:root {
  --bg: #ffffff;
  --bg-2: #f7f7f8;
  --canvas: #ececee;
  --line: #e4e4e7;
  --text: #18181b;
  --text-2: #71717a;
  /* from the icon: blue is you, amber is agents, gold marks comment pins, navy is the brand tile */
  --accent: #1F5FD6;
  --accent-soft: #e4ecfc;
  --agent: #E8801A;
  --pin: #FFC23D;
  --pin-ink: #3A2600;
  --navy: #0D1838;
  --danger: #dc2626;
  --ok: #16a34a;
  --radius: 6px;
  font: 12px/1.4 -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1e1e20; --bg-2: #262629; --canvas: #141416; --line: #34343a; --text: #f4f4f5; --text-2: #a1a1aa;
    --accent: #3D7EEA; --accent-soft: #172a52; --agent: #F59A3C; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); overflow: hidden; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
code { font-family: ui-monospace, Menlo, monospace; font-size: 11px; background: var(--bg-2); padding: 1px 4px; border-radius: 4px; }

body:not(.login) {
  display: grid;
  grid-template-columns: 240px 1fr 280px;
  grid-template-rows: 44px 1fr;
  grid-template-areas: "top top top" "left canvas right";
}

#topbar { grid-area: top; display: flex; align-items: center; justify-content: space-between; padding: 0 8px; border-bottom: 1px solid var(--line); gap: 8px; }
#topbar .group { display: flex; align-items: center; gap: 4px; min-width: 0; }
#doc-name { border: 1px solid transparent; background: transparent; padding: 4px 6px; border-radius: var(--radius); font-weight: 600; width: 260px; }
#doc-name:hover, #doc-name:focus { border-color: var(--line); outline: none; }
.home-btn { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 10px 0 8px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); color: var(--text); font-weight: 600; white-space: nowrap; }
.home-btn:hover { background: var(--bg-2); }
.crumb-sep { color: var(--text-2); margin: 0 2px; }
.tools button { width: 32px; height: 32px; border: 0; background: transparent; border-radius: var(--radius); display: grid; place-items: center; color: var(--text); }
.tools button:hover { background: var(--bg-2); }
.tools button.active { background: var(--accent); color: #fff; }
.sep { width: 1px; height: 20px; background: var(--line); margin: 0 4px; }
.icon-btn { border: 0; background: transparent; border-radius: var(--radius); width: 28px; height: 28px; display: grid; place-items: center; color: var(--text); }
.icon-btn:hover { background: var(--bg-2); }
.icon-btn.small { width: 20px; height: 20px; font-size: 14px; }
.btn { border: 1px solid var(--line); background: var(--bg); border-radius: var(--radius); padding: 5px 10px; white-space: nowrap; }
.btn:hover { background: var(--bg-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.danger { color: var(--danger); }
.btn.small { padding: 2px 8px; }
.live { display: inline-flex; align-items: center; gap: 5px; color: var(--text-2); padding: 0 6px; }
.live .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-2); }
.live.on .dot { background: var(--ok); }

aside { overflow: hidden; display: flex; flex-direction: column; background: var(--bg); }
#left { grid-area: left; border-right: 1px solid var(--line); }
#right { grid-area: right; border-left: 1px solid var(--line); }
section { display: flex; flex-direction: column; min-height: 0; border-bottom: 1px solid var(--line); }
section.grow { flex: 1; border-bottom: 0; }
.section-head { display: flex; justify-content: space-between; align-items: center; padding: 10px 12px 6px; font-weight: 600; }
.list { list-style: none; margin: 0; padding: 0 0 8px; overflow: auto; }
#pages { max-height: 160px; }
.list li { display: flex; align-items: center; gap: 6px; padding: 4px 12px; cursor: default; white-space: nowrap; user-select: none; }
.list li:hover { background: var(--bg-2); }
.list li.active { background: var(--accent-soft); }
.list li .name { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.list li .ico { width: 14px; color: var(--text-2); text-align: center; font-size: 11px; flex: none; }
.list li .twisty { width: 12px; color: var(--text-2); flex: none; cursor: pointer; font-size: 11px; }
.list li .act { opacity: 0; border: 0; background: none; color: var(--text-2); padding: 0 2px; }
.list li:hover .act, .list li .act.on { opacity: 1; }
.list li.hidden .name { opacity: .45; }
.list li.changed .name::after { content: ' •'; color: var(--agent); }
.list input { width: 100%; padding: 1px 4px; border: 1px solid var(--accent); border-radius: 4px; background: var(--bg); }

