/* ==========================================================================
   BranchBox Landing Page Styles
   ========================================================================== */

/* CSS Custom Properties */
:root {
    /* Colors - Deep blue/violet theme */
    --color-bg-primary: #0a0a1a;
    --color-bg-secondary: #0d0d24;
    --color-bg-tertiary: #12122e;
    --color-bg-card: rgba(20, 20, 50, 0.6);
    --color-bg-code: #080818;

    --color-accent: #8b5cf6;
    --color-accent-bright: #a78bfa;
    --color-accent-dim: #6d28d9;
    --color-accent-glow: rgba(139, 92, 246, 0.2);

    --color-success: #22c55e;
    --color-success-dim: #16a34a;
    --color-error: #ef4444;
    --color-warning: #f59e0b;

    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;
    --color-text-dim: #475569;

    --color-border: rgba(139, 92, 246, 0.2);
    --color-border-subtle: rgba(255, 255, 255, 0.05);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 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;
    --space-4xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 900px;

    /* Effects */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-accent-glow);

    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Gradient Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 60%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    pointer-events: none;
    z-index: -1;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
}

a {
    color: var(--color-accent-bright);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

strong {
    font-weight: 600;
}

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

.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-subtle);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 1.25rem;
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.logo-text {
    font-family: var(--font-mono);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg-primary);
    z-index: 200;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
}

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

.mobile-menu a {
    font-size: 1.5rem;
    color: var(--color-text-primary);
}

.mobile-menu-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 2rem;
    cursor: pointer;
}

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

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

.hero {
    padding: var(--space-4xl) 0;
    text-align: center;
}

.hero-container {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.badge-icon {
    color: var(--color-warning);
}

.hero-title {
    margin-bottom: var(--space-lg);
}

.hero-title-gradient {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-bright) 50%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-sub {
    display: block;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
}

.hero-tagline {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.7;
}

.hero-tagline strong {
    color: var(--color-text-primary);
}

/* Install Cards */
.install-cards {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
}

.install-card {
    flex: 1;
    min-width: 280px;
    max-width: 400px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    text-align: left;
}

.install-label {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.install-command {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-bg-code);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
}

.install-command code {
    flex: 1;
    color: var(--color-success);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow-x: auto;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

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

.copy-icon {
    font-size: 0.9rem;
}

/* ==========================================================================
   Problem / Solution Section
   ========================================================================== */

.problem-solution {
    padding: var(--space-4xl) 0;
    background: var(--color-bg-secondary);
}

.ps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.ps-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    border: 1px solid var(--color-border-subtle);
}

.ps-problem {
    border-color: rgba(239, 68, 68, 0.2);
}

.ps-solution {
    border-color: rgba(34, 197, 94, 0.2);
}

.ps-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.ps-problem .ps-title {
    color: var(--color-error);
}

.ps-solution .ps-title {
    color: var(--color-success);
}

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

.ps-intro {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.ps-list {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.ps-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
}

.ps-x {
    color: var(--color-error);
    font-weight: 600;
}

.ps-check {
    color: var(--color-success);
    font-weight: 600;
}

.ps-code {
    background: var(--color-bg-code);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    overflow-x: auto;
}

.ps-code pre {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.6;
}

/* Code Highlighting */
.code-comment { color: var(--color-text-dim); }
.code-prompt { color: var(--color-accent-bright); }
.code-string { color: var(--color-success); }
.code-error { color: var(--color-error); }
.code-success { color: var(--color-success); }
.code-output { color: var(--color-text-secondary); }
.code-dim { color: var(--color-text-tertiary); }
.code-cursor {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* ==========================================================================
   Magic Section (Terminal Demo)
   ========================================================================== */

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

.section-title {
    text-align: center;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
}

.terminal {
    max-width: 900px;
    margin: 0 auto;
    background: var(--color-bg-code);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border: 1px solid var(--color-border);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--color-border-subtle);
}

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

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-title {
    flex: 1;
    text-align: center;
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

