@import "https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=Space+Mono:wght@400;700&family=DM+Sans:wght@300;400;500;600&display=swap";:root{--bg:#05101f;--bg2:#0e1c34;--bg3:#122145;--card:#11213a;--card2:#1d2f56;--border:#4e79bf59;--accent:#22d3ee;--accent2:#a855f7;--accent3:#38bdf8;--danger:#fb7185;--success:#34d399;--warning:#fbbf24;--text:#eef8ff;--text2:#9fc7ff;--text3:#7a9fcb;--radius:12px;--radius-lg:18px;--shadow:0 4px 24px #00000059;--shadow-lg:0 8px 48px #00000073;--font:"Sora", sans-serif;--mono:"Space Mono", monospace;--body:"DM Sans", sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{background:var(--bg);color:var(--text);font-family:var(--body);-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg2)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--accent)}@keyframes fadeIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes glow{0%,to{box-shadow:0 0 12px #4f8ef74d}50%{box-shadow:0 0 24px #4f8ef799}}@keyframes countDown{0%{color:var(--text)}to{color:var(--danger)}}.fade-in{animation:.4s forwards fadeIn}.slide-in{animation:.3s forwards slideIn}.btn{border-radius:var(--radius);cursor:pointer;font-family:var(--font);white-space:nowrap;border:none;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:#3a7af0;transform:translateY(-1px);box-shadow:0 4px 16px #4f8ef766}.btn-secondary{background:var(--card2);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg3);border-color:var(--accent)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:#16a34a}.btn-ghost{color:var(--text2);border:1px solid var(--border);background:0 0}.btn-ghost:hover:not(:disabled){background:var(--card);color:var(--text)}.btn-sm{padding:6px 14px;font-size:12px}.btn-lg{padding:14px 28px;font-size:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:24px}.input{background:var(--bg2);border:1px solid var(--border);width:100%;color:var(--text);border-radius:var(--radius);font-family:var(--body);outline:none;padding:12px 16px;font-size:14px;transition:border-color .2s,box-shadow .2s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #4f8ef726}.input::placeholder{color:var(--text3)}.label{color:var(--text2);letter-spacing:.05em;text-transform:uppercase;margin-bottom:6px;font-size:12px;font-weight:600;display:block}.badge{letter-spacing:.05em;border-radius:20px;align-items:center;gap:4px;padding:3px 10px;font-size:11px;font-weight:600;display:inline-flex}.badge-blue{color:var(--accent);background:#4f8ef726;border:1px solid #4f8ef74d}.badge-green{color:var(--success);background:#22c55e26;border:1px solid #22c55e4d}.badge-orange{color:var(--accent3);background:#f9731626;border:1px solid #f973164d}.badge-red{color:var(--danger);background:#ef444426;border:1px solid #ef44444d}.badge-gray{color:var(--text2);border:1px solid var(--border);background:#8b9cc81a}.divider{background:var(--border);height:1px;margin:20px 0}.spinner{border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:20px;height:20px;animation:.7s linear infinite spin}.error-msg{color:var(--danger);margin-top:6px;font-size:13px}.success-msg{color:var(--success);margin-top:6px;font-size:13px}.mesh-bg{z-index:0;pointer-events:none;background-image:linear-gradient(#22d3ee14 1px,#0000 1px),linear-gradient(90deg,#a855f714 1px,#0000 1px);background-size:48px 48px;position:fixed;inset:0}.toast-container{z-index:9999;flex-direction:column;gap:10px;display:flex;position:fixed;top:24px;right:24px}.toast{border-radius:var(--radius);background:var(--card2);border:1px solid var(--border);box-shadow:var(--shadow-lg);align-items:center;gap:10px;max-width:360px;padding:14px 20px;font-size:14px;font-weight:500;animation:.3s slideIn;display:flex}.toast-success{border-left:3px solid var(--success)}.toast-error{border-left:3px solid var(--danger)}.toast-warning{border-left:3px solid var(--warning)}.toast-info{border-left:3px solid var(--accent)}.modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#000000b3;justify-content:center;align-items:center;padding:20px;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:520px;max-height:90vh;box-shadow:var(--shadow-lg);padding:32px;animation:.3s fadeIn;overflow-y:auto}.modal-lg{max-width:800px}.header{z-index:100;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#0a0e1ae6;justify-content:space-between;align-items:center;height:64px;padding:0 32px;display:flex;position:sticky;top:0}.header-logo{font-family:var(--font);background:linear-gradient(135deg, var(--accent), var(--accent2));-webkit-text-fill-color:transparent;letter-spacing:-.02em;-webkit-background-clip:text;font-size:20px;font-weight:800}.avatar{background:linear-gradient(135deg, var(--accent), var(--accent2));width:40px;height:40px;font-family:var(--font);cursor:pointer;border:2px solid var(--border);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:14px;font-weight:700;transition:border-color .2s;display:flex;overflow:hidden}.avatar:hover{border-color:var(--accent)}.avatar img{object-fit:cover;width:100%;height:100%}.dropdown{position:relative}.dropdown-menu{background:var(--card2);border:1px solid var(--border);border-radius:var(--radius);min-width:200px;box-shadow:var(--shadow-lg);animation:.2s fadeIn;position:absolute;top:52px;right:0;overflow:hidden}.dropdown-item{cursor:pointer;align-items:center;gap:12px;padding:12px 