:root{font-family:system-ui,-apple-system,"Segoe UI","PingFang SC",sans-serif;color:#173b50;background:#eaf4f1}*{box-sizing:border-box}html,body{min-width:260px;margin:0}body{background:linear-gradient(145deg,#e7f6f0,#f6fafc 57%,#fff5e9);min-height:100vh}button,select{font:inherit}button{cursor:pointer}[hidden]{display:none!important}.app{max-width:780px;margin:0 auto;padding:calc(env(safe-area-inset-top) + 14px) 12px calc(env(safe-area-inset-bottom) + 26px)}.header{margin-bottom:15px}.branding{display:flex;gap:12px;align-items:center}.logo{min-width:53px;height:53px;display:grid;place-items:center;background:linear-gradient(135deg,#173c52,#078f7a);border-radius:17px;color:white;font-size:31px}.eyebrow{font-size:10px;letter-spacing:1.5px;font-weight:800;color:#6b8b94}.branding h1{font-size:clamp(20px,5vw,26px);letter-spacing:-.5px;margin:2px 0}.branding p{font-size:12px;color:#73919a;margin:3px 0}.back{display:inline-block;text-decoration:none;color:#0d786d;font-size:13px;font-weight:750;margin-top:11px}.panel{background:#fff;border:1px solid #d9e6e7;border-radius:19px;padding:14px;box-shadow:0 8px 25px #173b500e;margin-bottom:12px}.kicker,.card-meta{font-size:11px;color:#6e8c94;letter-spacing:1.6px;font-weight:900}.switch{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:10px 0}.switch button,.btn,.restart{border-radius:13px;padding:12px 8px;background:#f5fafb;border:1px solid #cbdfe1;color:#365e6e;font-size:13px;font-weight:800}.switch button.selected,.btn.primary{background:linear-gradient(115deg,#058c7a,#156778);color:white;border-color:transparent}.section-hint{color:#778e95;font-size:12px;line-height:1.5;margin:7px 1px 14px}.view-switch{margin-bottom:0}.two-cols{display:grid;grid-template-columns:1fr 1fr;gap:10px}.two-cols label{font-size:12px;color:#617f8a;font-weight:800}.two-cols select{display:block;width:100%;padding:11px 7px;margin-top:6px;border:1px solid #bcd5d9;border-radius:11px;background:#f8fcfc;color:#173b50;font-size:13px;font-weight:750;min-width:0}.card-meta{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-top:19px}.card-meta span:last-child{font-size:12px;letter-spacing:0;background:#e8f4ef;color:#11735f;border-radius:30px;padding:7px 12px}.progress{height:7px;border-radius:12px;background:#e7eff0;margin:12px 0 13px;overflow:hidden}.progress div{width:0;background:linear-gradient(90deg,#00a188,#167585);height:100%;transition:width .2s}.flashcard{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;min-height:295px;border-radius:19px;border:1px solid #dde9e6;background:linear-gradient(135deg,#fafeff,#fff9ed);padding:24px 12px;gap:8px;color:#173b50;cursor:pointer}.big-hanzi{font-family:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;color:#111e26;font-size:clamp(100px,22vw,156px);line-height:1.25}.card-hint{font-size:12px;color:#91a6a9}.card-back{display:flex;flex-direction:column;align-items:center;gap:5px;max-width:100%}.card-back strong{font-size:23px}.card-back>span{font-size:15px;font-weight:650;line-height:1.4;text-align:center}.card-back #card-strokes{font-size:12px;color:#6a8993;font-weight:500}.variant{font-size:13px!important;color:#648c8d}.action-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:13px}.btn{min-height:47px}.btn.outline{background:#fff}.study-message{text-align:center;color:#5e8a90;font-size:12px;min-height:19px;line-height:1.5;margin:14px 2px 8px}.restart{width:100%;background:transparent;border-color:transparent;color:#437a80}.list-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:4px 