:root{--coach-ink:#203d35;--coach-green:#176b5b;--coach-muted:#65756e;--coach-border:#dfe5dc;--coach-paper:#fffefb;--coach-bg:#f5f5ee}
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.coach-ready:not(.coach-material)>.day-top,.coach-ready:not(.coach-material)>.four-round-banner,.coach-ready:not(.coach-material)>.day-index,.coach-ready:not(.coach-material)>.chapter-shell,.coach-ready:not(.coach-material)>.day-nav,.coach-ready:not(.coach-material)>.day-task{display:none}
.coach-material>#study-coach{display:none}.coach-return{display:none}.coach-material>.coach-return{display:block;position:fixed;bottom:18px;right:18px;z-index:40;border:0;border-radius:30px;background:var(--coach-green);color:#fff;padding:13px 22px;box-shadow:0 5px 18px #173d332b;cursor:pointer;font:600 15px/1.5 inherit}
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#study-coach *{box-sizing:border-box}#study-coach [hidden]{display:none!important}#study-coach button,#study-coach a{-webkit-tap-highlight-color:transparent}#study-coach button{font-family:inherit;cursor:pointer}#study-coach button:disabled{cursor:default;opacity:.5}#study-coach button:focus-visible,#study-coach a:focus-visible,#study-coach textarea:focus-visible,#study-coach summary:focus-visible{outline:3px solid #d2a950;outline-offset:4px}#study-coach a{color:var(--coach-green);text-decoration:none}#study-coach h1,#study-coach h2,#study-coach p{letter-spacing:0}
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#study-coach main.coach-session{max-width:860px;margin:0 auto;padding:22px 24px 60px}.coach-session-bar{display:flex;gap:15px;align-items:center;font-size:12px;color:var(--coach-muted)}.coach-session-bar>span:first-of-type{margin-left:auto}.coach-clock{font-variant-numeric:tabular-nums;white-space:nowrap}.coach-secondary{border:1px solid #cbd8cd;background:transparent;border-radius:9px;min-height:42px;padding:9px 14px;color:var(--coach-green);font-size:13px;line-height:1.5}.coach-text-button{border:0;background:transparent;color:var(--coach-muted);padding:10px 0;min-height:42px;font-size:13px}.coach-track{display:flex;gap:0;padding:24px 0 18px}.coach-track span{flex:1;text-align:center;font-size:12px;color:#95a299;border-bottom:3px solid #dfe5dc;padding-bottom:9px}.coach-track .reached{color:var(--coach-green);border-color:#6b9d7c}.coach-focus-card{background:var(--coach-paper);border:1px solid var(--coach-border);border-radius:18px;padding:28px 34px}.coach-location{font-size:11px;color:var(--coach-muted);border-bottom:1px solid #edf0e8;padding-bottom:15px;margin-bottom:22px;overflow-wrap:anywhere}.coach-focus-card h1{font-size:25px;line-height:1.65;margin:10px 0 22px}.coach-focus-card .coach-kicker{margin:0 0 8px}.coach-answer{background:#edf4e9;border:1px solid #d8e5d3;border-radius:10px;padding:15px 20px;font-size:18px;line-height:1.9}.coach-answer p{margin:0}.coach-answer>b{display:block;font-size:12px;color:var(--coach-green);margin-bottom:8px}.coach-explanation{font-size:16px;line-height:1.95;margin:20px 0;color:#3e544a}.coach-example{font-size:15px;line-height:1.9;border-left:3px solid #c9aa68;padding:0 0 0 17px;margin:20px 0}.coach-example b{font-size:12px;color:#8b7344}.coach-example p{margin:5px 0}.coach-trap{font-size:13px;color:var(--coach-muted);margin:18px 0}.coach-trap summary{cursor:pointer}.coach-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:26px}.coach-recall-label{display:block;font-size:14px;color:var(--coach-muted);margin-bottom:8px}#coach-recall{width:100%;resize:vertical;min-height:118px;border:1px solid #cbd8cd;border-radius:10px;background:#fcfcf8;padding:15px;font:16px/1.8 inherit;color:var(--coach-ink);margin-bottom:15px}.coach-hint{font-size:13px;color:var(--coach-muted);margin:15px 0}.coach-options{display:grid;gap:10px}.coach-option{width:100%;border:1px solid #d9e0d6;border-radius:10px;background:#fff;text-align:left;padding:14px 17px;font-size:16px;line-height:1.8;color:var(--coach-ink)}.coach-option.selected{border-color:var(--coach-green);background:#f0f6ed;box-shadow:inset 0 0 0 1px var(--coach-green)}#study-coach .coach-option:disabled{opacity:1}.coach-option.correct{background:#e8f4e5;border-color:#729c63}.coach-option.incorrect{background:#fff0e9;border-color:#cf9175}.coach-feedback{border-left:3px solid #799d64;background:#f1f6ed;padding:14px 18px;margin-top:22px;border-radius:6px;font-size:15px;line-height:1.9}.coach-feedback.retry{background:#fff5e8;border-color:#c89f60}.coach-feedback p{margin:8px 0 0}.coach-media{max-width:100%;height:auto}.coach-pause,.coach-finish{text-align:center;padding:40px 8px}.coach-pause h2{font-size:26px}.coach-pause p,.coach-finish p{color:var(--coach-muted)}.coach-checkmark{display:grid;place-items:center;width:64px;height:64px;border-radius:50%;background:#e3eddb;color:var(--coach-green);font-size:30px;margin:15px auto 22px}.coach-finish h1{font-size:34px}.coach-finish .coach-actions{justify-content:center}.coach-finish-link{display:block;font-size:14px;margin-top:22px}.coach-loading{padding:30px;text-align:center;font-size:14px}
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.coach-material.day-fast [data-step="kp"],.coach-material.day-fast [data-step="text"],.coach-material.day-fast [data-step="lec"]{display:block}
.coach-task-list{list-style:none;padding:0;margin:12px 0}.coach-task-list li{padding:12px 0;border-bottom:1px solid var(--coach-border)}.coach-task-list small{display:block;color:var(--coach-muted);line-height:1.7}
#study-coach .coach-start-card h2{color:var(--coach-ink)}