:root{font-family:system-ui,-apple-system,"Segoe UI","PingFang SC",sans-serif;color:#173b50;background:#e8f4f1}*{box-sizing:border-box}body{margin:0;background:linear-gradient(142deg,#e4f6ef,#f8fbfd 58%,#fff4e5);min-height:100vh}button,select,input,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}[hidden]{display:none!important}.app{max-width:740px;margin:auto;padding:calc(env(safe-area-inset-top) + 12px) 12px calc(env(safe-area-inset-bottom) + 20px)}.mast{display:flex;gap:11px;align-items:center;margin-bottom:12px}.mark{height:53px;min-width:53px;display:grid;place-items:center;border-radius:18px;font-size:31px;color:white;background:linear-gradient(135deg,#174257,#069882);box-shadow:0 4px 18px #116b7224}.eyebrow{font-size:10px;letter-spacing:2px;color:#588490;font-weight:800}.mast h1{font-size:clamp(19px,4.6vw,26px);margin:3px 0;letter-spacing:-.6px}.mast p{margin:0;color:#64818b;font-size:13px}.level-nav{display:flex;gap:8px;overflow-x:auto;scrollbar-width:thin;margin-bottom:11px}.level-nav a,.level-nav span{white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;padding:11px 15px;border:1px solid #c6dcdf;border-radius:12px;text-decoration:none;color:#476b78;background:white;font-size:13px;font-weight:800}.level-nav .active{background:linear-gradient(135deg,#163d54,#007b74);border-color:#0d6567;color:white}.level-nav .soon{opacity:.65}.panel{background:#fff;border:1px solid #dce8e9;border-radius:21px;padding:15px;margin-bottom:11px;box-shadow:0 8px 25px #173b5010}.panel-head,.stat{display:flex;align-items:center;justify-content:space-between;gap:7px;color:#668791;font-size:11px;font-weight:800;letter-spacing:1.3px}.pill,.counter{background:#e7f4ef;color:#126f60;border-radius:30px;padding:6px 12px;letter-spacing:normal;font-size:12px}.segmented{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin:13px 0}.segmented button{border:1px solid #d3e1e4;border-radius:13px;padding:11px 4px;background:#f6fafb;color:#4e7281;font-size:12px;font-weight:750}.segmented button.selected{background:linear-gradient(135deg,#00937b,#157783);color:#fff;border-color:transparent}.selectors{display:grid;grid-template-columns:1fr 1fr;gap:9px}.selectors label,.field-label{display:block;color:#587986;font-size:13px;font-weight:750}.selectors select,.field-label select{display:block;width:100%;margin-top:5px;border:1px solid #c9dee1;border-radius:11px;padding:10px 8px;color:#173b50;background:#f9fdfd;font-size:12px;font-weight:750;min-width:0}.course-label{font-size:14px;font-weight:850;margin-top:11px}.subtle{font-size:11px;color:#7e98a1;line-height:1.6;margin:7px 0 0}.progress{background:#e8f0f1;border-radius:50px;height:8px;margin:12px 0 8px;overflow:hidden}.progress div{background:linear-gradient(90deg,#22ac86,#0c697f);border-radius:50px;height:100%;width:0;transition:width .25s}.score{color:#4e7681;font-size:12px;font-weight:750;margin:8px 0 10px}.hanzi-area{min-height:245px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:15px;background:linear-gradient(135deg,#fafdfc,#fff8ec);border:1px solid #e3efed;border-radius:17px;cursor:pointer;margin:12px 0}.huge{font-size:clamp(74px,22vw,132px);color:#0b1925;line-height:1.35;text-align:center;overflow-wrap:anywhere;padding:8px;font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Noto Sans CJK SC',sans-serif}.tap-hint{font-size:11px;color:#98aab0}.reveal{text-align:center;border-radius:13px;background:#e6f6f2;padding:10px;font-size:18px;color:#163f51}.reveal div:first-child{font-size:21px;font-weight:750}.reveal div+div{font-size:15px;margin-top:5px}.btn-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:9px}.btn{border:1px solid transparent;border-radius:13px;padding:12px 7px;font-weight:850;font-size:13px;line-height:1.25}.outline,.secondary{border-color:#bdd8da;background:white;color:#1c5971}.primary{color:white;background:linear-gradient(120deg,#16455a,#098777)}.positive{background:#14886d;color:white}.warning{border-color:#efc18d;background:#fffaf4;color:#a56423}.full{width:100%;margin-top:11px}.message{font-size:13px;font-weight:700;color:#34756b;min-height:14px;line-height:1.5}.prompt-head{font-size:10px;font-weight:850;color:#78949d;letter-spacing:1.1px;margin:11px 0 6px}.vietnamese{background:linear-gradient(145deg,#f1faf7,#fff6e9);padding:15px 13px;border:1px solid #e1ede7;border-radius:15px;font-size:clamp(18px,4.5vw,24px);font-weight:700;line-height:1.7;white-space:pre-wrap}.cloze{padding:15px;text-align:center;font-size:clamp(26px,6vw,35px);background:#eef7f7;border-radius:13px;margin:11px 0;line-height:1.6;overflow-wrap:anywhere}.work input,.work textarea{border:2px solid #c7dfe0;border-radius:13px;padding:12px 13px;width:100%;font-size:21px;color:#174157;background:white;outline:0}.work input:focus,.work textarea:focus{border-color:#108f80}.work textarea{min-height:160px;resize:vertical;line-height:1.7;font-size:18px}details{margin:12px 0;color:#63808b;font-size:12px}summary{cursor:pointer;text-decoration:underline;text-underline-offset:3px}.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:9px}.chips button{background:#ecf7f5;border:1px solid #d2e8e2;border-radius:9px;padding:8px 12px;font-size:19px;color:#164050}.answer,.hint{background:#f2faf8;border:1px solid #cde9df;padding:13px;border-radius:13px;margin-top:13px;color:#214c5d;font-size:15px;line-height:1.7;white-space:pre-wrap}.answer #sentence-zh,.answer #passage-target{font-size:19px;font-weight:750;line-height:1.7}.answer #sentence-key{color:#72939d;font-size:13px}.passage-text{font-size:19px;font-weight:650}.footer{text-align:center;color:#7d9aa4;margin-top:18px;font-size:11px;line-height:1.6}.footer>div{letter-spacing:2px;font-size:10px;font-weight:800}.footer p{margin:6px 0 1px}.footer strong{color:#1d596c}.footer small{font-size:10px}@media(max-width:360px){.btn{font-size:11px;padding:11px 4px}.app{padding-left:9px;padding-right:9px}.segmented button{font-size:10px}.panel{padding:12px}.selectors select{font-size:11px}}

