:root{--bg:#0b0d11;--panel:#12151c;--line:#262c37;--muted:#929dae;--text:#edf1f8;--lime:#b9f76b;--orange:#fc836a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:12px system-ui,"Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--line);background:#1b202a;color:var(--text);border-radius:6px;padding:7px 10px}button:hover{border-color:var(--lime)}button:disabled{cursor:not-allowed;opacity:.45}a{color:var(--lime);text-decoration:none}:focus-visible{outline:2px solid var(--lime);outline-offset:2px}.studio{height:100dvh;display:flex;flex-direction:column}.topbar{height:56px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-bottom:1px solid var(--line)}.topbar b{font-size:14px}.topbar small{font-size:11px;color:var(--muted);margin-left:18px;font-weight:400}nav{display:flex;align-items:center;gap:16px;font-size:11px;color:var(--muted)}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 338px;gap:16px;padding:16px;min-height:0;flex:1}.broadcast{min-width:0;display:flex;flex-direction:column;min-height:0}.screen{position:relative;background:#030405;flex:1;min-height:260px;overflow:hidden;border:1px solid var(--line);border-radius:10px 10px 0 0;display:grid;place-items:center}.screen video{position:absolute;width:100%;height:100%;object-fit:contain;object-position:center}.screen-empty{display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--muted);text-align:center}.screen-empty b{font-weight:500;font-size:16px;color:var(--text)}.screen-empty strong{font-size:56px;color:var(--lime);margin-bottom:10px}.screen-hud{position:absolute;top:15px;left:15px;right:15px;display:flex;justify-content:space-between;pointer-events:none;font:10px monospace}.screen-hud span{padding:6px 9px;background:#0b0d11b0;border-radius:4px}.screen-caption{padding:10px 14px;display:flex;align-items:center;justify-content:space-between;background:var(--panel);border:1px solid var(--line);border-top:0;border-radius:0 0 10px 10px;font-size:11px;gap:10px}.screen-caption button{font-size:11px}#chunkText{color:var(--muted);font-size:10px;padding:0 2px}.activity{background:var(--panel);border:1px solid var(--line);border-radius:8px;height:128px;flex-shrink:0;padding:10px 12px}.activity header,.control header{display:flex;justify-content:space-between;align-items:center;font-size:11px}.activity button{padding:2px 6px;font-size:10px}.events{height:80px;overflow:auto;padding-top:8px}.event{display:grid;grid-template-columns:45px minmax(0,1fr);gap:2px 8px;margin-bottom:8px;overflow-wrap:anywhere;font-size:11px}.event span{color:var(--lime);font-size:10px}.event b{font-weight:500}.event small{grid-column:2;color:var(--muted)}.control{overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px;scrollbar-width:thin}.control header{margin-bottom:18px}#sessionPill{font:10px monospace;color:var(--lime);background:#b9f76b12;padding:5px 8px;border-radius:5px}fieldset{border:0;padding:0;margin:0 0 12px;min-width:0}legend{font-size:11px;color:var(--lime);padding:0;margin-bottom:12px}label{display:block;font-size:11px;color:#b9c2d0;margin-bottom:12px}input,textarea,select{display:block;width:100%;background:#0c1016;color:var(--text);border:1px solid var(--line);border-radius:5px;padding:9px;margin-top:6px;line-height:1.55}textarea{resize:vertical;min-height:65px}fieldset:disabled{opacity:.5}.row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.primary{width:100%;background:var(--lime);color:#15220b;font-weight:600;border-color:transparent;padding:10px}.primary.active{background:#38211d;color:#ffb9a8;border-color:#714239}.hint{color:var(--muted);font-size:10px;line-height:1.6;margin:8px 0 16px}details{border-top:1px solid var(--line);margin:5px 0 12px}summary{cursor:pointer;font-size:11px;padding:12px 0;color:#dce4f1}.reference{font-size:10px;color:var(--muted);line-height:1.7}.reference pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:10px}.screen:fullscreen{border:0;border-radius:0;width:100vw;height:100vh}.screen:fullscreen .screen-hud{display:none}.eyebrow{font-size:10px;letter-spacing:.12em;color:var(--lime)}@media(min-width:1700px){.workspace{grid-template-columns:minmax(0,1fr) 360px}}@media(max-width:900px){.studio{height:auto;min-height:100dvh}.workspace{grid-template-columns:1fr}.screen{aspect-ratio:16/9;flex:none;min-height:0}.control{overflow:visible}.topbar small{display:none}.topbar{padding:0 12px}nav{gap:8px;font-size:10px}.topbar b{font-size:12px}}