.terminal-body {
    padding: var(--space-lg);
    overflow-x: auto;
}

.terminal-body pre {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.7;
}

/* ==========================================================================
   Workflow Section
   ========================================================================== */

.workflow {
    padding: var(--space-4xl) 0;
    background: var(--color-bg-secondary);
}

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

.workflow-step {
    flex: 1;
    min-width: 200px;
    max-width: 250px;
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dim) 100%);
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

.step-content h3 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.step-content code {
    display: block;
    background: var(--color-bg-code);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    color: var(--color-success);
    margin-bottom: var(--space-sm);
    white-space: nowrap;
    overflow-x: auto;
}

.step-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.workflow-arrow {
    display: flex;
    align-items: center;
    color: var(--color-accent);
    font-size: 1.5rem;
    padding-top: var(--space-xl);
}

@media (max-width: 900px) {
    .workflow-arrow {
        display: none;
    }
    .workflow-steps {
        flex-direction: column;
        align-items: center;
    }
    .workflow-step {
        max-width: 100%;
    }
}

/* ==========================================================================
   Features Grid
   ========================================================================== */

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

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

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

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

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

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.feature-card code {
    background: var(--color-bg-code);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.85em;
    color: var(--color-accent-bright);
}

/* ==========================================================================
   Agent Section
   ========================================================================== */

.agents {
    padding: var(--space-4xl) 0;
    background: var(--color-bg-secondary);
}

.agents-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

@media (max-width: 900px) {
    .agents-content {
        grid-template-columns: 1fr;
    }
}

.agents-text h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    margin-bottom: var(--space-md);
}

.agents-intro {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.agents-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.agents-list li {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    font-size: 1rem;
    line-height: 1.7;
}

.agents-list-text {
    flex: 1;
    color: var(--color-text-secondary);
}

.agents-list strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.agents-list code {
    background: var(--color-bg-code);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-accent-bright);
    white-space: nowrap;
}

.agents-check {
    color: var(--color-success);
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
    line-height: 1.5;
}

.agents-code {
    background: var(--color-bg-code);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    overflow-x: auto;
    border: 1px solid var(--color-border);
}

.agents-code pre {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.7;
}

/* ==========================================================================
   CLI Reference
   ========================================================================== */

.cli-ref {
    padding: var(--space-4xl) 0;
}

.cli-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

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

.cli-cmd {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-success);
    margin-bottom: var(--space-sm);
}

.cli-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.cli-flags {
    max-width: 800px;
    margin: 0 auto;
}

.cli-flags h3 {
    text-align: center;
    margin-bottom: var(--space-lg);
    color: var(--color-text-secondary);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.flags-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-sm);
}

.flag {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.flag code {
    color: var(--color-accent-bright);
    white-space: nowrap;
}

.flag span {
    color: var(--color-text-tertiary);
}

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

.cta {
    padding: var(--space-4xl) 0;
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
    text-align: center;
}

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

.cta > .container > p {
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--space-xl);
}

.cta-install {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    background: var(--color-bg-code);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-xl);
}

.cta-install code {
    color: var(--color-success);
    font-size: 1rem;
}

.copy-btn-cta {
    background: var(--color-accent-dim);
    border-color: var(--color-accent);
}

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

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-base);
}

.cta-btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dim) 100%);
    color: white;
}

.cta-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md), 0 0 20px var(--color-accent-glow);
    color: white;
}

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

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

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

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

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-2xl);
}

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

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.footer-brand p {
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
    margin-top: var(--space-sm);
}

.footer-copy {
    margin-top: var(--space-md) !important;
    font-size: 0.8rem !important;
    color: var(--color-text-dim) !important;
}

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

.footer-col h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-md);
}

.footer-col a {
    display: block;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-sm);
}

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

@media (max-width: 600px) {
    .footer-content {
        flex-direction: column;
    }
    .footer-links {
        flex-direction: column;
        gap: var(--space-xl);
    }
}

/* ==========================================================================
   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;
}