:root{--ink:#182c46;--paper:#f5f8fc;--surface:#ffffff;--primary:#245bd6;--muted:#56677e;--line:#dce5f1;--success:#146549;--error:#a83242;--soft-blue:#eaf0ff;--soft-green:#eaf6ef;--soft-red:#fff0f1;--radius-card:24px;--radius-control:14px;--body:Arial,sans-serif;--display:Georgia,serif;--scrollbar-thumb:#8b9bb1;--scrollbar-track:#edf1f7;--scrollbar-hover:#56677e;--scrollbar-active:#245bd6;color-scheme:light;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track);scrollbar-width:thin}
*{box-sizing:border-box}html{scrollbar-gutter:stable}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 var(--body);-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button:disabled{cursor:default;opacity:.6}a{color:var(--primary);text-underline-offset:4px}button,a{touch-action:manipulation}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--primary);outline-offset:4px}button:active:not(:disabled){transform:translateY(1px)}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1{font:400 clamp(32px,4.2vw,46px)/1.15 var(--display);letter-spacing:-1.2px}h2{font:400 30px/1.2 var(--display);letter-spacing:-.5px}h3{font-size:16px;line-height:1.4}small{font-size:13px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border:2px solid var(--scrollbar-track);border-radius:6px}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-hover)}::-webkit-scrollbar-thumb:active{background:var(--scrollbar-active)}.shell{max-width:1128px;margin:auto;padding:0 28px}.header{min-height:112px;display:flex;align-items:center;gap:38px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-size:29px;font-weight:bold;line-height:1}.brand small{display:block;color:var(--muted);font-size:11px;font-weight:normal;letter-spacing:.5px;margin-top:8px}.brand-icon{position:relative;display:grid;place-items:center;background:var(--primary);color:white;font:38px var(--display);width:52px;height:52px;border-radius:16px}.brand-icon span{position:absolute;right:3px;top:1px;font:24px var(--body);color:#ffdb8e;transform:rotate(-13deg)}.header-note{font-size:12px;line-height:1.5;color:var(--muted);padding-left:28px;border-left:1px solid var(--line)}.platform{margin-left:auto;font-size:12px;display:flex;align-items:center;gap:8px;color:var(--muted)}.status-dot{width:7px;height:7px;background:var(--success);border-radius:50%}.navigation{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:36px}.navigation button{border:0;background:none;min-height:52px;padding:12px 25px;border-bottom:3px solid transparent;color:var(--muted);font-size:14px;font-weight:bold}.navigation button span{margin-right:6px;font-size:18px}.navigation button[aria-current]{border-bottom-color:var(--primary);color:var(--primary)}.navigation button:hover{background:var(--soft-blue);color:var(--primary)}main{min-height:540px;outline:none}.intro{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:28px;gap:20px}.eyebrow{font-size:11px;letter-spacing:1.8px;font-weight:bold;text-transform:uppercase;color:var(--muted);margin-bottom:12px}.intro p{color:var(--muted);margin-top:12px;max-width:540px}.date{font-size:12px;color:var(--muted);white-space:nowrap;padding-bottom:4px}.layout{display:grid;grid-template-columns:minmax(0,1.85fr) minmax(260px,1fr);gap:24px;align-items:start}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:30px}.practice-card{box-shadow:0 8px 32px #182c4605;position:relative;overflow:hidden}.card-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.pill{font-size:11px;letter-spacing:.4px;font-weight:bold;color:var(--primary);background:var(--soft-blue);border-radius:7px;padding:5px 9px}.subtle{font-size:13px;color:var(--muted)}.steps{display:flex;gap:6px;margin:20px 0 28px}.step{height:5px;border-radius:4px;background:var(--line);flex:1}.step.good{background:var(--success)}.step.bad{background:var(--error)}.step.active{background:var(--primary)}.daily-hero{display:flex;gap:20px;align-items:center;padding:4px 0 26px}.letter-art{min-width:125px;position:relative;height:142px;display:grid;place-items:center;font:116px/1 var(--display);color:var(--primary);background:repeating-linear-gradient(transparent 