:root{--bg: #f4f6f9;--card: #ffffff;--primary: #2563eb;--primary-dark: #1d4ed8;--text: #1f2937;--muted: #6b7280;--border: #e5e7eb;--danger: #dc2626}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;line-height:1.6}.container{max-width:720px;margin:0 auto;padding:16px 14px 64px}.app-header{padding:8px 0 16px}.app-header h1{font-size:1.4rem;margin:0 0 8px}.app-header.admin{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}.admin-bar{display:flex;align-items:center;gap:10px}.role-badge{font-size:.78rem;background:#eef2ff;color:var(--primary-dark);padding:3px 10px;border-radius:999px}.session-title{margin:4px 0 0;color:var(--muted);font-weight:600}.session-select{width:100%;padding:8px;border-radius:8px;border:1px solid var(--border);margin-bottom:6px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px;margin-bottom:12px;box-shadow:0 1px 2px #0000000a}.form textarea,.form input,.toolbar select{width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;font-size:1rem;font-family:inherit}.form textarea{resize:vertical;margin-bottom:10px}.form-row{display:flex;gap:8px;margin-top:8px}.form-row input{flex:1}.form-message{margin:10px 0 0;font-size:.9rem;color:var(--primary-dark)}button{cursor:pointer;border:none;background:var(--primary);color:#fff;padding:10px 16px;border-radius:8px;font-size:.95rem;white-space:nowrap}button:hover{background:var(--primary-dark)}button:disabled{background:#9ca3af;cursor:not-allowed}button.danger{background:var(--danger)}button.danger:hover{background:#b91c1c}.link-btn{background:transparent;color:var(--muted);padding:4px 6px}.link-btn:hover{background:transparent;color:var(--text)}.list-header{display:flex;align-items:center;justify-content:space-between;margin:14px 2px 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2px;text-align:center;color:var(--muted);font-size:.9rem}.notice-card{text-align:center;color:var(--muted);margin-top:24px;line-height:1.8}.qr-caption{font-size:.75rem;color:var(--muted);margin-top:6px}.celebrate{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;pointer-events:none;overflow:hidden}.celebrate-banner{position:absolute;top:36%;left:50%;transform:translate(-50%,-50%);background:linear-gradient(135deg,#f59e0b,#ef4444,#8b5cf6);color:#fff;font-weight:800;font-size:1.5rem;padding:16px 28px;border-radius:16px;box-shadow:0 12px 44px #0000004d;text-align:center;white-space:nowrap;animation:celebratePop 2.6s ease forwards}@keyframes celebratePop{0%{transform:translate(-50%,-50%) scale(.3) rotate(-6deg);opacity:0}15%{transform:translate(-50%,-50%) scale(1.12) rotate(3deg);opacity:1}28%{transform:translate(-50%,-50%) scale(1) rotate(0)}80%{opacity:1}to{opacity:0;transform:translate(-50%,-68%) scale(1)}}.confetti{position:absolute;top:-48px;will-change:transform;animation-name:confettiFall;animation-timing-function:linear;animation-iteration-count:1}@keyframes confettiFall{0%{transform:translateY(-48px) rotate(0);opacity:1}to{transform:translateY(106vh) rotate(600deg);opacity:1}}.question-list,.session-list{list-style:none;padding:0;margin:0}.empty{text-align:center;color:var(--muted);padding:30px 0}.question-body{margin:0 0 10px;white-space:pre-wrap;word-break:break-word}.question-meta{display:flex;align-items:center;gap:12px;font-size:.85rem;color:var(--muted)}.question-meta .nickname{font-weight:600;color:var(--text)}.question-meta .time{margin-left:auto;font-size:.78rem}.like-btn{background:#fff;color:var(--danger);border:1px solid var(--border);padding:4px 12px;margin-left:auto}.like-btn.liked{background:#fee2e2;border-color:#fecaca}.banner,.tag{background:#fef3c7;color:#92400e}.banner{padding:10px 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button.danger{background:#fff;color:var(--danger);border-color:#fecaca}.session-card{display:flex;gap:14px;align-items:flex-start;justify-content:space-between}.session-info{flex:1;min-width:0}.session-name{font-weight:700;display:flex;align-items:center;gap:8px}.status{font-size:.72rem;padding:2px 8px;border-radius:999px}.status.open{background:#dcfce7;color:#166534}.status.closed{background:#f3f4f6;color:var(--muted)}.session-sub{font-size:.85rem;color:var(--muted)}.qr-url{font-size:.75rem;word-break:break-all;margin:6px 0}.session-actions{display:flex;gap:8px;margin-top:8px}.session-actions button{background:#fff;color:var(--text);border:1px solid var(--border);padding:6px 12px;font-size:.85rem}.session-actions button.danger{color:var(--danger);border-color:#fecaca}.qr{width:110px;height:110px;border-radius:8px;border:1px solid var(--border)}