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

body {
    background-color: #f8f9fa;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: #2c3e50;
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
}

header nav a:hover {
    color: #3498db;
}

.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 20px;
    flex: 1;
    width: 100%;
}

footer {
    text-align: center;
    padding: 1rem;
    background: #2c3e50;
    color: #fff;
    margin-top: auto;
}

.card {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    background: #3498db;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-weight: bold;
}

.btn:hover {
    background: #2980b9;
}

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

.form-group label {
    display: block;
    margin-bottom: .5rem;
    font-weight: 600;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.error {
    color: #e74c3c;
    margin-bottom: 1rem;
}