:root {
  color-scheme: light;
  --fg: #1d1d1f; --muted: #6b6b70; --line: #d9d9de; --line-strong: #b9b9c0;
  --bg: #f7f7f8; --surface: #fff; --hover: #ececef;
  --accent: #1f5fbf; --accent-hover: #194f9f; --danger: #b42318; --ok: #1a7f37;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 15px; color: var(--fg); background: var(--bg);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); }
a { color: var(--accent); }
p { line-height: 1.6; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.icon {
  font-family: "Material Symbols Outlined"; font-weight: normal; font-style: normal;
  font-size: 20px; line-height: 1; letter-spacing: normal; text-transform: none; white-space: nowrap;
  display: inline-block; flex: none; direction: ltr; -webkit-font-smoothing: antialiased; user-select: none;
}

header { display: flex; align-items: center; gap: 12px; height: 48px; padding: 0 16px; border-bottom: 1px solid var(--line); background: var(--surface); }
header .brand { color: var(--fg); font-weight: 600; text-decoration: none; }
#page-label { color: var(--muted); font-size: .85rem; }
header .icon-link { text-decoration: none; margin-left: auto; color: var(--muted); display: inline-flex; padding: 6px; }
header .icon-link:hover { color: var(--fg); }

main { max-width: 720px; margin: 0 auto; padding: 20px 16px 48px; }
#home { max-width: 420px; margin: 24px auto 0; }
body[data-page="view"] main { max-width: 1100px; }
/* Keep the floating preview beside the panel when there is room for both. */
@media (min-width: 1100px) {
  body[data-page="control"] main { margin-left: max(0px, calc((100vw - 720px - 372px) / 2)); }
}

/* Controls */
label, .label { display: block; color: var(--muted); font-size: .85rem; }
label { margin: 0 0 12px; }
input, select, textarea, button, .button {
  font: inherit; font-size: 15px; color: var(--fg);
  border: 1px solid var(--line-strong); border-radius: 3px; background: var(--surface);
  min-height: 38px; padding: 7px 10px;
}
input, select, textarea { display: block; width: 100%; margin-top: 4px; }
textarea { resize: vertical; line-height: 1.5; }
input[readonly] { background: var(--bg); color: var(--muted); }
button, .button {
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  cursor: pointer; background: var(--surface); text-decoration: none; white-space: nowrap; user-select: none;
}
button:hover:not(:disabled), .button:hover { background: var(--hover); }
button:disabled { opacity: .45; cursor: default; }
.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.primary:hover:not(:disabled) { background: var(--accent-hover); }
.icon-button { border-color: transparent; background: transparent; padding: 6px; min-height: 0; color: var(--muted); }
.icon-button:hover:not(:disabled) { color: var(--fg); }
.icon-button.small { padding: 2px; }
.icon-button.small .icon { font-size: 18px; }

.file { position: relative; color: var(--fg); font-size: 15px; margin: 0; }
.file input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
.file:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.file:has(input:disabled) { opacity: .45; }
.file:has(input:disabled) input { cursor: default; }

.checkbox { display: inline-flex; align-items: center; gap: 6px; margin: 0; color: var(--fg); font-size: .9rem; }
.checkbox input { width: auto; min-height: 0; margin: 0; }

.actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.spacer { flex: 1; }
.muted { color: var(--muted); font-size: .85rem; }
.badge { font-size: .8rem; color: var(--danger); border: 1px solid currentColor; border-radius: 2px; padding: 1px 6px; }

.inline-input { display: flex; gap: 6px; align-items: stretch; margin-top: 4px; }
.inline-input > input, .inline-input > select, .inline-input > textarea { flex: 1; min-width: 0; margin: 0; }
.inline-input .narrow { flex: 0 0 5.5em; }
.inline-input > button, .inline-input > .button { padding: 0 9px; }

.time-input { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.time-input input { width: 6em; margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.time-input > span { color: var(--muted); font-size: .85rem; margin-right: 6px; }
.time-input button { margin-left: auto; }

#notice { margin: 0 0 16px; padding: 8px 12px; border-left: 3px solid var(--accent); background: var(--surface); overflow-wrap: anywhere; }
#notice[data-error="true"] { border-left-color: var(--danger); color: var(--danger); }

/* Home */
#create-form .field { margin-bottom: 12px; }
#create-form details { margin: 4px 0 16px; }
#create-form .actions { margin-top: 8px; }
#create-form .actions .primary { min-width: 8em; }
details.inline summary { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; color: var(--muted); font-size: .85rem; list-style: none; }
details.inline summary::-webkit-details-marker { display: none; }
details.inline summary .icon { font-size: 18px; }
details.inline[open] input { margin-top: 6px; }

/* Room */
.room-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.room-bar h1 { margin: 0; font-size: 1.25rem; font-weight: 600; overflow-wrap: anywhere; min-width: 0; }
#connection { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: .8rem; margin-left: auto; }
#connection::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); flex: none; }
#connection[data-offline="false"]::before { background: var(--ok); }
#connection[data-offline="true"] { color: var(--danger); font-weight: 600; }
#connection[data-offline="true"]::before { background: var(--danger); }

