:root{--bg: #f8f9fa;--bg-deep: #f8f9fa;--card: rgba(255, 255, 255, .9);--card-border: rgba(102, 126, 234, .12);--text: #333;--muted: #666;--accent: #667eea;--accent-dark: #764ba2;--shadow: 0 24px 60px rgba(102, 126, 234, .16)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text);overflow-x:hidden;background:radial-gradient(circle at top left,rgba(255,255,255,.75),transparent 36%),radial-gradient(circle at bottom right,rgba(184,98,55,.18),transparent 32%),linear-gradient(135deg,var(--bg) 0%,#efe2cf 48%,var(--bg-deep) 100%);min-height:100vh}nav,.dashboard-header{background:linear-gradient(135deg,var(--accent) 0%,var(--accent-dark) 100%);padding:1rem 2rem;position:sticky;top:0;z-index:100;box-shadow:0 2px 10px #0000001a}nav .container,.header-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}nav .logo,.brand{font-size:1.8rem;font-weight:700;color:#fff}nav ul{display:flex;list-style:none;gap:2rem}nav a{color:#fff;text-decoration:none;transition:opacity .3s;font-weight:500}nav a:hover{opacity:.8}.container{max-width:1200px;margin:0 auto;padding:0 2rem}.hero{background:linear-gradient(135deg,var(--accent) 0%,var(--accent-dark) 100%);color:#fff;padding:120px 2rem;text-align:center;position:relative;overflow:hidden;scroll-margin-top:80px}.hero:before{content:"";position:absolute;top:-50%;right:-10%;width:400px;height:400px;background:#ffffff1a;border-radius:50%;animation:float 6s ease-in-out infinite}.hero:after{content:"";position:absolute;bottom:-30%;left:-5%;width:300px;height:300px;background:#ffffff0d;border-radius:50%;animation:float 8s ease-in-out infinite reverse}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(30px)}}.hero .content{position:relative;z-index:1;max-width:800px;margin:0 auto}.hero h1{font-size:3.5rem;margin-bottom:1.5rem;animation:slideDown .8s ease-out}.hero p{font-size:1.3rem;margin-bottom:2rem;opacity:.95;animation:slideUp .8s ease-out .2s both}@keyframes slideDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.cta-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;animation:slideUp .8s ease-out .4s both}.btn{padding:1rem 2.5rem;font-size:1.1rem;border:none;border-radius:50px;cursor:pointer;transition:all .3s ease;font-weight:600;text-decoration:none;display:inline-block}.btn-primary{background:#fff;color:var(--accent)}.btn-primary:hover{transform:translateY(-3px);box-shadow:0 10px 25px #0003}.btn-secondary{background:#fff3;color:#fff;border:2px solid white}.btn-secondary:hover{background:#ffffff4d;transform:translateY(-3px)}.btn-apple{background:#000;color:#fff;border:none}.btn-apple:hover{background:#222}.btn-small{padding:.75rem 1.5rem;font-size:.95rem}.hidden{display:none!important}.auth-status{margin-top:1rem;min-height:1.5rem;font-weight:600;color:#fff}.features,main.dashboard-main-content{padding:80px 2rem;background:#f8f9fa;scroll-margin-top:80px}.section-title{text-align:center;font-size:2.5rem;margin-bottom:3rem;color:#333}.features-grid,.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.feature-card,.dashboard-card{background:#fff;padding:2.5rem;border-radius:10px;text-align:center;box-shadow:0 5px 20px #00000014;transition:all .3s ease}.feature-card:hover,.dashboard-card:hover{transform:translateY(-10px);box-shadow:0 15px 40px #00000026}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-card h3,.dashboard-card h2{font-size:1.5rem;margin-bottom:1rem;color:var(--accent)}.feature-card p,.dashboard-card p{color:var(--muted);line-height:1.8}.exam-types{padding:80px 2rem;background:#fff;scroll-margin-top:80px}.exam-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:3rem}.exam-card{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:2rem;border-radius:10px;text-align:center;cursor:pointer;transition:all .3s ease}.exam-card:hover{transform:scale(1.05);box-shadow:0 10px 30px #667eea4d}.exam-card h3{font-size:1.5rem;margin-bottom:1rem}.exam-card p{font-size:.95rem;opacity:.9}.stats{padding:80px 