.upload-control{margin:-6px 0 16px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}.upload-control input[hidden],.upload-control img[hidden]{display:none}.upload-status{font-size:10px;color:var(--muted);flex:1}.upload-control img{width:100%;max-height:130px;object-fit:contain;background:#090b0e;border-radius:5px}.upload-control button{font-size:11px}
/* Image material cards */
.upload-control{display:block;margin:0 0 14px;padding:12px;border:1px solid #29323d;border-radius:10px;background:linear-gradient(145deg,#161d26,#11161d)}
.upload-control [hidden]{display:none!important}.upload-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;font-size:11px;color:#e2e9f3}.upload-tag{font-size:9px;color:#83929f;background:#24303b;border-radius:4px;padding:3px 6px}
.upload-control .upload-drop{display:block;position:relative;width:100%;padding:0;min-height:138px;border:1px dashed #3a4958;border-radius:7px;background:#0d131a;overflow:hidden;text-align:center;color:#96aabd}
.upload-drop:hover,.is-dragging .upload-drop{border-color:var(--lime);background:#17221a;color:var(--lime)}.upload-empty{display:flex;flex-direction:column;align-items:center;gap:8px;padding:18px 6px}.upload-symbol{display:grid;place-items:center;width:42px;height:42px;border:1px solid #314238;border-radius:12px;background:#b9f76b09;color:var(--lime);margin-bottom:2px}.upload-empty b{font-size:11px;font-weight:500;color:#c4d1dc}.upload-empty small{font-size:9px;color:#71818f}
.upload-control .upload-drop img{display:block;width:100%;height:160px;max-height:none;border-radius:0;object-fit:contain;background:repeating-conic-gradient(#131b23 0% 25%,#19222c 0% 50%) 50%/16px 16px}.upload-preview-caption{position:absolute;bottom:0;left:0;right:0;background:#090e17c9;padding:7px;color:#d9e5ef;font-size:10px}
.upload-meta{display:flex;align-items:center;gap:8px;margin-top:8px}.upload-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#a8b9c9;font-size:10px}.upload-control .upload-remove{font-size:10px;padding:3px 7px;background:transparent;color:#b6c0cc}.upload-control .upload-remove:hover{color:#ffc1b2;border-color:#815043}
.upload-status{font-size:10px;line-height:1.6;color:#a8d98c;margin-top:8px;overflow-wrap:anywhere}.upload-error .upload-status{color:#ffb09b}.upload-error .upload-drop{border-color:#885141}.upload-link{margin:10px 0 0;border-top:1px solid #26313d}.upload-link summary{padding:9px 0 0;font-size:10px;color:#8d9eaf}.upload-link label{margin:10px 0 0;font-size:10px}.upload-link input{font-size:10px;padding:7px}.is-uploading .upload-drop{opacity:.6}.is-uploading .upload-status{color:#d5dfb5}fieldset:disabled .upload-drop{cursor:not-allowed}

.audio-upload audio{display:block;width:100%;height:36px;margin:10px 0 0;color-scheme:dark}.audio-upload .upload-symbol{font-size:24px}.audio-upload.has-image .upload-drop{min-height:0}.audio-upload.has-image .upload-empty{padding:8px}.audio-upload.has-image .upload-symbol,.audio-upload.has-image .upload-empty small{display:none}
.parameter-help{margin:-4px 0 14px;border:1px solid #293642;border-radius:6px;padding:0 9px;background:#0d141c}.parameter-help summary{font-size:10px;line-height:1.6;color:#9dacbc;padding:7px 0}.parameter-help[open] summary{color:var(--lime);border-bottom:1px solid #26323e;margin-bottom:9px}.parameter-help code{font-size:10px;color:#b9cde1;overflow-wrap:anywhere}.parameter-help p{font-size:11px;color:#a0afbf;line-height:1.8;margin:8px 0;overflow-wrap:anywhere}.parameter-help p b{font-weight:500;color:#d0dce8}.upload-control .parameter-help{margin:10px 0 0}.row>div{min-width:0}.row .parameter-help summary{font-size:9px}.reference>.parameter-help{margin:10px 0}fieldset:disabled .parameter-help{opacity:1}
.remote-dialog{width:min(440px,calc(100vw - 24px));max-height:90dvh;overflow:auto;border:1px solid #34433e;background:#12191f;color:var(--text);border-radius:16px;padding:22px;box-shadow:0 24px 100px #0008}.remote-dialog::backdrop{background:#000a}.remote-dialog header{display:flex;align-items:center;justify-content:space-between;gap:12px}.remote-dialog p{color:var(--muted);font-size:12px;line-height:1.8}.remote-status{color:var(--lime);font-size:12px;margin:16px 0}.remote-qr{display:block;width:240px;max-width:100%;height:auto;margin:18px auto;border-radius:10px}.remote-dialog [hidden]{display:none}.remote-url{display:block;text-align:center;font-size:11px;overflow-wrap:anywhere}.remote-actions{display:flex;gap:10px}.remote-actions .primary{flex:1}.remote-actions .revoke{flex-shrink:0}@media(max-width:600px){.topbar{height:auto;min-height:56px;flex-wrap:wrap;gap:10px;padding:12px}.topbar nav{flex-wrap:wrap}}
.demo-admin{border-top:1px solid var(--line);margin-top:28px;padding-top:18px}.demo-admin h2{font-size:19px}.demo-admin h3{font-size:14px}.demo-admin #demoStatus{color:var(--lime);overflow-wrap:anywhere}.demo-clip{padding:16px;border:1px solid var(--line);border-radius:10px;margin:16px 0}.demo-clip video{width:100%;max-height:220px;background:#000;margin-bottom:14px}.demo-clip input[type=checkbox]{width:auto}.admin .demo-clip button{margin-right:8px;font-size:12px}.admin .demo-clip .danger{background:#41261f;color:#ffc2b0}.demo-admin progress{width:100%;accent-color:var(--lime)}.demo-mode-banner{color:var(--lime);background:#25341f;padding:9px 14px;border-radius:7px;font-size:11px;margin:0 0 10px}



