.brand-button{background:none;border:0;padding:0;text-align:left}.brand-button:hover{opacity:.85}.login{max-width:460px;margin:32px auto 70px}.panel{background:var(--panel);padding:25px;border:1px solid var(--line);border-radius:18px}.form{display:grid;gap:12px}.form label{display:grid;gap:7px;color:var(--muted);font-size:14px}.form input,.form select{width:100%}select{font:inherit;border:1px solid #9aa8bc;background:#ffffff;color:var(--text);border-radius:10px;padding:13px;min-height:48px}.wide{width:100%}.notice{padding:15px 18px;border-radius:12px;background:#e7f5ec;color:#185c3e;margin-top:20px;white-space:pre-wrap;overflow-wrap:anywhere}.notice.error{background:#fff0f2;color:#962b3e}.notice:empty{display:none}.split{display:grid;grid-template-columns:minmax(270px,340px) 1fr;gap:25px;align-items:start}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px}td,th{text-align:left;padding:14px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-weight:500}td small{display:block;color:var(--muted)}.badge{display:inline-block;padding:3px 9px;border-radius:6px;background:#eef0ff;font-size:12px;color:var(--accent)}.child-picker{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.child-picker .selected{background:var(--accent);color:#ffffff}.topic-select{display:flex;gap:12px;align-items:flex-start;padding:15px;border:1px solid var(--line);border-radius:12px;background:#ffffff;cursor:pointer}.topic-select input{width:20px;height:20px;min-height:20px;margin:4px 0;accent-color:var(--accent)}.topic-select span{flex:1}.topic-select small{display:block;color:var(--muted);font-size:12px}.topic-select:has(input:checked){border-color:#7679ce}.permission-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.sticky-save{position:sticky;bottom:12px;background:#fffffff2;border:1px solid #b2bfd5;border-radius:14px;padding:13px;display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:20px;backdrop-filter:blur(12px);z-index:1}.account-name{font-size:13px;color:var(--muted)}.level-grid{display:grid;gap:12px}.level-grid button{text-align:left;background:#f7f8ff;border:1px solid #bac5d6;color:var(--text)}.level-grid button:hover{background:#eceeff}.level-grid small{display:block;color:var(--muted);font-weight:400;margin-top:5px}.secret{font-family:Consolas,monospace;font-size:18px;background:#f0f3fa;padding:16px;border-radius:10px;white-space:pre-wrap;overflow-wrap:anywhere}.mini{font-size:13px;padding:7px 12px;min-height:40px}.row-actions{display:flex;gap:6px;flex-wrap:wrap}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:20px 0}.summary-grid>div{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px}.summary-grid b{display:block;font-size:28px}.summary-grid span{color:var(--muted);font-size:13px}.question{white-space:pre-line}.resume{padding:16px 20px;background:#edf2fc;border:1px solid #b0bfdc;border-radius:13px;margin:20px 0;display:flex;align-items:center;justify-content:space-between;gap:15px}.subtle{color:var(--muted);font-size:13px}.feedback:empty{display:none}.num-label{display:block;margin-bottom:9px;color:var(--muted)}button[aria-busy=true]{opacity:.6;pointer-events:none}.loading{opacity:.55;pointer-events:none}.report-question{max-width:450px;white-space:pre-line}.group-actions{display:flex;gap:8px}.parent-tabs{margin:22px 0}.empty h2{color:var(--text)}.empty p{margin-bottom:0}.modal-title{padding-right:44px}.modal-close{float:right}.admin-toolbar{display:flex;gap:12px;margin-bottom:18px}.admin-toolbar input{flex:1}.history-time{white-space:nowrap}.note{line-height:1.6}@media(max-width:850px){.split{grid-template-columns:1fr}.permission-grid{grid-template-columns:1fr}.summary-grid{gap:8px}.summary-grid>div{padding:13px}.account-name{display:none}}@media(max-width:500px){.login{margin-top:20px}.panel{padding:20px}.sticky-save{align-items:stretch;flex-direction:column}.resume{align-items:stretch;flex-direction:column}.group-actions{flex-wrap:wrap}.section-heading{align-items:flex-start;flex-direction:column}.summary-grid b{font-size:23px}.admin-toolbar{flex-direction:column}header{gap:9px}.header-actions{gap:6px}.header-actions button{font-size:12px;padding:9px;min-height:42px}}

[hidden]{display:none!important}

.topic-select:has(input:checked){background:#f0f2ff}.sticky-save{box-shadow:0 5px 24px #23355212}

.question-layout{margin:20px 0 28px}.question-instruction{font-size:18px;font-weight:500;color:var(--muted);margin:0 0 14px}.question-equation{padding:22px 24px;background:#f5f6ff;border:1px solid #e0e3f4;border-radius:14px;font-size:clamp(25px,4vw,34px);font-weight:650;line-height:1.55;color:var(--text);font-variant-numeric:tabular-nums;white-space:pre-wrap;overflow-wrap:anywhere}@media(max-width:500px){.question-equation{padding:18px 16px;font-size:25px}.question-instruction{font-size:17px}}