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#1e2130;--skeleton-mid: #252838;--overlay-bg: rgba(0, 0, 0, .6);--overlay-heavy: rgba(0, 0, 0, .7);--shadow-card: 0 10px 30px rgba(0, 0, 0, .3);--shadow-drawer: 0 20px 60px rgba(0, 0, 0, .5);--shadow-modal: 0 20px 60px rgba(0, 0, 0, .5);--tg-bg: #1e2744;--tg-text: #60a5fa;--tg-hover: #252d4a;--chat-bg: #161922;--chat-theirs-bg: #1e2130;--chat-theirs-border: #2a2d3a;--chat-theirs-text: #e2e8f0;--msg-mine-bg: #2563eb;--msg-mine-text: #fff;--input-bg: #1e2130;--input-border: #333647;--autocomplete-hover: #1e2744;color-scheme:dark}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg-page)}a{color:inherit;text-decoration:none}button,input,select,textarea{font-family:inherit;color:inherit}#root{min-height:100vh}.app-shell{min-height:100vh;display:flex;flex-direction:column;background:var(--bg-page)}.topbar{display:flex;align-items:center;gap:16px;padding:16px 24px;background:var(--bg-surface);border-bottom:1px solid 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var(--border-secondary);background:var(--input-bg);resize:vertical}.agreement-backdrop{position:fixed;inset:0;background:var(--overlay-heavy);display:flex;align-items:center;justify-content:center;padding:24px;z-index:50}.update-backdrop{position:fixed;inset:0;background:#0f172aa6;display:flex;align-items:center;justify-content:center;padding:24px;z-index:60}.agreement-modal{width:min(90vw,760px);max-height:85vh;background:var(--bg-surface);border-radius:20px;padding:20px;box-shadow:var(--shadow-modal);display:flex;flex-direction:column;gap:16px}.update-modal{width:min(90vw,520px);background:var(--bg-surface);border-radius:20px;padding:20px;box-shadow:var(--shadow-modal);display:flex;flex-direction:column;gap:16px}.agreement-title,.update-title{font-weight:700;font-size:1.1rem}.agreement-body{background:var(--bg-surface-secondary);border:1px solid 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infinite}.skeleton-block.short{height:48px}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.admin-panel-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer;-webkit-user-select:none;user-select:none;padding:4px 0}.admin-panel-header:hover{opacity:.8}.admin-chevron{font-size:1.2rem;transition:transform .2s;color:var(--text-secondary)}.admin-chevron.open{transform:rotate(180deg)}.generate-btn{padding:12px 20px;border-radius:12px;border:none;background:var(--green);color:#fff;font-weight:700;cursor:pointer;font-size:.95rem}.generate-btn:disabled{background:var(--text-dimmed);cursor:not-allowed}.download-week-btn{width:100%;padding:12px 20px;margin-bottom:16px;border:none;border-radius:12px;background:var(--green-btn);color:#fff;font-weight:600;font-size:.95rem;cursor:pointer}.download-excel-btn{width:100%;padding:12px 20px;margin-bottom:16px;border:none;border-radius:12px;background:var(--green-excel);color:#fff;font-weight:600;font-size:.95rem;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:background .2s ease}.download-excel-btn:hover{background:var(--green-excel-hover)}.download-excel-btn:disabled{background:var(--text-dimmed);cursor:not-allowed}.download-week-btn:disabled{background:var(--text-dimmed);cursor:not-allowed}.teacher-search-bar{padding:10px 24px 12px;background:var(--bg-surface);border-bottom:1px solid var(--border-primary)}.teacher-search-toggle{display:flex;align-items:center;gap:8px;width:100%;padding:8px 0;border:none;background:none;cursor:pointer;font-size:.9rem;font-weight:600;color:var(--text-secondary)}.teacher-search-toggle:hover{color:var(--text-link)}.search-chevron{margin-left:auto;font-size:.8rem;transition:transform .2s;color:var(--text-dimmed)}.search-chevron.open{transform:rotate(180deg)}.teacher-search-input-wrap{display:flex;gap:8px}.teacher-search-input{flex:1;padding:10px 14px;border:1px solid var(--border-secondary);border-radius:12px;font-size:.95rem;outline:none;transition:border-color .15s;background:var(--input-bg)}.teacher-search-input:focus{border-color:var(--border-focus)}.teacher-search-btn{padding:10px 20px;border:none;border-radius:12px;background:var(--blue);color:#fff;font-weight:600;font-size:.95rem;cursor:pointer;white-space:nowrap}.teacher-search-btn:disabled{background:var(--text-dimmed);cursor:not-allowed}.teacher-search-results{display:grid;gap:8px;margin-top:10px}.teacher-search-result-item{border:1px solid var(--border-primary);border-radius:14px;padding:12px 16px;display:grid;gap:4px;background:var(--bg-inset)}.teacher-search-empty{margin-top:8px;padding:10px 14px;color:var(--text-secondary);font-size:.9rem}.groups-mobile-back{display:none}.groups-sidebar-title{margin:0}@media(max-width:1023px){.groups-mobile-back{display:flex;align-items:center;gap:12px;padding-bottom:8px}.groups-mobile-back