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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f4f4f4;
}

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

/* Header */
.header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 1rem;
}

.nav-links a:hover {
    text-decoration: underline;
}

/* Auth Forms */
.auth-form {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.auth-form h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.auth-form input {
    width: 100%;
    padding: 12px;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.auth-form button {
    width: 100%;
    padding: 12px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

.auth-form button:hover {
    background: #2980b9;
}

.alert {
    padding: 10px;
    margin-bottom: 1rem;
    border-radius: 4px;
}

.alert.error {
    background: #e74c3c;
    color: white;
}

.alert.success {
    background: #27ae60;
    color: white;
}