/* Premium Styles for Alumni UPM */
:root {
    --primary-color: #0b2545; /* Deep Navy */
    --secondary-color: #13315c;
    --accent-color: #e56b6f; /* Muted coral for interactions */
    --bg-color: #f8f9fa;
    --text-main: #333333;
    --surface-color: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #2a9d8f;
    --danger-color: #e76f51;
    --warning-color: #f4a261;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.auth-buttons a {
    color: white;
    text-decoration: none;
    margin-left: 1rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    transition: background 0.3s ease;
}

.auth-buttons a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    flex-grow: 1;
    width: 100%;
    box-sizing: border-box;
}

.card {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    margin: 0 auto;
    max-width: 600px;
}

.card h2 {
    margin-top: 0;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="tel"],
input[type="url"],
select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-sizing: border-box;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(11, 37, 69, 0.1);
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    font-weight: 600;
    transition: background-color 0.3s, transform 0.1s;
}

button:hover {
    background-color: var(--secondary-color);
}

button:active {
    transform: scale(0.98);
}

.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.alert-error {
    background-color: rgba(231, 111, 81, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(231, 111, 81, 0.2);
}

.alert-success {
    background-color: rgba(42, 157, 143, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(42, 157, 143, 0.2);
}

/* Data Tables */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}

table th, table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background-color: #f1f3f5;
    font-weight: 600;
    color: var(--primary-color);
}

table tr:hover {
    background-color: #f8f9fa;
}

.badge {
    padding: 0.3rem 0.6rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-pending {
    background-color: var(--warning-color);
    color: white;
}

.badge-active {
    background-color: var(--success-color);
    color: white;
}

.badge-rejected {
    background-color: var(--danger-color);
    color: white;
}

.action-btn {
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-block;
    margin-right: 0.5rem;
    width: auto;
    border: none;
}

.btn-approve {
    background-color: var(--success-color);
    color: white;
}
.btn-approve:hover {
    background-color: #21867a;
}

.btn-reject {
    background-color: var(--danger-color);
    color: white;
}
.btn-reject:hover {
    background-color: #cf6246;
}

.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 1rem;
}

a.text-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

a.text-link:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    padding: 2rem;
    color: #888;
    font-size: 0.9rem;
}

/* Dialog Backdrop and Styling */
dialog::backdrop {
    background-color: rgba(11, 37, 69, 0.4);
    backdrop-filter: blur(4px);
}