15%;
    width: 280px;
    height: 280px;
    background: var(--color-accent);
}

.hero .container {
    position: relative;
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.4rem 0.875rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.badge-icon {
    font-size: 1rem;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.highlight {
    color: var(--color-primary-light);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--spacing-2xl);
}

/* Terminal Demo */
.terminal-demo {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-width: 580px;
    margin: 0 auto var(--spacing-2xl);
    text-align: left;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 0.75rem var(--spacing-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.terminal-buttons {
    display: flex;
    gap: 6px;
}

.terminal-buttons span {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.btn-close { background: #c45c5c; }
.btn-minimize { background: #c9873a; }
.btn-maximize { background: #4a9f6e; }

.terminal-title {
    flex: 1;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.terminal-body {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.terminal-line {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: 0.375rem;
    min-height: 1.4em;
}

.prompt {
    color: var(--color-success);
    font-weight: 500;
}

.command {
    color: var(--color-text);
}

.terminal-line.output {
    padding-left: 1.375rem;
    color: var(--color-text-secondary);
}

.terminal-line.highlight-line {
    color: var(--color-primary-light);
}

/* Quick Install */
.quick-install {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 580px;
    margin: 0 auto;
}

.quick-install h3 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    font-size: 1.125rem;
}

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

.install-step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-size: 0.8125rem;
    font-weight: 600;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.code-block {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.625rem var(--spacing-md);
}

.code-block code {
    flex: 1;
    background: none;
    padding: 0;
    color: var(--color-primary-light);
    font-size: 0.8125rem;
    word-break: break-all;
}

.code-block.large {
    padding: 0.875rem var(--spacing-lg);
}

.code-block.large code {
    font-size: 0.875rem;
}

.copy-btn {
    flex-shrink: 0;
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

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

/* ============================
   Section Common Styles
   ============================ */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.section-header p {
    font-size: 1.0625rem;
}

/* ============================
   Features Section
   ============================ */
.features {
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.feature-card p {
    font-size: 0.9375rem;
}

/* ============================
   Usage Section
   ============================ */
.usage-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.usage-examples {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.usage-example h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.9375rem;
}

.example-desc {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.options-table h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.options-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.options-table td {
    padding: 0.75rem var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.875rem;
}

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

.options-table td:first-child {
    width: 140px;
    color: var(--color-primary-light);
    font-family: var(--font-mono);
}

.options-table td:last-child {
    color: var(--color-text-secondary);
}

/* ============================
   How It Works Section
   ============================ */
.how-it-works {
    background: var(--color-bg-secondary);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
}

.step-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.step-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.step-card h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.step-card p {
    font-size: 0.9375rem;
}

/* ============================
   Requirements Section
   ============================ */
.req-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.req-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.req-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.req-card h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.req-card p {
    font-size: 0.875rem;
}

.platform-install {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.platform-install h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.platform-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.platform-tab {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.platform-tab:hover {
    border-color: var(--color-border-light);
    color: var(--color-text);
}

.platform-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.platform-panel {
    display: none;
}

.platform-panel.active {
    display: block;
}

/* ============================
   CTA Section
   ============================ */
.cta {
    text-align: center;
    position: relative;
}

.cta h2 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.cta p {
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.375rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border-light);
    color: var(--color-text);
}

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

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

/* ============================
   Footer
   ============================ */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    font-size: 0.9375rem;
}

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

.footer-column h4 {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

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

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

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.footer-bottom a {
    color: var(--color-text-secondary);
}

/* ============================
   Responsive Design
   ============================ */
@media (max-width: 1024px) {
    .usage-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 56px;
    }
    
    .nav-links {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding-top: calc(var(--navbar-height) + var(--spacing-2xl));
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .terminal-demo {
        margin-left: calc(-1 * var(--spacing-md));
        margin-right: calc(-1 * var(--spacing-md));
        border-radius: 0;
    }
    
    .terminal-body {
        font-size: 0.8125rem;
    }
    
    .quick-install {
        padding: var(--spacing-lg);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .features-grid,
    .steps-grid,
    .req-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
}

/* ============================
   Utilities
   ============================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Print Styles */
@media print {
    .navbar,
    .cta,
    .hero-bg {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}