/* ============================================================
   Fly Optics Management System - Main Stylesheet
   ============================================================ */

/* ----------------------------------------------------------------
   1. CSS Variables
   ---------------------------------------------------------------- */
:root {
    --primary: #1E3A5F;
    --primary-light: #2C5282;
    --primary-dark: #152A45;
    --secondary: #4A90E2;
    --secondary-light: #6BA3E8;
    --secondary-dark: #3578CC;
    --accent: #00B4D8;
    --accent-light: #48CAE4;
    --accent-dark: #0096B7;
    --success: #2ECC71;
    --success-light: #58D68D;
    --success-dark: #27AE60;
    --warning: #F1C40F;
    --warning-light: #F4D03F;
    --warning-dark: #D4AC0D;
    --danger: #E74C3C;
    --danger-light: #EC7063;
    --danger-dark: #CB4335;
    --info: #3498DB;
    --info-light: #5DADE2;
    --info-dark: #2E86C1;

    --bg: #F5F7FA;
    --bg-secondary: #EDF0F5;
    --card-bg: #FFFFFF;
    --sidebar-bg: #1E3A5F;
    --sidebar-text: #CBD5E1;
    --sidebar-hover: #2C5282;
    --sidebar-active: #4A90E2;
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --navbar-height: 60px;

    --text: #333333;
    --text-light: #555555;
    --text-muted: #6c757d;
    --text-white: #FFFFFF;

    --border-color: #E2E8F0;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-sm: 4px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.2);

    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;

    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-family-ar: 'Segoe UI', 'Arial', sans-serif;
    --font-size-base: 14px;
    --font-size-sm: 12px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;
    --font-size-xxl: 24px;

    --z-sidebar: 1040;
    --z-navbar: 1030;
    --z-modal: 1060;
    --z-loading: 1070;
    --z-toast: 1080;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg: #0F172A;
    --bg-secondary: #1E293B;
    --card-bg: #1E293B;
    --sidebar-bg: #0F172A;
    --sidebar-text: #94A3B8;
    --sidebar-hover: #1E293B;
    --sidebar-active: #3B82F6;
    --text: #E2E8F0;
    --text-light: #CBD5E1;
    --text-muted: #94A3B8;
    --border-color: #334155;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
}

/* ----------------------------------------------------------------
   2. Reset & Body & Typography
   ---------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    transition: background-color var(--transition), color var(--transition);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--text);
    line-height: 1.3;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

a {
    color: var(--secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary);
    text-decoration: underline;
}

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

/* ----------------------------------------------------------------
   3. Login Page
   ---------------------------------------------------------------- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: loginBgPulse 8s ease-in-out infinite;
}

@keyframes loginBgPulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.login-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 40px;
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
    animation: slideInUp 0.5s ease;
}

.login-logo {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo img {
    height: 70px;
    margin-bottom: 10px;
}

.login-logo h1 {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 5px;
}

.login-logo p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.login-card .form-group {
    margin-bottom: 20px;
}

.login-card .form-control {
    height: 48px;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
    padding: 10px 16px;
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-card .form-control:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.15);
    outline: none;
}

.login-card .form-control-icon {
    position: relative;
}

.login-card .form-control-icon i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 2;
}

.login-card .form-control-icon .form-control {
    padding-left: 42px;
}

.login-card .btn-login {
    width: 100%;
    height: 48px;
    font-size: var(--font-size-lg);
    font-weight: 600;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: white;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.login-card .btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(30, 58, 95, 0.4);
}

.login-card .btn-login:active {
    transform: translateY(0);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

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

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    z-index: var(--z-sidebar);
    transition: width var(--transition), transform var(--transition);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.sidebar-header {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: 60px;
}

.sidebar-header img {
    height: 36px;
    flex-shrink: 0;
}

.sidebar-header .brand-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-header .brand-text small {
    display: block;
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--sidebar-text);
    opacity: 0.7;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.sidebar-nav .nav-section {
    padding: 8px 20px 4px;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: rgba(255, 255, 255, 0.35);
    font-weight: 600;
    white-space: nowrap;
}

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

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    gap: 12px;
    font-size: 0.9rem;
    white-space: nowrap;
}

.sidebar-nav .nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1rem;
    flex-shrink: 0;
    opacity: 0.8;
}

.sidebar-nav .nav-link:hover {
    background: var(--sidebar-hover);
    color: #fff;
    border-left-color: var(--accent);
    text-decoration: none;
}

.sidebar-nav .nav-link:hover i {
    opacity: 1;
}

.sidebar-nav .nav-link.active {
    background: var(--sidebar-hover);
    color: #fff;
    border-left-color: var(--sidebar-active);
    font-weight: 600;
}

.sidebar-nav .nav-link.active i {
    opacity: 1;
    color: var(--sidebar-active);
}

.sidebar-nav .nav-link .badge {
    margin-left: auto;
    font-size: 0.65rem;
    padding: 2px 6px;
}

.sidebar-footer {
    padding: 12px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.35);
    text-align: center;
    white-space: nowrap;
}

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

.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-section,
.sidebar.collapsed .nav-link span,
.sidebar.collapsed .sidebar-footer span {
    display: none;
}

.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 12px;
    border-left: none;
}

.sidebar.collapsed .nav-link i {
    margin: 0;
    font-size: 1.2rem;
}

.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 16px 10px;
}

.sidebar.collapsed .sidebar-header img {
    height: 30px;
}

.sidebar.collapsed .sidebar-header .brand-text {
    display: none;
}

/* ----------------------------------------------------------------
   5. Layout - Main Content & Navbar
   ---------------------------------------------------------------- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition);
}

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

.top-navbar {
    height: var(--navbar-height);
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: var(--z-navbar);
    box-shadow: var(--shadow-sm);
    gap: 16px;
}

.navbar-toggle {
    background: none;
    border: none;
    font-size: 1.3rem;
    color: var(--text);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--border-radius-sm);
    transition: background var(--transition-fast);
}

