/* ─── Variables ─── */
:root {
    --primary: #1a56db;
    --primary-light: #e1effe;
    --primary-dark: #1e40af;
    --success: #059669;
    --success-light: #d1fae5;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --info: #0891b2;
    --info-light: #cffafe;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --sidebar-w: 260px;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

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

body {
    font-family: 'Tajawal', 'Segoe UI', sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    direction: rtl;
    min-height: 100vh;
}

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

/* ─── Sidebar ─── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--gray-900);
    color: #fff;
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform .3s;
}

.sidebar-brand {
    padding: 24px 20px;
    border-bottom: 1px solid var(--gray-700);
    text-align: center;
}

.sidebar-brand h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
}

.sidebar-brand small {
    color: var(--gray-400);
    font-size: .8rem;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
    overflow-y: auto;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--gray-300);
    text-decoration: none;
    font-size: .95rem;
    transition: all .2s;
    border-right: 3px solid transparent;
}

.sidebar-nav a:hover {
    background: var(--gray-800);
    color: #fff;
}

.sidebar-nav a.active {
    background: var(--gray-800);
    color: #fff;
    border-right-color: var(--primary);
}

.sidebar-nav a .icon {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-section {
    padding: 14px 20px 6px;
    font-size: .7rem;
    font-weight: 700;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-top: 1px solid var(--gray-700);
    margin-top: 8px;
}

/* ─── Main Content ─── */
.main-content {
    flex: 1;
    margin-right: var(--sidebar-w);
    padding: 0;
    min-height: 100vh;
    min-width: 0;
    overflow-x: hidden;
}

/* ─── Top Bar ─── */
.topbar {
    background: #fff;
    padding: 16px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar h1 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
}

.topbar-date {
    color: var(--gray-500);
    font-size: .9rem;
}

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

/* ─── Page Content ─── */
.page-content { padding: 30px; overflow-x: hidden; }

/* ─── Cards ─── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border-top: 3px solid var(--primary);
    transition: transform .2s, box-shadow .2s;
}

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

.stat-card.success { border-top-color: var(--success); }
.stat-card.danger { border-top-color: var(--danger); }
.stat-card.warning { border-top-color: var(--warning); }
.stat-card.info { border-top-color: var(--info); }

.stat-card .label {
    font-size: .85rem;
    color: var(--gray-500);
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--gray-900);
}

.stat-card .value.small { font-size: 1.2rem; }

.stat-card .sub {
    font-size: .8rem;
    color: var(--gray-400);
    margin-top: 4px;
}

/* ─── Card Container ─── */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-800);
}

.card-body { padding: 24px; }

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

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

table th {
    background: var(--gray-50);
    padding: 12px 16px;
    text-align: right;
    font-size: .85rem;
    font-weight: 600;
    color: var(--gray-600);
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}

table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-100);
    font-size: .9rem;
    color: var(--gray-700);
}

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

/* ─── Badges ─── */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 600;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-info { background: var(--info-light); color: var(--info); }
.badge-primary { background: var(--primary-light); color: var(--primary); }

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
    font-family: inherit;
    text-decoration: none;
}

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

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #047857; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}
.btn-outline:hover { background: var(--gray-100); }

.btn-sm { padding: 6px 14px; font-size: .8rem; }

/* ─── Forms ─── */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: .9rem;
    font-family: inherit;
    direction: rtl;
    transition: border-color .2s;
    background: #fff;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: left 12px center;
    padding-left: 32px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

/* ─── Modal ─── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 200;
    justify-content: center;
    align-items: center;
}

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

.modal {
    background: #fff;
    border-radius: var(--radius);
    width: 90%;
    max-width: 550px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
}

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.modal-close {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--gray-500);
    padding: 4px;
}

.modal-body { padding: 24px; }

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: 10px;
    justify-content: flex-start;
}

/* ─── Alert ─── */
.alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: .9rem;
    display: none;
}

.alert.show { display: block; }
.alert-success { background: var(--success-light); color: var(--success); }
.alert-danger { background: var(--danger-light); color: var(--danger); }
.alert-info { background: var(--info-light); color: var(--info); }

/* ─── Tax summary ─── */
.tax-summary {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.tax-box {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow);
}

.tax-box .amount {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 8px 0;
}

.tax-box .amount.positive { color: var(--danger); }
.tax-box .amount.negative { color: var(--success); }
.tax-box .desc { font-size: .85rem; color: var(--gray-500); }

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--gray-400);
}

.empty-state .icon { font-size: 3rem; margin-bottom: 12px; }

/* ─── Number formatting ─── */
.num { font-variant-numeric: tabular-nums; direction: ltr; display: inline-block; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(100%);
    }
    .sidebar.open { transform: translateX(0); }

    .main-content { margin-right: 0; }

    .menu-toggle { display: block; }

    .stats-grid { grid-template-columns: 1fr 1fr; }

    .tax-summary { grid-template-columns: 1fr; }

    .form-row { grid-template-columns: 1fr; }

    .page-content { padding: 16px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}

/* ─── Loading ─── */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-300);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin .6s linear infinite;
}

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