:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-hover: #2563eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background-color: rgba(15, 23, 42, 0.9);
    border-bottom: 1px solid #334155;
}

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

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
}

.btn-login {
    border: 1px solid var(--accent-blue);
    padding: 0.5rem 1.2rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.btn-login:hover {
    background-color: var(--accent-blue);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 8rem 2rem;
    background: linear-gradient(180deg, var(--bg-dark) 0%, #1e293b 100%);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: white;
    text-decoration: none;
    padding: 1rem 2rem;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: bold;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

/* Features Section */
.features-section {
    padding: 5rem 5%;
    text-align: center;
}

.features-section h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.feature-card {
    background-color: var(--bg-card);
    padding: 2.5rem;
    border-radius: 8px;
    width: 300px;
    border: 1px solid #334155;
}

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

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

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid #334155;
    color: var(--text-muted);
    margin-top: 3rem;
}