.admin button{color:#15220b}.admin .demo-clip .danger{color:#ffc2b0}

/* Preserve the full source image; the frame follows its intrinsic aspect ratio. */
.broadcast{overflow:auto;scrollbar-width:thin}.broadcast>*{flex-shrink:0}.screen{flex:0 0 auto;width:100%;height:auto;min-height:0;aspect-ratio:var(--video-ratio,16 / 9)}.screen:fullscreen{aspect-ratio:auto;width:100vw;height:100vh}.screen video{object-fit:contain}.screen-caption{flex-shrink:0}
/* One-screen stage layout: the viewport never scrolls; only the compact control rail scrolls. */
html,body{height:100%;overflow:hidden}.studio{height:100dvh;min-height:0;overflow:hidden}.workspace{min-height:0;height:calc(100dvh - 56px);overflow:hidden}.broadcast{min-height:0;overflow:hidden}.screen{flex:1 1 auto;min-height:0;height:auto;aspect-ratio:auto}.screen video{object-fit:contain;width:100%;height:100%}.control{min-height:0;overflow-y:auto;overscroll-behavior:contain}.broadcast-info{flex-shrink:0}.activity{flex:0 0 128px}.screen:fullscreen{width:100vw;height:100vh;aspect-ratio:auto}
@media(max-width:900px){html,body{overflow:auto}.studio{height:auto;min-height:100dvh;overflow:visible}.workspace{height:auto;overflow:visible}.broadcast{overflow:visible}.screen{aspect-ratio:16/9;flex:none}.control{overflow:visible}.activity{flex:0 0 128px}}

/* 2026 Guilin World Canals Conference palette */
:root{--bg:#091416;--panel:#102326;--line:#294346;--muted:#9aacab;--text:#eaf2ed;--lime:#72c7b4;--orange:#c6a36a}
button:hover{border-color:var(--lime)}a{color:#89d6c5}:focus-visible{outline-color:#c6a36a}
.topbar,.screen-caption,.activity,.control{border-color:var(--line)}
.topbar{background:#0b191b}.screen{border-color:#365254;background:#020809}.screen-empty strong,.event span,legend,.eyebrow{color:#c6a36a}
.screen-hud span{background:#0b191bd9;border:1px solid #55706b;color:#c3d8d0}
#sessionPill{color:#8de0cd;background:#72c7b418}.primary{background:#72c7b4;color:#08211f}.primary:hover{background:#8dd8c9}
#sendBtn{background:#c6a36a;color:#21190d}.primary.active{background:#492f28;color:#edb5a0;border-color:#9d6755}
input,textarea,select{background:#0b191b;border-color:#365254}summary{color:#cadad2}.parameter-help{background:#0c1a1c;border-color:#294346}.parameter-help[open] summary{color:#c6a36a}
.upload-control{border-color:#38504c;background:#122523}.upload-control .upload-drop{border-color:#506b63;background:#0b191b;color:#acd0c2}.upload-symbol{border-color:#577268;background:#c6a36a12;color:#c6a36a}
.demo-mode-banner{background:#203934;color:#c9e6d5}