/* متغیرهای CSS برای تم روشن - نسخه مدرن */
:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --primary-dark: #3a56d4;
    --secondary-color: #7209b7;
    --secondary-light: #9d4edd;
    --accent-color: #f72585;
    --accent-light: #ff4da6;
    --success-color: #4cc9f0;
    --warning-color: #f8961e;
    --error-color: #f94144;
    
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, var(--accent-color), var(--warning-color));
    --gradient-surface: linear-gradient(135deg, #ffffff, #f8f9fa);
    
    --background-color: #ffffff;
    --surface-color: #f8f9fa;
    --card-color: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #8d8d8d;
    --border-color: #e0e0e0;
    --divider-color: #f0f0f0;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.16);
    
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    --header-height: 70px;
    --nav-height: 80px;
    --border-radius: 16px;
    --border-radius-sm: 12px;
    --border-radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

/* متغیرهای CSS برای تم تاریک - نسخه مدرن */
[data-theme="dark"] {
    --gradient-surface: linear-gradient(135deg, #1e1e1e, #252525);
    
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --card-color: #252525;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #6d6d6d;
    --border-color: #333333;
    --divider-color: #2a2a2a;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.6);
    
    --glass-bg: rgba(30, 30, 30, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* ریست استایل ها و فونت */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gradient-surface);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    padding-bottom: var(--nav-height);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* هدر اصلی - نسخه مدرن */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

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

.site-title {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
    letter-spacing: -0.5px;
}

.site-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* دکمه جستجو */
.search-toggle {
    background: var(--card-color);
    border: 1px solid var(--border-color);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

.search-toggle:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* دکمه تغییر تم - نسخه مدرن */
.theme-toggle {
    position: relative;
    width: 52px;
    height: 28px;
    border-radius: 14px;
    background: var(--card-color);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 0 3px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.theme-toggle:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.theme-slider {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--gradient-primary);
    position: absolute;
    left: 3px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.7rem;
}

.theme-slider::before {
    content: '☀️';
}

[data-theme="dark"] .theme-slider::before {
    content: '🌙';
}

[data-theme="dark"] .theme-slider {
    transform: translateX(24px);
}

/* محتوای اصلی */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

/* بخش فیلتر وبلاگ */
.blog-filter-section {
    margin-bottom: 2rem;
}

.filter-container {
    background: var(--card-color);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.filter-tabs {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.filter-tabs::-webkit-scrollbar {
    display: none;
}

.filter-tab {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.25rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
}

.filter-tab:hover {
    background: var(--card-color);
    color: var(--primary-color);
    border-color: var(--primary-light);
}

.filter-tab.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
}

/* بخش اصلی وبلاگ ها */
.blogs-main-section {
    margin-bottom: 2.5rem;
}

.blogs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.blog-card-vertical {
    background: var(--card-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.blog-card-vertical:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.blog-image-vertical {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.blog-card-vertical:hover .blog-image-vertical {
    transform: scale(1.05);
}

.blog-content-vertical {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-title-vertical {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-excerpt {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.blog-meta-vertical {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.blog-author-vertical {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.blog-avatar-vertical {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.blog-username-vertical {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.blog-date-vertical {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.read-more-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    margin-top: 1rem;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}

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

/* منوی ناوبری پایین - نسخه فوق مدرن */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: var(--nav-height);
    z-index: 1000;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.1);
    padding: 0 1rem;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
    color: var(--text-secondary);
    padding: 0.75rem 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    flex: 1;
    max-width: 70px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: -8px;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: var(--transition);
    opacity: 0;
}

.nav-item:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-item:hover::before {
    width: 24px;
    opacity: 1;
}

.nav-item.active {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-item.active::before {
    width: 24px;
    opacity: 1;
}

.nav-item.active .nav-icon {
    transform: scale(1.1);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-icon {
    font-size: 1.4rem;
    transition: var(--transition);
    position: relative;
    z-index: 2;
}

.nav-item span {
    font-size: 0.75rem;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    z-index: 2;
}

/* دکمه چت بات ویژه - نسخه مدرن */
.nav-item.chat-button {
    position: relative;
    background: var(--gradient-primary);
    color: white !important;
    border-radius: 50%;
    width: 70px;
    height: 70px;
    margin-top: -25px;
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    transition: var(--transition);
    border: 3px solid var(--background-color);
    z-index: 10;
}

.nav-item.chat-button::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    background: var(--gradient-primary);
    border-radius: 50%;
    z-index: -1;
    opacity: 0.3;
    animation: pulse 2s infinite;
}

.nav-item.chat-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 35px rgba(67, 97, 238, 0.6);
}

.nav-item.chat-button.active {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 35px rgba(67, 97, 238, 0.6);
}

.nav-item.chat-button .nav-icon {
    font-size: 1.6rem;
    color: white !important;
    -webkit-text-fill-color: white !important;
    background: none !important;
}

.nav-item.chat-button span {
    font-size: 0.7rem;
    font-weight: 700;
    opacity: 0.9;
    color: white !important;
    position: absolute;
    bottom: -20px;
    background: var(--primary-color);
    padding: 3px 10px;
    border-radius: 12px;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* مودال وبلاگ - نسخه مدرن */
.blog-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    backdrop-filter: blur(10px);
}