.navbar-toggle:hover {
    background: var(--bg);
}

.navbar-search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.navbar-search input {
    width: 100%;
    height: 38px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0 16px 0 38px;
    font-size: var(--font-size-sm);
    background: var(--bg);
    color: var(--text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.navbar-search input:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
    outline: none;
    background: var(--card-bg);
}

.navbar-search i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.search-form {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-results-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    max-height: 300px;
    overflow-y: auto;
    z-index: 1050;
    margin-top: 4px;
}

.search-result-item {
    display: block;
    padding: 10px 14px;
    text-decoration: none;
    color: var(--text);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: var(--bg-secondary);
}

.search-result-name {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.search-result-info {
    font-size: 12px;
    color: var(--text-muted);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.navbar-icon-btn {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    position: relative;
    transition: background var(--transition-fast), color var(--transition-fast);
    font-size: 1.1rem;
}

.navbar-icon-btn:hover {
    background: var(--bg);
    color: var(--text);
}

.navbar-icon-btn .notification-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid var(--card-bg);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 12px 4px 4px;
    border-radius: 30px;
    cursor: pointer;
    transition: background var(--transition-fast);
    border: none;
    background: transparent;
    color: var(--text);
}

.navbar-user:hover {
    background: var(--bg);
}

.navbar-user img {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.navbar-user .user-info {
    text-align: left;
    line-height: 1.2;
}

.navbar-user .user-info .name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: block;
}

.navbar-user .user-info .role {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* User dropdown */
.user-dropdown {
    position: absolute;
    top: calc(var(--navbar-height) - 4px);
    right: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: 8px 0;
    display: none;
    z-index: var(--z-navbar);
    animation: fadeInDown 0.2s ease;
}

.user-dropdown.show {
    display: block;
}

.user-dropdown .dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    color: var(--text);
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
    text-decoration: none;
}

.user-dropdown .dropdown-item:hover {
    background: var(--bg);
    color: var(--text);
    text-decoration: none;
}

.user-dropdown .dropdown-item i {
    width: 18px;
    text-align: center;
    color: var(--text-muted);
}

.user-dropdown .dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

/* Page content wrapper */
.page-content {
    flex: 1;
    padding: 24px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

/* ----------------------------------------------------------------
   6. Dashboard Cards
   ---------------------------------------------------------------- */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100%;
    background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,0.05) 100%);
    pointer-events: none;
}

.stat-card .stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-card .stat-icon.primary {
    background: rgba(30, 58, 95, 0.1);
    color: var(--primary);
}

.stat-card .stat-icon.secondary {
    background: rgba(74, 144, 226, 0.1);
    color: var(--secondary);
}

.stat-card .stat-icon.success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--success);
}

.stat-card .stat-icon.warning {
    background: rgba(241, 196, 15, 0.1);
    color: var(--warning);
}

.stat-card .stat-icon.danger {
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger);
}

.stat-card .stat-icon.accent {
    background: rgba(0, 180, 216, 0.1);
    color: var(--accent);
}

[data-theme="dark"] .stat-card .stat-icon.primary { background: rgba(74, 144, 226, 0.15); }
[data-theme="dark"] .stat-card .stat-icon.secondary { background: rgba(74, 144, 226, 0.15); }
[data-theme="dark"] .stat-card .stat-icon.success { background: rgba(46, 204, 113, 0.15); }
[data-theme="dark"] .stat-card .stat-icon.warning { background: rgba(241, 196, 15, 0.15); }
[data-theme="dark"] .stat-card .stat-icon.danger { background: rgba(231, 76, 60, 0.15); }
[data-theme="dark"] .stat-card .stat-icon.accent { background: rgba(0, 180, 216, 0.15); }

.stat-card .stat-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 2px;
    line-height: 1;
}

.stat-card .stat-info p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin: 0;
}

.stat-card .stat-trend {
    position: absolute;
    bottom: 10px;
    right: 16px;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 3px;
}

.stat-card .stat-trend.up { color: var(--success); }
.stat-card .stat-trend.down { color: var(--danger); }

/* ----------------------------------------------------------------
   7. Chart Containers
   ---------------------------------------------------------------- */
.chart-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    padding: 20px;
    margin-bottom: 24px;
}

.chart-card .chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.chart-card .chart-header h5 {
    font-weight: 600;
    font-size: 1rem;
}

.chart-card .chart-body {
    position: relative;
    width: 100%;
    min-height: 300px;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

/* ----------------------------------------------------------------
   8. Receipt Form Styling
   ---------------------------------------------------------------- */
.receipt-page {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0;
    min-height: calc(100vh - var(--navbar-height) - 48px);
}

/* Button Sidebar */
.receipt-sidebar {
    width: 56px;
    background: var(--primary);
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 0;
    gap: 4px;
}

.receipt-sidebar .btn-sidebar {
    width: 42px;
    height: 42px;
    border: none;
    border-radius: var(--border-radius-sm);
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.receipt-sidebar .btn-sidebar:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.receipt-sidebar .btn-sidebar.active {
    background: var(--accent);
    color: #fff;
}

.receipt-sidebar .sidebar-divider {
    width: 28px;
    height: 1px;
    background: rgba(255, 255, 255, 0.2);
    margin: 4px 0;
}

/* Receipt Main Content */
.receipt-main {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.receipt-form-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--border-color);
}

.receipt-form-header .receipt-number {
    font-weight: 700;
    font-size: 1rem;
    color: var(--primary);
}

.receipt-form-header .receipt-date {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.receipt-form-body {
    padding: 20px;
    flex: 1;
}

/* Patient Info Section */
.patient-info-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.patient-info-section .info-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.patient-info-section .info-row label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.patient-info-section .info-row .form-control,
.patient-info-section .info-row .form-select {
    height: 36px;
    font-size: var(--font-size-sm);
}

/* Eye Examination Table */
.eye-exam-section {
    margin-bottom: 20px;
}

.eye-exam-section .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--success);
    color: #fff;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    font-weight: 600;
    font-size: 0.9rem;
}

