:root {
    --bg-color: #0a0c10;
    --surface-color: #161b22;
    --accent-color: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --border-color: #30363d;
    --nav-bg: rgba(13, 17, 23, 0.8);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

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

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

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

a:hover {
    opacity: 0.8;
}

/* Layout */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Nav */
.top-strip {
    background: var(--accent-color);
    color: var(--bg-color);
    text-align: center;
    padding: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05rem;
    text-transform: uppercase;
}

header {
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--accent-color);
}

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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    background: radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-block;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-color);
    border: none;
    box-shadow: 0 0 15px var(--accent-glow);
}

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

.btn:hover {
    transform: translateY(-2px);
    opacity: 1;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

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

/* Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
    transition: border-color 0.3s;
}

.card:hover {
    border-color: var(--accent-color);
}

.card h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

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

/* Content Pages */
.content-page {
    padding: 4rem 0;
    max-width: 800px;
    margin: 0 auto;
}

.content-page h1 {
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

.content-page h2 {
    margin: 2.5rem 0 1rem;
    font-size: 1.5rem;
    color: var(--accent-color);
}

.content-page p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.content-page ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.content-page li {
    margin-bottom: 0.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

input, textarea, select {
    width: 100%;
    padding: 0.8rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    background: var(--bg-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
}