.blog-modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.blog-modal-content {
    position: relative;
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    background: var(--background-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
}

.blog-close {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: none;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
}

.blog-close:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

.blog-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 2.5rem;
    height: 100%;
}

.blog-modal-image {
    width: 100%;
    max-height: 320px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
}

.blog-modal-title {
    font-size: 1.875rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.blog-modal-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.blog-modal-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.blog-modal-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.blog-modal-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.blog-modal-user-info {
    display: flex;
    flex-direction: column;
}

.blog-modal-username {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1rem;
}

.blog-modal-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* مودال جستجو */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    backdrop-filter: blur(10px);
}

.search-modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.search-modal-content {
    position: relative;
    width: 100%;
    max-width: 600px;
    background: var(--background-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    max-height: 80vh;
}

.search-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.search-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.search-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-close:hover {
    background: var(--surface-color);
    color: var(--text-primary);
}

.search-input-container {
    position: relative;
    padding: 1.5rem 2rem;
}

.search-icon {
    position: absolute;
    right: 2.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
}

#searchInput {
    width: 100%;
    padding: 1rem 3rem 1rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--surface-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.search-clear {
    position: absolute;
    left: 2.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
}

.search-clear.active {
    opacity: 1;
    visibility: visible;
}

.search-clear:hover {
    background: var(--surface-color);
    color: var(--text-primary);
}

.search-results {
    flex: 1;
    overflow-y: auto;
    max-height: 400px;
    padding: 0 2rem 1.5rem;
}

.search-result-item {
    padding: 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.search-result-item:hover {
    background: var(--surface-color);
    border-color: var(--border-color);
}

.search-result-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.search-result-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.no-results {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

/* استایل‌های وضعیت‌های مختلف */
.loading-blogs,
.no-blogs,
.error-blogs {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem 2rem;
    color: var(--text-secondary);
    text-align: center;
    width: 100%;
    grid-column: 1 / -1;
}

.loading-blogs i,
.no-blogs i,
.error-blogs i {
    font-size: 3rem;
    opacity: 0.5;
    margin-bottom: 1rem;
}

.retry-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

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

/* انیمیشن ها */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: scale(0.95);
    }
    to { 
        opacity: 1; 
        transform: scale(1);
    }
}

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

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.2;
    }
    100% {
        transform: scale(1);
        opacity: 0.3;
    }
}

/* بهبود نمایش در حالت تاریک */
[data-theme="dark"] .blog-card-vertical:hover {
    border-color: var(--primary-light);
}

[data-theme="dark"] .nav-item.chat-button {
    border-color: var(--background-color);
}

[data-theme="dark"] .nav-item.chat-button::before {
    opacity: 0.2;
}

/* ریسپانسیو */
@media (max-width: 768px) {
    .main-header {
        height: 65px;
        padding: 0 1rem;
    }
    
    .site-title {
        font-size: 1.3rem;
    }
    
    .site-subtitle {
        font-size: 0.75rem;
    }
    
    .main-content {
        padding: 1rem 0.75rem;
    }
    
    .blogs-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .filter-tabs {
        gap: 0.5rem;
    }
    
    .filter-tab {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }
    
    .blog-modal-body {
        padding: 1.5rem;
    }
    
    .blog-modal-title {
        font-size: 1.5rem;
    }
    
    .bottom-nav {
        padding: 0 0.5rem;
        height: 75px;
    }
    
    .nav-item {
        padding: 0.6rem 0.3rem;
        max-width: 60px;
        gap: 0.3rem;
    }
    
    .nav-icon {
        font-size: 1.3rem;
    }
    
    .nav-item span {
        font-size: 0.7rem;
    }
    
    .nav-item.chat-button {
        width: 65px;
        height: 65px;
        margin-top: -22px;
    }
    
    .nav-item.chat-button .nav-icon {
        font-size: 1.5rem;
    }
    
    .nav-item.chat-button span {
        font-size: 0.65rem;
        bottom: -18px;
    }
}

@media (max-width: 480px) {
    .blog-card-vertical {
        min-width: auto;
    }
    
    .blog-image-vertical {
        height: 160px;
    }
    
    .blog-content-vertical {
        padding: 1.25rem;
    }
    
    .blog-title-vertical {
        font-size: 1.1rem;
    }
    
    .nav-item {
        max-width: 55px;
        padding: 0.5rem 0.2rem;
    }
    
    .nav-icon {
        font-size: 1.2rem;
    }
    
    .nav-item span {
        font-size: 0.65rem;
    }
    
    .nav-item.chat-button {
        width: 60px;
        height: 60px;
        margin-top: -20px;
    }
    
    .nav-item.chat-button .nav-icon {
        font-size: 1.4rem;
    }
    
    .search-modal-content {
        margin: 0.5rem;
    }
    
    .search-header,
    .search-input-container {
        padding: 1rem 1.5rem;
    }
    
    .search-results {
        padding: 0 1.5rem 1rem;
    }
}