/* ClearStep sentence-entry interaction specification v2 */
[hidden]{display:none!important}
.shell{position:relative}.card{position:relative}.header-actions{display:flex;align-items:center;justify-content:flex-end;gap:12px}.review-entry,.logout-button,.learning-tools button{appearance:none;border:1px solid #53627a;border-radius:10px;background:#17243a;color:var(--cream);padding:9px 12px;cursor:pointer}.review-entry:hover,.logout-button:hover,.learning-tools button:hover{border-color:var(--gold)}.review-entry span{display:inline-grid;place-items:center;min-width:20px;height:20px;margin-left:4px;border-radius:99px;background:var(--gold);color:#15110a;font-weight:800;font-size:11px}.learning-tools{position:absolute;z-index:5;top:24px;right:28px;display:flex;justify-content:flex-end;gap:8px}.learning-tools button.active{border-color:var(--gold);background:#49371f;color:#ffe4a1}
.login-shell{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:stretch}.login-intro{padding:18px 8px}.login-intro h1{font-size:clamp(38px,6vw,60px);line-height:1.08;margin:15px 0}.login-intro h1 em{display:block;color:var(--gold);font-style:normal}.login-points{display:grid;gap:11px;margin-top:28px}.login-points span{padding:11px 13px;border-left:2px solid var(--gold);background:#111d30;color:#c8d2e1}.login-panel{padding:25px;border:1px solid #52617a;border-radius:18px;background:#101a2d}.login-panel h2{margin:0 0 8px}.login-label{display:block;margin:16px 0 7px;color:#bcc8d8;font-size:13px}.login-input{width:100%;height:48px;padding:0 13px;border:1px solid #5a6880;border-radius:10px;background:#0b1424;color:var(--cream);font-size:17px;outline:none}.login-input:focus{border-color:var(--gold);box-shadow:0 0 0 3px #e7bd6725}.login-panel .btn{width:100%;margin-top:16px}.login-divider{display:flex;align-items:center;gap:10px;margin:20px 0 5px;color:var(--muted);font-size:12px}.login-divider:before,.login-divider:after{content:"";height:1px;flex:1;background:#35435e}.login-error{min-height:22px;margin-top:10px;color:var(--red)}.demo-code{margin-top:14px;padding:10px;border:1px dashed #75643f;border-radius:9px;color:#e9c97e;text-align:center;font:700 14px ui-monospace,monospace}
.review-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:22px 0}.review-tab{appearance:none;padding:12px 8px;border:1px solid #4f5e76;border-radius:11px;background:#15243a;color:var(--cream);cursor:pointer}.review-tab.active{border-color:var(--gold);background:#49371f}.review-list{display:grid;gap:10px}.review-item{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;padding:15px;border:1px solid #3c4b63;border-radius:13px;background:#111c2f}.review-item h3{margin:0 0 5px;color:var(--gold)}.review-item p{margin:4px 0;color:var(--muted);line-height:1.45}.review-meta{font-size:12px;color:#99a9c0}.review-empty{text-align:center;padding:42px 10px;color:var(--muted)}
.input-instruction{text-align:center;color:var(--muted);font-size:13px;margin:0 0 12px}
.letter-slots,.word-slots{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 10px;justify-content:center}
.editable-slots{padding:18px 12px}
.letter-cell,.word-cell{appearance:none;outline:none;color:var(--cream);caret-color:var(--gold);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.letter-cell{width:42px;height:52px;border:0;border-bottom:3px solid #7587a3;border-radius:0;background:transparent;text-align:center;font-size:27px;font-weight:800}
.letter-cell:focus,.letter-cell.filled{border-color:#dbe6f7;box-shadow:0 5px 0 -3px #fff}
.word-cell{width:calc(var(--word-ch) * 1.05ch + 24px);min-width:70px;max-width:230px;height:54px;padding:8px 6px;border:0;border-bottom:4px solid #7587a3;background:transparent;text-align:center;font-size:24px;font-weight:750}