0,transparent 27px,var(--line) 28px,transparent 29px)}.letter-art:after{content:'✓';position:absolute;top:5px;right:0;color:var(--error);font:42px var(--display);transform:rotate(-14deg)}.daily-hero h2{margin-bottom:10px;font-size:33px}.daily-hero p{color:var(--muted);font-size:14px;line-height:1.6}.topics{display:flex;flex-wrap:wrap;gap:7px;margin:3px 0 25px}.topic{background:var(--paper);border:1px solid var(--line);border-radius:30px;padding:5px 11px;color:var(--muted);font-size:11px}.primary,.secondary{min-height:50px;border-radius:var(--radius-control);padding:12px 20px;border:1px solid transparent;font-size:14px;font-weight:bold;display:inline-flex;align-items:center;justify-content:center;gap:14px;text-decoration:none}.primary{background:var(--primary);color:white}.primary:hover:not(:disabled){background:#1b49b1}.secondary{background:var(--surface);border-color:var(--line);color:var(--ink)}.secondary:hover{background:var(--paper);border-color:var(--muted)}.full{width:100%}.button-row{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}.footnote{text-align:center;font-size:11px;color:var(--muted);margin-top:13px}.aside{display:grid;gap:18px}.aside .card{padding:24px}.mini-title{display:flex;align-items:center;gap:9px;margin-bottom:18px}.mini-icon{display:grid;place-items:center;width:30px;height:30px;background:var(--soft-blue);border-radius:9px;color:var(--primary);font-size:18px}.statline{display:flex;gap:28px}.statline strong{font-size:28px;line-height:1.25;font-weight:normal;display:block;font-variant-numeric:tabular-nums}.statline small{color:var(--muted);font-size:11px}.aside p{font-size:13px;color:var(--muted);line-height:1.65}.note-card{background:#eef3fc;border-color:#e2eafa}.note-card h3{margin-bottom:9px}.note-rule{height:1px;background:var(--line);margin:18px 0}.note-source{font-size:11px;color:var(--muted)}.question-title{font:400 28px/1.35 var(--display);margin:24px 0}.question-word{font:38px/1.25 var(--display);text-align:center;border-radius:14px;background:var(--paper);padding:20px;margin:-4px 0 22px}.options{display:grid;gap:10px}.option{width:100%;text-align:left;padding:16px;border:1px solid var(--line);border-radius:var(--radius-control);background:var(--surface);display:flex;align-items:center;gap:14px;font-size:17px;min-height:62px}.option:hover:not(:disabled){border-color:var(--primary);background:var(--soft-blue)}.option[aria-pressed=true]{background:var(--soft-blue);border:2px solid var(--primary);padding:15px}.option .option-letter{width:27px;height:27px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;font-size:11px;color:var(--muted);flex-shrink:0}.option.correct{background:var(--soft-green);border-color:var(--success);color:var(--success);opacity:1}.option.incorrect{background:var(--soft-red);border-color:var(--error);color:var(--error);opacity:1}.option:disabled{opacity:.8}.feedback{margin-top:22px;padding:20px;border-radius:var(--radius-control);background:var(--soft-green);border-left:3px solid var(--success)}.feedback.wrong{background:var(--soft-red);border-left-color:var(--error)}.feedback h3{margin-bottom:8px}.feedback p{font-size:14px;line-height:1.6}.feedback small{display:block;color:var(--muted);margin-top:10px;font-size:11px}.question-actions{margin-top:22px}.text-button{background:transparent;border:0;padding:10px 0;min-height:44px;font-size:13px;color:var(--primary);text-decoration:underline;text-underline-offset:4px}.notice{padding:16px 20px;background:var(--soft-red);border:1px solid #edc2c9;border-radius:14px;margin-bottom:24px;font-size:14px}.notice button{border:0;background:none;text-decoration:underline;color:var(--error);font-weight:bold;min-height:32px;margin-left:12px}.demo-note{background:var(--soft-blue);border-radius:12px;padding:12px 16px;font-size:12px;line-height:1.6;color:var(--ink);margin-bottom:22px}.progress-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:26px}.metric strong{display:block;font:40px/1.2 var(--display);margin-bottom:7px}.metric span{font-size:13px;color:var(--muted)}.section-title{margin:28px 