/* style.css - استایل اصلی سایت */
/* Reset و Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* تم تاریک (پیش‌فرض) */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-card: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #10b981;
    --accent-color: #8b5cf6;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --danger-color: #ef4444;
    --success-color: #10b981;

    /* Typography */
    --font-family: 'Vazir', 'Segoe UI', Tahoma, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    --font-size-4xl: 64px;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50%;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* تم روشن */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal),
        color var(--transition-normal);
    min-height: 100vh;
    overflow-x: hidden;
    direction: rtl;
    text-align: right;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.8;
}

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

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

/* Header - فیکس شده */
.header {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1000;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    height: 70px;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    position: relative;
}

/* Logo */
.logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    position: absolute;
    right: 50%;
    transform: translateX(50%);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.logo-sub {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    display: none;
}

@media (min-width: 768px) {
    .logo-sub {
        display: block;
    }
    
    .logo {
        position: static;
        transform: none;
    }
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
}

@media (min-width: 768px) {
    .desktop-nav {
        display: block;
    }
}

.nav-list {
    display: flex;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    left: 0;
    height: 2px;
    background-color: var(--primary-color);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    font-size: 20px;
    order: 1;
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: block;
}

[data-theme="light"] .moon-icon {
    display: none;
}

/* Mobile Menu Button */
.menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
    order: 2;
}

.menu-icon {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    position: relative;
}

.menu-icon::before,
.menu-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.menu-icon::before {
    top: -6px;
    right: 0;
}

.menu-icon::after {
    bottom: -6px;
    right: 0;
}

.menu-btn.active .menu-icon {
    background-color: transparent;
}

.menu-btn.active .menu-icon::before {
    transform: rotate(45deg) translate(4px, 4px);
    background-color: var(--primary-color);
}

.menu-btn.active .menu-icon::after {
    transform: rotate(-45deg) translate(4px, -4px);
    background-color: var(--primary-color);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

@media (min-width: 768px) {
    .header-actions {
        position: static;
        transform: none;
    }
    
    .menu-btn {
        display: none;
    }
}

@media (max-width: 767px) {
    .menu-btn {
        display: flex;
    }
    
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }
    
    .menu-btn {
        width: 36px;
        height: 36px;
    }
    
    .menu-icon {
        width: 20px;
    }
    
    .menu-icon::before,
    .menu-icon::after {
        width: 20px;
    }
    
    .header {
        height: 60px;
    }
    
    .header-content {
        height: 60px;
    }
    
    .logo-text {
        font-size: 20px;
    }
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 70px;
    right: 0;
    left: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 999;
    padding: var(--spacing-lg);
    display: none;
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
    display: block;
}

.mobile-nav-list {
    list-style: none;
    margin-top: var(--spacing-xl);
}

.mobile-nav-list li {
    margin-bottom: var(--spacing-sm);
}

.mobile-nav-list .nav-link {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
}

.mobile-nav-list .nav-link:hover,
.mobile-nav-list .nav-link.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

@media (max-width: 767px) {
    .mobile-menu {
        top: 60px;
    }
}

/* Mobile Contact Section */
.mobile-contact-section {
    margin-top: auto;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-card);
}

.mobile-contact-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mobile-contact-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
}

.mobile-contact-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.mobile-contact-link i {
    font-size: 20px;
}

.contact-text {
    flex: 1;
}

.contact-title {
    font-weight: 600;
    font-size: 14px;
}

.contact-subtitle {
    font-size: 12px;
    opacity: 0.8;
}

/* Main Content */
.main-content {
    padding-top: 70px;
    min-height: calc(100vh - 200px);
}

@media (max-width: 767px) {
    .main-content {
        padding-top: 60px;
    }
}

/* Sections */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

/* Hero Section */
.hero-section {
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
}

.highlight {
    color: var(--primary-color);
}

.hero-description {
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.card-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
}

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

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

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

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

.grid-5 {
    grid-template-columns: repeat(5, 1fr);
}

@media (max-width: 1024px) {
    .grid-3,
    .grid-4,
    .grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4,
    .grid-5 {
        grid-template-columns: 1fr;
    }
}

/* Service Icon */
.service-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    font-size: 24px;
}

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.portfolio-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.portfolio-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

/* Form */
.form-group {
    margin-bottom: var(--spacing-xl);
}

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

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Blog Styles */
.blog-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