.eye-exam-section .section-header i {
    margin-right: 8px;
}

.eye-exam-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
}

.eye-exam-table th {
    background: var(--bg);
    padding: 8px 12px;
    text-align: center;
    font-weight: 600;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    font-size: 0.8rem;
    white-space: nowrap;
}

.eye-exam-table td {
    padding: 6px 8px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.eye-exam-table td input,
.eye-exam-table td select {
    width: 100%;
    min-width: 60px;
    height: 32px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0 4px;
    font-size: var(--font-size-sm);
    background: var(--card-bg);
    color: var(--text);
    transition: border-color var(--transition-fast);
}

.eye-exam-table td input:focus,
.eye-exam-table td select:focus {
    border-color: var(--secondary);
    outline: none;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.1);
}

.eye-exam-table .eye-label {
    font-weight: 700;
    color: var(--primary);
    background: rgba(30, 58, 95, 0.05);
    min-width: 80px;
}

.eye-exam-table .pd-row td {
    background: var(--bg);
    font-weight: 600;
}

/* Products / Lenses Table */
.receipt-items-section {
    margin-bottom: 20px;
}

.receipt-items-section .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--secondary);
    color: #fff;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    font-weight: 600;
    font-size: 0.9rem;
}

.receipt-items-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
}

.receipt-items-table th {
    background: var(--bg);
    padding: 8px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.receipt-items-table td {
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    vertical-align: middle;
}

.receipt-items-table td input,
.receipt-items-table td select {
    width: 100%;
    height: 32px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0 8px;
    font-size: var(--font-size-sm);
    background: var(--card-bg);
    color: var(--text);
}

.receipt-items-table td input:focus,
.receipt-items-table td select:focus {
    border-color: var(--secondary);
    outline: none;
}

.receipt-items-table .btn-remove-row {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    background: var(--danger);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    transition: background var(--transition-fast);
}

.receipt-items-table .btn-remove-row:hover {
    background: var(--danger-dark);
}

.receipt-items-table .total-row td {
    background: var(--bg);
    font-weight: 700;
    text-align: right;
    font-size: 0.95rem;
}

/* Financial Summary */
.financial-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    padding: 16px;
    background: var(--bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.financial-summary .summary-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.financial-summary .summary-item label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 600;
}

.financial-summary .summary-item .form-control {
    height: 36px;
    font-weight: 700;
}

.financial-summary .summary-item.remaining .form-control {
    color: var(--success);
    font-size: 1.1rem;
}

/* Notes / Notes textarea */
.receipt-notes {
    margin-bottom: 20px;
}

.receipt-notes textarea {
    width: 100%;
    min-height: 80px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 10px 14px;
    font-size: var(--font-size-sm);
    resize: vertical;
    background: var(--card-bg);
    color: var(--text);
    transition: border-color var(--transition-fast);
}

.receipt-notes textarea:focus {
    border-color: var(--secondary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Right Panel - Today's Totals */
.receipt-right-panel {
    width: 260px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 1px solid var(--border-color);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.receipt-right-panel .panel-title {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--primary);
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.totals-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.totals-list .total-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed var(--border-color);
}

.totals-list .total-item:last-child {
    border-bottom: none;
}

.totals-list .total-item .label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.totals-list .total-item .value {
    font-weight: 700;
    font-size: 0.95rem;
}

.totals-list .total-item.highlight .value {
    color: var(--success);
    font-size: 1.1rem;
}

/* Navigation bar at bottom */
.receipt-nav-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg);
    border-top: 1px solid var(--border-color);
}

.receipt-nav-bar .btn {
    padding: 6px 16px;
    font-size: var(--font-size-sm);
}

.receipt-nav-bar .nav-info {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin: 0 12px;
    font-weight: 600;
}

/* ----------------------------------------------------------------
   9. Form Inputs (Bootstrap Overrides)
   ---------------------------------------------------------------- */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
    display: block;
}

.form-control,
.form-select {
    display: block;
    width: 100%;
    height: 40px;
    padding: 8px 14px;
    font-size: var(--font-size-base);
    color: var(--text);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    line-height: 1.5;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.12);
    outline: none;
}

.form-control:disabled,
.form-control[readonly] {
    background: var(--bg);
    opacity: 0.7;
}

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

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.12);
}

.form-control.is-valid {
    border-color: var(--success);
}

.form-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.invalid-feedback {
    font-size: 0.75rem;
    color: var(--danger);
    margin-top: 4px;
}

/* Floating labels */
.floating-label {
    position: relative;
}

.floating-label .form-control {
    padding-top: 20px;
    padding-bottom: 4px;
}

.floating-label label {
    position: absolute;
    top: 50%;
    left: 14px;
    transform: translateY(-50%);
    font-size: var(--font-size-base);
    color: var(--text-muted);
    pointer-events: none;
    transition: all var(--transition-fast);
    background: transparent;
    padding: 0 4px;
}

.floating-label .form-control:focus ~ label,
.floating-label .form-control:not(:placeholder-shown) ~ label {
    top: 8px;
    transform: translateY(0);
    font-size: 0.7rem;
    color: var(--secondary);
    font-weight: 600;
}

/* Input group */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    border-radius: 0;
}

.input-group .form-control:first-child {
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.input-group .form-control:last-child {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0 14px;
    background: var(--bg);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.input-group .input-group-text:first-child {
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.input-group .input-group-text:last-child {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* ----------------------------------------------------------------
   10. Tables
   ---------------------------------------------------------------- */
.table-container {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-bottom: 24px;
}

.table-container .table-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
}

.table-container .table-header h5 {
    font-weight: 600;
    font-size: 1rem;
    margin: 0;
}

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

.table thead th {
    background: var(--bg);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.table tbody tr:hover {
    background: rgba(74, 144, 226, 0.04);
}

.table-striped tbody tr:nth-of-type(odd) {
    background: rgba(0, 0, 0, 0.01);
}

