:root{--bg: #0d1117;--surface: #161b22;--surface2: #21262d;--border: #30363d;--accent: #2f81f7;--accent-dim: rgba(47, 129, 247, .14);--accent-glow: rgba(47, 129, 247, .25);--green: #3fb950;--green-dim: rgba(63, 185, 80, .14);--green-glow: rgba(63, 185, 80, .2);--red: #f85149;--red-dim: rgba(248, 81, 73, .14);--red-glow: rgba(248, 81, 73, .2);--yellow: #e3b341;--text: #e6edf3;--text-2: #cdd9e5;--text-muted: #7d8590;--text-dim: #484f58;--radius: 12px;--radius-lg: 20px;--shadow-sm: 0 4px 12px rgba(0, 0, 0, .3);--shadow-md: 0 10px 28px rgba(0, 0, 0, .35);--shadow-lg: 0 18px 40px rgba(0, 0, 0, .4);--shadow-xl: 0 22px 48px rgba(0, 0, 0, .5);--overlay: rgba(0, 0, 0, .7);--overlay-loading: rgba(13, 17, 23, .85);--warn-bg: rgba(227, 179, 65, .1);--warn-border: rgba(227, 179, 65, .3);--warn-text: #e3b341;--caution-bg: rgba(248, 132, 74, .1);--caution-border: rgba(248, 132, 74, .25);--caution-text: #fb8f44;--seat-bg: rgba(47, 129, 247, .14);--seat-hover: rgba(47, 129, 247, .22);--seat-setup-bg: rgba(47, 129, 247, .1);--seat-setup-border: rgba(47, 129, 247, .2);--seat-empty-bg: rgba(125, 133, 144, .18);--green-border: rgba(63, 185, 80, .3);--red-border: rgba(248, 81, 73, .3);--red-mid: rgba(248, 81, 73, .45);--progress-fill: linear-gradient(180deg, #4d9ef5 0%, #2f81f7 100%);--card-shimmer: rgba(47, 129, 247, .35);--avatar-gradient: linear-gradient(135deg, rgba(47, 129, 247, .25), #0d2847)}[data-theme=light]{--bg: #f2f2f7;--surface: #ffffff;--surface2: #f8fafc;--border: #e5e7eb;--accent: #2563eb;--accent-dim: #dbeafe;--accent-glow: rgba(37, 99, 235, .12);--green: #16a34a;--green-dim: #dcfce7;--green-glow: rgba(22, 163, 74, .12);--red: #dc2626;--red-dim: #fee2e2;--red-glow: rgba(220, 38, 38, .12);--yellow: #ca8a04;--text: #111827;--text-2: #374151;--text-muted: #6b7280;--text-dim: #9ca3af;--shadow-sm: 0 4px 12px rgba(15, 23, 42, .06);--shadow-md: 0 10px 28px rgba(15, 23, 42, .08);--shadow-lg: 0 18px 40px rgba(15, 23, 42, .1);--shadow-xl: 0 22px 48px rgba(15, 23, 42, .18);--overlay: rgba(0, 0, 0, .5);--overlay-loading: rgba(255, 255, 255, .85);--warn-bg: #fef9c3;--warn-border: #fde047;--warn-text: #854d0e;--caution-bg: #fff7ed;--caution-border: #fed7aa;--caution-text: #7c2d12;--seat-bg: #e5eefc;--seat-hover: #dbeafe;--seat-setup-bg: #eff6ff;--seat-setup-border: #dbeafe;--seat-empty-bg: rgba(107, 114, 128, .1);--green-border: #86efac;--red-border: #fca5a5;--red-mid: #fca5a5;--progress-fill: linear-gradient(180deg, #60a5fa 0%, #2563eb 100%);--card-shimmer: rgba(37, 99, 235, .25);--avatar-gradient: linear-gradient(135deg, #dbeafe, #bfdbfe)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:Noto Sans KR,Pretendard,sans-serif;min-height:100vh;transition:background-color .2s ease,color .2s ease}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(var(--card-shimmer) 1px,transparent 1px),linear-gradient(90deg,var(--card-shimmer) 1px,transparent 1px);background-size:40px 40px;pointer-events:none;z-index:0;opacity:.12;transition:opacity .2s ease}[data-theme=light] body:before{opacity:0}#root{position:relative;z-index:1}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay);display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--surface);padding:2rem;border-radius:var(--radius);border:1px solid var(--border);width:90%;max-width:400px}.page-wrap{position:relative;z-index:1;width:100%;max-width:480px;margin:0 auto;display:flex;flex-direction:column;gap:16px;padding:20px;min-height:100vh;align-items:stretch;justify-content:center}.site-header{text-align:center;padding-bottom:8px}.site-badge{display:inline-block;padding:5px 14px;border-radius:999px;border:1px solid var(--accent-dim);background:#2f81f71a;color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.08em;margin-bottom:12px}.site-title{font-family:Gmarket Sans,Noto Sans