.word-cell:focus,.word-cell.filled{border-color:#dbe6f7;background:transparent}
.word-cell:focus{box-shadow:0 5px 0 -3px #fff}
.sentence-entry-step .zh{font-size:22px;text-align:center}
.sentence-title-row{display:flex;align-items:center;justify-content:space-between;gap:18px}
.sentence-title-row h2{margin:0}
.sentence-audio{appearance:none;display:inline-flex;align-items:center;gap:9px;border:1px solid #a98b50;border-radius:15px;padding:10px 14px;background:linear-gradient(145deg,#263b60,#15233b);color:var(--cream);box-shadow:0 8px 22px #0005,inset 0 1px #ffffff20;cursor:pointer}
.sentence-audio:hover,.sentence-audio:focus{outline:none;border-color:#ffe39a;box-shadow:0 0 0 3px #e7bd6728,0 9px 25px #0006}
.sentence-audio span{font-size:25px}.sentence-audio small{font-size:13px;font-weight:750}
.sentence-entry-step .clue-bar{margin-top:14px}.sentence-entry-step .clue-button{padding:8px 7px;font-size:12px;opacity:.85}.sentence-entry-step .clue-button.active{opacity:1}
.sentence-actions{position:sticky;bottom:8px;display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:9px;margin-top:16px;padding:10px;border:1px solid #35435e;border-radius:14px;background:#111c30ee;backdrop-filter:blur(12px);z-index:4}
.btn.skip{background:#17243a;border-color:#66758d}
.completion-modal{position:fixed;inset:0;display:grid;place-items:center;padding:20px;background:#060b15df;backdrop-filter:blur(10px);z-index:100}
.completion-dialog{width:min(680px,94vw);padding:42px 30px;text-align:center;border:1px solid #c79d4f;border-radius:24px;background:radial-gradient(circle at 50% 0,#344d78,#152138 54%,#101827);box-shadow:0 30px 100px #000b,0 0 60px #e7bd6720}
.completion-mark{display:grid;place-items:center;width:76px;height:76px;margin:0 auto 18px;border-radius:50%;background:linear-gradient(135deg,#e7bd67,#fff0a6);color:#152036;font-size:42px;font-weight:900;box-shadow:0 0 35px #e7bd6755}
.completion-dialog h1{margin:12px 0;color:var(--gold)}.completion-dialog>p{font-size:clamp(23px,4vw,34px);line-height:1.45;margin:22px auto;max-width:580px}
.modal-audio{margin:0 auto 20px}.modal-continue{display:block;width:min(300px,100%);margin:auto}
.resume-card{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:24px 0;padding:20px;border:1px solid #9d814c;border-radius:16px;background:linear-gradient(135deg,#2c2940,#17243b);box-shadow:0 12px 32px #0004}.resume-card h2{margin:6px 0;color:var(--gold)}.resume-card p{margin:0;color:var(--muted)}.resume-card .btn{flex:0 0 auto}
.recommended-words{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 28px}.recommended-words span{display:flex;align-items:center;gap:9px;padding:10px 15px;border:1px solid #52617a;border-radius:999px;background:#111d31;color:var(--cream);font-size:17px}.recommended-words b{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#d4af61;color:#111827;font-size:12px}
.mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:0 0 24px}.mode-card{appearance:none;min-height:190px;padding:24px;text-align:left;border:1px solid #50617d;border-radius:20px;background:linear-gradient(150deg,#1d2c47,#111b2d);color:var(--cream);cursor:pointer;box-shadow:0 16px 35px #0004;transition:.18s ease}.mode-card:hover,.mode-card:focus{outline:none;transform:translateY(-3px);border-color:#e7bd67;box-shadow:0 18px 42px #0007,0 0 0 3px #e7bd6725}.mode-card.featured{border-color:#ad8440;background:radial-gradient(circle at 90% 0,#5b3b34,#1c2941 56%,#111a2b)}.mode-card strong,.mode-card span,.mode-card small{display:block}.mode-card strong{color:var(--gold);font-size:24px}.mode-card span{margin:16px 0;line-height:1.6}.mode-card small{color:var(--muted)}
