/* ============================================
   KITE — Multi-Branch Restaurant Management System
   Design System & Global Styles
   ============================================ */

/* ---- Google Font Import ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* — Primary Brand (Warm Orange) — */
    --color-primary: #D85C2A;
    --color-primary-dark: #B84A1E;
    --color-primary-light: #F5E6D8;
    --color-primary-rgb: 216, 92, 42;

    /* — Accent / Semantic — */
    --color-accent: #2E7D32;
    --color-accent-light: #E8F5E9;
    --color-warning: #F59E0B;
    --color-warning-light: #FFF8E1;
    --color-danger: #C0392B;
    --color-danger-light: #FDEDEC;
    --color-info: #D85C2A;
    --color-info-light: #FFF3E0;

    /* — Neutrals — */
    --color-dark: #1A1A1A;
    --color-medium: #555555;
    --color-text: #1A1A1A;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;

    /* — Backgrounds — */
    --color-bg: #FFFBF8;
    --color-card: #FFFFFF;
    --color-sidebar: #FFF8F5;
    --color-border: #E0D0C8;
    --color-border-light: #F0E8E2;
    --color-gray-light: #E8E0D8;
    --color-hover-bg: rgba(216, 92, 42, 0.06);

    /* — Typography — */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* — Spacing — */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-base: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* — Shadows — */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);

    /* — Border Radius — */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* — Transitions — */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* — Layout — */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --topbar-height: 60px;
}

/* ============================================
   2. RESET & BASE
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-dark);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}
h1 { font-size: var(--font-size-4xl); font-weight: 800; }
h2 { font-size: var(--font-size-3xl); font-weight: 700; }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-md); }

p {
    margin-bottom: var(--space-base);
    color: var(--color-text-secondary);
}

.text-primary { color: var(--color-primary); }
.text-accent  { color: var(--color-accent); }
.text-warning { color: var(--color-warning); }
.text-danger  { color: var(--color-danger); }
.text-muted   { color: var(--color-text-muted); }

/* ============================================
   4. LAYOUT — SIDEBAR + TOPBAR + CONTENT
   ============================================ */

/* -- 4.1 Sidebar -- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-sidebar);
    border-right: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: width var(--transition-base);
    overflow: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
    min-height: var(--topbar-height);
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    object-fit: contain;
    flex-shrink: 0;
}

.sidebar-brand {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-sm) 0;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}
.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

.nav-section {
    padding: var(--space-md) var(--space-lg) var(--space-xs);
}

.nav-section-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: 0;
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
    white-space: nowrap;
}

.nav-item:hover {
    color: var(--color-primary);
    background: var(--color-hover-bg);
}

.nav-item.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
    font-weight: 600;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: var(--font-size-md);
    flex-shrink: 0;
}

.nav-item .badge {
    margin-left: auto;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.65rem;
    padding: 2px 7px;
    border-radius: var(--radius-full);
    font-weight: 600;
}

/* -- 4.2 Topbar -- */
.topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    z-index: 999;
    transition: left var(--transition-base);
}

.sidebar.collapsed ~ .topbar {
    left: var(--sidebar-collapsed-width);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-base);
}

.topbar-toggle {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: var(--font-size-lg);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}
.topbar-toggle:hover {
    background: var(--color-hover-bg);
    color: var(--color-primary);
}

.topbar-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-dark);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topbar-branch-selector {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-primary-dark);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.topbar-branch-selector:hover {
    border-color: var(--color-primary);
}

.topbar-icon-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
}
.topbar-icon-btn:hover {
    background: var(--color-hover-bg);
    color: var(--color-primary);
}
.topbar-icon-btn .notification-dot {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    background: var(--color-danger);
    border-radius: 50%;
    border: 2px solid var(--color-card);
}

.topbar-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}
.topbar-avatar:hover {
    border-color: var(--color-primary);
}

/* -- 4.3 Main Content -- */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    padding: var(--space-xl);
    min-height: calc(100vh - var(--topbar-height));
    transition: margin-left var(--transition-base);
}