[data-theme="dark"] .table-striped tbody tr:nth-of-type(odd) {
    background: rgba(255, 255, 255, 0.02);
}

.table .actions {
    display: flex;
    gap: 4px;
}

.table .actions .btn {
    padding: 4px 8px;
    font-size: 0.8rem;
}

/* DataTables overrides */
.dataTables_wrapper {
    padding: 0 16px 16px;
}

.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter {
    padding: 12px 16px;
}

.dataTables_wrapper .dataTables_length select {
    height: 34px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0 8px;
    font-size: var(--font-size-sm);
    background: var(--card-bg);
    color: var(--text);
}

.dataTables_wrapper .dataTables_filter input {
    height: 34px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0 12px;
    font-size: var(--font-size-sm);
    background: var(--card-bg);
    color: var(--text);
    margin-left: 8px;
}

.dataTables_wrapper .dataTables_info {
    padding: 12px 16px;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.dataTables_wrapper .dataTables_paginate {
    padding: 12px 16px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    padding: 4px 12px;
    margin: 0 2px;
    border-radius: var(--border-radius-sm) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text) !important;
    background: var(--card-bg) !important;
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--secondary) !important;
    color: #fff !important;
    border-color: var(--secondary) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary) !important;
    color: #fff !important;
    border-color: var(--primary) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

table.dataTable thead .sorting,
table.dataTable thead .sorting_asc,
table.dataTable thead .sorting_desc {
    cursor: pointer;
}

table.dataTable thead .sorting::after { content: '\21\20'; opacity: 0.3; }
table.dataTable thead .sorting_asc::after { content: '\21\91'; opacity: 0.8; }
table.dataTable thead .sorting_desc::after { content: '\21\93'; opacity: 0.8; }

table.dataTable thead .sorting::after,
table.dataTable thead .sorting_asc::after,
table.dataTable thead .sorting_desc::after {
    display: inline-block;
    margin-left: 4px;
}

/* ----------------------------------------------------------------
   11. Report Styling & Print
   ---------------------------------------------------------------- */
.report-container {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    padding: 32px;
    margin-bottom: 24px;
}

.report-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--primary);
}

.report-header .report-logo img {
    height: 50px;
}

.report-header .report-title {
    text-align: center;
    flex: 1;
}

.report-header .report-title h2 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-bottom: 4px;
}

.report-header .report-title p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.report-header .report-date {
    text-align: right;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.report-filters {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bg);
    border-radius: var(--border-radius);
    flex-wrap: wrap;
    align-items: flex-end;
}

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

.report-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.report-table th {
    background: var(--primary);
    color: #fff;
    padding: 10px 14px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-align: left;
    border: 1px solid var(--primary-dark);
}

.report-table td {
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
}

.report-table tbody tr:nth-child(even) {
    background: rgba(30, 58, 95, 0.03);
}

.report-table tfoot td {
    background: var(--bg);
    font-weight: 700;
    border-top: 2px solid var(--primary);
}

/* A4 Print Layout */
.report-a4 {
    max-width: 210mm;
    margin: 0 auto;
    padding: 15mm;
    background: #fff;
    color: #000;
    box-shadow: var(--shadow-lg);
}

@media print {
    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 12pt;
    }

    .sidebar,
    .top-navbar,
    .page-header .btn,
    .report-filters,
    .no-print,
    .receipt-sidebar,
    .receipt-nav-bar,
    .receipt-right-panel,
    #back-to-top,
    .swal2-container,
    .toast-container {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
        padding: 0 !important;
    }

    .page-content {
        padding: 0 !important;
    }

    .report-container,
    .report-a4 {
        box-shadow: none !important;
        margin: 0 !important;
        padding: 0 !important;
        border: none !important;
    }

    .report-table th {
        background: #333 !important;
        color: #fff !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .report-table tbody tr:nth-child(even) {
        background: #f5f5f5 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .stat-cards {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
    }

    .stat-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .chart-card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }

    .app-wrapper {
        display: block;
    }

    a[href]::after {
        content: none !important;
    }

    @page {
        margin: 10mm;
        size: A4;
    }
}

/* ----------------------------------------------------------------
   12. Cards
   ---------------------------------------------------------------- */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
    transition: box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow);
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h5 {
    font-weight: 600;
    font-size: 1rem;
    margin: 0;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    background: var(--bg);
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}

.card-accent {
    border-top: 3px solid var(--secondary);
}

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

/* ----------------------------------------------------------------
   13. Buttons
   ---------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    line-height: 1.5;
    white-space: nowrap;
    user-select: none;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.25);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 10px 24px;
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

/* Primary */
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

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

/* Secondary */
.btn-secondary {
    background: var(--secondary);
    color: #fff;
    border-color: var(--secondary);
}

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

/* Success */
.btn-success {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
}

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

/* Danger */
.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

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

/* Warning */
.btn-warning {
    background: var(--warning);
    color: #333;
    border-color: var(--warning);
}

.btn-warning:hover {
    background: var(--warning-dark);
    border-color: var(--warning-dark);
    color: #333;
}

/* Info */
.btn-info {
    background: var(--info);
    color: #fff;
    border-color: var(--info);
}

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

/* Outline */
.btn-outline-primary {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-outline-secondary {
    background: transparent;
    color: var(--secondary);
    border-color: var(--secondary);
}

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

.btn-outline-success {
    background: transparent;
    color: var(--success);
    border-color: var(--success);
}

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

.btn-outline-danger {
    background: transparent;
    color: var(--danger);
    border-color: var(--danger);
}

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

.btn-outline-light {
    background: transparent;
    color: var(--text);
    border-color: var(--border-color);
}

.btn-outline-light:hover {
    background: var(--bg);
}

/* Icon button */
.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 50%;
}

.btn-icon.btn-sm {
    width: 28px;
    height: 28px;
}

/* ----------------------------------------------------------------
   14. Modal Overrides
   ---------------------------------------------------------------- */
.modal-backdrop {
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
}

