:root{--bg:#fff7ef;--panel:#fff;--ink:#27211c;--muted:#796b60;--line:#ead9c8;--orange:#f28c28;--orange2:#ffb15e;--dark:#2b241f;--ok:#15803d;--bad:#b91c1c;--warn:#b45309;--shadow:0 10px 28px rgba(88,52,15,.09)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}button,input,textarea{font:inherit}a{color:inherit}.btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 13px;font-weight:800;cursor:pointer}.btn:hover{transform:translateY(-1px)}.btn.primary{background:var(--orange);border-color:var(--orange);color:#fff}.btn.dark{background:var(--dark);border-color:var(--dark);color:#fff}.smallBtn{padding:5px 10px;font-size:12px}.loading,.errorBox{margin:60px auto;padding:24px;max-width:720px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:18px}.errorBox small{display:block;margin-top:10px;color:var(--muted)}
/* Library */
.libraryWrap{width:min(1180px,calc(100% - 30px));margin:0 auto;padding:26px 0 70px}.libraryHero{display:flex;justify-content:space-between;gap:24px;align-items:end;background:linear-gradient(135deg,#fff,#fff0df);padding:28px;border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow)}.libraryHero h1{font-size:clamp(30px,5vw,54px);margin:8px 0}.libraryHero p{margin:0;color:var(--muted);max-width:700px}.backHome{text-decoration:none;font-weight:800;color:#80511f}.heroStats{display:flex;gap:10px}.heroStat{min-width:120px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:13px}.heroStat b{display:block;font-size:25px}.heroStat span{font-size:12px;color:var(--muted)}.dashboard{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;margin:18px 0}.dashCard,.dashIntro{background:#fff;border:1px solid var(--line);border-radius:18px;padding:15px 18px}.dashCard b{display:block;font-size:22px;margin:4px 0}.dashCard small,.dashLabel,.dashIntro span{color:var(--muted)}.dashIntro{grid-column:1/-1;display:flex;gap:12px}.progressTrack{height:8px;background:#f3e5d7;border-radius:999px;overflow:hidden}.progressTrack span{display:block;height:100%;background:var(--orange)}.setSection{margin-top:30px}.setHead{display:flex;justify-content:space-between;align-items:center}.setHead h2{margin:0 0 12px}.setHead span{color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.card{text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow);transition:.18s}.card:hover{transform:translateY(-3px);border-color:var(--orange)}.card.completed{border-bottom:5px solid var(--ok)}.cardTop{display:flex;justify-content:space-between}.cardCode{font-weight:950;color:var(--orange);font-size:22px}.doneBadge{font-size:10px;font-weight:900;background:#dcfce7;color:#166534;padding:5px 8px;border-radius:999px}.cardTitle{font-size:18px;font-weight:900;margin:12px 0;min-height:48px}.cardMeta{color:var(--muted);font-size:13px}.cardStart{margin-top:17px;font-weight:900}.cardResult{display:flex;justify-content:space-between;margin-top:15px;padding-top:12px;border-top:1px solid var(--line)}.cardResult b{font-size:20px}
/* Reader */
.appHeader{height:66px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;background:linear-gradient(90deg,#fff,#fff3e3);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{text-decoration:none;font-weight:950;font-size:19px}.brand span{color:var(--orange)}.brand small{font-size:12px;background:#fff0df;padding:4px 7px;border-radius:999px}.headRight{display:flex;gap:8px;align-items:center}.timer{font-size:23px;font-weight:950;background:var(--dark);color:#fff;border-radius:14px;padding:7px 13px;min-width:100px;text-align:center}.timer.danger{background:var(--bad);animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.65}}.hamburger{font-size:18px}.moreMenu{display:none;position:fixed;right:18px;top:61px;z-index:30;background:#fff;border:1px solid var(--line);border-radius:14px;padding:7px;box-shadow:var(--shadow)}.moreMenu.show{display:grid}.moreMenu