#canvas-wrap { grid-area: canvas; position: relative; overflow: hidden; background: var(--canvas); }
#stage { width: 100%; height: 100%; display: block; touch-action: none; user-select: none; }
#stage.tool-hand, #stage.panning { cursor: grab; }
#stage.tool-frame, #stage.tool-rect, #stage.tool-ellipse, #stage.tool-text, #stage.tool-comment { cursor: crosshair; }
#banner { position: absolute; top: 10px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 8px 12px; border-radius: 8px; display: flex; gap: 10px; align-items: center; box-shadow: 0 4px 16px rgba(0,0,0,.2); z-index: 5; }
#banner .btn { color: var(--text); }
#toasts { position: absolute; bottom: 12px; left: 12px; display: flex; flex-direction: column; gap: 6px; z-index: 5; pointer-events: none; }
.toast { background: var(--bg); border: 1px solid var(--line); border-left: 3px solid var(--agent); padding: 7px 10px; border-radius: 6px; box-shadow: 0 4px 12px rgba(0,0,0,.08); max-width: 420px; animation: fade 4s forwards; }
.toast b { font-weight: 600; }
@keyframes fade { 0%, 85% { opacity: 1; } 100% { opacity: 0; } }
#empty { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; color: var(--text-2); pointer-events: none; }
#empty h2 { color: var(--text); font-size: 16px; margin: 0 0 4px; }
#comment-pop { position: absolute; z-index: 6; width: 260px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.15); }
#comment-pop textarea { width: 100%; resize: vertical; border: 1px solid var(--line); border-radius: 6px; padding: 6px; background: var(--bg); }
.row { display: flex; gap: 6px; justify-content: flex-end; align-items: center; margin-top: 6px; }

#tabs { display: flex; border-bottom: 1px solid var(--line); padding: 0 6px; }
#tabs button { border: 0; background: none; padding: 10px 8px; font-weight: 600; color: var(--text-2); border-bottom: 2px solid transparent; }
#tabs button.active { color: var(--text); border-bottom-color: var(--accent); }
#comment-count:empty { display: none; }
#comment-count { background: var(--pin); color: var(--pin-ink); font-weight: 700; border-radius: 8px; padding: 0 5px; font-size: 10px; }
#panel { overflow: auto; flex: 1; }

.insp { padding: 10px 12px; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.insp h3 { margin: 0 0 2px; font-size: 11px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.insp .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.insp .grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
.field { display: flex; align-items: center; gap: 4px; border: 1px solid transparent; background: var(--bg-2); border-radius: 5px; padding: 0 6px; min-width: 0; }
.field:focus-within { border-color: var(--accent); }
.field > span { color: var(--text-2); font-size: 11px; flex: none; min-width: 12px; }
.field input, .field select { border: 0; background: transparent; padding: 5px 0; width: 100%; min-width: 0; outline: none; }
.field input[type=color] { width: 18px; height: 18px; padding: 0; flex: none; border-radius: 3px; cursor: pointer; }
.field input[type=color]::-webkit-color-swatch-wrapper { padding: 0; }
.field input[type=color]::-webkit-color-swatch { border: 1px solid var(--line); border-radius: 3px; }
textarea.field-area { width: 100%; border: 1px solid transparent; background: var(--bg-2); border-radius: 5px; padding: 6px; resize: vertical; min-height: 54px; outline: none; }
textarea.field-area:focus { border-color: var(--accent); }
textarea.mono { font-family: ui-monospace, Menlo, monospace; font-size: 11px; }
.check { display: flex; align-items: center; gap: 6px; color: var(--text-2); }
.check.disabled { opacity: 0.45; cursor: not-allowed; }
/* Canvas text must not be synthetically bolded or slanted: resvg has no such fallback, so the PNG would
   differ from the editor. Families without a real italic simply stay upright (the inspector says so). */
#stage text { font-synthesis: none; }
.seg { display: flex; background: var(--bg-2); border-radius: 5px; padding: 2px; }
.seg button { flex: 1; border: 0; background: none; border-radius: 4px; padding: 3px 0; color: var(--text-2); }
.seg button.on { background: var(--bg); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.1); }
.actions { display: flex; flex-wrap: wrap; gap: 6px; }
.meta { color: var(--text-2); font-size: 11px; word-break: break-all; }
.note { background: #fef9c3; color: #713f12; border-radius: 6px; padding: 6px 8px; white-space: pre-wrap; }