.modal {
    z-index: calc(var(--z-modal) + 1);
}

.modal-dialog {
    display: flex;
    align-items: center;
    min-height: calc(100vh - 1rem);
    margin: 0.5rem auto;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    border: none;
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
    animation: modalSlideIn 0.3s ease;
}

.modal-content.modal-lg {
    max-width: 800px;
}

.modal-content.modal-xl {
    max-width: 1000px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h5 {
    font-weight: 700;
    font-size: 1.1rem;
    margin: 0;
}

.modal-header .btn-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-muted);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.modal-header .btn-close:hover {
    background: var(--bg);
    color: var(--text);
}

.modal-body {
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ----------------------------------------------------------------
   15. SweetAlert2 Custom Styling
   ---------------------------------------------------------------- */
.swal2-popup {
    border-radius: var(--border-radius-lg) !important;
    box-shadow: var(--shadow-xl) !important;
    font-family: var(--font-family) !important;
    padding: 24px !important;
}

[data-theme="dark"] .swal2-popup {
    background: var(--card-bg) !important;
    color: var(--text) !important;
}

.swal2-title {
    color: var(--text) !important;
    font-weight: 700 !important;
}

.swal2-html-container {
    color: var(--text-muted) !important;
    margin: 12px 0 !important;
}

.swal2-styled {
    border-radius: var(--border-radius) !important;
    font-weight: 600 !important;
    padding: 10px 24px !important;
    font-size: var(--font-size-sm) !important;
    box-shadow: none !important;
}

.swal2-styled:focus {
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.25) !important;
}

.swal2-confirm {
    background: var(--primary) !important;
}

.swal2-cancel {
    background: var(--bg) !important;
    color: var(--text) !important;
    border: 1px solid var(--border-color) !important;
}

.swal2-deny {
    background: var(--danger) !important;
}

.swal2-icon {
    margin: 0 auto 16px !important;
}

/* ----------------------------------------------------------------
   16. Loading Spinner / Overlay
   ---------------------------------------------------------------- */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-spinner-sm {
    width: 24px;
    height: 24px;
    border-width: 3px;
}

.loading-spinner-lg {
    width: 64px;
    height: 64px;
    border-width: 5px;
}

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

.btn .spinner-border {
    width: 16px;
    height: 16px;
    border-width: 2px;
    margin-right: 4px;
}

/* Inline loading */
.loading-inline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

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

/* ----------------------------------------------------------------
   17. Dark Mode Complete Theme
   ---------------------------------------------------------------- */
[data-theme="dark"] .sidebar {
    background: #0F172A;
    border-right-color: #1E293B;
}

[data-theme="dark"] .top-navbar {
    background: #1E293B;
    border-bottom-color: #334155;
}

[data-theme="dark"] .card {
    background: #1E293B;
    border-color: #334155;
}

[data-theme="dark"] .card-header {
    border-bottom-color: #334155;
}

[data-theme="dark"] .card-footer {
    background: #0F172A;
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background: #0F172A;
    border-color: #334155;
    color: #E2E8F0;
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background: #1E293B;
}

[data-theme="dark"] .table thead th {
    background: #0F172A;
    border-bottom-color: #334155;
    color: #94A3B8;
}

[data-theme="dark"] .table tbody td {
    border-bottom-color: #334155;
}

[data-theme="dark"] .table-striped tbody tr:nth-of-type(odd) {
    background: rgba(255, 255, 255, 0.02);
}

[data-theme="dark"] .table tbody tr:hover {
    background: rgba(74, 144, 226, 0.08);
}

[data-theme="dark"] .modal-content {
    background: #1E293B;
    border-color: #334155;
}

[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
    border-color: #334155;
}

[data-theme="dark"] .dropdown-menu {
    background: #1E293B;
    border-color: #334155;
}

[data-theme="dark"] .dropdown-item {
    color: #E2E8F0;
}

[data-theme="dark"] .dropdown-item:hover {
    background: #334155;
    color: #fff;
}

[data-theme="dark"] .input-group-text {
    background: #0F172A;
    border-color: #334155;
    color: #94A3B8;
}

[data-theme="dark"] .navbar-search input {
    background: #0F172A;
    border-color: #334155;
    color: #E2E8F0;
}

[data-theme="dark"] .login-card {
    background: #1E293B;
}

[data-theme="dark"] .receipt-form-body {
    color: #E2E8F0;
}

[data-theme="dark"] .eye-exam-table td input,
[data-theme="dark"] .eye-exam-table td select,
[data-theme="dark"] .receipt-items-table td input,
[data-theme="dark"] .receipt-items-table td select {
    background: #0F172A;
    border-color: #334155;
    color: #E2E8F0;
}

[data-theme="dark"] .report-a4 {
    background: #1E293B;
    color: #E2E8F0;
}

/* ----------------------------------------------------------------
   18. RTL Support
   ---------------------------------------------------------------- */
.rtl {
    direction: rtl;
    text-align: right;
}

.rtl .sidebar {
    left: auto;
    right: 0;
    border-right: none;
    border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.rtl .main-content {
    margin-left: 0;
    margin-right: var(--sidebar-width);
}

.rtl .sidebar.collapsed ~ .main-content,
.rtl .main-content.sidebar-collapsed {
    margin-right: var(--sidebar-collapsed-width);
    margin-left: 0;
}

.rtl .sidebar-nav .nav-link {
    border-left: none;
    border-right: 3px solid transparent;
}

.rtl .sidebar-nav .nav-link:hover {
    border-left-color: transparent;
    border-right-color: var(--accent);
}

.rtl .sidebar-nav .nav-link.active {
    border-left-color: transparent;
    border-right-color: var(--sidebar-active);
}

