:root{--primary: #0f4c5c;--primary-light: #1a6b7e;--primary-dark: #0a3540;--secondary: #c9a227;--secondary-light: #d4b84a;--accent: #5f0f40;--success: #2d6a4f;--warning: #b08900;--error: #9b2226;--neutral-100: #f8f9fa;--neutral-200: #e9ecef;--neutral-300: #dee2e6;--neutral-400: #ced4da;--neutral-500: #adb5bd;--neutral-600: #6c757d;--neutral-700: #495057;--neutral-800: #343a40;--neutral-900: #212529;--font-family: "Cairo", sans-serif;--radius: 8px;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow: 0 4px 6px rgba(0,0,0,.07);--shadow-lg: 0 10px 25px rgba(0,0,0,.1);--shadow-xl: 0 20px 40px rgba(0,0,0,.15);--transition: .3s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:80px}body{font-family:var(--font-family);background:var(--neutral-100);color:var(--neutral-800);line-height:1.6;font-size:16px;overflow-x:hidden;direction:rtl}img{max-width:100%;display:block;border-radius:var(--radius)}a{text-decoration:none;color:inherit}ul{list-style:none}nav{position:fixed;top:0;right:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:space-between;padding:0 48px;height:72px;background:#ffffffd9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--neutral-200);transition:var(--transition)}nav.scrolled{background:#fffffff2;box-shadow:var(--shadow);height:64px}.logo{font-weight:700;font-size:1.15rem;color:var(--primary);letter-spacing:-.02em}nav ul{display:flex;gap:28px;align-items:center}nav ul a{font-size:.9rem;font-weight:600;color:var(--neutral-700);position:relative;padding:4px 0;transition:var(--transition)}nav ul a:after{content:"";position:absolute;bottom:0;right:0;width:0;height:2px;background:var(--secondary);transition:var(--transition)}nav ul a:hover,nav ul a.active{color:var(--primary)}nav ul a:hover:after,nav ul a.active:after{width:100%}.menu-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}.menu-toggle span{display:block;width:24px;height:2px;background:var(--neutral-800);transition:var(--transition);border-radius:1px}.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu-toggle.active span:nth-child(2){opacity:0}.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.hero{min-height:100vh;display:flex;align-items:center;gap:64px;padding:120px 48px 80px;max-width:1200px;margin:0 auto;background:linear-gradient(135deg,var(--neutral-100) 0%,#f0f4f5 100%)}.hero-image{flex-shrink:0;position:relative}.hero-image img{width:380px;height:500px;object-fit:cover;border-radius:16px;box-shadow:var(--shadow-xl)}.hero-image:before{content:"";position:absolute;top:20px;right:-20px;width:100%;height:100%;border:3px solid var(--secondary);border-radius:16px;z-index:-1;opacity:.6}.hero-text h1{font-size:3rem;font-weight:700;color:var(--neutral-900);margin-bottom:12px;line-height:1.2}.hero-text h2{font-size:1.4rem;font-weight:600;color:var(--primary);margin-bottom:24px}.hero-text p{font-size:1.05rem;color:var(--neutral-700);line-height:1.8;margin-bottom:32px;max-width:600px}.btn{display:inline-block;padding:14px 36px;background:var(--primary);color:#fff;font-weight:600;font-size:1rem;border-radius:var(--radius);transition:var(--transition);box-shadow:var(--shadow);border:2px solid var(--primary)}.btn:hover{background:transparent;color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-lg)}section{padding:80px 48px;max-width:1200px;margin:0 auto}.section-title{text-align:center;margin-bottom:48px}.section-title h2{font-size:2.2rem;font-weight:700;color:var(--neutral-900);position:relative;display:inline-block;padding-bottom:16px}.section-title h2:after{content:"";position:absolute;bottom:0;right:50%;transform:translate(50%);width:60px;height:4px;background:var(--secondary);border-radius:2px}.about-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:center}.about-grid img{width:100%;height:400px;object-fit:cover;border-radius:16px;box-shadow:var(--shadow-lg)}.about-grid p{font-size:1.1rem;color:var(--neutral-700);line-height:1.8}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px}.card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);border:1px solid var(--neutral-200)}.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:var(--neutral-300)}.card img{width:100%;height:220px;object-fit:cover;border-radius:0}.card h3{font-size:1.2rem;font-weight:700;color:var(--neutral-900);padding:20px 24px 8px}.card p{font-size:.95rem;color:var(--neutral-600);padding:0 24px 24px}.timeline{display:flex;flex-direction:column;gap:32px}.timeline-item{display:flex;align-items:center;gap:24px;background:#fff;padding:24px;border-radius:16px;box-shadow:var(--shadow);border:1px solid var(--neutral-200);transition:var(--transition)}.timeline-item:hover{transform:translate(-4px);box-shadow:var(--shadow-lg)}.timeline-item img{width:80px;height:80px;object-fit:cover;border-radius:12px;flex-shrink:0}.timeline-item h3{font-size:1.2rem;font-weight:700;color:var(--neutral-900);margin-bottom:6px}.timeline-item 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p{font-size:.95rem;opacity:.9}.research-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px}.journal{display:flex;gap:20px;background:#fff;padding:24px;border-radius:16px;box-shadow:var(--shadow);border:1px solid var(--neutral-200);transition:var(--transition);align-items:flex-start}.journal:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.journal img{width:140px;height:180px;object-fit:cover;border-radius:12px;flex-shrink:0}.journal h3{font-size:1.15rem;font-weight:700;color:var(--neutral-900);margin-bottom:8px}.journal p{font-size:.95rem;color:var(--neutral-600);line-height:1.6}.