0 18px}.topic-row{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:20px 0 8px;font-size:14px}.meter{height:6px;border-radius:4px;background:var(--line);overflow:hidden}.meter div{height:100%;background:var(--primary)}.empty{padding:22px 0;color:var(--muted);font-size:14px}.mistake{border-top:1px solid var(--line);padding:20px 0}.mistake:last-child{padding-bottom:0}.mistake summary{cursor:pointer;font-weight:bold;font-size:15px;min-height:44px}.mistake p{font-size:14px;margin-top:8px;color:var(--muted)}.mistake .correct-label{color:var(--success);font-weight:bold}.about-copy p{margin:14px 0;color:var(--muted);font-size:14px}.about-copy h2{margin-top:26px;font-size:25px}.about-copy h2:first-child{margin-top:0}.about-copy ul{padding-left:22px;color:var(--muted);font-size:14px}.about-copy li{margin-bottom:8px}.source-links{display:grid;gap:10px;margin-top:20px;font-size:13px}.complete{text-align:center;padding:24px 0 12px}.complete-symbol{width:70px;height:70px;margin:0 auto 20px;background:var(--soft-green);color:var(--success);border-radius:50%;display:grid;place-items:center;font-size:36px}.complete p{color:var(--muted);font-size:14px;margin:14px 0}.result-number{font:52px/1.2 var(--display);margin:20px 0 6px}.loading{min-height:340px;display:flex;align-items:center;justify-content:center;gap:12px;color:var(--muted);font-size:14px}.spinner{width:20px;height:20px;border:2px solid var(--line);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}footer{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:42px;padding:20px 0 30px;color:var(--muted);font-size:11px}footer button{background:none;border:0;color:var(--muted);font-size:11px;min-height:44px;text-decoration:underline;text-underline-offset:4px}.skip-link{position:absolute;top:-100px}.skip-link:focus{top:8px;left:8px;padding:12px;background:white;z-index:5}.error-screen{padding:50px 20px;text-align:center}.error-screen p{margin:20px 0;color:var(--muted)}
@media(max-width:720px){.shell{padding:0 20px}.header{min-height:90px;gap:14px}.brand{font-size:25px}.brand-icon{width:46px;height:46px;font-size:33px}.brand small{font-size:10px}.header-note{display:none}.platform{font-size:10px;max-width:105px}.navigation{margin-bottom:28px;justify-content:space-between}.navigation button{padding:10px 12px;font-size:13px;flex:1}.navigation button span{font-size:16px}.intro{display:block;margin-bottom:22px}.date{display:none}.intro p{font-size:14px;max-width:320px}.layout{grid-template-columns:1fr;gap:20px}.card{padding:23px;border-radius:20px}.daily-hero{gap:18px}.daily-hero h2{font-size:28px}.letter-art{min-width:85px;font-size:89px;height:118px}.daily-hero p{font-size:13px}.aside{grid-template-columns:1fr}.aside .card{padding:22px}.progress-grid{gap:8px}.metric{padding:18px 12px}.metric strong{font-size:32px}.metric span{font-size:11px}.question-title{font-size:25px}.question-word{font-size:32px}.option{font-size:16px}footer{margin-top:30px;flex-direction:column;align-items:flex-start;gap:3px;padding-bottom:calc(20px + env(safe-area-inset-bottom))}.eyebrow{font-size:10px}.topics{gap:5px}.topic{font-size:10px;padding:5px 9px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;scroll-behavior:auto!important;transition:none!important}}
@media(forced-colors:active){:root{scrollbar-color:auto}.option[aria-pressed=true]{outline:2px solid Highlight}.step{border:1px solid CanvasText}.step.good,.step.bad{background:Highlight}}

.primary + .secondary {margin-top:10px} .navigation button {white-space:nowrap} @media(max-width:420px){.navigation button{padding-inline:8px}.navigation button span{margin-right:3px}}

.exam-context { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.7; margin: 20px 0; font-size: 16px; }
.answer-label { display: block; font-weight: 600; margin-top: 20px; }
.written-answer { box-sizing: border-box; width: 100%; padding: 14px; font: inherit; border: 1px solid #8a9094; border-radius: 10px; background: #fff; color: #172d32; }
.written-answer:focus-visible { outline: 3px solid #266c63; outline-offset: 3px; }