#display-frame { display: block; width: 100%; height: 320px; border: 1px solid var(--line); margin: 0; background: #fafafa; }
body[data-page="view"] #display-frame { height: 70vh; min-height: 300px; }
#preview-panel #display-frame:fullscreen { width: 100vw; height: 100vh; border: 0; background: #fafafa; }
#preview-panel[data-floating="true"] {
  position: fixed; right: 16px; top: 60px; width: min(340px, calc(100vw - 24px)); z-index: 10;
  background: var(--surface); border: 1px solid var(--line-strong);
}
#preview-handle { display: flex; align-items: center; justify-content: space-between; height: 28px; padding: 0 4px 0 10px; cursor: grab; touch-action: none; user-select: none; font-size: .8rem; color: var(--muted); border-bottom: 1px solid var(--line); }
/* Control preview: render at 1920x1080 and scale down to the box. */
body[data-page="control"] #preview-box { position: relative; aspect-ratio: 16 / 9; overflow: hidden; border: 1px solid var(--line); background: #fafafa; }
body[data-page="control"] #display-frame { position: absolute; left: 0; top: 0; width: 1920px; height: 1080px; border: 0; transform: scale(var(--preview-scale, .18)); transform-origin: 0 0; }
body[data-page="control"] #preview-panel #display-frame:fullscreen { position: static; width: 100vw; height: 100vh; transform: none; }
#preview-panel[data-floating="true"] #preview-box { border: 0; }
#preview-panel[data-dragging="true"] #preview-handle { cursor: grabbing; }
#preview-panel[data-dragging="true"] #display-frame { pointer-events: none; }

.transport { display: flex; gap: 8px; align-items: stretch; margin: 12px 0 0; flex-wrap: wrap; }
.transport button { min-height: 52px; min-width: 56px; font-size: 15px; }
.transport .icon { font-size: 26px; }
.transport .wide { min-width: 120px; }
.transport .wide .icon { font-size: 32px; }
#preview-follow { border-color: transparent; background: transparent; color: var(--muted); }
#preview-follow[aria-pressed="true"] { color: var(--accent); }
#viewer { justify-content: center; }

.group { border-top: 1px solid var(--line); margin-top: 20px; padding-top: 16px; }
.group .field + .field { margin-top: 14px; }
.selects { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0 12px; }
.font-input { align-items: center; }
.font-input > .icon { color: var(--muted); padding: 0 2px; }
#message-form textarea { field-sizing: content; min-height: 38px; max-height: 8em; }

details.panel { border-top: 1px solid var(--line); margin-top: 20px; }
details.panel + details.panel { margin-top: 0; }
details.panel > summary {
  display: flex; align-items: center; gap: 8px; min-height: 44px; cursor: pointer; list-style: none; font-weight: 500;
}
details.panel > summary::-webkit-details-marker { display: none; }
details.panel > summary::after { content: "expand_more"; font-family: "Material Symbols Outlined"; font-size: 20px; color: var(--muted); transition: transform .15s; }
details.panel > summary .help { text-decoration: none; margin-left: auto; color: var(--muted); display: inline-flex; }
details.panel > summary .help .icon { font-size: 18px; }
details.panel > summary .help:hover { color: var(--fg); }
details.panel > summary:not(:has(.help))::after { margin-left: auto; }
details.panel > summary > .icon { color: var(--muted); }
details.panel[open] > summary::after { transform: rotate(180deg); }
details.panel[open] { padding-bottom: 16px; }
details.panel form + form { margin-top: 20px; }
details.panel textarea { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 13px; margin: 0 0 8px; }
details.panel .inline-input { margin: 0 0 10px; }

#image-preview { display: block; width: 100%; max-height: 180px; object-fit: contain; margin: 0 0 10px; background: #111; }
.csv-state { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 0 0 10px; padding: 8px 10px; background: var(--surface); border: 1px solid var(--line); }
.csv-state dt { color: var(--muted); font-size: .8rem; padding-top: 2px; }
.csv-state dd { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }

.share .label { display: inline-flex; align-items: center; gap: 2px; }
.share .label .icon { font-size: 15px; }
.share .actions { margin-top: 14px; }

#token-form { max-width: 420px; margin-top: 16px; }

/* Icon font unavailable (offline) */
.offline-bar { margin: 0; padding: 6px 16px; font-size: .85rem; color: #7a4d00; background: #fff6df; border-bottom: 1px solid #ecd9a8; }
body[data-icons="off"] .icon { display: none; }
body[data-icons="off"] .icon[data-alt] { display: inline-block; font-size: 0; }
body[data-icons="off"] .icon[data-alt]::before { content: attr(data-alt); font: 15px system-ui, sans-serif; }
body[data-icons="off"] [data-fallback]::after { content: attr(data-fallback); font-size: .85rem; }
body[data-icons="off"] details.panel > summary::after { content: "▾"; font-family: inherit; }

/* Help page */
.doc { max-width: 720px; }
.doc h1 { font-size: 1.4rem; margin: 8px 0 16px; }
.doc h2 { font-size: 1.05rem; margin: 32px 0 8px; padding-top: 12px; border-top: 1px solid var(--line); }
.doc nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: .9rem; }
.doc ul { padding-left: 1.2em; line-height: 1.7; }
.doc code, .doc pre { font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
.doc code { background: var(--hover); padding: 1px 4px; border-radius: 2px; }
.doc pre { background: var(--surface); border: 1px solid var(--line); padding: 10px 12px; overflow-x: auto; }
.doc pre code { background: none; padding: 0; }
.doc kbd { font: 12px ui-monospace, monospace; border: 1px solid var(--line-strong); border-radius: 2px; padding: 0 4px; background: var(--surface); }
.doc .icon { font-size: 18px; vertical-align: -4px; color: var(--muted); }
.doc table { border-collapse: collapse; font-size: .9rem; }
.doc th, .doc td { border-bottom: 1px solid var(--line); padding: 6px 12px 6px 0; text-align: left; vertical-align: top; }

@media (max-width: 520px) {
  main { padding-top: 14px; }
  #preview-panel[data-floating="true"] { top: auto; bottom: 12px; right: 12px; width: min(220px, 60vw); }
  .transport button { flex: 1 1 0; min-width: 0; }
  .transport .wide { flex: 2 1 0; }
  .transport .spacer { display: none; }
  .time-input input { width: 4.5em; }
}