@import url('https://fonts.googleapis.com/css2?family=Roboto+Flex:opsz,wght@8..144,100..1000&display=swap');

:root{--blue:#1769d1;--blue-dark:#0f4fa6;--ink:#172033;--muted:#64748b;--line:#dbe3ef;--bg:#f4f7fb;--card:#fff;--green:#168760;--red:#c23737}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Roboto Flex",Arial,sans-serif;font-variation-settings:"opsz" 14}.auth-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:#fff}.login-card{width:min(100%,480px);display:flex;flex-direction:column;align-items:center;text-align:center}.login-logo{width:min(78vw,410px);height:auto;margin-bottom:38px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:0;border-radius:10px;padding:11px 17px;font:inherit;font-weight:700;cursor:pointer;transition:.18s transform,.18s background}.button:hover{transform:translateY(-1px)}.button:disabled{cursor:wait;opacity:.7}.button-primary{background:var(--blue);color:#fff}.button-primary:hover{background:var(--blue-dark)}.button-secondary{background:#eaf1fb;color:var(--blue-dark)}.button-danger{background:#fce9e8;color:#a62d2d}.button-wide{width:min(100%,320px);min-height:48px;border:1px solid #d5dce6;background:#fff;color:#273142;box-shadow:0 2px 5px #1d29390f}.button-wide:hover{background:#f8fafc}.google-icon{width:20px;height:20px}.error-message{min-height:1.5em;margin:15px 0 0;color:#c5221f;font-size:.88rem;font-weight:650}.app-shell{min-height:100vh}.topbar{display:flex;align-items:center;gap:18px;padding:14px max(20px,calc((100% - 1240px)/2));background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-size:1.05rem;font-weight:800;white-space:nowrap}.header-logo{width:32px;height:32px;object-fit:contain}.navigation{display:flex;gap:5px;flex:1}.navigation a{padding:8px 10px;border-radius:8px;color:var(--muted);text-decoration:none;font-size:.92rem;font-weight:700}.navigation a:hover,.navigation a.active{background:#edf4ff;color:var(--blue-dark)}.account{display:flex;align-items:center;gap:10px;margin-left:auto}.account-email{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:.8rem}.button-small{padding:7px 10px;border-radius:8px;font-size:.82rem}.page{width:min(100% - 32px,1180px);margin:0 auto;padding:34px 0 48px}.page-heading{margin-bottom:25px}.page-heading h1{margin:0 0 5px;font-size:clamp(1.55rem,3vw,2.1rem);line-height:1.2}.page-heading p{margin:0;color:var(--muted)}.resource-grid,.metrics-grid{display:grid;gap:16px}.resource-grid{grid-template-columns:repeat(3,1fr)}.resource-card,.panel-card,.metric-card{background:var(--card);border:1px solid var(--line);border-radius:15px;box-shadow:0 5px 14px #293d5310}.resource-card{display:flex;flex-direction:column;padding:23px;text-decoration:none;color:var(--ink)}.resource-card:hover{border-color:#9cc4fa;box-shadow:0 9px 20px #293d5318}.resource-icon{display:grid;place-items:center;width:42px;height:42px;margin-bottom:18px;border-radius:12px;background:#e9f2ff;color:var(--blue);font-size:1.3rem;font-weight:800}.resource-card h2{margin:0 0 6px;font-size:1.15rem}.resource-card p{margin:0;color:var(--muted);font-size:.92rem}.resource-card span:last-child{margin-top:18px;color:var(--blue);font-size:.9rem;font-weight:800}.panel-card{padding:20px}.workspace-bar{display:flex;gap:15px;align-items:center;justify-content:space-between;margin-bottom:18px}.workspace-bar h2{margin:0;font-size:1.15rem}.workspace-bar p{margin:2px 0 0;color:var(--muted);font-size:.88rem}.class-select{min-width:110px;padding:9px 32px 9px 11px;border:1px solid #b9c9dc;border-radius:9px;background:#fff;color:var(--ink);font:inherit;font-weight:700}.upload-row{display:flex;align-items:center;gap:12px;margin-bottom:18px;padding:13px;border:1px dashed #aec3dd;border-radius:11px;background:#f9fbfe}.upload-row p{margin:0;flex:1;color:var(--muted);font-size:.88rem}.status{min-height:1.4em;margin:0 0 13px;color:var(--green);font-size:.88rem;font-weight:700}.student-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;padding:0;margin:0;list-style:none}.student-list li{display:flex;gap:9px;align-items:center;padding:11px;border:1px solid #e0e7f0;border-radius:9px;background:#fff;font-weight:650}.student-list li::before{content:"";width:9px;height:9px;border-radius:50%;background:#4aa6ef}.empty-state{padding:36px 20px;text-align:center;color:var(--muted);border:1px dashed #b7c8dc;border-radius:11px}.map-toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px}.map-toolbar .status{margin:0}.room-map{position:relative;min-height:620px;overflow:auto;border:1px solid #cfdceb;border-radius:14px;background-color:#fbfdff;background-image:radial-gradient(#d9e2ee 1px,transparent 1px);background-size:20px 20px;touch-action:none}.teacher-desk{position:absolute;top:22px;left:50%;transform:translateX(-50%);padding:8px 26px;border-radius:7px;background:#29364a;color:#fff;font-size:.76rem;font-weight:800;letter-spacing:.08em}.desk{position:absolute;display:grid;place-items:center;width:124px;height:72px;padding:7px;border:2px solid var(--blue);border-radius:10px;background:#fff;color:#26364d;box-shadow:0 4px 8px #233a5418;cursor:grab;font-size:.77rem;font-weight:700;text-align:center;user-select:none;touch-action:none}.desk:active{cursor:grabbing;box-shadow:0 9px 18px #233a5430}.metrics-grid{grid-template-columns:repeat(3,1fr);margin-bottom:18px}.metric-card{padding:20px}.metric-card strong{display:block;margin-top:6px;font-size:2rem;line-height:1;color:var(--blue)}.metric-card span{color:var(--muted);font-size:.9rem;font-weight:650}.history-list{padding:0;margin:0;list-style:none}.history-list li{padding:12px 0;border-bottom:1px solid #e6edf5;font-size:.91rem}.history-list li:last-child{border:0}.history-list time{display:block;margin-top:2px;color:var(--muted);font-size:.78rem}.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:760px){.topbar{flex-wrap:wrap;gap:10px;padding:12px 16px}.navigation{order:3;width:100%;overflow:auto}.navigation a{flex:1;text-align:center}.account-email{max-width:120px}.page{width:min(100% - 24px,1180px);padding-top:24px}.resource-grid,.metrics-grid{grid-template-columns:1fr}.workspace-bar{align-items:flex-start;flex-direction:column}.class-select{width:100%}.upload-row{align-items:flex-start;flex-wrap:wrap}.room-map{min-height:540px}.desk{width:112px;height:68px}.login-card{padding:24px}.login-logo{width:min(88vw,360px);margin-bottom:30px}}