button{border:0;background:#fff;text-align:left;padding:10px 12px;border-radius:9px;cursor:pointer}.moreMenu button:hover{background:var(--bg)}.studentStrip{height:42px;padding:0 18px;display:flex;align-items:center;gap:8px;background:#fffaf4;border-bottom:1px solid var(--line);font-size:13px;font-weight:800}.studentStrip span{background:#fff;border:1px solid var(--line);padding:5px 9px;border-radius:999px}.studentStrip .btn{margin-left:auto}.readerGrid{height:calc(100vh - 108px);display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:12px 18px}.pane{min-width:0;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}.paneHead{padding:12px 14px;background:#fffaf4;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px}.paneHead small{display:block;color:var(--muted);font-weight:400}.paneTools{white-space:nowrap}.paneBody{padding:18px;overflow:auto;line-height:1.68}.passageContent{font-family:Georgia,"Times New Roman",serif;font-size:17px;user-select:text}.passageContent p{margin:0 0 1.25em}.footer{padding:9px 14px;border-top:1px solid var(--line);background:#fffaf4;display:flex;justify-content:space-between;align-items:center;font-weight:800;font-size:13px}.footer a{text-decoration:none;color:#80511f}.qcard{border:1px solid var(--line);border-radius:16px;padding:14px;margin:0 0 13px}.qtop{display:flex;justify-content:space-between}.qnum{font-weight:950;background:var(--dark);color:#fff;border-radius:9px;padding:4px 9px}.qtype{font-size:11px;color:var(--muted);font-weight:900;text-transform:uppercase;margin-top:8px}.qtext{font-weight:750;margin:7px 0 10px}.options{display:grid;gap:7px}.opt{display:flex;gap:9px;align-items:flex-start;border:1px solid #eee2d5;border-radius:11px;padding:9px;cursor:pointer}.opt:hover{background:var(--bg)}.textAns,.summaryBox input,.modalCard input{width:100%;padding:10px 12px;border:1px solid #d8c8b8;border-radius:11px}.summaryBox{background:#fffaf4;border:1px solid var(--line);border-radius:13px;padding:12px;line-height:2.8}.summaryBox input{width:155px;margin:0 4px}.flag{border:0;background:#fff1dd;color:#7c3f00;border-radius:999px;padding:6px 10px;font-weight:900;cursor:pointer}.flag.on{background:#ffca7a}.result{font-weight:950;margin-top:9px}.result.correct{color:var(--ok)}.result.wrong{color:var(--bad)}.result.empty{color:var(--warn)}.subResult{margin-top:12px;padding-top:10px;border-top:1px dashed var(--line)}.feedback{margin-top:8px;background:#fff7ef;border:1px solid #f1d1ad;border-left:5px solid var(--orange);border-radius:12px;padding:10px 12px;font-size:13px}.feedbackHead{display:flex;justify-content:space-between;gap:8px;margin-bottom:8px}.feedbackHead span{color:var(--muted);font-weight:800}.fbTitle{font-weight:950;margin:8px 0 4px}.evidence{font-family:Georgia,serif;background:#fff;border:1px solid var(--line);border-radius:9px;padding:8px}.pairs{width:100%;border-collapse:collapse;background:#fff}.pairs th,.pairs td{border:1px solid var(--line);padding:6px;text-align:left}.pairs th{background:#fff3e3}.yourAnswer{margin-top:8px;color:var(--muted)}.marker{background:linear-gradient(transparent 40%,#ffe16a 40%)}.allCorrectBox{padding:30px;text-align:center;border:2px dashed #bbdfc7;border-radius:16px;background:#f0fdf4;color:#166534;font-weight:900}
/* Modals */
.modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,.46);z-index:50;align-items:center;justify-content:center;padding:16px}.modal.show{display:flex}.modalCard{width:min(920px,96vw);max-height:90vh;overflow:auto;background:#fff;border-radius:22px;border:1px solid var(--line);padding:20px}.modalCard.compact{width:min(460px,96vw);display:grid;gap:10px}.modalCard h2{margin-top:0}.modalActions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.scoreGrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.metric{text-align:center;background:#fffaf4;border:1px solid var(--line);border-radius:14px;padding:12px}.metric b{display:block;font-size:26px}.metric span{font-size:12px;color:var(--muted)}.resultAdvice{margin-top:12px;padding:11px;background:#fff3e3;border-radius:12px}.vocabTools{margin-bottom:8px}.vocabGrid{display:grid;grid-template-columns:1fr 1.1fr 1.5fr;gap:8px;align-items:center}.vocabGrid input{padding:9px;border:1px solid #d8c8b8;border-radius:9px}.hidden{visibility:hidden}textarea{width:100%;min-height:330px;padding:12px;border:1px solid #d8c8b8;border-radius:12px;font-family:ui-monospace,Consolas,monospace;font-size:12px}.smallText{font-size:13px;color:var(--muted)}
@media(max-width:900px){.cards{grid-template-columns:1fr 1fr}.readerGrid{height:auto;grid-template-columns:1fr;padding:10px}.pane{min-height:72vh}.appHeader{height:auto;min-height:66px;padding:9px 10px;align-items:flex-start}.headRight{flex-wrap:wrap;justify-content:flex-end}.brand{padding-top:8px}.studentStrip{position:sticky;top:83px;z-index:10}.libraryHero{align-items:stretch;flex-direction:column}.heroStats{align-self:stretch}.heroStat{flex:1}.dashboard{grid-template-columns:1fr}.dashboard .btn{width:100%}.passageContent{font-size:16px}}
@media(max-width:600px){.cards{grid-template-columns:1fr}.libraryWrap{width:min(100% - 18px,1180px)}.libraryHero{padding:19px}.heroStats{display:grid;grid-template-columns:1fr 1fr}.headRight .btn:not(.dark):not(.hamburger){font-size:12px;padding:7px 9px}.timer{font-size:18px;min-width:82px}.paneHead{align-items:flex-start}.paneTools{display:grid;gap:5px}.scoreGrid{grid-template-columns:1fr}.vocabGrid{grid-template-columns:1fr}.vocabGrid>b{display:none}.summaryBox input{width:120px}.footer{gap:6px}.footer span{text-align:center}}
/* Quick practice and one-question checking */
.quickBtn{background:#fff3e3;color:#9a4e08;border-color:#f1c48f}
.singleCheckRow,.summaryCheckRow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:11px}
.checkBtn{border:1px solid #f2b66e;background:#fff7ef;color:#8a4300;border-radius:999px;padding:7px 12px;font-weight:900;cursor:pointer}
.checkBtn:hover{background:#ffedd5;transform:translateY(-1px)}
.checkNote{font-size:12px;font-weight:800;color:var(--muted)}
.checkNote.warn{color:var(--warn)}
.summaryCheckRow{padding-top:10px;border-top:1px dashed var(--line)}

/* Common Reading additions */
.materialCard{border:1px solid var(--line);border-radius:16px;padding:16px;margin:0 0 16px;background:#fffaf4}.materialCard h3{font-family:system-ui,sans-serif;margin:0 0 10px;color:#a95608}.mailHead,.chatName{font-family:system-ui,sans-serif;font-weight:900}.infoTable{width:100%;border-collapse:collapse;font-family:system-ui,sans-serif;font-size:14px}.infoTable th,.infoTable td{border:1px solid var(--line);padding:9px;text-align:left}.infoTable th{background:#fff0df}.chatLine{padding:10px 12px;margin:8px 0;border-radius:14px;background:#f7f7f7;font-family:system-ui,sans-serif}.strikeToggle{margin-left:auto;border:0;background:transparent;color:var(--muted);font-weight:900;cursor:pointer}.opt.eliminated span{text-decoration:line-through;opacity:.48}.testBadge{font-size:11px;color:var(--muted);font-weight:900}.passageContent{font-family:system-ui,-apple-system,"Segoe UI",sans-serif}.passageContent .readingText{font-family:Georgia,"Times New Roman",serif}.choiceHint{font-size:12px;color:var(--muted);margin-top:8px}

/* Common Reading library */
.commonQuestionCards{grid-template-columns:repeat(4,1fr)}
.commonQuestionCard{min-height:225px}
.cardSubtitle{min-height:42px;margin:-4px 0 12px;color:var(--muted);font-size:13px;line-height:1.55}
@media(max-width:1000px){.commonQuestionCards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.commonQuestionCards{grid-template-columns:1fr}.commonQuestionCard{min-height:0}}