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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: #333;
    color: white;
    padding: 1rem 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

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

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 3px;
    transition: background 0.3s;
}

nav a:hover {
    background: #555;
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem 0;
}

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

/* Login Form */
.login-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    background: #f9f9f9;
}

.login-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-size: 1rem;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #007bff;
}

.btn {
    background: #007bff;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 1rem;
    width: 100%;
    transition: background 0.3s;
}

.btn:hover {
    background: #0056b3;
}

/* Dashboard */
.dashboard-content {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 5px;
    margin: 1rem 0;
}

/* Alerts */
.alert {
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    border-radius: 3px;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* Footer */
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 1rem 0;
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        text-align: center;
    }
    
    .login-container {
        margin: 1rem;
        padding: 1.5rem;
    }
}