:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --text-muted: #8b949e;
    --primary-color: #2f81f7;
    --primary-hover: #1f6feb;
    --secondary-bg: #161b22;
    --border-color: #30363d;
    --card-bg: #21262d;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-center {
    text-align: center;
}

/* Header */
.header {
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
}

.logo:hover {
    text-decoration: none;
    color: #ffffff;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    text-decoration: none;
}

.nav-links a:hover, .nav-links a.active {
    color: #ffffff;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--bg-color) 100%);
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: #ffffff;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    border: 1px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: #ffffff;
}

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

.btn-secondary:hover {
    background-color: var(--border-color);
    color: #ffffff;
}

/* Features Section */
.features {
    padding: 5rem 0;
}

.section-title {
    font-size: 2rem;
    color: #ffffff;
    margin-bottom: 3rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.card h3 {
    color: #ffffff;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.card p {
    color: var(--text-muted);
}

/* Page Content (About & Privacy) */
.page-content {
    padding: 4rem 0;
    min-height: 60vh;
}

.page-content h1 {
    font-size: 2.5rem;
    color: #ffffff;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.text-content h2 {
    font-size: 1.5rem;
    color: #ffffff;
    margin: 2rem 0 1rem 0;
}

.text-content p {
    margin-bottom: 1rem;
    color: var(--text-color);
    font-size: 1.1rem;
}

.text-content strong {
    color: #ffffff;
}

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

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-decoration: none;
}

.footer-links a:hover {
    color: #ffffff;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        justify-content: center;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}