/* ===================================
   Aziz School - Apple Inspired Design
   تصميم مستوحى من Apple
   =================================== */

/* ===== المتغيرات - Apple Style ===== */
:root {
    /* الألوان الأساسية - Apple Colors */
    --primary: #007AFF;
    --primary-dark: #0051D5;
    --primary-light: #E5F1FF;
    
    --success: #34C759;
    --warning: #FF9500;
    --danger: #FF3B30;
    --info: #5AC8FA;
    
    /* الألوان الرمادية - Apple Grays */
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F7;
    --gray-200: #E5E5EA;
    --gray-300: #D1D1D6;
    --gray-400: #C7C7CC;
    --gray-500: #AEAEB2;
    --gray-600: #8E8E93;
    --gray-700: #636366;
    --gray-800: #48484A;
    --gray-900: #1C1C1E;
    
    /* النصوص - Apple Text Colors */
    --text-dark: #1D1D1F;
    --text-light: #6E6E73;
    --text-muted: #86868B;
    
    /* الخلفيات */
    --bg-white: #FFFFFF;
    --bg-light: #FBFBFD;
    --bg-dark: #000000;
    
    /* الظلال - Apple Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.10);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
    
    /* المسافات */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* الحدود - Apple Radius */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --radius-full: 9999px;
    
    /* الانتقالات - Apple Transitions */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== إعادة تعيين الأساسيات ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
    line-height: 1.47059;
    color: var(--text-dark);
    background-color: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.003em;
}

body[dir="rtl"] {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Arabic', 'Cairo', system-ui, sans-serif;
}

/* تحسين النصوص للشاشات عالية الدقة */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    body {
        -webkit-font-smoothing: subpixel-antialiased;
    }
}

/* ===== التخطيط العام ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-sm {
    max-width: 800px;
}

.container-lg {
    max-width: 1400px;
}

/* ===== الهيدر - Apple Style ===== */
header {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    min-height: 44px;
}

.logo {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-dark);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    letter-spacing: -0.02em;
    transition: var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo i {
    color: var(--primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.25rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.9375rem;
    transition: var(--transition-fast);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius);
    letter-spacing: -0.01em;
}

.nav-menu a:hover {
    color: var(--primary);
    background: var(--gray-100);
}

.nav-menu a:active {
    transform: scale(0.97);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.balance-badge {
    background: var(--gray-100);
    color: var(--text-dark);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.8125rem;
    letter-spacing: -0.01em;
    border: 0.5px solid var(--gray-200);
}

.notifications-icon {
    position: relative;
    color: var(--text-dark);
    font-size: 1.125rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.notifications-icon:hover {
    background: var(--gray-100);
}

.notifications-icon:active {
    transform: scale(0.95);
}

.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background: var(--danger);
    color: white;
    font-size: 0.625rem;
    min-width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-weight: 600;
    border: 1.5px solid white;
}

/* ===== الأزرار - Apple Style ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.625rem 1.25rem;
    font-size: 1.0625rem;
    font-weight: 400;
    text-decoration: none;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
}

.btn:active {
    transform: scale(0.98);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity 0.2s;
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--text-dark);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-success {
    background: var(--success);
    color: white;
    box-shadow: 0 2px 8px rgba(52, 199, 89, 0.2);
}

.btn-success:hover {
    background: #2FB350;
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.3);
}

.btn-danger {
    background: var(--danger);
    color: white;
    box-shadow: 0 2px 8px rgba(255, 59, 48, 0.2);
}

.btn-danger:hover {
    background: #E62E24;
    box-shadow: 0 4px 12px rgba(255, 59, 48, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9375rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.0625rem;
    font-weight: 500;
}

.btn-xl {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: 500;
}

/* ===== البطاقات - Apple Style ===== */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 0.5px solid rgba(0, 0, 0, 0.04);
    position: relative;
}

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

.card:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

.card-header {
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: 0.5px solid var(--gray-200);
}

.card-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: -0.02em;
}

.card-subtitle {
    font-size: 0.9375rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
    letter-spacing: -0.01em;
}

/* ===== النماذج - Apple Style ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1.0625rem;
    transition: var(--transition-fast);
    background: var(--bg-white);
    font-family: inherit;
    letter-spacing: -0.01em;
}

.form-control:hover {
    border-color: var(--gray-400);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
    background: var(--bg-white);
}