KR,sans-serif;font-size:26px;font-weight:700;color:var(--text);line-height:1.2;margin-bottom:6px}.site-sub{font-size:13px;color:var(--text-muted)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;position:relative;overflow:hidden}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--card-shimmer),transparent)}.form-group{display:flex;flex-direction:column;margin-bottom:14px;gap:10px}.form-label{font-size:12px;font-weight:700;color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:2px;display:block}.input-field{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:13px 16px;font-size:16px;font-family:Noto Sans 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var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}.loading-text{font-size:14px;color:var(--text-muted)}.result-card{display:flex;flex-direction:column;gap:16px;animation:fadeUp .3s ease}.student-info-header{display:flex;align-items:center;gap:14px}.student-avatar{width:52px;height:52px;border-radius:14px;background:var(--avatar-gradient);border:1px solid var(--accent-dim);display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900;color:var(--accent);flex-shrink:0}.student-meta{flex:1;min-width:0}.student-name-big{font-size:22px;font-weight:900;color:var(--text);line-height:1.1;margin-bottom:3px}.student-id-text{font-size:12px;color:var(--text-muted);font-weight:500}.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.info-tile{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:14px}.info-tile-label{font-size:11px;font-weight:700;color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px}.info-tile-value{font-size:18px;font-weight:800;color:var(--text);line-height:1.2}.status-display{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.status-label-text{font-size:12px;font-weight:700;color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px}.status-badge-big{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:999px;font-size:16px;font-weight:800}.status-badge-big.present{background:var(--green-dim);color:var(--green);border:1px solid rgba(63,185,80,.3)}.status-badge-big.absent{background:var(--red-dim);color:var(--red);border:1px solid rgba(248,81,73,.3)}.status-dot{width:8px;height:8px;border-radius:50%}.status-dot.present{background:var(--green);box-shadow:0 0 6px var(--green)}.status-dot.absent{background:var(--red);box-shadow:0 0 6px var(--red)}.reason-tag{display:inline-block;padding:4px 10px;border-radius:6px;background:#f851491f;color:#ffa198;font-size:12px;font-weight:700;margin-top:4px}.action-title{font-size:12px;font-weight:700;color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px}.action-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.action-btn{padding:14px;border:2px solid transparent;border-radius:var(--radius);font-size:15px;font-weight:800;font-family:Noto Sans KR,sans-serif;cursor:pointer;transition:all .18s 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var(--border);border-radius:6px;color:var(--text-muted)}.entry-badge{display:inline-block;padding:6px 12px;border-radius:999px;background:var(--accent-dim);color:var(--accent);font-size:13px;font-weight:700;margin-bottom:14px}.guide-btn{width:100%;padding:14px;border:none;border-radius:var(--radius);background:var(--surface2);color:var(--text-muted);font-size:14px;font-weight:700;cursor:pointer;margin-top:10px;margin-bottom:8px;font-family:Noto Sans KR,sans-serif}.guide-btn:hover{color:var(--text);background:var(--border)}.db-item-actions{display:flex;gap:6px;flex-shrink:0}.db-action-btn{padding:4px 8px;border-radius:6px;font-size:12px;font-weight:700;background:var(--surface2);border:1px solid var(--border);color:var(--text-muted);cursor:pointer;font-family:Noto Sans 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strong{display:block;font-size:13px;color:var(--text);margin-bottom:3px}.admin-seat-setup-side-item