.sidebar.collapsed ~ .main-content,
.sidebar.collapsed ~ .topbar ~ .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* ============================================
   5. CARDS
   ============================================ */
.card {
    background: var(--color-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
    transition: box-shadow var(--transition-fast);
}
.card:hover {
    box-shadow: var(--shadow-sm);
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border-light);
    background: var(--color-bg);
}

/* -- KPI Stat Cards -- */
.stat-card {
    background: var(--color-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-base);
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-fast);
}
.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}
.stat-card-icon.primary  { background: var(--color-primary-light); color: var(--color-primary); }
.stat-card-icon.accent   { background: var(--color-accent-light); color: var(--color-accent); }
.stat-card-icon.warning  { background: var(--color-warning-light); color: var(--color-warning); }
.stat-card-icon.danger   { background: var(--color-danger-light); color: var(--color-danger); }

.stat-card-info h4 {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}
.stat-card-info .stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-dark);
}
.stat-card-info .stat-change {
    font-size: var(--font-size-xs);
    margin-top: var(--space-xs);
}
.stat-change.up   { color: var(--color-accent); }
.stat-change.down { color: var(--color-danger); }

/* ============================================
   6. BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.5rem 1.25rem;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
    line-height: 1.5;
}
.btn:active {
    transform: scale(0.97);
}

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

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

.btn-accent {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}
.btn-accent:hover {
    background: #256D27;
    border-color: #256D27;
    color: #fff;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}
.btn-danger:hover {
    background: #A93226;
    border-color: #A93226;
    color: #fff;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}
.btn-ghost:hover {
    background: var(--color-hover-bg);
    color: var(--color-primary);
}

.btn-sm {
    padding: 0.35rem 0.85rem;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 0.65rem 1.75rem;
    font-size: var(--font-size-md);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
}

/* ============================================
   7. FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.form-control {
    width: 100%;
    padding: 0.55rem 0.85rem;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    line-height: 1.5;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.12);
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

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

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-danger);
    margin-top: var(--space-xs);
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* ============================================
   8. TABLES
   ============================================ */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th {
    background: var(--color-bg);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
    padding: var(--space-md) var(--space-base);
    text-align: left;
    white-space: nowrap;
    border-bottom: 1px solid var(--color-border);
}

.table td {
    padding: var(--space-md) var(--space-base);
    border-bottom: 1px solid var(--color-border-light);
    vertical-align: middle;
}

.table tbody tr:hover {
    background: var(--color-hover-bg);
}

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

/* ============================================
   9. BADGES & STATUS
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.15rem 0.6rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary  { background: var(--color-primary-light); color: var(--color-primary); }
.badge-accent   { background: var(--color-accent-light); color: var(--color-accent); }
.badge-warning  { background: var(--color-warning-light); color: #B45309; }
.badge-danger   { background: var(--color-danger-light); color: var(--color-danger); }
.badge-gray     { background: var(--color-gray-light); color: var(--color-medium); }

/* ============================================
   10. TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 400px;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-base) var(--space-lg);
    background: var(--color-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid;
    animation: toast-slide-in 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.toast.toast-out {
    animation: toast-slide-out 0.25s ease-in forwards;
}

.toast-success  { border-left-color: var(--color-accent); }
.toast-error    { border-left-color: var(--color-danger); }
.toast-warning  { border-left-color: var(--color-warning); }
.toast-info     { border-left-color: var(--color-primary); }

.toast-icon {
    font-size: var(--font-size-lg);
    flex-shrink: 0;
    margin-top: 2px;
}
.toast-success .toast-icon  { color: var(--color-accent); }
.toast-error .toast-icon    { color: var(--color-danger); }
.toast-warning .toast-icon  { color: var(--color-warning); }
.toast-info .toast-icon     { color: var(--color-primary); }

