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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
}

.header {
    background: #2c3e50;
    color: white;
    padding: 1rem;
    text-align: center;
}

.header nav {
    margin-top: 1rem;
}

.header nav a {
    color: white;
    text-decoration: none;
    margin: 0 1rem;
    padding: 0.5rem 1rem;
}

.header nav a:hover {
    background: #34495e;
    border-radius: 4px;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
}

.form-section {
    background: white;
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.form-section input,
.form-section select,
.form-section textarea {
    width: 100%;
    padding: 0.5rem;
    margin: 0.5rem 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button {
    background: #3498db;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background: #2980b9;
}

.table-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: #f8f9fa;
    font-weight: bold;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.login-container input {
    width: 100%;
    padding: 0.75rem;
    margin: 0.5rem 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}