2rem;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-dark) 100%);color:#fff;text-align:center;scroll-margin-top:80px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-top:3rem}.stat-item h2{font-size:2.5rem;margin-bottom:.5rem}.stat-item p{font-size:1.1rem;opacity:.9}.cta-section{padding:80px 2rem;background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff;text-align:center;scroll-margin-top:80px}.cta-section h2{font-size:2.5rem;margin-bottom:1.5rem}.cta-section p{font-size:1.2rem;margin-bottom:2rem}footer{background:#222;color:#fff;padding:3rem 2rem 1rem;text-align:center}.footer-content{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem;text-align:left}.footer-section h4{margin-bottom:1rem;color:#f093fb}.footer-section ul{list-style:none}.footer-section ul li{margin-bottom:.5rem}.footer-section a{color:#aaa;text-decoration:none;transition:color .3s}.footer-section a:hover{color:#f093fb}.footer-bottom{border-top:1px solid #444;padding-top:2rem}.dashboard-header{position:static;box-shadow:none}.dashboard-header .user-actions{display:flex;align-items:center;gap:1rem;font-size:.95rem}.dashboard-header .user-actions span{color:#fff}.dashboard-header .user-actions .btn{padding:.75rem 1.25rem;font-size:.95rem;background:#fff;color:var(--accent)}.dashboard-header .user-actions .btn:hover{background:#f0f0f0;transform:translateY(-2px);box-shadow:0 5px 15px #0000001a}main.dashboard-main-content{padding:3rem 2rem;max-width:1100px;margin:0 auto;background:transparent}.welcome{margin-bottom:2rem}.welcome h1{font-size:2.4rem;margin-bottom:.5rem;color:#333}.welcome p{color:var(--muted);font-size:1rem;margin-bottom:2rem}.quiz-loading{display:flex;align-items:center;justify-content:center;min-height:60vh;font-size:1.1rem;color:var(--muted)}.quiz-container{max-width:760px;margin:0 auto;padding:2rem}.quiz-header{margin-bottom:2rem;text-align:center}.quiz-header h2{font-size:2rem;color:var(--accent);margin-bottom:.5rem}.quiz-header p{color:var(--muted)}.quiz-question-card{background:#fff;border-radius:10px;padding:1.75rem;margin-bottom:1.25rem;box-shadow:0 3px 12px #00000012;border-left:4px solid var(--accent)}.quiz-question-card.result-correct{border-left-color:#22c55e}.quiz-question-card.result-wrong{border-left-color:#ef4444}.quiz-question-number{font-size:.85rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}.quiz-type-badge{background:#667eea1f;color:var(--accent);padding:2px 8px;border-radius:999px;font-size:.78rem;text-transform:capitalize;margin-left:6px}.quiz-question-text{font-size:1.05rem;font-weight:500;color:var(--text);margin-bottom:1rem;line-height:1.6}.quiz-options{list-style:none;display:flex;flex-direction:column;gap:.5rem}.quiz-option{display:flex;align-items:center;gap:.75rem;padding:.7rem 1rem;border-radius:8px;border:1.5px solid rgba(102,126,234,.2);cursor:pointer;transition:background .2s,border-color .2s;font-size:.97rem}.quiz-option:hover{background:#667eea0f;border-color:var(--accent)}.quiz-option input[type=radio]{accent-color:var(--accent);width:16px;height:16px;flex-shrink:0}.quiz-submit-row{display:flex;gap:1rem;justify-content:center;margin-top:2rem;flex-wrap:wrap}.quiz-results-header{text-align:center;margin-bottom:2rem}.quiz-results-header h2{font-size:2rem;color:var(--accent);margin-bottom:.75rem}.quiz-score-badge{display:inline-block;font-size:3rem;font-weight:700;color:var(--accent);line-height:1;margin-bottom:.5rem}.quiz-score-percent{color:var(--muted);font-size:1.05rem}.quiz-review{margin-bottom:1.5rem}.quiz-result-answer{font-size:.95rem;margin-top:.75rem;line-height:1.8;color:var(--muted)}@media(max-width:768px){.hero h1{font-size:2.5rem}.section-title{font-size:2rem}.btn{padding:.8rem 2rem;font-size:.95rem}.cta-buttons{flex-direction:column;gap:.5rem}.features-grid,.exam-grid,.stats-grid,.dashboard-grid{grid-template-columns:1fr}nav ul{gap:1rem}.stat-item h2{font-size:2rem}}