:root{color:#2d1f04;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--ink:#2d1f04;--muted:#7a5d1f;--shadow:0 14px 32px #0000000f;--shadow-soft:0 10px 24px #0000000d;background-color:#fffaf0;font-family:DM Sans,Trebuchet MS,Segoe UI,sans-serif;font-weight:400;line-height:1.5}*,:before,:after{box-sizing:border-box}body{background:radial-gradient(circle at 20% 20%,#fff5c7,#0000 25%),radial-gradient(circle at 80% 0,#ffe89c,#0000 20%),#fffaf0;min-height:100vh;margin:0}a{color:inherit}button{font-family:inherit}
.app-shell{width:min(1100px,92vw);color:var(--ink);margin:32px auto 80px}.hero{box-shadow:var(--shadow-soft);background:linear-gradient(135deg,#fff4c2,#ffe89c);border:1px solid #0000000d;border-radius:18px;justify-content:space-between;align-items:center;gap:16px;padding:28px 28px 20px;display:flex}.hero h1{letter-spacing:-.5px;margin:4px 0 8px;font-size:34px}.hero-link{color:inherit;text-decoration:none}.hero-link:hover h1{text-decoration:none}.subtitle{color:var(--muted);max-width:640px;margin:0}.eyebrow{text-transform:uppercase;letter-spacing:.18em;color:var(--muted);margin:0;font-size:12px}.badge{color:#2d1b05;box-shadow:var(--shadow-soft);background:#f8c419;border-radius:12px;align-self:center;padding:10px 16px;font-weight:700}.drill-art{flex:0 0 220px;justify-content:center;display:flex}.drill-art img{filter:drop-shadow(0 12px 22px #0000001f);border-radius:14px;max-width:100%;height:auto}.panel-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px;margin-top:22px;display:grid}.panel{box-shadow:var(--shadow);background:#fffef6;border:1px solid #0000000d;border-radius:16px;padding:18px}.panel-head{justify-content:space-between;align-items:center;gap:12px;display:flex}.panel-head h2{margin:2px 0 4px}.panel-head .muted{margin:0}.preset-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-top:12px;display:grid}.card{background:#fffaf0;border:1px solid #0000000a;border-radius:14px;flex-direction:column;justify-content:space-between;gap:10px;min-height:160px;padding:16px;display:flex}.chip{color:#7a5900;background:#fff1ba;border-radius:999px;margin-bottom:6px;padding:6px 10px;font-size:12px;display:inline-flex}.chip.alt{color:#4c3100;background:#ffe06d}.muted{color:var(--muted)}.muted.small{font-size:13px}a.primary{text-align:center;text-decoration:none;display:inline-block}.primary{color:#271501;cursor:pointer;box-shadow:var(--shadow-soft);background:#f6b800;border:1px solid #e0a100;border-radius:12px;padding:10px 16px;font-weight:700;transition:transform .14s,box-shadow .14s}.primary:disabled{opacity:.55;cursor:not-allowed;box-shadow:none}.primary:hover:enabled{box-shadow:var(--shadow);transform:translateY(-1px)}.ghost{color:var(--ink);cursor:pointer;background:0 0;border:1px solid #0000001a;border-radius:12px;padding:10px 16px;font-weight:700}.wide{width:100%;margin-top:12px}.custom-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-top:12px;display:grid}.picker{cursor:pointer;background:#fffaf0;border:1px dashed #00000026;border-radius:12px;align-items:center;gap:10px;padding:12px;transition:all .15s;display:flex}.picker input{accent-color:#f6b800}.picker.active{box-shadow:var(--shadow-soft);border-color:#f6b800}.picker strong{font-size:15px;display:block}.test-area{box-shadow:var(--shadow);background:#fffef6;border:1px solid #0000000d;border-radius:16px;margin-top:24px;padding:18px}.top-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.stopwatch{letter-spacing:.3px;box-shadow:var(--shadow-soft);background:#ffeeba;border:1px solid #0000000d;border-radius:12px;align-items:center;gap:8px;padding:8px 12px;font-weight:700;display:inline-flex}.dot{background:#df5f00;border-radius:50%;width:10px;height:10px;box-shadow:0 0 0 6px #df5f001f}.status-row{align-items:center;gap:12px;margin-top:10px;display:flex}.counter{background:#fff4c2;border:1px solid #0000000d;border-radius:12px;padding:8px 12px;font-weight:700}.countdown-pill{color:#3d2700;background:#ffe07c;border:1px solid #00000014;border-radius:12px;padding:8px 12px;font-weight:700}.question-card{box-shadow:var(--shadow-soft);background:#fff;border:1px