16px;font-size:14px;font-weight:500;transition:background .15s;display:flex}.dropdown-item:hover{background:var(--card)}.dropdown-item.danger{color:var(--danger)}.dropdown-divider{background:var(--border);height:1px}.paper-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;padding:24px;transition:all .25s;position:relative;overflow:hidden}.paper-card:before{content:"";background:linear-gradient(90deg, var(--accent), var(--accent2));opacity:0;height:3px;transition:opacity .25s;position:absolute;top:0;left:0;right:0}.paper-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 8px 32px #4f8ef733}.paper-card:hover:before{opacity:1}.timer{font-family:var(--mono);border-radius:var(--radius);background:var(--card2);border:1px solid var(--border);letter-spacing:.1em;padding:8px 20px;font-size:28px;font-weight:700}.timer.warning{color:var(--warning);border-color:var(--warning);animation:1s ease-in-out infinite glow}.timer.danger{color:var(--danger);border-color:var(--danger)}.question-row{border:1px solid var(--border);border-radius:var(--radius);background:var(--card);grid-template-columns:48px 1fr auto;align-items:center;gap:16px;padding:16px 20px;transition:background .15s;display:grid}.question-row:hover{background:var(--card2)}.question-row.answered{border-left:3px solid var(--accent2)}.question-row.not-sure-row{border-left:3px solid var(--warning)}.mcq-options{flex-wrap:wrap;gap:8px;display:flex}.mcq-radio{border:2px solid var(--border);cursor:pointer;width:36px;height:36px;font-family:var(--mono);color:var(--text2);background:var(--bg2);border-radius:50%;justify-content:center;align-items:center;font-size:13px;font-weight:700;transition:all .15s;display:flex}.mcq-radio:hover{border-color:var(--accent);color:var(--accent)}.mcq-radio.selected{background:var(--accent);border-color:var(--accent);color:#fff}.mcq-radio input{display:none}.result-row{border:1px solid var(--border);border-radius:var(--radius);grid-template-columns:48px 48px 1fr auto;align-items:center;gap:16px;padding:12px 20px;font-size:14px;display:grid}.result-row.correct{border-left:3px solid var(--success)}.result-row.wrong{border-left:3px solid var(--danger)}.score-circle{border:6px solid var(--accent);background:var(--card2);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:160px;height:160px;display:flex;box-shadow:0 0 40px #4f8ef74d}.sidebar{background:var(--card);border-right:1px solid var(--border);z-index:50;flex-direction:column;width:240px;height:100vh;padding:24px 0;display:flex;position:fixed;top:0;left:0}.sidebar-item{cursor:pointer;color:var(--text2);border-left:3px solid #0000;align-items:center;gap:12px;padding:12px 24px;font-size:14px;font-weight:500;transition:all .15s;display:flex}.sidebar-item:hover,.sidebar-item.active{background:var(--bg3);color:var(--text);border-left-color:var(--accent)}.check-wrap{cursor:pointer;align-items:center;gap:8px;display:flex}.check-wrap input[type=checkbox]{width:16px;height:16px;accent-color:var(--warning);cursor:pointer}.select{background:var(--bg2);border:1px solid var(--border);width:100%;color:var(--text);border-radius:var(--radius);font-family:var(--body);outline:none;padding:12px 16px;font-size:14px;transition:border-color .2s}.select:focus{border-color:var(--accent)}.select option{background:var(--bg2)}.progress-bar{background:var(--border);border-radius:2px;height:4px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--accent), var(--accent2));height:100%;transition:width .3s}.table{border-collapse:collapse;width:100%;font-size:14px}.table th{text-align:left;text-transform:uppercase;letter-spacing:.05em;color:var(--text2);border-bottom:1px solid var(--border);padding:12px 16px;font-size:11px;font-weight:600}.table td{border-bottom:1px solid #2a3a5580;padding:12px 16px}.table tr:hover td{background:var(--card2)}.page{max-width:1200px;min-height:100vh;margin:0 auto;padding:32px;animation:.4s fadeIn}.page-header{margin-bottom:32px}.page-title{font-family:var(--font);letter-spacing:-.03em;font-size:34px;font-weight:800;line-height:1.05}.page-subtitle{color:var(--text2);max-width:640px;margin-top:10px;font-size:15px}.home-hero{border-radius:var(--radius-lg);background:linear-gradient(135deg,#22d3ee24,#a855f71f);border:1px solid #a855f738;grid-template-columns:1fr auto;gap:24px;padding:28px;display:grid}.hero-badge{color:var(--accent);letter-spacing:.05em;background:#22d3ee1f;border-radius:999px;justify-content:center;align-items:center;margin-bottom:14px;padding:8px 16px;font-size:12px;font-weight:700;display:inline-flex}.hero-summary{justify-content:end;gap:12px;display:grid}.hero-card{border-radius:var(--radius);background:#ffffff0d;border:1px solid #ffffff14;flex-direction:column;gap:6px;min-width:150px;padding:18px 20px;display:flex}.hero-card strong{color:#fff;font-size:24px}.hero-card span{color:var(--text2);font-size:13px}@media (width<=768px){.header{padding:0 16px}.page{padding:16px}.page-title{font-size:28px}.page-subtitle{font-size:14px}.home-hero{grid-template-columns:1fr;padding:20px}.hero-summary{justify-content:stretch}.hero-card{min-width:auto}.question-row{grid-template-columns:36px 1fr}.mcq-options{gap:6px}.mcq-radio{width:32px;height:32px;font-size:12px}}