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:32px}.news-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--neutral-200);transition:var(--transition)}.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl)}.news-card img{width:100%;height:240px;object-fit:cover;border-radius:0}.news-card h3{font-size:1.2rem;font-weight:700;color:var(--neutral-900);padding:20px 24px 8px}.news-card p{font-size:.95rem;color:var(--neutral-600);padding:0 24px 24px}.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:32px}.video-card{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);cursor:pointer;transition:var(--transition)}.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl)}.video-card img{width:100%;height:280px;object-fit:cover;border-radius:0}.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:72px;height:72px;background:#fffffff2;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);transition:var(--transition)}.play-btn span{font-size:1.6rem;color:var(--primary);margin-left:4px}.video-card:hover .play-btn{transform:translate(-50%,-50%) 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var(--neutral-200);transition:var(--transition);text-align:center}.award-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl)}.award-card img{width:100%;height:200px;object-fit:cover;border-radius:0}.award-card h3{font-size:1.2rem;font-weight:700;color:var(--neutral-900);padding:20px 24px 8px}.award-card p{font-size:.95rem;color:var(--neutral-600);padding:0 24px 24px}footer{background:var(--neutral-900);color:var(--neutral-400);padding:64px 48px 32px;margin-top:80px}.footer-content{max-width:1200px;margin:0 auto 48px;display:grid;grid-template-columns:1fr 2fr 1fr;gap:48px;align-items:center}.footer-logo{font-size:1.3rem;font-weight:700;color:#fff}.footer-links{display:flex;gap:32px;justify-content:center}.footer-links a{font-size:.95rem;font-weight:600;color:var(--neutral-400);transition:var(--transition)}.footer-links a:hover{color:var(--secondary)}.footer-social{display:flex;gap:16px;justify-content:flex-end}.footer-social a{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--neutral-800);border-radius:50%;font-size:.85rem;font-weight:700;color:var(--neutral-400);transition:var(--transition)}.footer-social a:hover{background:var(--secondary);color:var(--neutral-900);transform:translateY(-3px)}.footer-bottom{text-align:center;font-size:.85rem;color:var(--neutral-600);border-top:1px solid var(--neutral-800);padding-top:24px;max-width:1200px;margin:0 auto}.scroll-top{position:fixed;bottom:32px;left:32px;width:48px;height:48px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700;box-shadow:var(--shadow-lg);transition:var(--transition);opacity:0;pointer-events:none;z-index:999;border:2px solid var(--primary)}.scroll-top.visible{opacity:1;pointer-events:auto}.scroll-top:hover{background:transparent;color:var(--primary);transform:translateY(-3px)}.reveal{opacity:0;transform:translateY(40px);transition:opacity .8s cubic-bezier(.4,0,.2,1),transform .8s cubic-bezier(.4,0,.2,1)}.reveal.visible{opacity:1;transform:translateY(0)}@media(max-width:1024px){.hero{flex-direction:column;text-align:center;gap:48px}.hero-image img{width:300px;height:400px}.hero-text p{max-width:100%}.about-grid{grid-template-columns:1fr}.journal{flex-direction:column}.journal img{width:100%;height:200px}.footer-content{grid-template-columns:1fr;text-align:center;gap:24px}.footer-social{justify-content:center}}@media(max-width:768px){nav{padding:0 24px}nav ul{position:fixed;top:72px;right:0;left:0;background:#fffffffa;flex-direction:column;padding:24px 0;gap:16px;transform:translateY(-100%);opacity:0;pointer-events:none;transition:var(--transition);border-bottom:1px solid var(--neutral-200);box-shadow:var(--shadow-lg)}nav ul.open{transform:translateY(0);opacity:1;pointer-events:auto}.menu-toggle{display:flex}.hero{padding:120px 24px 60px}.hero-text h1{font-size:2rem}.hero-text h2{font-size:1.1rem}.hero-image img{width:260px;height:340px}section{padding:60px 24px}.section-title h2{font-size:1.7rem}.cards,.spotlight,.research-grid,.news-grid,.video-grid,.courses-grid,.awards-grid{grid-template-columns:1fr}.timeline-item{flex-direction:column;text-align:center}.footer-links{flex-direction:column;gap:12px}.scroll-top{bottom:20px;left:20px;width:44px;height:44px}}#about{background:#fff}#experience{background:linear-gradient(180deg,#fff 0%,var(--neutral-100) 100%)}#research{background:#fff}#videos{background:linear-gradient(180deg,var(--neutral-100) 0%,#fff 100%)}#courses{background:#fff}