solid #0000000f;border-radius:16px;min-height:190px;margin-top:16px;padding:22px 18px;position:relative}.question-form{flex-direction:column;gap:14px;display:flex}.equation{align-items:center;gap:12px;font-size:30px;font-weight:800;display:inline-flex}.equation input{background:#fffbea;border:1px solid #0000002e;border-radius:12px;width:120px;padding:10px 12px;font-size:22px;font-weight:700}.equation .operand{color:#b07200}.actions{align-items:center;gap:10px;display:flex}.question-card .muted.small{margin:0}.countdown-frosted{color:#d68e00;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#fff0aac7;border-radius:16px;place-items:center;font-size:64px;font-weight:800;display:grid;position:absolute;inset:0}.overlay{color:#fff;mix-blend-mode:multiply;pointer-events:none;border-radius:inherit;background:#0000000f;place-items:center;font-size:120px;font-weight:900;display:grid;position:absolute;inset:0}.question-overlay.correct{color:#1b8f2e}.question-overlay.wrong{color:#d60000}.results{box-shadow:var(--shadow);background:#fffef6;border:1px solid #0000000d;border-radius:16px;margin-top:26px;padding:18px}.results-head{flex-wrap:wrap;justify-content:space-between;gap:18px;display:flex}.summary{background:#fff4c2;border:1px solid #0000000d;border-radius:12px;gap:22px;padding:12px 16px;display:flex}.review{flex-direction:column;gap:10px;margin-top:16px;display:flex}.review-row{background:#fff;border:1px solid #0000000d;border-radius:12px;grid-template-columns:40px 1fr auto;align-items:center;gap:12px;padding:12px 14px;display:grid}.review-text{font-size:20px}.tag{background:#fff1ba;border-radius:10px;place-items:center;width:34px;height:34px;font-weight:700;display:grid}.mark{border-radius:10px;padding:6px 10px;font-weight:700}.mark.yes{color:#1c7c18;background:#d8f5cb}.mark.no{color:#c73400;background:#ffe0d5}.correct{color:#17831d}.wrong{color:#c73400}.results-actions{gap:12px;margin-top:18px;display:flex}.mode-panel{margin-top:22px}.mode-panel-head{grid-template-columns:1fr auto 1fr;align-items:center;margin-bottom:4px;display:grid}.mode-panel-head h2{margin:0}.mode-panel-head .mode-toggle{justify-self:center}.mode-toggle{background:#f0ece0;border-radius:10px;gap:2px;padding:3px;display:flex}.mode-toggle button{cursor:pointer;color:var(--muted);background:0 0;border:none;border-radius:7px;flex:1;padding:5px 8px;font-size:13px;font-weight:600;transition:all .15s}.mode-toggle button.active{color:var(--ink);box-shadow:var(--shadow-soft);background:#fff}.stamina-timer{letter-spacing:.3px;box-shadow:var(--shadow-soft);background:#d0f0d5;border:1px solid #00000014;border-radius:12px;align-items:center;gap:8px;padding:8px 12px;font-weight:700;transition:background .3s,border-color .3s;display:inline-flex}.stamina-timer .dot{background:#1a9a2e;box-shadow:0 0 0 6px #1a9a2e1f}.stamina-timer.urgent{background:#ffe0d5;border-color:#c7340033}.stamina-timer.urgent .dot{background:#c73400;box-shadow:0 0 0 6px #c7340026}@keyframes bonusTimerFlash{0%{background:#d0f0d5;transform:scale(1)}20%{background:#52e06a;transform:scale(1.08)}60%{background:#8ef59f;transform:scale(1.04)}to{background:#d0f0d5;transform:scale(1)}}@keyframes bonusPop{0%{opacity:1;transform:translateY(0)scale(1)}60%{opacity:1;transform:translateY(-22px)scale(1.1)}to{opacity:0;transform:translateY(-36px)scale(.9)}}.stamina-timer.bonus-flash{animation:.9s ease-out forwards bonusTimerFlash}.bonus-pop{color:#0f6e1e;pointer-events:none;white-space:nowrap;font-size:13px;font-weight:800;animation:.9s ease-out forwards bonusPop;position:absolute;top:-4px;right:-4px}.stamina-info-pill{color:#1a5c22;background:#d0f0d5;border:1px solid #00000014;border-radius:12px;align-items:center;gap:8px;padding:8px 12px;font-size:14px;font-weight:600;display:inline-flex}.stamina-info-pill .sep{color:#7ab87e}.review-text .operand.muted{color:var(--muted)}@media (max-width:680px){.equation{flex-wrap:wrap;font-size:26px}.equation input{width:100px}.actions{flex-direction:column;align-items:flex-start}.review-row{grid-template-columns:34px 1fr}.mark{justify-self:start}}