/* CORE-SERWIS - Style */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-100);
    color: var(--gray-900);
    line-height: 1.5;
}

/* Layout */
.app { display: flex; min-height: 100vh; }

.sidebar {
    width: 250px;
    background: var(--gray-900);
    color: white;
    padding: 1rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo {
    font-size: 1.25rem;
    font-weight: 700;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-700);
    margin-bottom: 1rem;
}

.sidebar-nav { list-style: none; }

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--gray-300);
    text-decoration: none;
    border-radius: 0.5rem;
    margin-bottom: 0.25rem;
    transition: all 0.2s;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background: var(--primary);
    color: white;
}

.sidebar-nav svg { width: 20px; height: 20px; }

.main {
    flex: 1;
    margin-left: 250px;
    padding: 2rem;
}

/* Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Cards */
.card {
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: white;
    border-radius: 0.75rem;
    padding: 1.25rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-outline { background: white; border: 1px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { background: var(--gray-50); }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }

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

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background: var(--gray-50);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--gray-700);
}

tr:hover { background: var(--gray-50); }

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

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.375rem;
    font-size: 0.875rem;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    font-size: 0.9375rem;
    transition: border-color 0.2s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success { background: #dcfce7; color: #166534; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #dbeafe; color: #1e40af; }

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.active { display: flex; }

.modal {
    background: white;
    border-radius: 0.75rem;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.modal-title { font-size: 1.125rem; font-weight: 600; }

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
}

.modal-body { padding: 1.5rem; }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
}

/* Toast */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
}

.toast {
    background: white;
    border-radius: 0.5rem;
    padding: 1rem 1.25rem;
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Login */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-700) 100%);
}

.login-box {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}

.login-logo {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.75rem 1.25rem;
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--gray-500);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Search */
.search-box {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.search-input {
    flex: 1;
    padding: 0.625rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
}

/* Actions */
.actions { display: flex; gap: 0.5rem; }

/* Checkbox */
.checkbox-group { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    cursor: pointer;
}

/* Details */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.detail-item label {
    display: block;
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.detail-item span {
    font-size: 0.9375rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -250px;
        transition: left 0.3s;
        z-index: 100;
    }
    .sidebar.open { left: 0; }
    .main { margin-left: 0; }
    .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 1rem;
        background: var(--gray-900);
        color: white;
        margin: -2rem -2rem 1.5rem -2rem;
    }
    .menu-btn {
        background: none;
        border: none;
        color: white;
        font-size: 1.5rem;
        cursor: pointer;
    }
    .form-row { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; gap: 1rem; align-items: flex-start; }
    th, td { padding: 0.5rem; font-size: 0.8125rem; }
}

/* User menu */
.user-menu {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-700);
}

.user-info {
    padding: 0.75rem 1rem;
    color: var(--gray-400);
    font-size: 0.875rem;
}

.user-info strong {
    display: block;
    color: white;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray-500);
}

/* Loading */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}