@media (min-width: 992px) {
    .blog-container {
        grid-template-columns: 2fr 1fr;
    }
}

.blog-posts {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.blog-post {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.blog-post:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.post-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-post:hover .post-image img {
    transform: scale(1.05);
}

.post-content {
    padding: 25px;
}

.post-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 14px;
    color: var(--text-muted);
}

.post-category {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 500;
}

.post-title {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.post-title a {
    color: inherit;
    text-decoration: none;
}

.post-title a:hover {
    color: var(--primary-color);
}

.post-excerpt {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.read-time {
    color: var(--text-muted);
    font-size: 14px;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.read-more:hover {
    text-decoration: underline;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.sidebar-widget {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 25px;
    border: 1px solid var(--border-color);
}

.widget-title {
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.categories-list li {
    margin-bottom: 12px;
}

.category-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.category-link:hover {
    background: var(--primary-color);
    color: white;
}

.category-count {
    background: var(--bg-primary);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
}

.category-link:hover .category-count {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Popular Posts */
.popular-posts {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.popular-post {
    display: flex;
    gap: 15px;
    align-items: center;
}

.popular-image {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
}

.popular-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.popular-content h4 {
    margin-bottom: 5px;
    font-size: 14px;
}

.popular-content h4 a {
    color: var(--text-primary);
    text-decoration: none;
}

.popular-content h4 a:hover {
    color: var(--primary-color);
}

.popular-meta {
    font-size: 12px;
    color: var(--text-muted);
}

/* Newsletter Form */
.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.newsletter-form input {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.privacy-note {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 10px;
}

.privacy-note a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Tags Cloud */
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 6px 12px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 12px;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--primary-color);
    color: white;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
}

.page-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.page-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-numbers {
    display: flex;
    gap: 5px;
}

.page-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.page-number:hover,
.page-number.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Blog Search */
.blog-search {
    max-width: 500px;
    margin: 0 auto 40px;
}

.search-form {
    position: relative;
}

.search-form input {
    width: 100%;
    padding: 12px 50px 12px 20px;
    font-size: 16px;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.search-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-form button {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
}

/* Featured Post */
.featured-post {
    grid-column: 1 / -1;
}

.featured-post .post-image {
    height: 350px;
}

.featured-post .post-title {
    font-size: 26px;
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

/* FAQ */
.faq-item {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

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

.faq-item h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-2xl) 0;
    margin-top: var(--spacing-3xl);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-section h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-links {
    list-style: none;
}

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

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

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background-color: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    text-decoration: none;
    font-size: 18px;
}

.social-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.copyright {
    text-align: center;
    padding-top: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

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

.mt-1 {
    margin-top: var(--spacing-xs);
}

.mt-2 {
    margin-top: var(--spacing-sm);
}

.mt-3 {
    margin-top: var(--spacing-md);
}

.mt-4 {
    margin-top: var(--spacing-lg);
}

.mt-5 {
    margin-top: var(--spacing-xl);
}

.mb-1 {
    margin-bottom: var(--spacing-xs);
}

.mb-2 {
    margin-bottom: var(--spacing-sm);
}

.mb-3 {
    margin-bottom: var(--spacing-md);
}

.mb-4 {
    margin-bottom: var(--spacing-lg);
}

.mb-5 {
    margin-bottom: var(--spacing-xl);
}

.p-1 {
    padding: var(--spacing-xs);
}

.p-2 {
    padding: var(--spacing-sm);
}

.p-3 {
    padding: var(--spacing-md);
}

.p-4 {
    padding: var(--spacing-lg);
}

.p-5 {
    padding: var(--spacing-xl);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

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

/* Error */
.error-message {
    color: var(--danger-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: none;
}

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

.form-control.error+.error-message {
    display: block;
}

/* Success */
.success-message {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: none;
}

.success-message.show {
    display: block;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 30px;
    position: relative;
}

.modal-close {
    position: absolute;
    left: 20px;
    top: 20px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
}

/* Responsive */
@media (max-width: 640px) {
    :root {
        --font-size-3xl: 36px;
        --font-size-2xl: 28px;
        --font-size-xl: 20px;
        --font-size-lg: 18px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .post-meta {
        flex-wrap: wrap;
    }
    
    .post-footer {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .popular-post {
        flex-direction: column;
        text-align: center;
    }
    
    .popular-image {
        width: 100%;
        height: 150px;
    }
}