0 15px}.list-heading strong{font-size:17px}.list-heading span{font-size:12px;background:#e7f5ee;color:#137865;padding:6px 12px;border-radius:20px}.radical-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.radical-item{background:linear-gradient(125deg,#fbfffe,#fffbf6);border:1px solid #dfebe8;border-radius:13px;min-width:0;min-height:126px;padding:10px;display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center}.radical-char{font-family:"PingFang SC","Noto Sans CJK SC",sans-serif;font-size:45px;color:#142a32;line-height:1.25}.radical-num{align-self:start;color:#88a0a5;font-size:10px}.radical-pinyin{font-size:13px;font-weight:800}.radical-meaning{font-size:12px;line-height:1.4;color:#4f747d;overflow-wrap:anywhere}.radical-variant{font-size:11px;color:#829c9f}.source-note{font-size:11px;color:#779098;line-height:1.6;padding:2px 7px 0}footer{text-align:center;font-size:11px;line-height:1.9;margin:20px 0;color:#7c969e}footer strong{color:#1e596b}button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #38bd9f;outline-offset:3px}@media(min-width:550px){.radical-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.flashcard{min-height:350px}}@media(max-width:360px){.app{padding-left:9px;padding-right:9px}.panel{padding:11px}.switch button{font-size:11px;padding:12px 4px}.two-cols select{font-size:11px}.big-hanzi{font-size:105px}.radical-grid{gap:7px}.radical-item{padding:8px}}

/* HSK radical links */
.view-switch{grid-template-columns:repeat(3,minmax(0,1fr))}
.view-switch button{font-size:12px;line-height:1.3;padding:11px 4px}
.hsk-panel{margin-top:14px}.hsk-pickers{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:14px 0}
.hsk-pickers label{font-size:13px;font-weight:750;color:#587986}
.hsk-pickers select{display:block;width:100%;min-width:0;background:#f9fdfd;border:1px solid #c9dee1;border-radius:12px;padding:10px 8px;margin-top:6px;color:#173b50;font:inherit}
.all-counts{display:grid;grid-template-columns:repeat(5,1fr);gap:5px;margin:11px 0}
.count-pill{border:1px solid #d6e7e4;background:#f5faf9;color:#3c6a72;border-radius:11px;padding:9px 3px;font-size:11px;font-weight:750;display:flex;flex-direction:column;gap:4px;align-items:center}
.count-pill strong{font-size:15px}.count-pill.chosen{background:#087e72;color:white;border-color:#087e72}
.hsk-status{font-size:12px;line-height:1.6;color:#577987;margin:10px 0}
.hsk-view-switch{margin:10px 0;display:grid;grid-template-columns:1fr 1fr;gap:8px}.hsk-view-switch button{font-size:13px}
.word-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;max-height:510px;overflow-y:auto;padding:3px}
.hsk-item{border:1px solid #dcecea;border-radius:14px;background:#f8fdfc;min-width:0;padding:12px 7px;text-align:center}
.hsk-item-index{font-size:11px;color:#829aa4}.hsk-item-hanzi{display:block;font-size:27px;font-weight:800;color:#152b39;word-break:break-word;line-height:1.5;margin:4px 0}
.hsk-item-match{font-size:11px;color:#0b7e70;display:block}
.hsk-flashcard{min-height:300px}.hsk-flashcard .big-hanzi{font-size:clamp(52px,13vw,94px)}
.compact{margin-top:13px;font-size:11px;line-height:1.6}
@media(max-width:375px){.view-switch button{font-size:10px}.hsk-pickers{grid-template-columns:1fr}.count-pill{font-size:10px}.hsk-item-hanzi{font-size:22px}}

.grade-known{background:#138b70;color:white;border-color:#138b70}.grade-missed{color:#9a6224;background:#fffaf0;border-color:#edce9c}.grade-counter{font-size:12px;color:#5b7f88;text-align:center;line-height:1.5;margin:8px 0}