.thread { padding: 10px 12px; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.thread.resolved { opacity: .6; }
.thread .who { font-weight: 600; }
.thread .when { color: var(--text-2); font-size: 11px; }
.thread .reply { margin-left: 10px; padding-left: 8px; border-left: 2px solid var(--line); }
.thread .target { color: var(--accent); cursor: pointer; font-size: 11px; }
.thread form { display: flex; gap: 6px; }
.thread form input { flex: 1; border: 1px solid var(--line); border-radius: 5px; padding: 4px 6px; background: var(--bg); }
.panel-head { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--line); color: var(--text-2); }

.rev { padding: 8px 12px; border-bottom: 1px solid var(--line); cursor: pointer; display: flex; flex-direction: column; gap: 2px; }
.rev:hover { background: var(--bg-2); }
.rev.active { background: var(--accent-soft); }
.rev .top { display: flex; justify-content: space-between; }
.rev .who { font-weight: 600; }
.rev .who.agent::before { content: '◆ '; color: var(--agent); }
.rev .msg { color: var(--text); }
.rev .when { color: var(--text-2); font-size: 11px; }

dialog { border: 1px solid var(--line); border-radius: 10px; padding: 16px; width: min(640px, 92vw); background: var(--bg); color: var(--text); box-shadow: 0 20px 60px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(0,0,0,.3); }
.dialog-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.dialog-head h2 { margin: 0; font-size: 15px; }
dialog input:not([type]), dialog input[type=text], dialog select { border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; background: var(--bg); flex: 1; }
.doc-list { list-style: none; padding: 0; margin: 12px 0 0; max-height: 50vh; overflow: auto; }
.doc-list li { display: flex; justify-content: space-between; align-items: center; padding: 8px; border-radius: 6px; cursor: pointer; }
.doc-list li:hover { background: var(--bg-2); }
.doc-list .when { color: var(--text-2); }
pre.cmd { background: var(--bg-2); padding: 8px 10px; border-radius: 6px; white-space: pre-wrap; word-break: break-all; font: 11px/1.5 ui-monospace, Menlo, monospace; margin: 4px 0 12px; user-select: all; }
.connect h3 { margin: 14px 0 2px; font-size: 13px; }
.connect p { margin: 4px 0; color: var(--text-2); }
.tokens { width: 100%; border-collapse: collapse; margin-top: 8px; }
.tokens td { padding: 5px 4px; border-top: 1px solid var(--line); }
.secret { background: #fef3c7; color: #78350f; padding: 8px 10px; border-radius: 6px; margin: 8px 0; }

body.login { display: grid; place-items: center; background: linear-gradient(160deg, #1B3470 0%, var(--navy) 55%, #070E24 100%); }
body.login form { background: var(--bg); padding: 28px; border-radius: 14px; width: min(380px, 92vw); display: flex; flex-direction: column; gap: 10px; box-shadow: 0 24px 60px rgba(4,10,30,.45); }
body.login h1 { margin: 0; font-size: 20px; }
body.login p { margin: 0; color: var(--text-2); }
body.login input { border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; background: var(--bg); }
body.login button { background: var(--accent); color: #fff; border: 0; border-radius: 6px; padding: 8px; font-weight: 600; }
body.login .error { color: var(--danger); }