.toast-body {
    flex: 1;
}

.toast-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 2px;
}

.toast-message {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.toast-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: var(--font-size-md);
    padding: 0;
    transition: color var(--transition-fast);
}
.toast-close:hover {
    color: var(--color-danger);
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    border-radius: 0 0 0 var(--radius-md);
    animation: toast-progress linear forwards;
}
.toast-success .toast-progress  { background: var(--color-accent); }
.toast-error .toast-progress    { background: var(--color-danger); }
.toast-warning .toast-progress  { background: var(--color-warning); }
.toast-info .toast-progress     { background: var(--color-primary); }

@keyframes toast-slide-in {
    from { transform: translateX(100%); opacity: 0; }
    to   { transform: translateX(0); opacity: 1; }
}
@keyframes toast-slide-out {
    from { transform: translateX(0); opacity: 1; }
    to   { transform: translateX(100%); opacity: 0; }
}
@keyframes toast-progress {
    from { width: 100%; }
    to   { width: 0%; }
}

/* ============================================
   11. MODALS / CONFIRMATION DIALOGS
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 480px;
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-base);
}
.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: var(--font-size-lg);
    margin: 0;
}

.modal-body {
    padding: var(--space-xl);
}

.modal-footer {
    padding: var(--space-base) var(--space-xl) var(--space-lg);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
}

/* ============================================
   12. PAGINATION
   ============================================ */
.pagination {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
}

.pagination a, .pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 34px;
    padding: 0 var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}
.pagination a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-hover-bg);
}
.pagination .active span {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ============================================
   13. UTILITIES
   ============================================ */
.d-flex      { display: flex; }
.d-grid      { display: grid; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm      { gap: var(--space-sm); }
.gap-md      { gap: var(--space-md); }
.gap-base    { gap: var(--space-base); }
.gap-lg      { gap: var(--space-lg); }
.text-center { text-align: center; }
.text-end    { text-align: right; }
.fw-500      { font-weight: 500; }
.fw-600      { font-weight: 600; }
.fw-700      { font-weight: 700; }
.mt-sm       { margin-top: var(--space-sm); }
.mt-base     { margin-top: var(--space-base); }
.mt-lg       { margin-top: var(--space-lg); }
.mb-sm       { margin-bottom: var(--space-sm); }
.mb-base     { margin-bottom: var(--space-base); }
.mb-lg       { margin-bottom: var(--space-lg); }
.w-full      { width: 100%; }

/* Grid system */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }

/* ============================================
   14. RTL SUPPORT
   ============================================ */
[dir="rtl"] .sidebar {
    left: auto;
    right: 0;
    border-right: none;
    border-left: 1px solid var(--color-border-light);
}

[dir="rtl"] .topbar {
    left: 0;
    right: var(--sidebar-width);
}

[dir="rtl"] .main-content {
    margin-left: 0;
    margin-right: var(--sidebar-width);
}

[dir="rtl"] .nav-item.active::before {
    left: auto;
    right: 0;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

[dir="rtl"] .toast-container {
    right: auto;
    left: var(--space-lg);
}

[dir="rtl"] .toast {
    border-left: none;
    border-right: 4px solid;
}

/* ============================================
   15. RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }
    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .topbar {
        left: 0;
    }

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

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .mobile-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.4);
        z-index: 999;
        display: none;
    }
    .sidebar.mobile-open ~ .mobile-overlay {
        display: block;
    }

    [dir="rtl"] .sidebar {
        transform: translateX(100%);
    }
    [dir="rtl"] .sidebar.mobile-open {
        transform: translateX(0);
    }
    [dir="rtl"] .topbar {
        right: 0;
    }
    [dir="rtl"] .main-content {
        margin-right: 0;
    }
}

/* ============================================
   16. LOADING SPINNER
   ============================================ */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

.btn .spinner {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

/* ============================================
   17. EMPTY STATES
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
}

.empty-state i {
    font-size: 3rem;
    color: var(--color-border);
    margin-bottom: var(--space-base);
}

.empty-state h4 {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    color: var(--color-text-muted);
    max-width: 360px;
    margin: 0 auto;
}