:root {
    --primary-color: #6c757d; /* grey */
    --secondary-color: #adb5bd; /* light grey */
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa; /* very light grey */
    --dark-color: #212529; /* almost black for text */
    --white-color: #ffffff;
    --border-color: #dee2e6;
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.10);
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}



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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-color); /* hitam */
    background: #5c5c5c; /* grey */
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.main-wrapper {
    background: var(--white-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    min-height: calc(100vh - 40px);
}

/* Header Styles */
.header {
    background: var(--light-color);
    color: var(--dark-color);
    padding: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.1;
}

.header-content {
    position: relative;
    z-index: 1;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.header-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

.header-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

/* Stats Cards */
.stats-container {
    padding: 2rem;
    background: var(--light-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.5s;
}

.stat-card:hover::before {
    left: 100%;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    position: relative;
}

.stat-label {
    font-size: 0.9rem;
    color: #6c757d;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    opacity: 0.1;
}

/* Form Styles */
.form-section {
    background: var(--white-color);
    padding: 2rem;
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-color);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white-color);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-control:invalid {
    border-color: var(--danger-color);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white-color);
}

.btn-primary:hover:not(:disabled) {
    background: var(--secondary-color);
    color: var(--dark-color);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #c82333);
    color: var(--white-color);
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(220, 53, 69, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #1e7e34);
    color: var(--white-color);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* Table Styles */
.table-container {
    background: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin: 1.5rem 0;
}

.table-header {
    padding: 1.5rem;
    background: var(--light-color);
    border-bottom: 1px solid var(--border-color);
}

.table-wrapper {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.table th {
    background: var(--primary-color);
    color: var(--white-color);
}

.table td {
    padding: 1rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: rgba(102, 126, 234, 0.05);
}

/* Status Badges */
.status-badge {
    background: var(--light-color);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.status-aktif {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(40, 167, 69, 0.2);
}

.status-non-aktif {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.birthday-badge {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: var(--white-color);
    padding: 0.3rem 0.6rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 600;
    animation: pulse 2s infinite;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Loading and Empty States */
.loading {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #6c757d;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

/* Alert Styles */
.alert {
    background: var(--light-color);
    color: var(--dark-color);
    border-color: var(--primary-color);
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    border-color: var(--success-color);
    color: #155724;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    border-color: var(--danger-color);
    color: #721c24;
}

.alert-info {
    background: rgba(23, 162, 184, 0.1);
    border-color: var(--info-color);
    color: #0c5460;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(50px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.font-weight-bold { font-weight: 700; }
.text-muted { color: #6c757d; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 1rem; }
.p-0 { padding: 0; }
.d-none { display: none; }
.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }