:root{--bg: #f4f5f7;--panel: #ffffff;--ink: #1e1e1e;--muted: #5c6370;--line: #dfe2e6;--accent: #6741d9;font-family:Nunito,system-ui,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body{margin:0;height:100%}#app{display:grid;grid-template-rows:auto 1fr auto auto;height:100vh}header{display:flex;align-items:center;gap:16px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--line)}header .title{font-weight:700;font-size:17px}select,button{font:inherit}header select{margin-left:auto;padding:4px 8px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}#stage{position:relative;min-height:0;background:#fff;user-select:none;-webkit-user-select:none}#stage svg{position:absolute;inset:0;width:100%;height:100%;display:block}#subtitle{min-height:56px;display:flex;align-items:center;gap:12px;padding:8px 16px;background:var(--panel);border-top:1px solid var(--line)}#subtitle 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textarea.edit{user-select:text;-webkit-user-select:text;position:absolute;z-index:3;margin:0;padding:0 4px;border:1px dashed var(--accent);border-radius:4px;outline:none;background:#ffffffeb;color:var(--ink);resize:none;overflow:hidden;white-space:pre}@media(max-width:640px){#tools{top:6px;gap:0;padding:2px}#tools button{min-width:28px;height:28px;font-size:14px}}#tools details.layers{position:relative}#tools details.layers summary{list-style:none;height:32px;padding:0 8px;border-radius:7px;cursor:pointer;font-size:13px;line-height:32px;color:var(--muted)}#tools details.layers summary::-webkit-details-marker{display:none}#tools details.layers[open] summary{background:#f3f0ff;color:var(--ink)}#tools details.layers .menu{position:absolute;top:38px;right:0;z-index:4;display:grid;gap:6px;min-width:230px;padding:10px 12px;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:0 6px 20px #0000001f;font-size:14px}#tools details.layers 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img{width:48px;height:36px;object-fit:cover;border-radius:4px;border:1px solid var(--line)}#nl-list .src .name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}#nl-list .src .size{color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}#nl-list .src.text{grid-template-columns:1fr auto}#nl-list .src.text textarea{grid-column:1 / -1}#nl-list .src .tname{padding:4px 8px!important;font-size:14px!important;font-weight:600!important;border-color:transparent!important;background:transparent!important}#nl-list .rm{width:28px;height:28px;border:none;border-radius:6px;background:none;color:var(--muted);cursor:pointer}#nl-list .rm:hover{background:#fff5f5;color:#c92a2a}#nl .add{align-self:flex-start;padding:6px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;font-size:14px}#nl .add:hover{border-color:var(--accent);color:var(--accent)}#nl .row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}#nl .primary{padding:10px 20px;border:none;border-radius:9px;background:var(--accent);color:#fff;font-size:16px;cursor:pointer}#nl .primary:disabled{opacity:.45;cursor:default}#nl .error{margin:0;padding:10px 12px;border-radius:8px;background:#fff5f5;color:#c92a2a;font-size:14px;line-height:1.45}#nl .error[hidden],#nl .banner[hidden]{display:none}#nl .banner{padding:10px 12px;border-radius:8px;background:#fff9db;font-size:14px;line-height:1.45}@media(max-width:640px){#nl .opts{grid-template-columns:1fr}}.prep-tag{padding:2px 10px;border-radius:10px;background:#fff3bf;color:#8f5b00;font-size:12px;font-weight:700;animation:prep-pulse 1.6s ease-in-out infinite}.prep-tag.ready{background:#d3f9d8;color:#2b8a3e;animation:none}@keyframes prep-pulse{50%{opacity:.55}}header .prep-tag+#room{margin-left:auto}.prep-foot{min-height:44px}#prep{position:absolute;right:16px;bottom:16px;z-index:3;width:min(340px,calc(100% - 32px));padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:var(--panel);box-shadow:0 6px 24px #0000001f}#prep h3{margin:0 0 10px;font-size:16px}#prep .bar{height:6px;border-radius:3px;background:#f1f3f5;overflow:hidden}#prep .bar i{display:block;height:100%;width:3%;background:var(--accent);transition:width .6s ease}#prep .stages{margin:12px 0 0;padding:0;list-style:none;font-size:14px;line-height:1.9;color:var(--muted)}#prep .stages li:before{content:"○";display:inline-block;width:1.4em}#prep .stages li.done{color:var(--ink)}#prep .stages li.done:before{content:"✓";color:#2b8a3e}#prep .stages li.now{color:var(--ink);font-weight:700}#prep .stages li.now:before{content:"●";color:var(--accent);animation:prep-pulse 1.2s ease-in-out infinite}#prep .time{margin:8px 0 0;color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}#prep .row{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}#prep button{padding:6px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);cursor:pointer;font-size:14px}#prep button.primary{border:none;background:var(--accent);color:#fff;font-size:15px}#prep .err{margin:0;color:#c92a2a;font-size:14px;line-height:1.45;overflow-wrap:anywhere}#prep .hint{margin:8px 0 0;line-height:1.45}#prep.ready{border-color:#8ce99a;box-shadow:0 0 0 4px #ebfbee,0 6px 24px #0000001f}#prep.ready h3{color:#2b8a3e;font-size:18px}#prep.ready .ask{margin:0;font-size:17px}#prep.stopped{border-color:#ffc9c9}#room-panel .delete-room{display:flex;gap:10px;align-items:flex-start;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}#room-panel .delete-room .hint{font-size:12px;line-height:1.4}button.danger{color:#c92a2a;border-color:#ffa8a8;background:#fff5f5;white-space:nowrap}button.danger:hover{background:#ffe3e3}#drawings-tip{position:absolute;top:56px;left:50%;transform:translate(-50%);z-index:6;display:flex;gap:10px;align-items:center;padding:8px 10px 8px 14px;border:1px solid var(--line);border-radius:10px;background:var(--panel);box-shadow:0 6px 20px #0000001f;font-size:14px;white-space:nowrap}#drawings-tip [data-act=close]{border:none;background:none;font-size:18px;color:var(--muted);padding:0 4px}#drawings-tip button.primary{border:none;border-radius:7px;background:var(--accent);color:#fff;padding:5px 12px}#admin-form{display:flex;gap:8px;margin:16px 0 8px}#admin-form input{flex:1;min-width:0;padding:9px 12px;border:1px solid var(--line);border-radius:8px;font:inherit}#admin-page .primary{border:none;border-radius:8px;background:var(--accent);color:#fff;padding:9px 18px;text-decoration:none;display:inline-block}#admin-page .err{color:#c92a2a}#lessons{list-style:none;padding:0;margin:16px 0;display:flex;flex-direction:column;gap:8px}#lessons li{display:flex;flex-direction:column;gap:2px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}#lessons li a{color:inherit;text-decoration:none}#lessons li a:hover b{color:var(--accent)}#lessons li span{font-size:13px;color:var(--muted)}