:root{
  --bg:#fff8f1;--card:#ffffff;--ink:#2f241d;--muted:#7b6b61;--line:#f0dfd2;
  --orange:#f97316;--orange-dark:#c94f08;--orange-soft:#fff0e5;--orange-soft-2:#fff7ed;
  --green:#16a34a;--green-soft:#effcf3;--red:#dc2626;--red-soft:#fff1f1;--shadow:0 14px 40px rgba(147,72,18,.08)
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:linear-gradient(180deg,#fffaf5 0,#fff6ed 100%);color:var(--ink);min-height:100vh}
.wrap{max-width:1080px;margin:0 auto;padding:28px}
.center{max-width:680px;margin:4vh auto}.narrow{max-width:540px}
.card,.stat-card,.action-card{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.card{padding:24px;margin-bottom:18px}
h1,h2,h3{margin-top:0;color:#2c211a}h1{line-height:1.15}p{line-height:1.55}
.eyebrow{font-size:.78rem;letter-spacing:.12em;font-weight:900;color:var(--orange-dark);margin-bottom:6px}
.muted{color:var(--muted)}.small{font-size:.9rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}.options-grid{margin-top:4px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.space-between{justify-content:space-between}
.topbar,.section-head,.student-topbar,.join-card{display:flex;justify-content:space-between;align-items:center;gap:16px}.topbar{margin-bottom:20px}.section-head{align-items:flex-start}.student-topbar{margin-bottom:16px}.join-card{padding:20px 24px}
input,select,textarea{width:100%;padding:13px 14px;border:1px solid #e7d2c4;border-radius:12px;font:inherit;background:#fff;color:var(--ink);outline:none;transition:.2s}
input:focus,select:focus,textarea:focus{border-color:var(--orange);box-shadow:0 0 0 4px rgba(249,115,22,.12)}
textarea{resize:vertical}label{font-weight:800;display:block;margin:13px 0 7px}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 18px;font-weight:900;cursor:pointer;background:linear-gradient(135deg,var(--orange),#fb923c);color:#fff;text-decoration:none;box-shadow:0 8px 20px rgba(249,115,22,.18)}
.btn:hover{transform:translateY(-1px)}.btn.alt{background:#fff;color:var(--ink);border:1px solid #e7d2c4;box-shadow:none}.btn.warn{background:#ea580c}.btn.red{background:var(--red)}.btn.green{background:var(--green)}.btn.danger-outline{background:#fff;color:var(--red);border:1px solid #fecaca;box-shadow:none}.full-width{width:100%}
.flash{background:#fff3e8;border:1px solid #fdba74;padding:13px 15px;border-radius:12px;margin-bottom:14px;color:#9a3412;font-weight:700}
.pill{display:inline-block;padding:7px 11px;border-radius:999px;background:#f7f1ed;font-weight:800}.pill.orange{background:var(--orange-soft);color:var(--orange-dark)}
.status{display:inline-flex;align-items:center;padding:5px 9px;border-radius:999px;font-size:.78rem;font-weight:900;text-transform:uppercase;letter-spacing:.04em;background:#f5f5f4;color:#57534e}.status-waiting{background:#fff7ed;color:#c2410c}.status-live_question{background:#ffedd5;color:#9a3412}.status-result{background:#ecfdf3;color:#166534}.status-ended{background:#f3f4f6;color:#4b5563}
.action-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:20px}.action-card{padding:22px;display:flex;gap:16px;text-decoration:none;color:inherit;transition:.2s}.action-card:hover{border-color:#fdba74;transform:translateY(-2px)}.action-card h2{margin-bottom:6px}.action-card p{margin:0;color:var(--muted)}.action-icon{width:48px;height:48px;border-radius:14px;background:var(--orange-soft);display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:var(--orange-dark);flex:0 0 auto}
.quiz-row{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:18px 0;border-bottom:1px solid #f1e6de}.quiz-row:last-child{border-bottom:0}.quiz-title{font-size:1.08rem;font-weight:900}.quiz-meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:.9rem;margin:5px 0}.code-line{font-size:.9rem;color:#7c2d12}.empty-state{text-align:center;padding:26px 10px}
.info-box{background:var(--orange-soft-2);border:1px solid #fed7aa;border-radius:14px;padding:14px 16px;margin:16px 0;color:#7c2d12}.sticky-settings{position:sticky;top:10px;z-index:5}.checkline{display:flex;align-items:center;gap:8px}.checkline input{width:auto}
.import-question{border-top:1px solid #f0e4dc;padding:20px 0}.import-question:first-child{border-top:0}.answer-chip{display:inline-block;margin-top:10px;background:#ecfdf3;color:#166534;border-radius:999px;padding:6px 10px;font-weight:900}
.question-builder{position:relative}.builder-actions{display:flex;justify-content:space-between;gap:14px;position:sticky;bottom:10px;padding:12px;background:rgba(255,248,241,.94);backdrop-filter:blur(8px);border-radius:16px;z-index:4}.image-tools{display:grid;gap:10px}.paste-zone{border:2px dashed #fdba74;background:#fff7ed;color:#9a3412;border-radius:14px;padding:18px;text-align:center;cursor:text;outline:none}.paste-zone:focus{border-color:var(--orange);box-shadow:0 0 0 4px rgba(249,115,22,.1)}.image-preview img{max-width:100%;max-height:320px;border-radius:12px;border:1px solid var(--line)}.ok-text{margin-top:6px;color:var(--green);font-weight:800}