.rtl .sidebar-nav .nav-link i {
    margin-right: 0;
    margin-left: 8px;
}

.rtl .navbar-search input {
    padding: 0 38px 0 16px;
}

.rtl .navbar-search i {
    left: auto;
    right: 14px;
}

.rtl .navbar-right {
    margin-left: 0;
    margin-right: auto;
}

.rtl .form-control-icon i {
    left: auto;
    right: 14px;
}

.rtl .form-control-icon .form-control {
    padding-left: 14px;
    padding-right: 42px;
}

.rtl .user-dropdown {
    right: auto;
    left: 20px;
}

.rtl .receipt-sidebar {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.rtl .receipt-right-panel {
    border-left: none;
    border-right: 1px solid var(--border-color);
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

/* ----------------------------------------------------------------
   19. Responsive Breakpoints
   ---------------------------------------------------------------- */

/* Tablet (max-width: 992px) */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .sidebar.collapsed {
        transform: translateX(-100%);
        width: var(--sidebar-width);
    }

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

    .rtl .main-content {
        margin-right: 0 !important;
    }

    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .receipt-page {
        grid-template-columns: 1fr;
    }

    .receipt-sidebar {
        flex-direction: row;
        width: 100%;
        border-radius: var(--border-radius) var(--border-radius) 0 0;
        overflow-x: auto;
    }

    .receipt-right-panel {
        width: 100%;
        border-radius: 0 0 var(--border-radius) var(--border-radius);
        border-left: 1px solid var(--border-color);
    }

    .report-header {
        flex-direction: column;
        gap: 12px;
    }

    .report-header .report-date {
        text-align: left;
    }

    .rtl .report-header .report-date {
        text-align: right;
    }

    .patient-info-section {
        grid-template-columns: 1fr;
    }

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

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    :root {
        --font-size-base: 13px;
    }

    .stat-cards {
        grid-template-columns: 1fr;
    }

    .page-content {
        padding: 16px;
    }

    .top-navbar {
        padding: 0 12px;
    }

    .navbar-search {
        display: none;
    }

    .navbar-user .user-info {
        display: none;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .page-header .btn {
        width: 100%;
    }

    .report-container {
        padding: 16px;
    }

    .report-filters {
        flex-direction: column;
    }

    .report-filters .form-group {
        width: 100%;
    }

    .modal-dialog {
        margin: 0.5rem;
    }

    .modal-content {
        max-height: 90vh;
        overflow-y: auto;
    }

    .eye-exam-table {
        display: block;
        overflow-x: auto;
    }

    .receipt-items-table {
        display: block;
        overflow-x: auto;
    }

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

    .login-card {
        padding: 24px;
    }

    .login-card h1 {
        font-size: 1.3rem;
    }
}

/* Desktop (min-width: 1200px) */
@media (min-width: 1200px) {
    .stat-cards {
        grid-template-columns: repeat(4, 1fr);
    }

    .charts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Large desktop (min-width: 1400px) */
@media (min-width: 1400px) {
    .page-content {
        padding: 32px;
    }

    .report-container {
        padding: 40px;
    }
}

/* ----------------------------------------------------------------
   20. Animations
   ---------------------------------------------------------------- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
        transform: translateY(0);
    }
    40%, 43% {
        animation-timing-function: cubic-bezier(0.755, 0.05, 0.855, 0.06);
        transform: translateY(-12px);
    }
    70% {
        animation-timing-function: cubic-bezier(0.755, 0.05, 0.855, 0.06);
        transform: translateY(-6px);
    }
    90% {
        transform: translateY(-2px);
    }
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fadeIn { animation: fadeIn 0.3s ease; }
.animate-fadeInUp { animation: fadeInUp 0.4s ease; }
.animate-fadeInDown { animation: fadeInDown 0.3s ease; }
.animate-fadeInLeft { animation: fadeInLeft 0.4s ease; }
.animate-fadeInRight { animation: fadeInRight 0.4s ease; }
.animate-slideInUp { animation: slideInUp 0.4s ease; }
.animate-slideInDown { animation: slideInDown 0.3s ease; }
.animate-bounce { animation: bounce 0.6s ease; }
.animate-pulse { animation: pulse 0.3s ease; }
.animate-shake { animation: shake 0.4s ease; }
.animate-zoomIn { animation: zoomIn 0.3s ease; }

/* Stagger children animations */
.stagger-children > * {
    opacity: 0;
    animation: fadeInUp 0.4s ease forwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.4s; }

/* ----------------------------------------------------------------
   21. QR Code Container
   ---------------------------------------------------------------- */
.qr-code-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg);
    min-width: 150px;
    min-height: 150px;
}

.qr-code-container canvas,
.qr-code-container img {
    max-width: 150px;
    max-height: 150px;
}

.qr-code-container .qr-label {
    margin-top: 8px;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-align: center;
}

.qr-code-container .qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.qr-code-container .qr-placeholder i {
    font-size: 2rem;
    opacity: 0.4;
}

/* ----------------------------------------------------------------
   22. Toast Notifications
   ---------------------------------------------------------------- */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 380px;
}

.rtl .toast-container {
    right: auto;
    left: 20px;
}

.toast {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    min-width: 300px;
    animation: slideInRight 0.3s ease;
    border-left: 4px solid var(--info);
}

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

.rtl .toast {
    border-left: none;
    border-right: 4px solid var(--info);
}

.rtl .toast.toast-success { border-right-color: var(--success); }
.rtl .toast.toast-error { border-right-color: var(--danger); }
.rtl .toast.toast-warning { border-right-color: var(--warning); }
.rtl .toast.toast-info { border-right-color: var(--info); }

.toast-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--danger); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info .toast-icon { color: var(--info); }

.toast-body {
    flex: 1;
}

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

.toast-message {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    font-size: 1rem;
    line-height: 1;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

.toast-close:hover {
    opacity: 1;
}

.toast-progress {
    height: 3px;
    background: var(--border-color);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    margin-top: 8px;
    overflow: hidden;
}

.toast-progress .progress-bar {
    height: 100%;
    transition: width linear;
}

.toast-success .progress-bar { background: var(--success); }
.toast-error .progress-bar { background: var(--danger); }
.toast-warning .progress-bar { background: var(--warning); }
.toast-info .progress-bar { background: var(--info); }

