/* ==========================================
   OKF-go CLI Marketing Site Style Sheet
   Designed for Developer Aesthetic (Dark Theme)
   ========================================== */

:root {
    /* Color Palette */
    --bg-darker: #060913;
    --bg-dark: #0c1122;
    --bg-panel: rgba(22, 31, 56, 0.6);
    --bg-panel-solid: #161f38;
    --bg-terminal: #090e1a;
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-active: rgba(0, 242, 254, 0.4);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-accent-blue: #3b82f6;
    --color-accent-cyan: #00f2fe;
    --color-accent-purple: #9d4edd;
    
    --gradient-hero: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    --gradient-accent: linear-gradient(135deg, #7f00ff 0%, #e100ff 100%);
    --gradient-purple-blue: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    
    --shadow-glow-cyan: 0 0 20px rgba(0, 242, 254, 0.25);
    --shadow-glow-purple: 0 0 20px rgba(157, 78, 221, 0.25);
    --shadow-glow-inset: inset 0 1px 1px rgba(255, 255, 255, 0.1);
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-darker);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body {
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Background Glow Effects */
.glow-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.45;
    pointer-events: none;
    z-index: -1;
}

.glow-sphere-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.3) 0%, rgba(59, 130, 246, 0.1) 70%);
    top: -100px;
    right: -100px;
}

.glow-sphere-2 {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(157, 78, 221, 0.25) 0%, rgba(127, 0, 255, 0.05) 70%);
    top: 600px;
    left: -200px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.25;
}

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

code, pre {
    font-family: var(--font-mono);
}

/* Navigation Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(6, 9, 19, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    transition: var(--transition-normal);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-badge {
    background: var(--gradient-purple-blue);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-glow-purple);
}

.logo-text {
    font-weight: 600;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--gradient-hero);
    color: #060913;
    font-weight: 600;
    box-shadow: var(--shadow-glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 30px rgba(0, 242, 254, 0.4);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--border-subtle);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-large {
    padding: 0.8rem 1.75rem;
    font-size: 1rem;
    border-radius: 10px;
}

.github-btn svg {
    color: var(--text-secondary);
}

.github-btn:hover svg {
    color: var(--text-primary);
}

/* Hero Section */
.hero-section {
    padding: 6rem 1.5rem 4rem;
    text-align: center;
    position: relative;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.hero-tag {
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--color-accent-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.35rem 0.85rem;
    border-radius: 100px;
    box-shadow: inset 0 0 8px rgba(0, 242, 254, 0.1);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
    background: linear-gradient(135deg, #ffffff 40%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 680px;
    line-height: 1.5;
    margin-bottom: 1rem;
}

/* Install Bar */
.install-installer-bar {
    display: flex;
    align-items: center;
    background-color: var(--bg-terminal);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
    width: 100%;
    max-width: 480px;
    justify-content: space-between;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    transition: var(--transition-normal);
}

.install-installer-bar:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.install-cmd {
    color: var(--color-accent-cyan);
    font-family: var(--font-mono);
    text-align: left;
    overflow-x: auto;
    white-space: nowrap;
    margin-right: 1rem;
    padding-bottom: 2px;
}

/* Custom Scrollbar for code blocks */
.install-cmd::-webkit-scrollbar {
    height: 2px;
}
.install-cmd::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.1);
}

.btn-copy {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    font-family: var(--font-sans);
    transition: var(--transition-fast);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.btn-copy:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.08);
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

/* Grid Layout & Containers */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 1.5rem;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
}

.section-tag {
    color: var(--color-accent-purple);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.1rem;
}

.grid {
    display: grid;
    gap: 3rem;
    align-items: center;
}

.grid-2-cols {
    grid-template-columns: 1.1fr 0.9fr;
}

/* Terminal Simulator Section */
.terminal-container {
    background-color: var(--bg-terminal);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    max-width: 800px;
    margin: 0 auto;
}

.terminal-header {
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.75rem 1.25rem;
    display: flex;
    align-items: center;
    position: relative;
}

.terminal-dots {
    display: flex;
    gap: 0.4rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.terminal-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.terminal-tabs {
    background-color: rgba(255, 255, 255, 0.01);
    display: flex;
    border-bottom: 1px solid var(--border-subtle);
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    border-right: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: var(--bg-terminal);
    color: var(--color-accent-cyan);
    border-bottom: 2px solid var(--color-accent-cyan);
}

.terminal-body {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    min-height: 280px;
    overflow-y: auto;
    white-space: pre-wrap;
    line-height: 1.5;
}

.terminal-line {
    margin-bottom: 0.5rem;
}

.prompt {
    color: var(--color-accent-purple);
    font-weight: bold;
}

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

.terminal-output {
    color: var(--text-secondary);
    animation: fadeIn 0.3s ease-out;
}

