/* ROOT VARIABLES & RESET */
:root {
    --bg-dark: #0f1115;
    --bg-card: #161b22;
    --bg-card-hover: #1c2128;
    --text-main: #e6edf3;
    --text-muted: #8b949e;

    /* Camera Module Accents (Teal/Cyan) */
    --accent-camera: #14b8a6;
    --accent-secondary: #0ea5e9;
    --accent-glow: rgba(20, 184, 166, 0.15);

    --border-color: #30363d;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
}

/* BACKGROUND */
.page-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    background:
        radial-gradient(circle at 15% 20%, rgba(20, 184, 166, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(14, 165, 233, 0.08) 0%, transparent 35%);
}

.docs-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* NAVIGATION HEADER */
.page-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s;
}

.back-btn:hover {
    color: var(--text-main);
}

.nav-breadcrumbs {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.crumb-current {
    color: var(--accent-camera);
    font-weight: 600;
}

.crumb-sep {
    margin: 0 0.5rem;
    opacity: 0.5;
}

/* HERO SECTION */
.hero-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 4rem;
    margin-bottom: 5rem;
}


.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    background: linear-gradient(to right, #fff, #5eead4);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 550px;
    margin-bottom: 2rem;
}

.tech-stack-pills {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.pill {
    padding: 0.35rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
}

/* CAMERA LENS VISUAL */
.camera-lens-visual {
    width: 300px;
    height: 300px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.lens-outer-ring {
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: linear-gradient(135deg, #1f2937, #111827);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

.lens-mid-ring {
    position: absolute;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    border: 4px solid #374151;
    background: #000;
}

.lens-inner-glass {
    position: absolute;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #4b5563, #000);
    border: 1px solid #4b5563;
    overflow: hidden;
}

.lens-reflection {
    position: absolute;
    top: 20%;
    left: 20%;
    width: 40px;
    height: 30px;
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(-45deg);
    border-radius: 50%;
    filter: blur(5px);
}

.sensor-grid {
    position: absolute;
    width: 300px;
    height: 300px;
    background-image:
        linear-gradient(rgba(20, 184, 166, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(20, 184, 166, 0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    border-radius: 50%;
    z-index: -1;
    opacity: 0.5;
}

/* FEATURES GRID */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 5rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-camera);
    transform: translateY(-5px);
}

.icon-wrapper {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.icon-resolution {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.icon-fps {
    background: rgba(236, 72, 153, 0.1);
    color: #ec4899;
}

.icon-source {
    background: rgba(20, 184, 166, 0.1);
    color: #14b8a6;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* UI PREVIEW SECTION */
.ui-preview-section {
    margin-bottom: 5rem;
}

.section-title {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 3rem;
}

.mockup-container {
    max-width: 800px;
    margin: 0 auto;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #0d1117;
}

.window-header {
    background: #161b22;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.window-controls {
    display: flex;
    gap: 0.5rem;
    margin-right: 1rem;
}

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

.red {
    background: #ff5f57;
}

.yellow {
    background: #febc2e;
}

.green {
    background: #28c840;
}

.window-title {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-sans);
}

.mockup-body {
    padding: 1.5rem;
}

.control-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.cam-select {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cam-icon {
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem;
    border-radius: 50%;
}

.cam-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.tags {
    display: flex;
    gap: 0.5rem;
}

.tag {
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-weight: 600;
}

.tag.res {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

.tag.fps {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.start-btn {
    background: var(--accent-secondary);
    border: none;
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: default;
    /* Mockup only */
}

.section-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.res-grid {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    /* Hide scroll for mockup */
}

.res-pill {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.res-pill.active {
    background: var(--accent-camera);
    color: #fff;
    border-color: var(--accent-camera);
}

.speed-list {
    background: rgba(236, 72, 153, 0.05);
    border: 1px dashed rgba(236, 72, 153, 0.2);
    border-radius: 8px;
    padding: 1rem;
}

.speed-row {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #f472b6;
}

/* CODE DETAILS TERMINAL */
.terminal-box {
    background: #0d1117;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.terminal-header {
    background: rgba(255, 255, 255, 0.03);
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.terminal-lang {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
}

.terminal-snippet {
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #e6edf3;
    line-height: 1.6;
}

.cmd {
    color: #3fb950;
    font-weight: 600;
}

.arg {
    color: #d2a8ff;
    margin-left: 0.5rem;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
    }

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

    .mockup-container {
        display: none;
    }

    /* Hide complex mockup on mobile */
}