span{display:block;font-size:11px;color:var(--text-muted);line-height:1.4}.admin-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay);display:flex;align-items:center;justify-content:center;padding:20px;z-index:50;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.admin-history-modal{width:min(980px,calc(100vw - 36px));max-width:min(980px,calc(100vw - 36px));max-height:calc(100vh - 36px);background:var(--surface);border-radius:24px;padding:22px;box-shadow:var(--shadow-xl);border:1px solid var(--border);overflow:auto}.admin-history-modal-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.admin-history-modal-title{font-size:22px;font-weight:800;color:var(--text);margin:0}.admin-history-modal-close{width:38px;height:38px;border:1px solid var(--border);border-radius:12px;background:var(--surface2);color:var(--text-2);font-size:16px;cursor:pointer}.admin-history-layout{display:grid;grid-template-columns:260px 1fr;gap:16px;min-height:380px}.admin-history-list{border:1px solid var(--border);border-radius:16px;background:var(--surface2);padding:10px;overflow-y:auto;max-height:480px}.admin-history-empty{padding:16px;color:var(--text-muted);font-size:13px;text-align:center}.admin-history-item{width:100%;border:none;background:var(--surface);border-radius:12px;padding:12px;text-align:left;cursor:pointer;margin-bottom:6px;box-shadow:var(--shadow-sm);font-family:Noto Sans KR,sans-serif}.admin-history-item.active{background:var(--accent-dim);outline:2px solid var(--accent-dim)}.admin-history-item-time{font-size:13px;font-weight:800;color:var(--text)}.admin-history-item-sub{margin-top:3px;font-size:11px;font-weight:700;color:var(--text-muted)}.admin-history-preview{border:1px solid var(--border);border-radius:16px;background:var(--surface);padding:14px;display:flex;flex-direction:column;gap:10px;min-height:380px}.admin-history-preview-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.admin-history-preview-meta{font-size:13px;font-weight:700;color:var(--text-2)}.admin-history-preview-count{font-size:13px;font-weight:800;color:var(--accent)}.admin-history-preview-grid{display:flex;flex-direction:column;gap:5px}.admin-history-preview-row{display:flex;gap:6px}.admin-history-preview-pair{display:flex;gap:3px;flex:1}.admin-history-preview-seat{flex:1;min-height:60px;border-radius:10px;background:var(--seat-bg);padding:6px 5px;position:relative;display:flex;flex-direction:column;justify-content:space-between;text-align:center}.admin-history-preview-seat.absent{background:var(--red-dim)}.admin-history-preview-seat.vacant{background:var(--seat-empty-bg);opacity:.5}.admin-history-preview-seat.vacant .admin-history-preview-number{color:var(--text-muted)}.admin-history-preview-seat.vacant .admin-history-preview-name{color:var(--text-muted);font-weight:600}.admin-history-preview-number{font-size:10px;font-weight:800;color:var(--accent);text-align:left}.admin-history-preview-name{min-height:16px;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;color:var(--text)}.admin-history-preview-status{position:absolute;top:4px;right:4px;padding:1px 5px;border-radius:999px;font-size:8px;font-weight:800}.admin-history-preview-status.present{background:var(--green-dim);color:var(--green)}.admin-history-preview-status.absent{background:var(--red-dim);color:var(--red)}.admin-history-preview-placeholder{visibility:hidden;flex:1;min-height:60px;border-radius:10px}.admin-history-restore-button{width:100%;margin-top:auto;padding:14px;border:none;border-radius:12px;background:var(--accent);color:#fff;font-size:14px;font-weight:800;cursor:pointer;font-family:Noto Sans KR,sans-serif}.admin-history-restore-button:disabled{opacity:.4;cursor:not-allowed}.admin-custom-layout-modal{width:min(900px,calc(100vw - 36px));max-width:min(900px,calc(100vw - 36px));max-height:calc(100vh - 36px);background:var(--surface);border-radius:24px;padding:22px;box-shadow:var(--shadow-xl);border:1px solid var(--border);overflow:auto}.admin-import-room-modal{width:min(680px,calc(100vw - 36px));max-height:calc(100vh - 36px);background:var(--surface);border-radius:24px;padding:22px;box-shadow:var(--shadow-xl);border:1px solid var(--border);overflow:auto}.admin-import-room-target{padding:12px 14px;margin-bottom:16px;border-radius:14px;background:var(--surface2);border:1px solid var(--border);color:var(--text-muted);font-size:14px}.admin-import-room-target strong{color:var(--text)}.admin-import-room-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:12px}.admin-import-room-preview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:4px 0 16px}.admin-import-room-preview div{padding:14px;border:1px solid var(--seat-setup-border);border-radius:14px;background:var(--seat-setup-bg)}.admin-import-room-preview span{display:block;margin-bottom:4px;font-size:12px;font-weight:700;color:var(--text-muted)}.admin-import-room-preview strong{display:block;font-size:22px;color:var(--text)}.admin-import-room-confirm{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;border-radius:14px;background:var(--caution-bg);border:1px solid var(--caution-border);color:var(--caution-text);font-size:13px;font-weight:700;line-height:1.5}.admin-import-room-confirm input{margin-top:3px;flex:0 0 auto}.admin-toggle-switch{position:relative;display:inline-block;width:44px;height:24px;flex-shrink:0}.admin-toggle-switch input{opacity:0;width:0;height:0}.admin-toggle-slider{position:absolute;cursor:pointer;top:0;right:0;bottom:0;left:0;background:var(--border);transition:.3s;border-radius:24px}.admin-toggle-slider:before{position:absolute;content:"";height:18px;width:18px;left:3px;bottom:3px;background:#fff;transition:.3s;border-radius:50%;box-shadow:0 1px 3px #0000001a}.admin-toggle-switch input:checked+.admin-toggle-slider{background:var(--accent)}.admin-toggle-switch input:checked+.admin-toggle-slider:before{transform:translate(20px)}.admin-toggle-switch input:disabled+.admin-toggle-slider{opacity:.5;cursor:default}.admin-loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay-loading);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:16px;z-index:1000}.admin-loading-spinner{width:50px;height:50px;border:5px solid var(--accent-dim);border-top-color:var(--accent);border-radius:50%;animation:adminSpin 1s linear infinite}.admin-loading-text{font-size:18px;font-weight:800;color:var(--accent)}@keyframes adminSpin{to{transform:rotate(360deg)}}.admin-login-screen{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;background:var(--bg);padding:24px;gap:16px;overflow-y:auto}.admin-login-card{width:min(420px,calc(100vw - 32px));background:var(--surface);border-radius:24px;padding:36px 32px;box-shadow:var(--shadow-xl);border:1px solid var(--border);text-align:center;margin:auto 0}.admin-login-card h2{margin:0 0 8px;font-size:24px;font-weight:800;color:var(--text)}.admin-login-card p{margin:0 0 28px;font-size:14px;color:var(--text-muted);line-height:1.6}.admin-google-btn{width:100%;padding:14px 20px;border:1px solid var(--border);border-radius:14px;background:var(--surface);font-size:15px;font-weight:700;color:var(--text-2);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:all .15s;box-shadow:var(--shadow-sm);font-family:Noto Sans KR,sans-serif}.admin-google-btn:hover{background:var(--surface2)}.admin-google-btn:disabled{opacity:.5;cursor:not-allowed}.admin-login-error{margin:14px 0 0;font-size:13px;font-weight:700;color:var(--red);min-height:20px}.admin-viewer-mode-btn{width:100%;padding:12px 20px;border:1px solid