.mastery-strip{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0 18px}.mastery-badge{padding:6px 9px;border:1px solid #45536a;border-radius:9px;background:#121d30;color:#aeb8c8;font-size:11px}.mastery-badge b{margin-right:5px;color:#e8edf5}.mastery-badge.mastered{border-color:#3c966b;color:#8fe0b7;background:#143025}.mastery-badge.needs_review{border-color:#a65353;color:#ffb0aa;background:#351b22}.mastery-badge.assisted{border-color:#a67d3e;color:#f0c77d;background:#33271a}.mastery-badge.practicing{border-color:#527ab4;color:#a9cbff;background:#172945}
@media(max-width:680px){.letter-cell{width:38px;height:48px;font-size:22px}.word-cell{font-size:20px}.sentence-actions{grid-template-columns:1fr}.sentence-title-row{align-items:flex-start}.sentence-audio small{display:none}}
@media(max-width:760px){.mode-grid{grid-template-columns:1fr}.mode-card{min-height:0}}
@media(max-width:600px){.header-actions{align-items:flex-end;flex-direction:column}.review-tabs{grid-template-columns:1fr 1fr}.review-item{grid-template-columns:1fr}.learning-tools{position:static;justify-content:stretch;margin:0 0 10px}.learning-tools button{flex:1}}
@media(max-width:720px){.login-shell{grid-template-columns:1fr}.login-intro{padding:0}.login-panel{padding:20px}}
@media(max-width:520px){.resume-card{align-items:stretch;flex-direction:column}.resume-card .btn{width:100%}}

/* P2-1 review run */
.review-overview{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}.review-overview>div,.review-quick-start{padding:17px;border:1px solid #43536d;border-radius:14px;background:#111c30}.review-overview h2,.review-quick-start h2{margin:0 0 10px;font-size:17px}.review-chips{display:flex;flex-wrap:wrap;gap:7px}.review-chips span{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border:1px solid #566681;border-radius:999px;color:#cbd5e5;font-size:12px}.review-chips b{color:var(--gold);font-size:15px}.review-quick-start{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:12px 0 20px;border-color:#8b7449;background:linear-gradient(135deg,#2b2630,#15243a)}.review-quick-start p{margin:5px 0 0;color:var(--muted);font-size:13px}.review-size-buttons{display:flex;gap:8px}.review-size-buttons .btn{min-width:72px}.review-run-status{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:0 0 20px;padding:13px 15px;border:1px solid #8b7449;border-radius:13px;background:#251f18}.review-run-status>div b,.review-run-status>div span{display:block}.review-run-status>div b{color:var(--gold)}.review-run-status>div span{margin-top:3px;color:var(--muted);font-size:12px}.review-run-status dl{display:flex;gap:8px;margin:0}.review-run-status dl div{min-width:66px;padding:6px 8px;text-align:center;border-radius:8px;background:#121b2c}.review-run-status dt{color:var(--muted);font-size:10px}.review-run-status dd{margin:2px 0 0;color:var(--cream);font-weight:800}.review-summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:25px 0}.review-summary-grid div{padding:18px 10px;border:1px solid #506078;border-radius:13px;background:#111c30}.review-summary-grid b,.review-summary-grid span{display:block}.review-summary-grid b{color:var(--gold);font-size:30px}.review-summary-grid span{margin-top:6px;color:var(--muted);font-size:12px}
@media(max-width:600px){.review-overview{grid-template-columns:1fr}.review-quick-start,.review-run-status{align-items:stretch;flex-direction:column}.review-size-buttons{display:grid;grid-template-columns:repeat(3,1fr)}.review-run-status dl{display:grid;grid-template-columns:repeat(3,1fr)}.review-summary-grid{grid-template-columns:1fr 1fr}}
.review-task-details{margin-top:12px;border:1px solid #44546f;border-radius:13px;overflow:hidden}.review-task-details summary{padding:14px 16px;color:var(--muted);cursor:pointer;background:#101a2c}.review-task-details[open] summary{color:var(--gold);border-bottom:1px solid #44546f}