:root{--base-font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";--lang-font-family:var(--base-font-family)}:lang(fa):not(i){--lang-font-family:'Vazirmatn',var(--base-font-family);font-family:var(--lang-font-family)}:lang(ar):not(i){--lang-font-family:'Noto Sans Arabic',var(--base-font-family);font-family:var(--lang-font-family)}:lang(ja):not(i){--lang-font-family:'Noto Sans JP',var(--base-font-family);font-family:var(--lang-font-family)}:lang(ko):not(i){--lang-font-family:'Noto Sans KR',var(--base-font-family);font-family:var(--lang-font-family)}:lang(zh):not(i){--lang-font-family:'Noto Sans SC',var(--base-font-family);font-family:var(--lang-font-family)}:lang(zh-tw):not(i){--lang-font-family:'Noto Sans TC',var(--base-font-family);font-family:var(--lang-font-family)}:lang(vi):not(i){--lang-font-family:'Noto Sans Vietnamese','Noto 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ease;white-space:nowrap;font-family:var(--base-font-family)!important}.language-btn:hover{background:var(--primary-accent);color:white}.language-btn i:first-child{font-size:.9rem}.language-btn i:last-child{font-size:.6rem;transition:transform .3s ease}.language-btn.open i:last-child{transform:rotate(180deg)}.language-dropdown{position:absolute;top:calc(100%+0.5rem);right:0;background:white;border:2px solid var(--primary-accent);border-radius:12px;box-shadow:var(--shadow-lg);min-width:160px;max-height:400px;overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .3s ease;z-index:1000;scrollbar-width:none;-ms-overflow-style:none}.language-dropdown::-webkit-scrollbar{display:none}html[dir="rtl"] .language-dropdown{right:auto;left:0}.language-dropdown.show{opacity:1;visibility:visible;transform:translateY(0)}.language-option{display:flex;align-items:center;justify-content:space-between;padding:.5rem .75rem;color:var(--text-dark);text-decoration:none;transition:all .2s ease;border-bottom:1px solid #f0f0f0;gap:.5rem}.language-option:last-child{border-bottom:none}.language-option:hover{background:#f8f9fa;color:var(--primary-accent)}.language-option.active{background:rgba(74,85,104,0.1);color:var(--primary-accent);font-weight:600}.language-option .lang-name{font-size:.8rem;flex:1;white-space:nowrap}.language-option .lang-code{font-size:.65rem;color:#718096;text-transform:uppercase;padding:.1rem .3rem;font-weight:500}.page-header-wrapper{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}@media(max-width:576px){.page-header-wrapper{flex-direction:column;gap:1rem;align-items:flex-start}html[dir="rtl"] .page-header-wrapper{align-items:flex-start}}:root{--primary-accent:#4a5568;--primary-accent-dark:#2d3748;--primary-accent-light:#718096;--primary-accent-hover:#2c5282;--navbar-bg:#222;--navbar-text:#ddd;--primary-dark:#1a1a2e;--secondary-dark:#16213e;--accent-color:#4a5568;--text-dark:#1a1a1a;--text-light:#666;--bg-light:#f8f9fa;--gradient-primary:linear-gradient(135deg,var(--primary-accent) 0,var(--primary-accent-dark) 100%);--gradient-secondary:linear-gradient(135deg,#667eea 0,#764ba2 100%);--shadow-sm:0 2px 8px rgba(0,0,0,0.08);--shadow-md:0 4px 16px rgba(0,0,0,0.12);--shadow-lg:0 8px 32px rgba(0,0,0,0.16);--shadow-xl:0 16px 48px rgba(0,0,0,0.2)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;height:100%;font-size:16px}body{font-family:var(--lang-font-family);font-size:1rem;color:var(--text-dark);line-height:1.7;overflow-x:hidden;min-height:100%;display:flex;flex-direction:column;-webkit-text-size-adjust:100%;text-size-adjust:100%}main{flex:1 0 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h1{font-family:var(--lang-font-family);font-size:1.75rem;font-weight:700;margin-bottom:.5rem}.hero-subtitle{font-size:1.1rem;font-weight:300;margin-bottom:1rem;color:var(--text-light)}.hero-description{font-size:1rem;margin:0 0 1rem;color:var(--text-light);line-height:1.6}.social-links-hero{display:flex;gap:.75rem;justify-content:flex-start;margin-bottom:0}.social-link{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:white;border:2px solid var(--primary-accent);border-radius:50%;color:var(--primary-accent)!important;font-size:1.1rem;text-decoration:none;transition:all .3s ease}.social-link i{color:var(--primary-accent)!important}.social-link:hover{background:var(--primary-accent);color:white!important;border-color:var(--primary-accent)}.social-link:hover i{color:white!important}.section-modern{padding:20px 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transparent;white-space:nowrap}.btn-book-primary{background:var(--gradient-primary);color:white;box-shadow:var(--shadow-sm)}.btn-book-primary:hover{background:var(--primary-accent-dark);transform:translateY(-2px);box-shadow:var(--shadow-md);color:white}.btn-book-secondary{background:white;color:var(--primary-accent);border-color:var(--primary-accent)}.btn-book-secondary:hover{background:var(--primary-accent);color:white;transform:translateY(-2px);box-shadow:var(--shadow-md)}.book-footer{background:#f5f5f5;border-top:2px