:root{--ink:#142439;--muted:#68788d;--green:#166d5c;--bg:#f3f6f9;--line:#dce4ec}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,-apple-system,sans-serif}a{color:var(--green);text-decoration:none}button,input,textarea{font:inherit}.topbar{height:82px;padding:0 4%;display:flex;align-items:center;gap:40px;border-bottom:1px solid var(--line);background:white}.brand{font-size:24px;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:8px}.brand>span:last-child{font-weight:400}.mark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--green);color:white}.topbar nav{display:flex;gap:24px;font-size:14px}.account{margin-left:auto;font-size:13px;color:var(--muted)}.container{max-width:1280px;margin:48px auto;padding:0 30px}.narrow{max-width:700px}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--green);font-weight:800}h1{font-size:36px;line-height:1.2;letter-spacing:-1px;margin:14px 0}h2{font-size:21px;line-height:1.3}p{color:var(--muted)}.heading{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:36px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:25px}.card{max-width:420px;background:white;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 8px 25px #14243906}.cover{width:100%;height:235px;object-fit:contain;background:#e8eeed;padding:12px}.card-body{padding:25px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);background:white;color:var(--ink);padding:10px 16px;border-radius:9px;font-weight:600;font-size:14px;cursor:pointer}.button:disabled{opacity:.45;cursor:default}.primary{background:var(--green);color:white;border-color:var(--green)}.text-button{border:0;background:none;color:var(--muted);padding:14px 0;cursor:pointer}.panel{background:white;border:1px solid var(--line);padding:28px;border-radius:16px}.columns{display:grid;grid-template-columns:1fr 360px;gap:30px;margin-top:30px;align-items:start}.thumbnails{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.thumbnails img{width:100%;border:1px solid var(--line)}.thumbnails span{display:block;text-align:center;font-size:12px}.session{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:20px;background:white;border-bottom:1px solid var(--line)}small{display:block;color:var(--muted)}label{display:block;font-size:14px;font-weight:600;margin:12px 0 6px}input,textarea{width:100%;padding:12px;border:1px solid #becad6;border-radius:8px;background:white}input[type=file]{font-size:13px}.error,.errorlist{color:#b53232}.room-layout{padding:28px 3%;display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:25px}.room-heading{display:flex;align-items:center;justify-content:space-between;gap:15px}.room-heading h1{font-size:24px}.status{font-size:12px;border-radius:20px;background:#e0eee9;color:var(--green);padding:7px 12px;white-space:nowrap}.stage{position:relative;display:flex;align-items:center;justify-content:center;background:#172331;border-radius:15px;min-height:300px;height:calc(100vh - 250px);overflow:hidden}.stage>img{width:100%;height:100%;object-fit:contain}.stage:fullscreen{height:100vh;border-radius:0}.video-tile{position:absolute;bottom:18px;right:18px;width:23%;min-width:120px;max-width:240px;aspect-ratio:4/3;border:2px solid #ffffff80;border-radius:12px;background:#253547;overflow:hidden;box-shadow:0 8px 25px #0004}.video-tile video{width:100%;height:100%;object-fit:cover}.video-tile>span{position:absolute;bottom:0;left:0;right:0;background:#0009;color:white;padding:5px 8px;font-size:10px}.controls{display:flex;align-items:center;justify-content:center;gap:15px;margin-top:18px;flex-wrap:wrap}.room-sidebar{padding-top:10px}.room-sidebar .panel{padding:22px;margin-bottom:18px}.room-sidebar .button{width:100%;margin-top:10px}.room-sidebar p{font-size:13px}.qr{display:block;width:155px;margin:15px auto}.danger{color:#b53232}.empty{padding:40px}.room-sidebar h2{font-size:19px}@media(max-width:1000px){.room-layout,.columns{grid-template-columns:1fr}.room-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:15px}.stage{height:65vh}.topbar{gap:20px}.account{display:none}}@media(max-width:600px){.topbar{height:auto;min-height:70px;flex-wrap:wrap;padding:14px 20px;gap:10px}.topbar nav{gap:15px;font-size:12px}.brand{font-size:20px}.container{padding:0 18px;margin:30px auto}.heading{align-items:start;flex-direction:column}h1{font-size:29px}.room-layout{padding:16px}.room-sidebar{display:block}.room-heading{flex-wrap:wrap}.stage{height:55vh;min-height:220px}.video-tile{min-width:100px;right:8px;bottom:8px}.controls{gap:8px}.button{padding:9px 11px}.thumbnails{grid-template-columns:repeat(2,1fr)}}