/* ----------------------------------------------------------------
   23. Breadcrumb Styling
   ---------------------------------------------------------------- */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    padding: 0;
    margin: 0 0 16px 0;
    list-style: none;
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb-item a {
    color: var(--secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary);
    text-decoration: underline;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: '/';
    color: var(--text-muted);
    margin: 0 4px;
    font-size: 0.8rem;
}

.breadcrumb-item.active {
    color: var(--text-muted);
    font-weight: 500;
}

/* ----------------------------------------------------------------
   24. Badge Styling
   ---------------------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 0.7rem;
    font-weight: 600;
    line-height: 1.4;
    border-radius: 10px;
    white-space: nowrap;
    vertical-align: middle;
}

.badge-primary {
    background: rgba(30, 58, 95, 0.1);
    color: var(--primary);
}

.badge-secondary {
    background: rgba(74, 144, 226, 0.1);
    color: var(--secondary);
}

.badge-success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--success-dark);
}

.badge-warning {
    background: rgba(241, 196, 15, 0.15);
    color: #9A7D0A;
}

.badge-danger {
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger);
}

.badge-info {
    background: rgba(52, 152, 219, 0.1);
    color: var(--info);
}

.badge-light {
    background: var(--bg);
    color: var(--text-muted);
}

.badge-dark {
    background: #333;
    color: #fff;
}

.badge-pill {
    border-radius: 20px;
    padding: 3px 10px;
}

/* ----------------------------------------------------------------
   25. Pagination
   ---------------------------------------------------------------- */
.pagination {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.pagination .page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
    background: var(--card-bg);
}

.pagination .page-link:hover {
    background: var(--bg);
    border-color: var(--secondary);
    color: var(--secondary);
}

.pagination .page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 600;
}

.pagination .page-item.disabled .page-link {
    opacity: 0.4;
    pointer-events: none;
}

/* ----------------------------------------------------------------
   26. Dropdown Menus
   ---------------------------------------------------------------- */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1050;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    padding: 6px 0;
    margin-top: 4px;
    display: none;
    animation: fadeInDown 0.2s ease;
}

.dropdown-menu.show {
    display: block;
}

.dropdown-menu .dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    color: var(--text);
    text-decoration: none;
    transition: background var(--transition-fast);
    cursor: pointer;
}

.dropdown-menu .dropdown-item:hover {
    background: var(--bg);
    color: var(--text);
    text-decoration: none;
}

.dropdown-menu .dropdown-item i {
    width: 18px;
    text-align: center;
    color: var(--text-muted);
}

.dropdown-menu .dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

.dropdown-menu-right {
    left: auto;
    right: 0;
}

/* ----------------------------------------------------------------
   27. Scrollbar Styling
   ---------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: #1E293B;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #475569;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #64748B;
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--bg);
}

/* ----------------------------------------------------------------
   28. Back to Top Button
   ---------------------------------------------------------------- */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#back-to-top:hover {
    background: var(--secondary);
    transform: translateY(-3px);
}

.rtl #back-to-top {
    right: auto;
    left: 30px;
}

/* ----------------------------------------------------------------
   29. Utility Classes
   ---------------------------------------------------------------- */
.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--secondary) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }
.rtl .text-right { text-align: left !important; }
.text-left { text-align: left !important; }
.rtl .text-left { text-align: right !important; }
.fw-bold { font-weight: 700 !important; }
.fw-semibold { font-weight: 600 !important; }
.fw-medium { font-weight: 500 !important; }
.fw-normal { font-weight: 400 !important; }
.fs-sm { font-size: var(--font-size-sm) !important; }
.fs-lg { font-size: var(--font-size-lg) !important; }
.fs-xl { font-size: var(--font-size-xl) !important; }
.lh-1 { line-height: 1 !important; }
.lh-sm { line-height: 1.2 !important; }
.lh-lg { line-height: 1.8 !important; }

.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }
.d-grid { display: grid !important; }
.d-inline-block { display: inline-block !important; }

.flex-column { flex-direction: column !important; }
.flex-row { flex-direction: row !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-1 { flex: 1 !important; }
.align-items-center { align-items: center !important; }
.align-items-start { align-items: flex-start !important; }
.align-items-end { align-items: flex-end !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-end { justify-content: flex-end !important; }
.gap-1 { gap: 4px !important; }
.gap-2 { gap: 8px !important; }
.gap-3 { gap: 12px !important; }
.gap-4 { gap: 16px !important; }

.m-0 { margin: 0 !important; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.ms-0 { margin-left: 0 !important; }
.mr-0 { margin-right: 0 !important; }
.mt-1 { margin-top: 4px !important; }
.mb-1 { margin-bottom: 4px !important; }
.mt-2 { margin-top: 8px !important; }
.mb-2 { margin-bottom: 8px !important; }
.mt-3 { margin-top: 12px !important; }
.mb-3 { margin-bottom: 12px !important; }
.mt-4 { margin-top: 16px !important; }
.mb-4 { margin-bottom: 16px !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 4px !important; }
.p-2 { padding: 8px !important; }
.p-3 { padding: 12px !important; }
.p-4 { padding: 16px !important; }
.px-3 { padding-left: 12px !important; padding-right: 12px !important; }
.py-3 { padding-top: 12px !important; padding-bottom: 12px !important; }

.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }
.overflow-hidden { overflow: hidden !important; }
.overflow-auto { overflow: auto !important; }
.position-relative { position: relative !important; }
.position-absolute { position: absolute !important; }
.rounded { border-radius: var(--border-radius) !important; }
.rounded-lg { border-radius: var(--border-radius-lg) !important; }
.rounded-circle { border-radius: 50% !important; }
.border { border: 1px solid var(--border-color) !important; }
.border-0 { border: 0 !important; }
.border-top { border-top: 1px solid var(--border-color) !important; }
.border-bottom { border-bottom: 1px solid var(--border-color) !important; }
.shadow { box-shadow: var(--shadow) !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.visible { visibility: visible !important; }
.invisible { visibility: hidden !important; }
.opacity-0 { opacity: 0 !important; }
.opacity-50 { opacity: 0.5 !important; }
.opacity-100 { opacity: 1 !important; }

