/* ============================================
   ALKHUFASH ONLINE - Stylesheet
   Design: Modern Fintech Minimalism
   Color Scheme: Dark mode (default)
   ============================================ */

/* ===== CSS Variables (Theme) ===== */
:root {
    /* Colors - Dark Mode */
    --bg-primary: #0b0f1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1a202c;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-hover: #2563eb;
    --border-color: #1f2937;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    
    /* Typography */
    --font-display: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Light Mode */
body.light-mode {
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
}

/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 3rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

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

a:hover {
    color: var(--accent-hover);
}

/* ===== Header Navigation ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    background-color: rgba(17, 24, 39, 0.8);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo {
    flex-shrink: 0;
    cursor: pointer;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    flex: 1;
    justify-content: flex-end;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.header-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-lang,
.btn-theme {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.btn-lang:hover,
.btn-theme:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* ===== Buttons ===== */
.btn-primary,
.btn-secondary,
.btn-back {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 0.5rem;
    font-family: var(--font-body);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.btn-back {
    background: none;
    color: var(--accent-blue);
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
}

.btn-back:hover {
    color: var(--accent-hover);
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: right;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at 100% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 600px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

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

/* ===== Sections ===== */
.section {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

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

.section-header h2 {
    margin: 0;
}

.link-more {
    color: var(--accent-blue);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.link-more:hover {
    gap: var(--spacing-sm);
}

/* ===== Grid Layouts ===== */
.articles-grid,
.categories-grid,
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* ===== Article Card ===== */
.article-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-blue);
}

.article-card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    font-weight: 700;
}

.article-card-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-category {
    display: inline-block;
    background-color: var(--bg-tertiary);
    color: var(--accent-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    width: fit-content;
}

.article-card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.article-card-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.article-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-sm);
}

/* ===== Category Card ===== */
.category-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.category-card:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.category-card h3 {
    margin-bottom: var(--spacing-sm);
}

.category-card p {
    font-size: 0.95rem;
    margin: 0;
}

/* ===== Pages ===== */
.page {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.page.active {
    display: block;
}

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

.page-header {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
    text-align: right;
}

.page-header h1 {
    margin-bottom: var(--spacing-md);
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ===== Articles Page ===== */
.articles-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-lg);
}

.filters-sidebar {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.filter-group {
    margin-bottom: var(--spacing-lg);
}

.filter-group:last-child {
    margin-bottom: 0;
}

.filter-group h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.filter-item {
    margin-bottom: var(--spacing-sm);
}

.filter-item label {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.filter-item label:hover {
    color: var(--accent-blue);
}

.filter-item input[type="radio"] {
    margin-right: var(--spacing-sm);
    cursor: pointer;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.article-list-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.article-list-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-blue);
    transform: translateX(-4px);
}

.article-list-item h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.article-list-item p {
    margin-bottom: var(--spacing-md);
}

.article-list-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.pagination button {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination button:hover,
.pagination button.active {
    background-color: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

/* ===== Article Detail Page ===== */
.article-container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.article-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-2xl);
}

.article-content h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.article-content h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.article-content h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.article-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.article-content ul,
.article-content ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.article-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* ===== Tools Page ===== */
.tools-grid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
}

.tool-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
}

.tool-card h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.calculator {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.calc-input {
    display: flex;
    flex-direction: column;
}

.calc-input label {
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-secondary);
}

.calc-input input {
    padding: var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.calc-input input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.calc-result {
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border-left: 4px solid var(--accent-green);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
    min-height: 50px;
    display: flex;
    align-items: center;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
}

.link-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    display: block;
}

.link-card:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.link-card h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.link-card p {
    margin: 0;
    font-size: 0.95rem;
}

/* ===== About Page ===== */
.about-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
}

.about-section {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.about-section h2 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-blue);
}

.about-section p {
    margin: 0;
}

/* ===== Contact Page ===== */
.contact-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
}

.contact-info {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.contact-info h2 {
    margin-bottom: var(--spacing-md);
}

.email-link {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-blue);
}

.contact-form {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: var(--spacing-lg);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer-section p {
    margin-bottom: var(--spacing-sm);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    background-color: var(--accent-green);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 2000;
    animation: slideInUp 0.3s ease-out;
}

.toast.show {
    display: block;
}

.toast.error {
    background-color: #ef4444;
}

@keyframes slideInUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .header-container {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .nav-menu {
        order: 3;
        width: 100%;
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
        min-height: 400px;
        text-align: center;
        justify-content: center;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .articles-grid,
    .categories-grid,
    .tools-grid {
        grid-template-columns: 1fr;
    }

    .articles-container {
        grid-template-columns: 1fr;
    }

    .filters-sidebar {
        position: static;
    }

    .section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .article-content {
        padding: var(--spacing-lg);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .header-container {
        padding: var(--spacing-md);
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .nav-menu {
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: 0.9rem;
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-md);
        min-height: 300px;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .article-content {
        padding: var(--spacing-md);
    }

    .toast {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
}

/* ===== RTL Support ===== */
[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .hero {
    justify-content: flex-start;
}

[dir="rtl"] .article-card-meta,
[dir="rtl"] .article-list-meta {
    flex-direction: row-reverse;
}

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

[dir="rtl"] .filter-item label {
    flex-direction: row-reverse;
}

[dir="rtl"] .filter-item input[type="radio"] {
    margin-right: 0;
    margin-left: var(--spacing-sm);
}