/**
 * Islamic Finance Database - Main Application Stylesheet
 * 
 * @package     IslamicFinanceDB
 * @author      Islamic Finance Database Team
 * @copyright   2024-2026 Islamic Finance Database
 * @version     1.0.0
 * 
 * Table of Contents:
 * 
 * 1. Variables & Configuration
 * 2. Base Styles & Typography
 * 3. Layout Components
 * 4. Navigation & Header
 * 5. Hero Sections
 * 6. Cards & Containers
 * 7. Forms & Inputs
 * 8. Buttons
 * 9. Tables
 * 10. Pagination
 * 11. Modals & Dialogs
 * 12. Alerts & Notifications
 * 13. Footer
 * 14. Utilities
 * 15. RTL Support
 * 16. Responsive Design
 * 17. Print Styles
 */

/* ==========================================================================
   1. Variables & Configuration
   ========================================================================== */

:root {
    /* Brand Colors */
    --color-primary: #1c5c6c;
    --color-primary-light: #2a7a8c;
    --color-primary-dark: #164a57;
    --color-primary-darker: #0d3a45;
    
    --color-secondary: #C9A84C;
    --color-secondary-light: #d4b85c;
    --color-secondary-dark: #b8973c;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Semantic Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Typography */
    --font-family-primary: 'Tajawal', 'Segoe UI', Tahoma, sans-serif;
    --font-family-secondary: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --spacing-0: 0;
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* ==========================================================================
   2. Base Styles & Typography
   ========================================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-gray-900);
    background-color: var(--color-white);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: var(--spacing-4);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-top: 0;
    margin-bottom: var(--spacing-4);
}

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

a:hover {
    color: var(--color-primary-dark);
}

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

/* ==========================================================================
   3. Layout Components
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
}

.container-fluid {
    width: 100%;
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin-left: calc(var(--spacing-4) * -1);
    margin-right: calc(var(--spacing-4) * -1);
}

.col {
    flex: 1 0 0%;
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
}

/* ==========================================================================
   4. Navigation & Header
   ========================================================================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
}

.navbar-brand img {
    height: 48px;
    width: auto;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background-color: rgba(28, 92, 108, 0.1);
}

/* ==========================================================================
   5. Hero Sections
   ========================================================================== */

.hero {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(28, 92, 108, 0.85) 0%, 
        rgba(28, 92, 108, 0.65) 60%, 
        rgba(201, 168, 76, 0.45) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    padding: var(--spacing-8);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-4);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   6. Cards & Containers
   ========================================================================== */

.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

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

.card-header {
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
    background-color: var(--color-gray-50);
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
    background-color: var(--color-gray-50);
}

/* Document Card */
.document-card {
    display: flex;
    gap: var(--spacing-5);
    padding: var(--spacing-5);
    border-right: 4px solid var(--color-primary);
    cursor: pointer;
}

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

.document-thumbnail {
    width: 128px;
    height: 176px;
    flex-shrink: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.document-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.document-card:hover .document-thumbnail img {
    transform: scale(1.05);
}

.document-info {
    flex: 1;
    min-width: 0;
}

.document-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
    line-height: var(--line-height-tight);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.document-card:hover .document-title {
    color: var(--color-primary);
}

.document-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-3);
}

.document-authors {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-3);
}

.document-abstract {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: var(--line-height-relaxed);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Category Card */
.category-card {
    position: relative;
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
    min-height: 140px;
    transition: all var(--transition-normal);
}

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

/* ==========================================================================
   7. Forms & Inputs
   ========================================================================== */

.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.form-label .required {
    color: var(--color-error);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-2) var(--spacing-4);
    font-family: inherit;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-gray-900);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(28, 92, 108, 0.15);
}

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

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--color-gray-100);
    cursor: not-allowed;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: left 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-left: 2.5rem;
}

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

.form-checkbox,
.form-radio {
    width: 1rem;
    height: 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.form-checkbox:checked,
.form-radio:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.form-error {
    font-size: var(--font-size-sm);
    color: var(--color-error);
    margin-top: var(--spacing-1);
}

.form-help {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-top: var(--spacing-1);
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-upload:hover,
.file-upload.drag-over {
    border-color: var(--color-primary);
    background-color: rgba(28, 92, 108, 0.05);
}

.file-upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-3);
    color: var(--color-gray-400);
}

.file-upload-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-1);
}

.file-upload-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

/* ==========================================================================
   8. Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

