:root {
    --primary: #d97706;
    --primary-dark: #b45309;
    --primary-light: #fbbf24;
    --secondary: #1e40af;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --dark: #1f2937;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --sidebar-width: 260px;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.08);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.5;
}

/* LOGIN */
.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #fbbf24 0%, #d97706 100%);
    padding: 1rem;
}

.login-container { width: 100%; max-width: 420px; }

.login-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}

.login-header { text-align: center; margin-bottom: 2rem; }

.logo-icon { font-size: 3.5rem; margin-bottom: 0.5rem; }

.login-header h1 {
    font-size: 1.75rem;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.login-header p { color: var(--gray-500); font-size: 0.9rem; }

.login-hint {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.8rem;
    color: var(--gray-500);
}

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

.sidebar {
    width: var(--sidebar-width);
    background: var(--dark);
    color: white;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 1000;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-header .logo-icon { font-size: 1.75rem; }

.sidebar-header h2 { font-size: 1rem; font-weight: 600; }

.sidebar-nav { padding: 1rem 0; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255,255,255,0.05);
    color: white;
}

.nav-item.active {
    background: rgba(217, 119, 6, 0.15);
    color: var(--primary-light);
    border-left-color: var(--primary);
}

.nav-icon { font-size: 1.15rem; }

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    background: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-700);
}

.topbar-title h1 { font-size: 1.25rem; font-weight: 600; }

.topbar-title p { font-size: 0.8rem; color: var(--gray-500); }

.topbar-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-avatar {
    width: 40px; height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.content-area { padding: 1.5rem; flex: 1; }

/* CARDS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: white;
    padding: 1.25rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-info h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.stat-info .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
}

.stat-info .stat-sub {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}

.stat-icon {
    width: 48px; height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--gray-100);
}

.stat-icon.primary { background: #fef3c7; color: var(--primary-dark); }
.stat-icon.success { background: #d1fae5; color: #047857; }
.stat-icon.danger { background: #fee2e2; color: #b91c1c; }
.stat-icon.info { background: #dbeafe; color: #1e40af; }

/* CARD */
.card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.card-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body { padding: 1.5rem; }

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.4rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.9rem;
    border: 1.5px solid var(--gray-300);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: inherit;
    transition: all 0.2s;
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1);
}

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

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.2rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
}

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

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

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #059669; }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; }

.btn-info { background: var(--info); color: white; }
.btn-info:hover { background: #2563eb; }

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--gray-300);
    color: var(--gray-700);
}
.btn-outline:hover { background: var(--gray-100); }

.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; }
.btn-block { width: 100%; justify-content: center; }

.btn-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* TABLE */
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    min-width: 600px;
}

table thead {
    background: var(--gray-50);
}

table th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
}

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

table tbody tr:last-child td { border-bottom: none; }

/* BADGES */
.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success { background: #d1fae5; color: #047857; }
.badge-warning { background: #fef3c7; color: #b45309; }
.badge-danger { background: #fee2e2; color: #b91c1c; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-gray { background: var(--gray-200); color: var(--gray-700); }

/* ALERTS */
.alert {
    padding: 0.85rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.alert-success { background: #d1fae5; color: #047857; border-left: 4px solid var(--success); }
.alert-error { background: #fee2e2; color: #b91c1c; border-left: 4px solid var(--danger); }
.alert-info { background: #dbeafe; color: #1e40af; border-left: 4px solid var(--info); }

/* MODAL */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 1rem;
    backdrop-filter: blur(2px);
}

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

.modal {
    background: white;
    border-radius: var(--radius);
    width: 100%;
    max-width: 550px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
    animation: modalIn 0.2s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 { font-size: 1.1rem; font-weight: 600; }

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
    line-height: 1;
}

.modal-body { padding: 1.5rem; }
.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* CHARTS */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-container {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem;
}

.chart-container h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--gray-700);
}

.chart-wrapper { position: relative; height: 280px; }

/* FILTERS */
.filters {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: end;
}

.filters .form-group { margin-bottom: 0; flex: 1; min-width: 150px; }

/* EMPTY STATE */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--gray-500);
}

.empty-state .icon { font-size: 3rem; margin-bottom: 0.75rem; opacity: 0.4; }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }
}

@media (max-width: 640px) {
    .content-area { padding: 1rem; }
    .topbar { padding: 0.75rem 1rem; }
    .topbar-title h1 { font-size: 1rem; }
    .stat-info .stat-value { font-size: 1.35rem; }
    .stat-card { padding: 1rem; }
    .stat-icon { width: 40px; height: 40px; font-size: 1.25rem; }
    .card-header { padding: 1rem; }
    .card-body { padding: 1rem; }
    .login-card { padding: 1.75rem; }
}

/* PRINT */
@media print {
    .sidebar, .topbar, .btn, .filters { display: none !important; }
    .main-content { margin-left: 0; }
    .card { box-shadow: none; border: 1px solid #ddd; }
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-500); }