.pointer { cursor: pointer !important; }
.select-none { user-select: none !important; }
.no-select { user-select: none !important; }

/* ----------------------------------------------------------------
   30. Specific Component Overrides
   ---------------------------------------------------------------- */

/* Tab navigation */
.nav-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    list-style: none;
    padding: 0;
    margin: 0;
    gap: 0;
}

.nav-tabs .nav-item {
    list-style: none;
}

.nav-tabs .nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-tabs .nav-link:hover {
    color: var(--secondary);
    border-bottom-color: rgba(74, 144, 226, 0.3);
    text-decoration: none;
}

.nav-tabs .nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

.tab-content {
    padding: 20px 0;
}

/* Alert styling */
.alert {
    padding: 12px 16px;
    border-radius: var(--border-radius);
    border: 1px solid transparent;
    font-size: var(--font-size-sm);
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert-success {
    background: rgba(46, 204, 113, 0.1);
    border-color: rgba(46, 204, 113, 0.3);
    color: var(--success-dark);
}

.alert-danger {
    background: rgba(231, 76, 60, 0.1);
    border-color: rgba(231, 76, 60, 0.3);
    color: var(--danger);
}

.alert-warning {
    background: rgba(241, 196, 15, 0.1);
    border-color: rgba(241, 196, 15, 0.3);
    color: #9A7D0A;
}

.alert-info {
    background: rgba(52, 152, 219, 0.1);
    border-color: rgba(52, 152, 219, 0.3);
    color: var(--info-dark);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    opacity: 0.3;
    margin-bottom: 16px;
    display: block;
}

.empty-state h5 {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.empty-state p {
    font-size: var(--font-size-sm);
    max-width: 300px;
    margin: 0 auto;
}

/* Avatar */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.avatar-sm {
    width: 28px;
    height: 28px;
}

.avatar-lg {
    width: 56px;
    height: 56px;
}

.avatar-xl {
    width: 80px;
    height: 80px;
}

/* Divider */
.divider {
    height: 1px;
    background: var(--border-color);
    margin: 16px 0;
    border: none;
}

/* Skeleton loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg) 25%, var(--bg-secondary) 50%, var(--bg) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--border-radius-sm);
}

.skeleton-text {
    height: 14px;
    margin-bottom: 8px;
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: 12px;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-card {
    height: 120px;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Quantity input */
.quantity-input {
    display: flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    width: fit-content;
}

.quantity-input .btn-qty {
    width: 34px;
    height: 34px;
    border: none;
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: background var(--transition-fast);
}

.quantity-input .btn-qty:hover {
    background: var(--border-color);
}

.quantity-input input {
    width: 50px;
    height: 34px;
    border: none;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    background: var(--card-bg);
    color: var(--text);
}

.quantity-input input:focus {
    outline: none;
}

/* Currency display */
.currency {
    font-weight: 600;
    white-space: nowrap;
}

.currency::before {
    content: attr(data-currency);
    font-size: 0.8em;
    margin-right: 2px;
    opacity: 0.7;
}

/* Search autocomplete */
.autocomplete-wrapper {
    position: relative;
}

.autocomplete-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-md);
    max-height: 250px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
}

.autocomplete-results.show {
    display: block;
}

.autocomplete-item {
    padding: 8px 14px;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.active {
    background: var(--bg);
}

.autocomplete-item .item-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Toggle switch */
.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    display: inline-block;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border-color);
    border-radius: 24px;
    transition: background var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: #fff;
    border-radius: 50%;
    transition: transform var(--transition-fast);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--secondary);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* Language selector */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: transparent;
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text);
    transition: border-color var(--transition-fast);
}

.lang-switcher:hover {
    border-color: var(--secondary);
}

.lang-switcher .current-lang {
    font-weight: 600;
    text-transform: uppercase;
}

/* Date picker overrides */
.flatpickr-calendar {
    border-radius: var(--border-radius) !important;
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-md) !important;
}

.flatpickr-day {
    border-radius: var(--border-radius-sm) !important;
    font-size: var(--font-size-sm) !important;
}

.flatpickr-day.selected {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
}

.flatpickr-day:hover {
    background: var(--bg) !important;
}

/* Select2 overrides */
.select2-container--default .select2-selection--single {
    height: 40px !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--border-radius) !important;
}

.select2-container--default .select2-selection--single .select2-selection__rendered {
    line-height: 38px !important;
    padding-left: 14px !important;
    color: var(--text) !important;
    font-size: var(--font-size-sm) !important;
}

.select2-container--default .select2-selection--single .select2-selection__arrow {
    height: 38px !important;
}

.select2-container--default.select2-container--focus .select2-selection--single,
.select2-container--default.select2-container--open .select2-selection--single {
    border-color: var(--secondary) !important;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.12) !important;
}

.select2-dropdown {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--border-radius) !important;
    box-shadow: var(--shadow-md) !important;
    background: var(--card-bg) !important;
}

.select2-search--dropdown .select2-search__field {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--border-radius-sm) !important;
    background: var(--card-bg) !important;
    color: var(--text) !important;
}

.select2-results__option {
    font-size: var(--font-size-sm) !important;
    padding: 8px 14px !important;
}

.select2-results__option--highlighted {
    background: var(--secondary) !important;
}

/* Tooltip */
.tooltip-custom {
    position: relative;
}

.tooltip-custom::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: #fff;
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    font-size: 0.7rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    pointer-events: none;
    z-index: 1000;
}

.tooltip-custom:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Print-only and screen-only helpers */
.print-only {
    display: none;
}

@media print {
    .print-only {
        display: block !important;
    }

    .no-print {
        display: none !important;
    }
}