:root {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --primary-color: #38bdf8;
    --secondary-color: #818cf8;
    --accent-color: #c084fc;
    --surface-color: rgba(30, 41, 59, 0.7);
    --border-color: rgba(148, 163, 184, 0.1);
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --max-width: 1200px;
    --nav-height: 80px;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

h1 { font-size: 3.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--secondary-color);
}

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

header {
    height: var(--nav-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    background: rgba(15, 23, 42, 0.6);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -0.05em;
}

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

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    opacity: 0.8;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--primary-color);
}

main {
    margin-top: var(--nav-height);
    flex: 1;
    padding: 4rem 0;
}

section {
    margin-bottom: 6rem;
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero p {
    font-size: 1.25rem;
    color: #94a3b8;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.1) 0%, rgba(15, 23, 42, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 8px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
    color: white;
}

/* Content Pages (Terms, Privacy) */
.content-page {
    max-width: 800px;
    margin: 0 auto;
}

.content-page h1 {
    margin-bottom: 2rem;
}

.content-page section {
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.content-page p, .content-page ul {
    margin-bottom: 1rem;
    color: #cbd5e1;
}

.content-page ul {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    background: rgba(15, 23, 42, 0.4);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

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

.copyright {
    color: #64748b;
    font-size: 0.875rem;
}

/* Animation Utilities */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    .nav-links {
        display: none; /* simple hide for mobile for this iteration unless menu requested */
    } 
    /* Ideally add mobile menu logic here if needed, but keeping simple for MVP */
}