:root{--bg-dark:#0f172a;--panel-bg:rgba(30,41,59,0.7);--panel-border:rgba(255,255,255,0.1);--primary:#3b82f6;--primary-hover:#2563eb;--accent:#8b5cf6;--text-main:#f8fafc;--text-muted:#94a3b8;}body.dark-theme{background-color:var(--bg-dark);color:var(--text-main);font-family:'Inter',sans-serif;margin:0;padding:0;line-height:1.6;}.container{max-width:1200px;margin:0 auto;padding:2rem;}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background:rgba(15,23,42,0.8);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--panel-border);position:sticky;top:0;z-index:100;}.app-header .logo{font-family:'Outfit',sans-serif;font-weight:800;font-size:1.5rem;color:var(--primary);text-shadow:0 0 10px rgba(59,130,246,0.5);}.nav-links a{color:var(--text-main);text-decoration:none;margin-left:1.5rem;font-weight:500;transition:color 0.2s;}.nav-links a:hover,.nav-links a.active{color:var(--primary);}.hero{text-align:center;padding:4rem 0 2rem;}.glow-text{font-family:'Outfit',sans-serif;font-size:3rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:1rem;text-shadow:0 0 30px rgba(59,130,246,0.3);}.subtitle{font-size:1.2rem;color:var(--text-muted);max-width:800px;margin:0 auto;}.exam-section{margin-top:4rem;}.exam-section-title{font-family:'Outfit',sans-serif;font-size:2rem;border-bottom:2px solid var(--panel-border);padding-bottom:0.5rem;margin-bottom:2rem;display:flex;align-items:center;gap:1rem;}.exam-section-title::before{content:'';display:block;width:6px;height:30px;background:var(--primary);border-radius:4px;}.lang-group{margin-bottom:3rem;}.lang-title{font-size:1.25rem;color:var(--text-muted);margin-bottom:1rem;display:flex;align-items:center;gap:0.5rem;}.mock-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;}.mock-card{display:block;text-decoration:none;color:inherit;background:var(--panel-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--panel-border);border-radius:12px;padding:1.5rem;cursor:pointer;transition:transform 0.3s ease,border-color 0.3s ease,box-shadow 0.3s ease;position:relative;overflow:hidden;}.mock-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary),var(--accent));opacity:0;transition:opacity 0.3s ease;}.mock-card:hover{transform:translateY(-5px);border-color:rgba(59,130,246,0.4);box-shadow:0 10px 30px rgba(0,0,0,0.3),0 0 15px rgba(59,130,246,0.1);}.mock-card:hover::before{opacity:1;}.mock-title{font-family:'Outfit',sans-serif;font-size:1.4rem;font-weight:600;margin:0 0 0.5rem 0;}.mock-meta{display:flex;justify-content:space-between;color:var(--text-muted);font-size:0.9rem;margin-top:1rem;padding-top:1rem;border-top:1px solid rgba(255,255,255,0.05);}.start-btn{display:inline-block;margin-top:1.5rem;padding:0.5rem 1rem;background:rgba(59,130,246,0.1);color:var(--primary);border-radius:6px;font-weight:600;font-size:0.9rem;transition:background 0.3s,color 0.3s;}.mock-card:hover .start-btn{background:var(--primary);color:white;}.ad-banner{background:var(--panel-bg);border:1px dashed var(--panel-border);border-radius:8px;padding:1rem;text-align:center;min-height:90px;margin:2rem 0;}.mt-5{margin-top:3rem;}.app-footer{text-align:center;padding:2rem;color:var(--text-muted);border-top:1px solid var(--panel-border);margin-top:4rem;}