:root{color-scheme:dark;--bg:#10121b;--surface:#191c29;--raised:#242837;--text:#fafaff;--muted:#bac0d1;--line:#363b50;--accent:#c3b4ff;--tint:#363049;--good:#a4e3ce;--good-bg:#233e38;--bad:#ffb4b4;--bad-bg:#432c35}:root[data-theme=light]{color-scheme:light;--bg:#f4f2f8;--surface:white;--raised:#f0eef6;--text:#20202b;--muted:#5c5c70;--line:#d6d4e2;--accent:#6946ad;--tint:#ece4fc;--good:#216750;--good-bg:#e4f3eb;--bad:#a52841;--bad-bg:#fce8ed}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,sans-serif}a{color:inherit;text-underline-offset:4px}.wrap{width:min(1120px,calc(100% - 32px));margin:auto}header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}.brand{font-size:14px;letter-spacing:1px;font-weight:800;text-decoration:none}nav{display:flex;align-items:center;gap:12px;flex-wrap:wrap}nav a{font-size:14px;text-decoration:none}button,input,select,.button{font:inherit;color:var(--text);background:var(--raised);border:1px solid var(--line);border-radius:10px;padding:10px 14px;min-height:44px}button,select{cursor:pointer}button:hover,.button:hover{border-color:var(--accent)}button:disabled{cursor:default;opacity:.8}.button{display:inline-block;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.hero{padding:30px 0}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--accent);font-weight:700}h1{font-size:clamp(29px,5vw,43px);line-height:1.2;margin:12px 0}h2{margin:0 0 10px;font-size:22px}p{margin:10px 0}.muted{font-size:14px;color:var(--muted)}.activities{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:5px;margin-bottom:20px}.activities button{background:transparent;border:0;font-weight:650}.activities [aria-pressed=true]{background:var(--tint);color:var(--accent)}.layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px;align-items:start}.panel{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px;margin-bottom:20px;min-width:0}.compact{padding:18px}.compact h2{font-size:18px}.line{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px}.badge{padding:4px 9px;border-radius:6px;background:var(--tint);color:var(--accent);font-weight:700}progress{appearance:none;width:100%;height:6px;border:0;margin:20px 0;background:var(--raised);border-radius:4px}progress::-webkit-progress-bar{background:var(--raised)}progress::-webkit-progress-value{background:var(--accent)}progress::-moz-progress-bar{background:var(--accent)}.prompt{font-size:clamp(26px,4vw,38px);line-height:1.5;overflow-wrap:anywhere;margin:16px 0}.choices{display:grid;gap:10px;margin:22px 0}.choices button{text-align:left;white-space:normal;overflow-wrap:anywhere;min-height:54px}.correct{border-color:var(--good)!important;background:var(--good-bg)!important}.wrong{border-color:var(--bad)!important;background:var(--bad-bg)!important}.feedback{font-weight:650;border-radius:10px;padding:13px;margin:18px 0}#reveal{padding:15px;border:1px solid var(--line);border-radius:12px;margin:15px 0}#reading{font-size:20px}.controls{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.primary{border-color:var(--accent);background:var(--tint)}.small{font-size:13px;padding:7px 11px}.write-row{display:flex;gap:8px;margin:8px 0}input{min-width:0}.write-row input{flex:1}#search{width:100%;margin:15px 0}.library-item{padding:16px 0;border-bottom:1px solid var(--line)}.library-item h3{font-size:22px;margin:0}.library-item:last-child{border-bottom:0}.library-item .line{justify-content:flex-start;flex-wrap:wrap}.match-board{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}.match-column{display:grid;gap:10px}.match-column button{min-height:66px;white-space:normal;overflow-wrap:anywhere}.selected{outline:3px solid var(--accent);outline-offset:1px}.matched{background:var(--good-bg);border-color:var(--good)}summary{cursor:pointer;font-weight:650}aside label{display:block;margin:15px 0;font-size:14px}aside select{display:block;width:100%;margin-top:5px}.check{display:flex;gap:10px;align-items:center}.check input{min-height:0;width:18px;height:18px}aside .button,aside button{margin-top:8px}.today{font-size:20px;font-weight:700}.notice{display:flex;gap:15px;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--raised);border:1px solid var(--line);border-radius:12px;position:relative;overflow:hidden;margin-bottom:20px}.timer{height:3px;position:absolute;bottom:0;left:0;background:var(--accent);width:100%;transform-origin:left;animation:timer 6s linear}@keyframes timer{to{transform:scaleX(0)}}footer{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:25px 0;color:var(--muted);font-size:13px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip-link{position:absolute;left:12px;top:-100px;padding:10px;background:var(--surface);z-index:5}.skip-link:focus{top:8px}@media(max-width:800px){.layout{grid-template-columns:1fr}header{align-items:flex-start;flex-direction:column;gap:12px}aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}aside .panel{margin:0}aside>section:last-child{grid-column:1/-1}}@media(max-width:480px){.wrap{width:calc(100% - 24px)}.panel{padding:18px 14px}.activities{grid-template-columns:1fr 1fr}.activities button{font-size:14px}nav{gap:9px}nav a{font-size:13px}.write-row{flex-direction:column}aside{display:block}aside .panel{margin-bottom:15px}.match-board{gap:8px}.match-column button{padding:9px;font-size:15px}}@media(prefers-reduced-motion:reduce){.timer{animation:none}}