/* ========================================
   PDF-Master Website Styles
   Inspired by OpenAI Codex Design
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #10a37f;
    --color-primary-dark: #0d8a6a;
    --color-primary-light: #1ab38d;
    --color-secondary: #6366f1;
    --color-accent: #f59e0b;

    /* Neutral */
    --color-bg: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-surface: #222222;
    --color-surface-hover: #2a2a2a;

    /* Text */
    --color-text: #ffffff;
    --color-text-secondary: #a1a1a1;
    --color-text-muted: #6b6b6b;

    /* Border */
    --color-border: #333333;
    --color-border-light: #444444;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #10a37f 0%, #6366f1 100%);
    --gradient-hero: linear-gradient(180deg, rgba(16, 163, 127, 0.1) 0%, transparent 50%);

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(16, 163, 127, 0.3);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

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

    /* Layout */
    --max-width: 1200px;
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

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

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

/* ========================================
   Navigation
   ======================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.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: var(--space-xl);
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-github {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-lg) var(--space-3xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    pointer-events: none;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(16, 163, 127, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-container {
    position: relative;
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-xl);
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

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

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

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1rem;
}

/* ========================================
   Pain Point Section
   ======================================== */

.pain-point {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--color-bg-secondary);
}

.pain-point .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.pain-card, .solution-card {
    flex: 1;
    min-width: 280px;
    max-width: 400px;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.pain-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.solution-card {
    background: linear-gradient(135deg, rgba(16, 163, 127, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
    border: 1px solid var(--color-primary);
}

.pain-icon, .solution-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.pain-card h3, .solution-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

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

.pain-arrow {
    font-size: 2rem;
    color: var(--color-primary);
}

/* ========================================
   Section Headers
   ======================================== */

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

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(16, 163, 127, 0.1);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ========================================
   Features Section
   ======================================== */

.features {
    padding: var(--space-3xl) 0;
}

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

.feature-card {
    padding: var(--space-xl);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

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

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

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

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

/* ========================================
   Operations Section
   ======================================== */

.operations {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
}

.operations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.op-category {
    padding: var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.op-category h4 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.op-category ul {
    list-style: none;
}

.op-category li {
    padding: var(--space-xs) 0;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.op-category li::before {
    content: '•';
    color: var(--color-primary);
    margin-right: var(--space-sm);
}

/* ========================================
   Comparison Section
   ======================================== */

.comparison {
    padding: var(--space-3xl) 0;
}

.comparison-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.comparison-table th,
.comparison-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    background: var(--color-bg-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
}

.comparison-table th.highlight {
    background: rgba(16, 163, 127, 0.1);
    color: var(--color-primary);
}

.comparison-table td.highlight {
    background: rgba(16, 163, 127, 0.05);
}

.comparison-table tr.unique-row {
    background: rgba(16, 163, 127, 0.02);
}

.comparison-table tr.unique-row td {
    font-weight: 600;
}

.comparison-table tbody tr:hover {
    background: var(--color-bg-secondary);
}

/* ========================================
   Quick Start Section
   ======================================== */

.quickstart {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
}

.steps {
    display: grid;
    gap: var(--space-2xl);
    max-width: 800px;
    margin: 0 auto;
}

.step {
    position: relative;
    padding-left: calc(var(--space-3xl) + var(--space-lg));
}

.step-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    font-weight: 700;
}

.step h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.code-block {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.copy-btn {
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-surface-hover);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.code-block pre {
    padding: var(--space-lg);
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.code-block code .comment {
    color: var(--color-text-muted);
}

/* ========================================
   AI Providers Section
   ======================================== */

.ai-providers {
    padding: var(--space-3xl) 0;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-top: var(--space-md);
}

.zero-config-banner {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: linear-gradient(135deg, rgba(16, 163, 127, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-2xl);
}

.zero-config-icon {
    font-size: 3rem;
}

.zero-config-content h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.zero-config-content p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.zero-config-content code {
    background: var(--color-surface);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-primary);
}

.providers-categories {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.provider-category h4 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.providers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
}

.provider-card {
    padding: var(--space-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-fast);
    position: relative;
}

.provider-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.provider-card.featured {
    border-color: var(--color-primary);
    background: rgba(16, 163, 127, 0.05);
}

.provider-badge {
    position: absolute;
    top: -8px;
    right: 8px;
    background: var(--color-primary);
    color: white;
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.provider-logo {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.provider-card h4 {
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
}

.provider-card p {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.provider-note {
    display: block;
    margin-top: var(--space-xs);
    font-size: 0.7rem;
    color: var(--color-primary);
}

.quick-switch {
    margin-top: var(--space-2xl);
    padding: var(--space-xl);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
}

.quick-switch h4 {
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.step-note {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: rgba(16, 163, 127, 0.1);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--color-primary);
}

/* ========================================
   Agents Section
   ======================================== */

.agents {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
}

.agents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.agent-card {
    padding: var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.agent-card:hover {
    border-color: var(--color-primary);
}

.agent-model {
    display: inline-block;
    padding: 2px var(--space-sm);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.agent-model.haiku {
    background: rgba(99, 102, 241, 0.1);
    color: #818cf8;
}

.agent-model.sonnet {
    background: rgba(16, 163, 127, 0.1);
    color: var(--color-primary);
}

.agent-card h4 {
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
}

.agent-card p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ========================================
   CTA Section
   ======================================== */

.cta {
    padding: var(--space-3xl) 0;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}

.cta h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--space-md);
}

.cta p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

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

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-brand .logo-icon {
    font-size: 1.5rem;
}

.footer-brand .logo-text {
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

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

.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.footer-column a {
    display: block;
    padding: var(--space-xs) 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ========================================
   Responsive Design
   ======================================== */

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

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

    .nav-toggle {
        display: flex;
    }

    .hero-stats {
        gap: var(--space-lg);
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .pain-point .container {
        flex-direction: column;
    }

    .pain-arrow {
        transform: rotate(90deg);
    }

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

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

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

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

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

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-container > * {
    animation: fadeInUp 0.6s ease forwards;
}

.hero-badge { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-subtitle { animation-delay: 0.3s; }
.hero-cta { animation-delay: 0.4s; }
.hero-stats { animation-delay: 0.5s; }

/* Smooth scroll offset for fixed nav */
html {
    scroll-padding-top: calc(var(--nav-height) + var(--space-xl));
}