:root {
    --bg-dark: #02050a;
    --text-primary: #e0e6ed;
    --text-secondary: #94a3b8;
    --accent-primary: #f59e0b; /* Signal Gold */
    --accent-secondary: #3b82f6; /* Orbital Blue */
    --card-bg: #0f172a;
    --border-color: #1e293b;
    --font-header: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.7;
    overflow-x: hidden;
}

.home-nav {
    padding: 2rem;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
}

.home-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2px;
    transition: color 0.3s ease;
    text-transform: uppercase;
}

.home-nav a:hover {
    color: var(--accent-primary);
}

header {
    height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    background: radial-gradient(circle at center, #1e293b 0%, var(--bg-dark) 80%);
    position: relative;
    overflow: hidden;
}

header h1 {
    font-family: var(--font-header);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, var(--accent-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -2px;
}

header p {
    max-width: 600px;
    color: var(--text-secondary);
    font-size: 1.25rem;
    font-weight: 300;
}

.hero-canvas-container {
    width: 100%;
    height: 400px;
    background: #000;
    position: relative;
}

#hero-starlink-canvas {
    width: 100%;
    height: 100%;
}

main {
    max-width: 850px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

section {
    margin-bottom: 8rem;
}

h2 {
    font-family: var(--font-header);
    font-size: 2.25rem;
    margin-bottom: 1.5rem;
    color: var(--accent-primary);
    font-weight: 700;
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

strong {
    color: #fff;
    font-weight: 600;
}

.toc {
    background: #111827;
    padding: 3rem;
    border-radius: 4px;
    border: 1px solid #2d4a6f;
    margin: 0 auto 4rem;
    max-width: 750px;
    position: relative;
    z-index: 10;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 20px rgba(59, 130, 246, 0.05);
}

.toc-title {
    font-family: var(--font-header);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    display: block;
}

.toc ol {
    list-style: none;
}

.toc-part {
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--accent-secondary);
    margin: 2rem 0 0.5rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.toc a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    display: block;
    padding: 0.5rem 0;
    transition: all 0.2s ease;
    border-bottom: 1px solid transparent; width: fit-content;
}

.toc a:hover {
    color: var(--accent-primary);
    transform: translateX(10px);
}

.interactive-container {
    background: #080c14;
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin: 3rem 0;
    border-radius: 4px;
}

.visual-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    letter-spacing: 2px;
    font-weight: 700;
}

canvas {
    width: 100%;
    background: #000;
    display: block;
    margin-bottom: 1.5rem;
}

.controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.slider-group label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

input[type="range"] {
    appearance: none;
    background: #1e293b;
    height: 4px;
    border-radius: 2px;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-box {
    background: #1e293b;
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
}

.stat-val {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.6rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

footer {
    padding: 6rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

@media (max-width: 768px) {
    header { height: 60vh; }
    .toc { margin: -50px 1.5rem 4rem; padding: 2rem; }
    .stats-grid { grid-template-columns: 1fr; }
}