/* ============================================
           HOMEPAGE STYLES - مدیریت هوشمند
           ============================================ */
        
        /* Vazir - فونت اصلی */
        @font-face {
            font-family: 'Vazir';
            src: url('../fonts/Vazir.woff2') format('woff2'),
                 url('../fonts/Vazir.woff') format('woff'),
                 url('../fonts/Vazir.ttf') format('truetype');
            font-weight: 400;
            font-style: normal;
            font-display: swap;
        }
        
        /* CSS VARIABLES & RESET */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #10b981;
            --dark: #0f172a;
            --gray: #64748b;
            --light: #f8fafc;
            --white: #ffffff;
            --gradient-primary: linear-gradient(135deg, #2563eb, #1d4ed8);
            --gradient-secondary: linear-gradient(135deg, #f59e0b, #d97706);
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
            --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        
        body {
            font-family: 'Vazir', system-ui, sans-serif;
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            direction: rtl;
            overflow-x: hidden;
        }
        
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #e2e8f0;
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }
        
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        
        /* TOP BAR */
        .top-bar {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: white;
            padding: 0.75rem 0;
            font-size: 0.8125rem;
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .top-bar-info {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .top-bar-info a {
            color: white;
            text-decoration: none;
        }
        .top-bar-info a:hover { color: var(--secondary); }
        .top-bar-btn {
            background: rgba(255,255,255,0.15);
            padding: 0.5rem 1.25rem;
            border-radius: 9999px;
            text-decoration: none;
            color: white;
        }
        
        /* HEADER */
        .main-header {
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(20px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: all 0.3s;
        }
        .main-header.scrolled {
            padding: 0.25rem 0;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
        }
        .logo-icon {
            width: 48px;
            height: 48px;
            background: var(--gradient-primary);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
        }
        .logo-text h1 {
            font-size: 1.125rem;
            font-weight: 800;
            color: var(--dark);
        }
        .logo-text p {
            font-size: 0.7rem;
            color: var(--gray);
        }
        .desktop-nav {
            display: none;
            gap: 2rem;
        }
        @media (min-width: 1024px) { .desktop-nav { display: flex; } }
        .nav-link {
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            right: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(to left, var(--primary), var(--secondary));
            transition: width 0.3s;
        }
        .nav-link:hover::after { width: 100%; }
        .has-dropdown { position: relative; }
        .dropdown {
            position: absolute;
            top: 100%;
            right: 0;
            background: white;
            border-radius: 12px;
            box-shadow: var(--shadow-xl);
            min-width: 200px;
            opacity: 0;
            visibility: hidden;
            transition: 0.2s;
        }
        .has-dropdown:hover .dropdown {
            opacity: 1;
            visibility: visible;
        }
        .dropdown a {
            display: block;
            padding: 0.75rem 1.25rem;
            color: var(--dark);
            text-decoration: none;
            border-bottom: 1px solid #eee;
        }
        .dropdown a:hover {
            background: #f8fafc;
            color: var(--primary);
        }
        .mobile-toggle {
            width: 44px;
            height: 44px;
            background: #f1f5f9;
            border-radius: 12px;
            border: none;
            cursor: pointer;
            font-size: 1.25rem;
        }
        @media (min-width: 1024px) { .mobile-toggle { display: none; } }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
            padding: 0.6rem 1.2rem;
            border-radius: 40px;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        /* Mobile Menu */
        .mobile-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 200;
            opacity: 0;
            visibility: hidden;
            transition: 0.3s;
        }
        .mobile-overlay.active { opacity: 1; visibility: visible; }
        .mobile-menu {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 320px;
            height: 100vh;
            background: white;
            z-index: 201;
            transition: right 0.3s;
            overflow-y: auto;
        }
        .mobile-menu.active { right: 0; }
        .mobile-menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.25rem;
            background: var(--gradient-primary);
            color: white;
        }
        .mobile-menu-close {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.2);
            border-radius: 10px;
            border: none;
            color: white;
            font-size: 1.2rem;
            cursor: pointer;
        }
        .mobile-nav { padding: 1.25rem; }
        .mobile-nav a {
            display: block;
            padding: 0.75rem 1rem;
            color: var(--dark);
            text-decoration: none;
            border-radius: 12px;
            margin-bottom: 0.5rem;
        }
        .mobile-nav a:hover {
            background: #f8fafc;
            color: var(--primary);
        }
        .btn-full {
            display: block;
            text-align: center;
        }
        
        .content-wrapper {
            max-width: 1400px;
            margin: 0 auto;
            padding: 3rem 1.5rem;
        }
        
        /* عنوان و خط رنگی */
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0;
        }
        .section-line {
            width: 80px;
            height: 4px;
            background: linear-gradient(to left, var(--primary), var(--secondary));
            margin: 1rem auto 0;
            border-radius: 9999px;
        }
        
        /* کارت‌های المپیاد - 3 تایی */
        .olympiads-grid {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .olympiad-card {
            display: block;
            background: var(--white);
            border-radius: 24px;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-lg);
            flex: 1;
            max-width: 350px;
            min-width: 280px;
            cursor: pointer;
            text-decoration: none;
            border: 1px solid #e2e8f0;
        }
        .olympiad-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-xl);
        }
        .olympiad-image {
            width: 100%;
            background-color: #e2e8f0;
            overflow: hidden;
        }
        .olympiad-image img {
            width: 100%;
            height: 260px;
            display: block;
            object-fit: cover;
            object-position: center;
            transition: transform 0.4s;
        }
        .olympiad-card:hover .olympiad-image img {
            transform: scale(1.05);
        }
        
        /* FOOTER */
        .footer {
            background: linear-gradient(180deg, #0f172a, #1a1a2e);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand { flex: 2; min-width: 200px; }
        .footer-links { flex: 1; min-width: 150px; }
        .footer-links h4 {
            margin-bottom: 1rem;
            padding-right: 0.75rem;
            border-right: 3px solid var(--primary);
        }
        .footer-links ul { list-style: none; }
        .footer-links li { margin-bottom: 0.5rem; }
        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.85rem;
        }
        .footer-links a:hover { color: white; }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .social-links {
            display: flex;
            gap: 0.8rem;
        }
        .social-links a {
            width: 36px;
            height: 36px;
            background: #334155;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            text-decoration: none;
        }
        .social-links a:hover {
            background: var(--primary);
            color: white;
        }
        
        .scroll-top {
            position: fixed;
            bottom: 25px;
            left: 25px;
            width: 45px;
            height: 45px;
            background: var(--gradient-primary);
            color: white;
            border-radius: 50%;
            border: none;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: 0.3s;
            z-index: 99;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }
        
        @media (max-width: 768px) {
            .container { padding: 0 1rem; }
            .olympiad-card { max-width: 100%; }
            .olympiad-image img { height: 200px; }
            .section-header h2 { font-size: 1.5rem; }
        }