.word-auto-wrap{margin-top:12px;padding-top:12px;border-top:1px solid #e4eded}.auto-pronounce-row{display:flex;align-items:center;gap:10px;font-size:12px;color:#6a8792;margin:6px 0 10px}.auto-pronounce-row input{width:22px;height:22px;margin:0}.auto-mini{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.auto-mini label{font-size:13px;font-weight:750;color:#587986}.auto-mini select{border:1px solid #c9dee1;border-radius:11px;padding:10px 8px;color:#173b50;background:#f9fdfd;font-size:12px;font-weight:750;min-width:120px}.auto-toggle{min-width:150px}.auto-notice{text-align:center}.auto-skipnote{font-size:11px;color:#7b97a0;line-height:1.5;margin-top:6px}@media(max-width:460px){.auto-mini{display:grid;grid-template-columns:1fr;align-items:stretch}.auto-mini select,.auto-toggle{width:100%;min-width:0}}

/* v2.1: lesson is already shown in the selector. */
.course-label[hidden]{display:none!important;}

.reverse-hsk-switch{display:flex;flex-direction:column;gap:6px;margin:15px 0 5px;color:#587986;font-size:12px;font-weight:800}.reverse-hsk-switch select{background:#f9fdfd;color:#173b50;border:1px solid #c9dee1;border-radius:10px;padding:10px;font-size:12px}