/* Secondary Button */
.btn-secondary {
    color: var(--color-primary);
    background-color: transparent;
    border-color: var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
    color: var(--color-white);
    background-color: var(--color-primary);
}

/* Gold/Accent Button */
.btn-accent {
    color: var(--color-white);
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn-accent:hover:not(:disabled) {
    background-color: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
}

/* Danger Button */
.btn-danger {
    color: var(--color-white);
    background-color: var(--color-error);
    border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
    border-color: #dc2626;
}

/* Ghost Button */
.btn-ghost {
    color: var(--color-gray-700);
    background-color: transparent;
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-gray-100);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
}

.btn-xl {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

/* ==========================================================================
   9. Tables
   ========================================================================== */

.table-container {
    width: 100%;
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: right;
}

.table th,
.table td {
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-200);
}

.table th {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background-color: var(--color-gray-50);
}

.table td {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
}

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

/* ==========================================================================
   10. Pagination
   ========================================================================== */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) 0;
}

.pagination-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination-item:hover:not(.disabled):not(.active) {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-400);
}

.pagination-item.active {
    color: var(--color-white);
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================================================
   11. Modals & Dialogs
   ========================================================================== */

.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal-backdrop);
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: var(--z-modal);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin: 0;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-400);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-gray-600);
    background-color: var(--color-gray-100);
}

.modal-body {
    padding: var(--spacing-6);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
    background-color: var(--color-gray-50);
}

/* ==========================================================================
   12. Alerts & Notifications
   ========================================================================== */

.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
}

.alert-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-1);
}

.alert-success {
    color: #065f46;
    background-color: #d1fae5;
    border: 1px solid #6ee7b7;
}

.alert-warning {
    color: #92400e;
    background-color: #fef3c7;
    border: 1px solid #fcd34d;
}

.alert-error {
    color: #991b1b;
    background-color: #fee2e2;
    border: 1px solid #fca5a5;
}

.alert-info {
    color: #1e40af;
    background-color: #dbeafe;
    border: 1px solid #93c5fd;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-4);
    left: var(--spacing-4);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.toast {
    min-width: 300px;
    padding: var(--spacing-4);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease-out;
}

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

/* ==========================================================================
   13. Footer
   ========================================================================== */

.footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-logo {
    margin-bottom: var(--spacing-6);
}

.footer-logo img {
    height: 60px;
    width: auto;
}

.footer-description {
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-gray-400);
    max-width: 300px;
}

.footer-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-4);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-2);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    margin-top: var(--spacing-12);
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ==========================================================================
   14. Utilities
   ========================================================================== */

/* Text Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-muted { color: var(--color-gray-500); }
.text-white { color: var(--color-white); }

.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Background Utilities */
.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-white { background-color: var(--color-white); }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }

/* Spacing Utilities */
.m-0 { margin: 0; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.p-0 { padding: 0; }

/* Display Utilities */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }
.d-grid { display: grid; }

.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.flex-column { flex-direction: column; }

.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-items-end { align-items: flex-end; }

.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-end { justify-content: flex-end; }

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

/* Border Utilities */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Transition Utilities */
.transition { transition: all var(--transition-normal); }
.transition-fast { transition: all var(--transition-fast); }

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

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   15. RTL Support
   ========================================================================== */

[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .form-select {
    background-position: right 0.5rem center;
    padding-right: 2.5rem;
    padding-left: var(--spacing-4);
}

[dir="rtl"] .modal-close {
    margin-left: 0;
    margin-right: auto;
}

/* ==========================================================================
   16. Responsive Design
   ========================================================================== */

@media (max-width: 1279px) {
    .container {
        max-width: 1024px;
    }
}

@media (max-width: 1023px) {
    .container {
        max-width: 768px;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
}

@media (max-width: 767px) {
    :root {
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
    }
    
    .container {
        padding-left: var(--spacing-4);
        padding-right: var(--spacing-4);
    }
    
    .hero {
        min-height: 300px;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .document-card {
        flex-direction: column;
    }
    
    .document-thumbnail {
        width: 100%;
        height: 200px;
    }
    
    .modal {
        max-width: calc(100% - var(--spacing-8));
        margin: var(--spacing-4);
    }
}

/* ==========================================================================
   17. Print Styles
   ========================================================================== */

@media print {
    *,
    *::before,
    *::after {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    a,
    a:visited {
        text-decoration: underline;
    }
    
    .navbar,
    .footer,
    .btn,
    .pagination {
        display: none !important;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
}