solid #e0e0e0;padding:.75rem .75rem;display:flex;justify-content:center;align-items:center;flex-wrap:nowrap;margin-top:auto;gap:.5rem}.book-footer .badge-custom{padding-left:.75rem;padding-right:.75rem;white-space:nowrap;font-size:.8rem}.badge-custom .badge-paper-icon{vertical-align:middle;margin-right:.25em;display:inline-block;flex-shrink:0;width:18px;height:18px}.badge-custom 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.badge-custom{width:100%;justify-content:center}}.education-card{display:flex;align-items:center;gap:1.25rem;padding:1rem 1.25rem;background:white;border-radius:8px;box-shadow:var(--shadow-sm);margin-bottom:.75rem}.education-logo{flex-shrink:0}.education-logo img{width:100px;height:auto}.education-content h5{color:var(--text-dark);font-weight:700;margin-bottom:.5rem;font-size:1.1rem}.education-content ul{margin:0;padding-left:1.2rem;list-style-type:disc}.education-content ul li{margin-bottom:.35rem;color:var(--text-light);font-size:.95rem;line-height:1.5}.publication-item{display:flex;gap:1.25rem;padding:1rem 1.25rem;background:white;border-radius:8px;box-shadow:var(--shadow-sm);margin-bottom:.75rem;align-items:center}.publication-image{flex-shrink:0;width:100px;display:flex;align-items:flex-start;justify-content:center}.publication-image img{width:100%;height:auto;object-fit:contain;display:block}.publication-content{flex:1;min-width:0}.publication-title{font-family:var(--lang-font-family)!important;font-weight:700;font-size:1.05rem;color:var(--text-dark);margin-bottom:.35rem;line-height:1.4}.publication-authors,.publication-venue{font-family:var(--lang-font-family)!important}.publication-authors{color:var(--text-light);margin-bottom:.25rem;font-size:.95rem}.publication-venue{font-style:italic;color:var(--primary-accent);margin-bottom:.65rem;font-size:.95rem}.publication-links{display:flex;gap:.5rem;flex-wrap:wrap}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;padding:.5rem 0}.video-card{text-decoration:none;color:inherit;transition:all .3s ease;border-radius:8px;overflow:hidden;background:white;box-shadow:var(--shadow-md);border:2px solid #dee2e6;display:block}.video-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-accent);text-decoration:none;transform:translateY(-4px)}.video-thumbnail-wrapper{position:relative;width:100%;padding-top:56.25%;overflow:hidden;background:#000}.video-thumbnail{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}.video-play-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:70px;height:70px;background:rgba(74,85,104,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;font-size:2.5rem;transition:all .3s ease;pointer-events:none}.video-card:hover .video-play-overlay{background:rgba(74,85,104,1);transform:translate(-50%,-50%) scale(1.15)}.video-duration-badge{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,0.85);color:white;padding:.35rem .6rem;border-radius:4px;font-size:.8rem;font-weight:600;pointer-events:none}@media(max-width:1200px){.video-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.25rem}}@media(max-width:576px){.video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem}.video-play-overlay{width:60px;height:60px;font-size:2rem}}@media(max-width:576px){.video-grid{grid-template-columns:1fr;gap:1rem}.video-play-overlay{width:70px;height:70px;font-size:2.5rem}}.video-carousel-wrapper{position:relative;display:flex;align-items:center;gap:1rem}.video-carousel-container{flex:1;overflow:hidden;padding:.5rem 0}.video-carousel{display:flex;gap:1.5rem;overflow-x:auto;overflow-y:hidden;scroll-behavior:smooth;scroll-snap-type:x mandatory;padding:.5rem 0;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none}.video-carousel::-webkit-scrollbar{display:none}.video-carousel .video-card{flex:0 0 280px;scroll-snap-align:start;text-decoration:none;color:inherit;transition:all .3s ease;border-radius:8px;overflow:hidden;background:white;box-shadow:var(--shadow-md);border:2px solid #dee2e6;display:block}.video-carousel .video-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-accent);text-decoration:none;transform:translateY(-4px)}.video-carousel .video-play-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:60px;height:60px;background:rgba(74,85,104,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;font-size:2rem;transition:all .3s ease;pointer-events:none}.video-carousel .video-card:hover .video-play-overlay{background:rgba(74,85,104,1);transform:translate(-50%,-50%) scale(1.1)}.video-carousel .video-duration-badge{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.85);color:white;padding:.25rem .5rem;border-radius:4px;font-size:.75rem;font-weight:600;pointer-events:none}.carousel-nav{flex-shrink:0;width:40px;height:40px;border-radius:50%;border:2px solid var(--primary-accent);background:white;color:var(--primary-accent);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease;font-size:1rem;z-index:10}.carousel-nav:hover{background:var(--primary-accent);color:white;transform:scale(1.1)}.carousel-nav:active{transform:scale(0.95)}.carousel-nav:disabled{opacity:.3;cursor:not-allowed}.carousel-nav:disabled:hover{background:white;color:var(--primary-accent);transform:scale(1)}@media(max-width:576px){.video-carousel .video-card{flex:0 0 220px}.video-carousel .video-play-overlay{width:50px;height:50px;font-size:1.5rem}.carousel-nav{width:36px;height:36px;font-size:.9rem}}@media(max-width:480px){.video-carousel .video-card{flex:0 0 260px}.video-carousel{gap:1rem}.carousel-nav{width:32px;height:32px;font-size:.85rem}.video-carousel-wrapper{gap:.5rem}}.teaching-carousel-wrapper{position:relative;display:flex;align-items:center;gap:1rem;margin-bottom:2rem}.teaching-carousel-container{flex:1;overflow:hidden;padding:.5rem 0}.teaching-carousel{display:flex;gap:1.5rem;overflow-x:auto;overflow-y:hidden;scroll-behavior:smooth;scroll-snap-type:x mandatory;padding:.5rem 0;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none}.teaching-carousel::-webkit-scrollbar{display:none}.teaching-card-wrapper{flex:0 0 360px;scroll-snap-align:start}@media(max-width:991px){.teaching-card-wrapper{flex:0 0 340px}}@media(max-width:576px){.teaching-card-wrapper{flex:0 0 300px}.teaching-carousel{gap:1rem}}@media(max-width:480px){.teaching-card-wrapper{flex:0 0 280px}.teaching-carousel-wrapper{gap:.5rem}}.footer-modern{background:var(--navbar-bg);color:var(--navbar-text);padding:20px 0 15px;text-align:center;margin-top:auto}.footer-modern .container{max-width:100%;padding:0}.footer-social{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center;margin-bottom:0;padding:0 1rem}.footer-social a{display:inline-flex;align-items:center;justify-content:center;width:60px;height:60px;min-width:60px;min-height:60px;flex-shrink:0;background:rgba(255,255,255,0.1);border-radius:50%;color:white;font-size:1.5rem;text-decoration:none}.footer-social a:hover{background:rgba(255,255,255,0.3)}@media(max-width:480px){.footer-social{gap:.5rem}.footer-social a{width:45px;height:45px;min-width:45px;min-height:45px;font-size:1.2rem}}.footer-text{color:rgba(255,255,255,0.95);margin-top:1.5rem}.footer-text p{margin:0}@media(max-width:575px){.navbar-custom{padding:0!important}.navbar-custom .container-fluid{padding:0 .75rem!important}.navbar-header{width:auto}.navbar-center-toggle{display:flex}.navbar-toggler{margin:0}.navbar-collapse{background:#222;margin-top:0;border-top:1px solid rgba(255,255,255,0.1)}.navbar-nav{padding:.5rem 0}.navbar-nav.navbar-center{position:static;transform:none}.nav-item{height:auto}.nav-link{padding:.35rem .25rem!important;font-size:.85rem}.navbar-brother-link{padding:0!important;margin:0!important;min-height:auto}.navbar-brother-link:hover .navbar-brother-text{background:rgba(255,255,255,0.1);color:white!important}}@media(max-width:576px){html{font-size:14px}.hero-content{flex-direction:column;text-align:center;gap:1rem}.hero-details{text-align:center}.social-links-hero{justify-content:center}.hero-content h1{font-size:1.5rem}.hero-subtitle{font-size:1.1rem}.section-title{font-size:1.5rem}.education-card,.publication-item{gap:1rem;padding:.75rem 1rem}.education-logo img,.publication-image{width:80px}.card-modern img{height:120px}.navbar-text{font-size:.85rem;padding:.35rem .25rem}.navbar-brother-text{display:block;font-size:.85rem;padding:.35rem .25rem}.navbar-brother-link{gap:.4rem}.navbar-left{gap:.4rem}.navbar-brother-logo{height:24px}}.breadcrumb-custom{display:flex;flex-wrap:wrap;padding:0;margin-bottom:1rem;list-style:none}.breadcrumb-item-custom{display:flex;align-items:center}.breadcrumb-item-custom+.breadcrumb-item-custom::before{display:inline-block;padding-right:.5rem;padding-left:.5rem;color:var(--text-light);content:"/"}.breadcrumb-item-custom a{color:var(--primary-accent);font-weight:500;transition:color .3s ease}.breadcrumb-item-custom a:hover{color:var(--primary-accent-dark)}.breadcrumb-item-custom.active{color:var(--text-light)}.course-header h2{font-size:2rem}.lead-modern{font-size:1.1rem;line-height:1.8;color:var(--text-dark)}.text-accent{color:var(--primary-accent);font-weight:600}.italic{font-style:italic}