body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Mengatur agar konten di mulai dari atas */
    min-height: 100vh;
    padding-top: 50px; /* Jarak dari atas */
}

.container {
    background-color: #ffffff;
    padding: 30px 40px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 800px; /* Lebar maksimal container */
    margin-bottom: 50px; /* Jarak bawah jika konten panjang */
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 25px;
    font-size: 1.8em;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    color: #555;
    font-weight: bold;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: calc(100% - 20px);
    padding: 10px;
    border: 1px solid #ccd;
    border-radius: 5px;
    font-size: 1em;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus,
.form-group input[type="date"]:focus,
.form-group input[type="number"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #007bff;
    outline: none;
}

button {
    width: 100%;
    padding: 12px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1em;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 15px;
}

button:hover {
    background-color: #0056b3;
}

.error {
    color: #d9534f;
    background-color: #f2dede;
    border: 1px solid #ebccd1;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
}

.success {
    color: #5cb85c;
    background-color: #dff0d8;
    border: 1px solid #d6e9c6;
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
    margin-bottom: 20px;
}

nav ul li {
    display: inline-block;
    margin: 0 15px;
}

nav ul li a {
    text-decoration: none;
    color: #007bff;
    font-weight: bold;
    font-size: 1.1em;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #0056b3;
}

.sub-nav {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.sub-nav a {
    text-decoration: none;
    color: #007bff;
    margin: 0 10px;
    font-weight: bold;
}

.sub-nav a:hover {
    color: #0056b3;
}

/* Styling untuk data_siswa.php */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 10px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
    color: #333;
}

tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

tbody tr:hover {
    background-color: #f1f1f1;
}

.action-buttons {
    text-align: right;
    margin-bottom: 20px;
}

.action-buttons a {
    display: inline-block;
    padding: 8px 15px;
    margin-left: 10px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.9em;
    transition: background-color 0.3s ease;
}

.action-buttons a.print-all {
    background-color: #28a745; /* Warna hijau untuk cetak rekap */
}

.action-buttons a:hover {
    opacity: 0.9;
}