.stats-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin-bottom:18px}.stat-card{padding:18px;text-align:center}.stat-card.success{background:var(--green-soft);border-color:#bbf7d0}.stat-card.danger{background:var(--red-soft);border-color:#fecaca}.stat-label{font-size:.85rem;color:var(--muted);font-weight:800}.bigstat{font-size:2rem;font-weight:950;margin-top:4px}.stat-note{font-size:.72rem;color:var(--muted);margin-top:3px}.join-link{font-weight:900;color:var(--orange-dark);word-break:break-all;margin:4px 0}
.question-rich{font-family:"Cambria Math","STIX Two Math","Times New Roman",serif;font-size:1.28rem;font-weight:600;line-height:1.65;margin:18px 0;overflow-wrap:anywhere}.preview-rich{font-size:1.1rem;font-weight:500;margin:10px 0}.option-rich,.preview-option{font-family:"Cambria Math","STIX Two Math","Times New Roman",serif;line-height:1.55}.preview-option{padding:10px 12px;margin:7px 0;background:#fffaf6;border:1px solid #f3e7de;border-radius:11px}
.qimg{max-width:100%;max-height:520px;object-fit:contain;border-radius:14px;border:1px solid var(--line);display:block;margin:14px auto}
.option{display:flex;width:100%;align-items:flex-start;gap:10px;text-align:left;padding:15px;border:2px solid #f0dfd2;border-radius:14px;background:#fff;margin:10px 0;cursor:pointer;font-weight:700;color:var(--ink)}.option.selected{border-color:var(--orange);background:#fff7ed;box-shadow:0 0 0 3px rgba(249,115,22,.1)}.option:disabled{cursor:not-allowed;opacity:.82}.opt-letter{flex:0 0 24px;font-weight:950;color:var(--orange-dark)}.option-rich{display:block;flex:1;min-width:0}
.question-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.timer{font-size:2.2rem;line-height:1;font-weight:950;text-align:center;min-width:66px;padding:10px;border-radius:16px;background:var(--orange-soft);color:var(--orange-dark)}.rank{font-size:46px;font-weight:950;color:var(--orange-dark)}.score-row{display:flex;gap:8px;flex-wrap:wrap}.waiting-icon{font-size:2.5rem;margin-bottom:10px}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0}.result-grid>div{background:#fff7ed;border-radius:12px;padding:12px;text-align:center}.result-grid span{display:block;font-size:.8rem;color:var(--muted)}.result-grid b{font-size:1.3rem}.result-summary{background:#fffaf6;border:1px solid #f0dfd2;border-radius:14px;padding:16px;margin-top:16px}.result-counts{display:flex;gap:12px;flex-wrap:wrap}.result-counts span{padding:8px 10px;border-radius:10px;background:#fff}
.result-answer{padding:13px 14px;margin:10px 0;border:1px solid #f0dfd2;border-radius:12px;background:#fffaf6;font-family:"Cambria Math","STIX Two Math","Times New Roman",serif}.correct-answer{border-color:#bbf7d0;background:#f1fff5}.result-answer>div{margin-top:6px;font-size:1.05rem}.ok{color:var(--green)}.bad{color:var(--red)}
.brand-lockup{display:flex;align-items:center;gap:12px;margin-bottom:16px}.brand-mark{width:52px;height:52px;border-radius:16px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--orange),#fb923c);color:#fff;font-weight:950;box-shadow:0 10px 24px rgba(249,115,22,.22)}
.word-math{font-family:"Cambria Math","STIX Two Math","Times New Roman",serif;font-size:1.08em;vertical-align:middle;margin:0 .08em}math[display="block"]{display:block;margin:.55em 0;overflow-x:auto;overflow-y:hidden}.inline-docx-img{max-width:100%;height:auto;vertical-align:middle;margin:.2rem .25rem;border-radius:4px}.docx-line{display:inline}.math-fallback{font-family:"Cambria Math","Times New Roman",serif;font-style:italic}
@media(max-width:900px){.stats-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){.wrap{padding:16px}.action-grid{grid-template-columns:1fr}.quiz-row,.topbar,.student-topbar,.join-card{align-items:flex-start;flex-direction:column}.stats-grid{grid-template-columns:repeat(2,1fr)}.builder-actions{flex-direction:column}.builder-actions .btn{width:100%}.sticky-settings{position:static}.question-rich{font-size:1.12rem}.preview-rich{font-size:1rem}.word-math{font-size:1.02em}.result-grid{grid-template-columns:1fr}.score-row{width:100%}.card{padding:18px}}

/* v3.1 option images + import editor */
.option-edit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:14px 0}.option-editor{border:1px solid #f0dfd2;background:#fffaf6;border-radius:14px;padding:14px}.compact-media{margin-top:10px}.compact-media .paste-zone{padding:12px;font-size:.88rem}.compact-media .image-preview img,.existing-image img{max-width:100%;max-height:220px;object-fit:contain;border-radius:10px;border:1px solid var(--line);display:block;margin-top:8px}.option-preview-img,.option-answer-img{display:block;max-width:100%;max-height:260px;object-fit:contain;border-radius:10px;border:1px solid var(--line);margin:10px 0 2px}.import-editor{margin-top:14px;padding:18px;border:1px solid #fdba74;border-radius:16px;background:#fffaf5}.existing-image{margin:8px 0 12px;padding:10px;border-radius:12px;background:#fff}.edit-toggle{padding:8px 12px}.option-rich .option-answer-img{margin-top:10px}.preview-option .option-preview-img{margin-left:0}
@media(max-width:700px){.option-edit-grid{grid-template-columns:1fr}}