@media (max-width: 900px) {
  body:not(.login) { grid-template-columns: 0 1fr 0; }
  #left, #right { display: none; }
  #doc-name { width: 140px; }
  #live-text { display: none; }
}
@media (max-width: 640px) {
  .home-btn span, .crumb-sep, #live, #zoom-btn, .tools .sep { display: none; }
  .home-btn { padding: 0 7px; }
  #doc-name { width: auto; min-width: 0; flex: 1 1 0; }
  #topbar > .group:first-child { flex: 1 1 0; }
  #connect-btn { display: none; }
  #topbar { padding: 0 4px; gap: 4px; }
  .tools button { width: 26px; }
  #share-btn { padding: 5px 8px; }
}

body.login .google { display: flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid var(--line); border-radius: 6px; padding: 9px; color: var(--text); text-decoration: none; font-weight: 600; background: var(--bg); }
body.login .google:hover { background: var(--bg-2); }
body.login .or { display: flex; align-items: center; gap: 8px; color: var(--text-2); font-size: 11px; }
body.login .or::before, body.login .or::after { content: ''; flex: 1; height: 1px; background: var(--line); }
body.login .meta { color: var(--text-2); font-size: 12px; word-break: normal; }
body.login .check { display: flex; gap: 8px; align-items: flex-start; color: var(--text); }
body.login .row { display: flex; gap: 8px; justify-content: stretch; }
body.login .row button { flex: 1; }
body.login button.secondary { background: var(--bg-2); color: var(--text); border: 1px solid var(--line); }

/* home: your designs */
#home { position: fixed; inset: 0; z-index: 20; overflow: auto; background: var(--bg-2); display: block; border: 0; }
#home[hidden] { display: none; }
a.btn { text-decoration: none; color: var(--text); }
.home-top { position: sticky; top: 0; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 20px; background: var(--bg); border-bottom: 1px solid var(--line); }
.home-mark { display: inline-flex; align-items: center; gap: 8px; font: 600 15px/1 ui-monospace, 'SF Mono', Menlo, monospace; letter-spacing: -0.02em; color: var(--text); text-decoration: none; }
.home-top .group { display: flex; gap: 8px; }
.home-body { max-width: 1200px; margin: 0 auto; padding: 28px 20px 60px; }
.home-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; margin-bottom: 20px; }
.home-head h1 { margin: 0; font-size: 24px; letter-spacing: -0.02em; }
.home-new { display: flex; gap: 8px; flex: 0 1 420px; }
.home-new input { flex: 1; min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); padding: 6px 10px; background: var(--bg); }
.home-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); gap: 16px; }
.home-grid li { position: relative; }
.home-card { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--bg); color: var(--text); text-decoration: none; }
.home-card:hover { border-color: var(--accent); }
.home-thumb { position: relative; aspect-ratio: 4 / 3; overflow: hidden; display: grid; place-items: center; background: var(--canvas); border-bottom: 1px solid var(--line); }
.home-thumb img { position: absolute; inset: 8px; width: calc(100% - 16px); height: calc(100% - 16px); object-fit: contain; }
.home-thumb.empty::after { content: 'Empty canvas'; color: var(--text-2); }
.home-thumb.empty img { display: none; }
.home-meta { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px 12px; }
.home-meta b { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.home-meta span { color: var(--text-2); font-size: 11px; }
.home-del { position: absolute; top: 8px; right: 8px; opacity: 0; }
.home-grid li:hover .home-del, .home-del:focus-visible { opacity: 1; }
@media (hover: none) { .home-del { opacity: 1; } }
.home-empty { text-align: left; max-width: 52ch; color: var(--text-2); }
.home-empty h2 { color: var(--text); font-size: 16px; margin: 24px 0 4px; }

/* read-only: viewers, and anyone previewing an old revision */
body.readonly #add-page, body.viewer .tools [data-tool="frame"], body.viewer .tools [data-tool="rect"], body.viewer .tools [data-tool="ellipse"],
body.viewer .tools [data-tool="text"], body.viewer .tools [data-tool="comment"], body.viewer .tools .sep { display: none; }
body.readonly #doc-name:hover { border-color: transparent; }