:root {
    --bg-dark: #0f0f0f;
    --bg-light: #282828;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-green: #1db954;
    --accent-blue: #4285f4;
    --accent-hover: #1ed760;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-green);
    letter-spacing: -0.5px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #1a1a1a 0%, #000000 100%);
    padding: 5rem 5%;
    text-align: center;
    border-bottom: 1px solid #333;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 500px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: scale(1.05);
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 4rem 5%;
    background-color: #121212;
}

.feature-card {
    background: #181818;
    padding: 2rem;
    border-radius: 8px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: #282828;
}

.feature-card h3 {
    color: var(--accent-green);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* Auth Forms */
.auth-container {
    max-width: 400px;
    margin: 4rem auto;
    padding: 2rem;
    background: #181818;
    border-radius: 8px;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    background: #282828;
    border: 1px solid #404040;
    border-radius: 4px;
    color: white;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-green);
}

.error {
    color: #ff4444;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: rgba(255, 68, 68, 0.1);
    border-radius: 4px;
}

.success {
    color: var(--accent-green);
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: rgba(29, 185, 84, 0.1);
    border-radius: 4px;
}

.auth-link {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
}

.auth-link a {
    color: var(--accent-green);
    text-decoration: none;
}

.auth-link a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    background: #080808;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        padding: 1rem;
    }
    
    .nav {
        margin-top: 1rem;
    }
    
    .nav a {
        margin: 0 0.5rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}