.form-control::placeholder {
    color: var(--gray-500);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
    line-height: 1.47059;
}

select.form-control {
    cursor: pointer;
    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='%23999' d='M10.293 3.293L6 7.586 1.707 3.293A1 1 0 00.293 4.707l5 5a1 1 0 001.414 0l5-5a1 1 0 10-1.414-1.414z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: left 1rem center;
    padding-left: 2.5rem;
}

select.form-control[dir="rtl"] {
    background-position: right 1rem center;
    padding-right: 2.5rem;
    padding-left: 1rem;
}

/* ===== الجداول ===== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
}

table thead {
    background: var(--gray-100);
}

table th {
    padding: var(--spacing-md);
    text-align: right;
    font-weight: 600;
    color: var(--text-dark);
    border-bottom: 2px solid var(--gray-200);
}

table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

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

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

/* ===== الشارات ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary {
    background: var(--primary-light);
    color: var(--primary);
}

.badge-success {
    background: #E8F5E9;
    color: var(--success);
}

.badge-warning {
    background: #FFF3E0;
    color: var(--warning);
}

.badge-danger {
    background: #FFEBEE;
    color: var(--danger);
}

.badge-info {
    background: #E3F2FD;
    color: var(--info);
}

/* ===== التنبيهات ===== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert-success {
    background: #E8F5E9;
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-warning {
    background: #FFF3E0;
    color: var(--warning);
    border-left: 4px solid var(--warning);
}

.alert-danger {
    background: #FFEBEE;
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.alert-info {
    background: #E3F2FD;
    color: var(--info);
    border-left: 4px solid var(--info);
}

/* ===== Grid النظام ===== */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ===== المساعدات ===== */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

.d-flex {
    display: flex;
}

.align-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

/* ===== Footer - Apple Style ===== */
footer {
    background: var(--text-dark);
    color: var(--gray-400);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-3xl);
    border-top: 0.5px solid var(--gray-700);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
    color: var(--bg-white);
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.625rem;
}

.footer-section a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
}

.footer-section a:hover {
    color: var(--bg-white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 0.5px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-500);
}

/* ===== Responsive - Mobile First ===== */
@media (max-width: 1024px) {
    html {
        font-size: 15px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .header-content {
        padding: 0.625rem 0;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
        border-top: 0.5px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu a {
        width: 100%;
        padding: 0.875rem 1rem;
        margin-bottom: 0.25rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .user-menu {
        gap: var(--spacing-sm);
    }
    
    .balance-badge {
        font-size: 0.75rem;
        padding: 0.3125rem 0.75rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .card {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .card {
        padding: var(--spacing-md);
        border-radius: var(--radius);
    }
    
    .btn {
        font-size: 1rem;
        padding: 0.5625rem 1.125rem;
    }
    
    .btn-lg {
        padding: 0.6875rem 1.375rem;
    }
}

/* تحسينات للشاشات الكبيرة */
@media (min-width: 1440px) {
    html {
        font-size: 17px;
    }
    
    .container {
        max-width: 1280px;
    }
}

/* ===== Loading Spinner ===== */
.spinner {
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== Modal - Apple Style ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: -0.02em;
    margin: 0;
}

.modal-close {
    background: var(--gray-100);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-200);
    transform: scale(1.05);
}

.modal-close:active {
    transform: scale(0.95);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.empty-state-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

/* ===== Hero Section - Apple Style ===== */
.hero-section {
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--gray-50) 100%);
    padding: var(--spacing-3xl) var(--spacing-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.03em;
    line-height: 1.05;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--text-light);
    margin-bottom: var(--spacing-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Teacher Card - Enhanced ===== */
.teacher-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 0.5px solid rgba(0, 0, 0, 0.04);
    text-align: center;
}

.teacher-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.teacher-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    object-fit: cover;
    border: 3px solid var(--gray-100);
}

.teacher-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.375rem;
    letter-spacing: -0.02em;
}

.teacher-country {
    color: var(--text-light);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-md);
}

.teacher-price {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

/* ===== Features Section ===== */
.feature-card {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-lg);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.08));
}

.feature-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.feature-description {
    color: var(--text-light);
    font-size: 1.0625rem;
    line-height: 1.5;
    letter-spacing: -0.01em;
}

/* ===== Section Titles ===== */
.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    letter-spacing: -0.03em;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.01em;
}

/* ===== Glassmorphism Effect ===== */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 0.5px solid rgba(255, 255, 255, 0.3);
}

/* ===== Smooth Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Loading States ===== */
.skeleton {
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius);
}

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

/* ===== Improved Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* ===== Focus Visible ===== */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ===== Selection ===== */
::selection {
    background: var(--primary);
    color: white;
}

::-moz-selection {
    background: var(--primary);
    color: white;
}