/* Nexus Lab 1.1: controles dentro de la superficie de pantalla completa. */
[hidden]{display:none!important}.stage-toolbar{display:none;position:absolute;bottom:12px;left:50%;transform:translateX(-50%);z-index:5;align-items:center;justify-content:center;gap:10px;padding:10px 12px;border-radius:14px;background:#142439ed;color:white;box-shadow:0 6px 24px #0005;max-width:calc(100% - 24px)}.stage:fullscreen .stage-toolbar{display:flex}.stage-toolbar .button{padding:8px 13px;white-space:nowrap}.stage-toolbar [data-page-label]{white-space:nowrap;font-size:14px}.video-tile{z-index:3;touch-action:none;user-select:none;cursor:grab}.video-tile.dragging{cursor:grabbing}.video-tile video{position:absolute;inset:0;pointer-events:none}.camera-handle{position:absolute;top:0;left:0;right:0;z-index:1;width:100%;border:0;background:#142439b8;color:white;font-size:11px;line-height:1.4;padding:5px 8px;text-align:left;cursor:grab;touch-action:none}.camera-handle:focus-visible{outline:3px solid #6cd9bf;outline-offset:-3px}.participants-panel{position:absolute;top:12px;right:12px;z-index:6;width:340px;max-width:calc(100% - 24px);max-height:calc(100% - 100px);padding:20px;border:1px solid var(--line);border-radius:14px;background:white;box-shadow:0 10px 35px #0005;color:var(--ink);overflow:auto}.participants-panel header{display:flex;align-items:center;justify-content:space-between;gap:8px}.participants-panel h2{margin:0;font-size:18px}.participants-panel ul{list-style:none;margin:0;padding:0}.participants-panel li{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.participant-dot{width:8px;height:8px;background:#27856b;border-radius:50%;flex-shrink:0}.participant-info{min-width:0;overflow-wrap:anywhere}.participant-info strong{font-size:14px}.participant-info small{font-size:11px}.presence-note{font-size:12px}.stage:fullscreen .participants-panel{max-height:calc(100% - 100px)}@media(max-width:600px){.stage-toolbar{gap:6px;padding:8px;width:max-content}.stage-toolbar .button{font-size:12px;padding:8px}.stage-toolbar [data-page-label]{font-size:12px}.camera-handle{font-size:9px;padding:4px}.video-tile>span{font-size:9px}}
/* 1.1.1: una sola línea de controles, sin amontonamientos. */
.controls{flex-wrap:nowrap;justify-content:flex-start;gap:12px;overflow-x:auto;max-width:100%;padding:2px 2px 8px;scrollbar-width:thin}
.controls>*{flex-shrink:0;white-space:nowrap}
.controls>:first-child{margin-left:auto}
.controls>:last-child{margin-right:auto}
.stage-toolbar{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin}
.stage-toolbar>*{flex-shrink:0;white-space:nowrap}
@media(max-width:600px){.controls{gap:8px}.controls>:first-child{margin-left:0}.stage-toolbar{justify-content:flex-start}}
.stage-column{min-width:0}

/* 1.2: inicio propio y errores visibles en pantalla completa. */
.runtime-status{font-size:11px;color:var(--muted)}
.stage-error{position:absolute;left:12px;right:12px;bottom:88px;z-index:7;margin:0;padding:12px;background:#fff0ed;border:1px solid #d48376;border-radius:8px;color:#8c241d;font-size:14px}
.stage-error:empty{display:none}
.home-hero{max-width:850px;margin:65px auto 35px;text-align:center}
.home-hero h1{font-size:clamp(36px,6vw,60px);letter-spacing:-2px}
.home-hero p{font-size:19px;max-width:650px;margin:22px auto}
.home-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;max-width:950px;margin:35px auto}
.home-card{padding:32px;background:white;border:1px solid var(--line);border-radius:20px}
.home-card h2{font-size:25px}.home-card .button{margin-top:14px}
.home-footer{text-align:center;font-size:13px;margin:40px 0}
@media(max-width:600px){.home-grid{grid-template-columns:1fr}.home-hero{margin-top:35px}.home-card{padding:24px}.room-heading{flex-wrap:wrap}.runtime-status{margin-left:auto}}