:root{color:#172033;background:#f5f7fb;font-family:Inter,Pretendard,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:#f5f7fb}button,input{font:inherit}.app-shell{min-height:100vh;padding:clamp(16px,3vw,28px);display:grid;gap:16px;max-width:1120px;margin:0 auto}.app-hero{background:#fff;border:1px solid #d9dfef;border-radius:12px;padding:18px}.app-kicker{margin:0 0 6px;color:#0f766e;font-weight:800}h1,h2,h3{margin:0;line-height:1.3}h1{font-size:clamp(1.9rem,4vw,2.8rem);letter-spacing:0}h2{font-size:1.2rem}h3{font-size:1rem}p{margin:0;line-height:1.45}.classroom-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:14px;align-items:start}section{background:#fff;border-radius:12px;border:1px solid #d7deed;padding:16px}.section-kicker{margin:0 0 8px;color:#166534;font-size:.84rem;font-weight:800;text-transform:uppercase;letter-spacing:0}.poll-booth,.teacher-panel,.result-dashboard{display:grid;gap:14px}.poll-heading-row{display:flex;justify-content:space-between;gap:12px;align-items:center}.total-pill{background:#111827;color:#fff;border-radius:999px;min-width:98px;padding:8px 12px;text-align:center}.vote-grid{display:grid;grid-template-columns:repeat(2,minmax(110px,1fr));gap:10px}.vote-button{min-height:84px;border:2px solid #e5e7eb;border-radius:12px;background:#f8fbff;color:#0f172a;padding:10px;display:grid;align-content:center;gap:8px;justify-items:center;cursor:pointer;transition:transform .12s ease,border-color .12s ease}.vote-button:hover,.vote-button:focus-visible{transform:translateY(-1px);border-color:#94a3b8;outline:0}.vote-button span{font-size:1rem;font-weight:700}.vote-button strong{font-size:1.05rem}.vote-button:before{content:"";display:block;width:16px;height:16px;border-radius:999px;background:var(--option-color);margin-bottom:2px}.primary-button,.ghost-button{min-height:44px;border-radius:10px;border:1px solid transparent;font-weight:700;cursor:pointer}.primary-button{background:#2563eb;color:#fff}.primary-button:hover,.primary-button:focus-visible{background:#1d4ed8;outline:0}.ghost-button{border-color:#e2e8f0;background:#f8fafc;color:#b91c1c}.ghost-button:hover,.ghost-button:focus-visible{background:#fee2e2;outline:0}.secondary-button{min-height:40px;border-radius:8px;border:1px solid #cbd5e1;background:#f8fafc;color:#0f172a;font-weight:700}.secondary-button:hover,.secondary-button:focus-visible{background:#eff6ff;outline:0}.field{display:grid;gap:6px}.field span{font-size:.85rem;color:#334155}.field input{min-height:40px;border-radius:8px;border:1px solid #cbd5e1;padding:8px 10px;outline:0}.field input:focus{border-color:#2563eb;box-shadow:0 0 0 3px #dbeafe}.option-editor-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.field.compact{min-width:0}.field.compact input{max-width:100%}.preset-controls{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}.preset-controls select,.preset-controls .ghost-button{min-height:40px;border-radius:8px}.preset-controls select{border:1px solid #cbd5e1;background:#fff;color:#0f172a;padding:8px 10px;outline:0}.preset-controls select:focus{border-color:#2563eb;box-shadow:0 0 0 3px #dbeafe}.preset-controls .ghost-button{padding:8px 12px;white-space:nowrap}.field-with-help{display:grid;gap:6px}.mode-banner{margin:0}.room-panel .room-form{display:grid;gap:8px}.room-panel .room-form button{width:100%}.room-panel .room-url-block{display:grid;gap:6px}.room-panel .room-url-block input{width:100%;min-height:40px;border-radius:8px;border:1px solid #cbd5e1;padding:8px 10px;outline:0;background:#f8fafc}.field-warning{margin:2px 0 0;color:#b91c1c;font-size:.84rem}.reset-row{display:grid;gap:6px}.reset-warning{margin:0;color:#b91c1c;font-size:.87rem}.result-header{display:flex;justify-content:space-between;align-items:baseline}.result-dashboard .graph-grid{display:grid;gap:12px;grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch}.result-summary{display:grid;gap:10px}.result-table{width:100%;border-collapse:collapse;border-radius:10px;overflow:hidden}.result-table thead{background:#f8fafc}.result-table th,.result-table td{border:1px solid #d7deed;padding:8px 10px;text-align:left}.graph-panel{min-height:320px;display:grid;gap:10px}.graph-panel.wide{grid-column:span 3}.chart-box{min-height:220px;position:relative}.strip-graph{display:flex;align-items:stretch;width:100%;border-radius:8px;overflow:hidden;min-height:48px;border:1px solid #d7deed}.strip-segment{min-height:100%;color:#fff;font-size:.76rem;display:grid;place-items:center;background:var(--segment-color);text-align:center;padding:2px 6px;overflow:hidden}.strip-legend{list-style:none;margin:10px 0 0;padding:0;display:grid;gap:6px}.strip-legend li{display:flex;align-items:center;gap:8px;font-size:.88rem}.strip-legend span{width:12px;height:12px;border-radius:50%;display:inline-block}.discussion-prompts{display:grid;gap:6px;background:#f8fafc;border-radius:10px;border:1px solid #d7deed;padding:10px;font-size:.95rem}.discussion-order{margin-top:4px;padding-top:6px;border-top:1px dashed #d7deed;display:grid;gap:6px}.discussion-order h4{font-size:.92rem}.discussion-order ol{margin:0;padding-left:18px;display:grid;gap:4px;font-size:.88rem}.live-status{background:#f8fafc;border:1px solid #d7deed}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:960px){.classroom-grid,.result-dashboard .graph-grid{grid-template-columns:1fr}.graph-panel.wide{grid-column:auto}.vote-grid{grid-template-columns:repeat(2,minmax(100px,1fr))}.option-editor-grid{grid-template-columns:1fr}}@media(max-width:540px){.vote-grid,.preset-controls{grid-template-columns:1fr}.poll-heading-row,.result-header{align-items:flex-start;flex-direction:column}.total-pill{align-self:stretch;text-align:center}}