button{display:flex;align-items:center;gap:4px;font-size:.85rem;padding:6px 12px}.groups-sidebar.has-selection .groups-sidebar-title,.groups-sidebar.has-selection .admin-bulk-actions,.groups-grid.mobile-hidden{display:none}}.groups-view-layout{display:flex;flex-direction:column;gap:24px}.groups-sidebar{background:var(--bg-surface);border-radius:20px;padding:20px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;gap:16px}.groups-main-area{display:flex;flex-direction:column;gap:24px}@media(min-width:1024px){.groups-view-layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:24px;align-items:start}.groups-sidebar{position:sticky;top:90px;max-height:calc(100vh - 110px);overflow-y:auto}.groups-sidebar .groups-grid{grid-template-columns:1fr}}.teacher-autocomplete-dropdown{position:absolute;top:100%;left:0;right:0;max-height:200px;overflow-y:auto;background:var(--bg-surface);border:1px solid var(--border-secondary);border-radius:10px;box-shadow:0 4px 12px #00000014;z-index:50;margin-top:4px}.teacher-autocomplete-item{padding:10px 14px;cursor:pointer;font-size:.9rem;border-bottom:1px solid var(--bg-surface-hover)}.teacher-autocomplete-item:last-child{border-bottom:none}.teacher-autocomplete-item:hover{background:var(--autocomplete-hover);color:var(--text-link)}.tutorial-overlay{position:fixed;inset:0;z-index:9999;pointer-events:auto}.tutorial-spotlight{position:fixed;z-index:10000;border-radius:12px;box-shadow:0 0 0 9999px #0009;transition:left .3s ease,top .3s ease,width .3s ease,height .3s ease;pointer-events:none}.tutorial-spotlight-clickable{pointer-events:auto;cursor:pointer}.tutorial-tooltip{position:fixed;z-index:10001;background:var(--bg-surface);border-radius:16px;padding:20px;max-width:340px;width:calc(100vw - 32px);box-shadow:0 8px 32px #0003;animation:tutorial-fade-in .25s ease}.tutorial-tooltip-center{top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes tutorial-fade-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.tutorial-tooltip-center{animation-name:tutorial-fade-in-center}@keyframes tutorial-fade-in-center{0%{opacity:0;transform:translate(-50%,-50%) scale(.95)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}.tutorial-progress{font-size:.75rem;color:var(--text-dimmed);margin-bottom:8px;font-weight:600;letter-spacing:.05em}.tutorial-content{font-size:.95rem;line-height:1.55;color:var(--text-primary);margin-bottom:16px}.tutorial-actions{display:flex;justify-content:space-between;align-items:center;gap:12px}.tutorial-btn{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:10px 24px;font-size:.9rem;font-weight:600;cursor:pointer;transition:background .15s}.tutorial-btn:hover{background:var(--accent-hover)}.tutorial-skip-btn{background:none;border:none;color:var(--text-dimmed);font-size:.85rem;cursor:pointer;padding:8px 12px;border-radius:8px;transition:color .15s,background .15s}.tutorial-skip-btn:hover{color:var(--text-secondary);background:var(--bg-surface-hover)}.tutorial-hint{margin-top:12px;padding-top:12px;border-top:1px solid var(--bg-surface-hover);font-size:.8rem;color:var(--accent);font-weight:500;display:flex;align-items:center;gap:6px}.tutorial-hint:before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);animation:tutorial-pulse 1.5s ease infinite}@keyframes tutorial-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.3)}}.theme-toggle{width:44px;height:24px;border-radius:999px;border:1px solid var(--border-secondary);background:var(--bg-surface-secondary);cursor:pointer;position:relative;padding:0;flex-shrink:0;transition:background .2s,border-color .2s}.theme-toggle:after{content:"";position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:var(--accent);transition:transform .2s}[data-theme=dark] .theme-toggle:after{transform:translate(20px)}.theme-toggle-icon{position:absolute;top:50%;transform:translateY(-50%);width:14px;height:14px;pointer-events:none}.theme-toggle-sun{left:4px;color:#f59e0b}.theme-toggle-moon{right:4px;color:#60a5fa}.favorite-star{position:absolute;top:6px;right:6px;background:none;border:none;cursor:pointer;font-size:1.3rem;color:var(--text-dimmed);padding:2px 4px;line-height:1;transition:color .15s,transform .15s;z-index:1}.favorite-star:hover{transform:scale(1.2);color:#f59e0b}.favorite-star.active{color:#f59e0b}.group-card{position:relative}.groups-divider{grid-column:1 / -1;text-align:center;font-size:.8rem;font-weight:600;color:var(--text-muted);padding:6px 0 2px;border-top:1px solid var(--border-primary);margin-top:4px;letter-spacing:.03em;text-transform:uppercase}