/* Color codes inside terminal output simulation */
.ansi-green { color: #10b981; }
.ansi-yellow { color: #f59e0b; }
.ansi-red { color: #ef4444; }
.ansi-cyan { color: #06b6d4; }
.ansi-blue { color: #3b82f6; }
.ansi-bold { font-weight: bold; }

/* Visual Context Graph Section */
.graph-section {
    position: relative;
    background-color: rgba(12, 17, 34, 0.4);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.graph-info {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.graph-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
}

.bfs-status {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.bfs-steps {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 1rem;
    background-color: rgba(6, 9, 19, 0.4);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    max-height: 160px;
    overflow-y: auto;
}

.bfs-step {
    opacity: 0.4;
    transition: opacity 0.3s ease;
    border-left: 2px solid transparent;
    padding-left: 0.5rem;
}

.bfs-step.active {
    opacity: 1;
    color: var(--color-accent-cyan);
    border-left-color: var(--color-accent-cyan);
}

.bfs-step.completed {
    opacity: 0.85;
    color: var(--text-secondary);
    border-left-color: var(--color-accent-purple);
}

.graph-display-container {
    position: relative;
    width: 100%;
    height: 400px;
    background-color: var(--bg-terminal);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.canvas-glow {
    position: absolute;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

#graph-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Interactive Playground Section */
.playground-section {
    border-bottom: 1px solid var(--border-subtle);
}

.playground-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.panel {
    background-color: var(--bg-panel-solid);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 520px;
    box-shadow: 0 10px 35px rgba(0,0,0,0.3);
}

.panel-header {
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.75rem 1.25rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.status-pill {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 100px;
}

.status-success {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-warning {
    background-color: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-error {
    background-color: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.code-editor {
    flex: 1;
    background-color: var(--bg-terminal);
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 1.25rem;
    resize: none;
    outline: none;
    line-height: 1.5;
}

.parsed-output-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-darker);
    overflow-y: auto;
}

.parsed-metadata {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.metadata-row {
    display: flex;
    font-size: 0.85rem;
    align-items: center;
}

.metadata-label {
    width: 120px;
    font-weight: 500;
    color: var(--text-muted);
}

.metadata-value {
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.metadata-value-pill {
    background-color: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
    border: 1px solid rgba(139, 92, 246, 0.25);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-family: var(--font-mono);
}

.tags-container, .links-container {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.tag-pill, .link-pill {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
}

.tag-pill {
    background-color: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.link-pill {
    background-color: rgba(236, 72, 153, 0.15);
    color: #f472b6;
    border: 1px solid rgba(236, 72, 153, 0.25);
}

.parsed-body-header {
    background-color: rgba(255, 255, 255, 0.01);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.5rem 1.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.body-pre {
    flex: 1;
    padding: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
}

/* Key Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
}

.feature-card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-glow-inset);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-blue);
}

.feature-card:nth-child(2) .feature-icon {
    background: rgba(0, 242, 254, 0.1);
    border-color: rgba(0, 242, 254, 0.25);
    color: var(--color-accent-cyan);
}

.feature-card:nth-child(3) .feature-icon {
    background: rgba(157, 78, 221, 0.1);
    border-color: rgba(157, 78, 221, 0.25);
    color: var(--color-accent-purple);
}

.feature-card:nth-child(4) .feature-icon {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.25);
    color: #10b981;
}

.feature-card:nth-child(5) .feature-icon {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.25);
    color: #3b82f6;
}

.feature-card:nth-child(6) .feature-icon {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.25);
    color: #f59e0b;
}

.feature-card:nth-child(7) .feature-icon {
    background: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.25);
    color: #ec4899;
}

.feature-card:nth-child(8) .feature-icon {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.25);
    color: #10b981;
}

.feature-card:nth-child(9) .feature-icon {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.25);
    color: #f59e0b;
}

.feature-card:nth-child(10) .feature-icon {
    background: rgba(0, 242, 254, 0.1);
    border-color: rgba(0, 242, 254, 0.25);
    color: var(--color-accent-cyan);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.feature-text {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Getting Started Guide */
.getting-started-section {
    background-color: rgba(12, 17, 34, 0.4);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.getting-started-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.steps-card {
    background-color: var(--bg-panel-solid);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.steps-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
}

.code-block-container {
    background-color: var(--bg-terminal);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 1rem;
    font-size: 0.85rem;
    overflow-x: auto;
}

.code-block-container code {
    color: #f8fafc;
    white-space: pre;
}

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

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-subtle);
    padding: 3rem 1.5rem;
    background-color: var(--bg-darker);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Media Queries */
@media (max-width: 968px) {
    .grid-2-cols {
        grid-template-columns: 1fr;
    }
    
    .playground-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .panel {
        height: 420px;
    }
}

@media (max-width: 768px) {
    .site-nav {
        display: none; /* Mobile layout simplification */
    }
    
    .hero-section {
        padding: 4rem 1.5rem 3rem;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}