:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --primary-color: #58a6ff;
    --secondary-color: #238636;
    --card-bg: #161b22;
    --border-color: #30363d;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

button {
    cursor: pointer;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
}

#loginBtn {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.hero {
    text-align: center;
    padding: 100px 0;
    animation: fadeIn 1s ease-in-out;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: -webkit-linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 40px auto;
    color: #8b949e;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

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

.secondary-btn {
    background-color: #21262d;
    color: #c9d1d9;
    border: 1px solid var(--border-color);
}

.secondary-btn:hover {
    background-color: #30363d;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 50px 0;
}

.card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.card h3 {
    color: var(--primary-color);
}

footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    color: #8b949e;
}

/* Micro-animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.glow-on-hover:hover {
    box-shadow: 0 0 10px var(--primary-color), 0 0 20px var(--primary-color);
}