var(--border);border-radius:14px;background:var(--surface2);font-size:14px;font-weight:700;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .15s;font-family:Noto Sans KR,sans-serif}.admin-viewer-mode-btn:hover{background:var(--border)}.admin-login-divider{margin:20px 0;padding-top:20px;border-top:1px solid var(--border)}.admin-login-divider p{margin:0 0 12px;font-size:13px;color:var(--text-dim)}.admin-dev-name-input{padding:4px 8px;font-size:16px;margin-bottom:8px;font-weight:800;width:100%;border:1px solid var(--border);border-radius:8px;outline:none;background:var(--surface);color:var(--text);font-family:Noto Sans KR,sans-serif}.admin-dev-name-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}@media(max-width:1280px),(max-height:980px){.admin-layout{grid-template-columns:minmax(0,1fr) 260px}.admin-seat-pair .admin-seat{min-height:82px;padding:7px}.admin-seat-name{font-size:13px}}@media(max-width:980px){.admin-student-input-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:860px){.admin-app{overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;align-items:flex-start}.admin-app-shell{margin:0 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linear}.admin-seat-progress-range{font-size:12px;white-space:nowrap}.admin-sidebar{height:auto}.admin-student-list-panel{max-height:40vh}.admin-student-grid-panel{height:auto;max-height:70vh}.admin-student-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}}@media(max-width:700px){.admin-student-input-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-import-room-grid,.admin-import-room-preview{grid-template-columns:1fr}}@media(max-width:560px){.admin-student-input-grid{grid-template-columns:1fr}.admin-seat-pair .admin-seat{min-height:74px}.admin-roster-actions{flex-direction:column}}@media(max-width:1100px){.admin-app-shell{width:1000px;max-width:1000px}.admin-time-card,.admin-phase-card{min-width:140px}.admin-home-button{width:42px;height:42px;font-size:17px}.admin-summary-card{min-width:84px;padding:8px 10px}}@media(max-width:920px){.admin-app-shell{width:900px;max-width:900px}}@media(max-width:800px){.admin-app-shell{width:780px;max-width:780px}.admin-time-card,.admin-phase-card{min-width:110px}.admin-home-button{width:38px;height:38px;font-size:15px}.admin-summary-card{min-width:68px;padding:6px 8px}.admin-summary-card .admin-value{font-size:16px}}@media(max-width:600px){.admin-app-shell{width:580px;max-width:580px}.admin-time-card,.admin-phase-card{min-width:92px}.admin-time-clock{font-size:18px}.admin-phase-value{font-size:16px}.admin-title-wrap h1{font-size:22px}.admin-title-actions{width:100%;flex-wrap:wrap}.admin-summary{width:100%;margin-left:0}}@media(max-width:480px){.admin-app-shell{width:460px;max-width:460px}.admin-time-card,.admin-phase-card{min-width:80px}.admin-time-clock{font-size:16px}.admin-phase-value{font-size:14px}.admin-phase-sub{font-size:10px}.admin-title-wrap h1{font-size:20px}.admin-summary-card{min-width:58px;padding:5px 7px}.admin-summary-card .admin-value{font-size:15px}.admin-title-area{flex-direction:column;align-items:flex-start;gap:8px}.admin-title-info{width:100%;flex:0 1 auto}.admin-title-actions{width:100%;flex-wrap:wrap}}@media(max-width:680px){.admin-history-layout{grid-template-columns:1fr;min-height:0}.admin-history-list{max-height:200px}.admin-history-preview{min-height:0}.admin-history-preview-grid{overflow-y:auto;max-height:220px}}@media(max-width:680px){.admin-seat-setup-layout{grid-template-columns:1fr}.admin-seat-setup-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:480px){.admin-entry-card{padding:20px 16px;border-radius:18px}.admin-roster-card{padding:18px 16px;border-radius:18px}.admin-entry-card h1,.admin-roster-card h1{font-size:24px}.admin-roster-top{flex-direction:column;gap:12px}.admin-roster-info{flex-wrap:wrap;gap:8px}}