/* The chat's own layout, in a dark green palette. */
:root {
  color-scheme: dark;
  --bg: #0b0f0e;
  --surface: #101614;
  --raised: #141e18;
  --raised-strong: #1b2b20;
  --sunken: #080d0a;
  --line: #25332c;
  --line-strong: #3d5345;
  --text: #d0dbd3;
  --text-bright: #e4f4e8;
  --muted: #7d9486;
  --faint: #647b6d;
  --accent: #9ae6b5;
  --accent-fill: #95d6aa;
  --on-accent: #0a2112;
  --accent-line: #51735b;
  --danger: #ffb6a9;
  --danger-line: #7a3d36;
  --mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, "Noto Sans Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 var(--sans); }
button, input, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
/* Scrollbars in the palette, thin, on no track of their own: the page's, the chat list's, the
   history's, the viewer's and the rest, which inherit the colors. Hovered, a pane's thumb shows
   in green. Safari, which has no scrollbar-color, takes its own pseudo-elements instead. */
:root { scrollbar-color: var(--line-strong) transparent; }
* { scrollbar-width: thin; }
:where(.chats, .messages, .welcome, .activity, .viewer-content, .markdown pre, .slides .enhanced, .composer textarea):hover { scrollbar-color: var(--accent-line) transparent; }
@supports not (scrollbar-color: auto) {
  ::-webkit-scrollbar { width: 10px; height: 10px; }
  ::-webkit-scrollbar-track, ::-webkit-scrollbar-corner { background: transparent; }
  ::-webkit-scrollbar-thumb { border: 3px solid transparent; border-radius: 8px; background: var(--line-strong) padding-box; }
  ::-webkit-scrollbar-thumb:hover { background-color: var(--accent-line); }
}
[hidden] { display: none !important; }
h1, h2, h3 { margin: 0; font-weight: 550; color: var(--text-bright); }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border: 1px solid var(--line); border-radius: 8px; background: transparent; cursor: pointer; white-space: nowrap; }
.btn:hover { background: var(--raised-strong); border-color: var(--accent-line); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent-fill); border-color: var(--accent-fill); color: var(--on-accent); font-weight: 550; }
.btn.primary:hover { background: var(--accent); }
.btn.danger { border-color: var(--danger-line); color: var(--danger); }
.btn.danger:hover { background: #2b1a17; border-color: #a5544a; }
.btn.quiet { border-color: transparent; color: var(--muted); }
.btn.quiet:hover { color: var(--text); }
.btn.small { padding: 4px 10px; font-size: 12px; }
/* Icons, stroked in the button's color; a button of only an icon is square. */
.btn .glyph { flex: none; width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.btn.small .glyph { width: 16px; height: 16px; }
.btn.icon { justify-content: center; width: 36px; height: 36px; padding: 0; }
.btn.icon.small { width: 30px; height: 30px; }
.btn.icon.done { color: var(--accent); border-color: var(--accent-line); }
/* A button that reads as a link, within text. */
.link { padding: 0; border: 0; background: none; color: var(--accent); font: inherit; text-decoration: underline; text-underline-offset: 2px; cursor: pointer; }
/* The sync button: its arrows, which turn while it syncs, in red while the server cannot be
   reached. */
.sync { color: var(--muted); }
.sync.offline { color: var(--danger); }
@media (prefers-reduced-motion: no-preference) {
  .sync.syncing .glyph { animation: turn 1s linear infinite; }
}
@keyframes turn { to { transform: rotate(360deg); } }

/* The frame. */
.app { height: 100dvh; display: flex; flex-direction: column; }
.topbar { flex: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 20px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 15px; letter-spacing: 2px; color: var(--text-bright); }
.brand small { font-size: 11px; letter-spacing: 1px; color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px #9ae6b555; flex: none; }
.dot.offline { background: var(--danger); box-shadow: 0 0 12px #ffb6a955; }
.dot.locked { background: var(--faint); box-shadow: none; }
.status { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
.main { flex: 1; min-height: 0; width: 100%; max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 300px 1fr; border-inline: 1px solid var(--line); }
.locked-screen { flex: 1; display: grid; place-items: center; color: var(--muted); }

/* The chat list. */
.sidebar { min-height: 0; display: flex; flex-direction: column; background: var(--surface); border-right: 1px solid var(--line); }
.sidebar-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 14px 10px 18px; }
.sidebar-head h2 { font-size: 15px; }
.chats { flex: 1; overflow-y: auto; padding: 2px 8px 8px; }
.chat-item { width: 100%; display: grid; grid-template-columns: 38px 1fr auto; align-items: center; gap: 10px; padding: 9px 10px; border: 0; border-radius: 10px; background: none; text-align: left; cursor: pointer; }
.chat-item:hover { background: var(--raised); }
.chat-item.active { background: var(--raised-strong); }
.chat-text { min-width: 0; }
.chat-name { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-bright); font-weight: 500; }
.chat-sub { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12px; color: var(--muted); }
.chat-item.request .chat-sub { color: var(--accent); }
.chat-when { font-size: 11px; color: var(--faint); }
.badge { min-width: 20px; padding: 0 6px; border-radius: 10px; background: var(--accent-fill); color: var(--on-accent); font-size: 11px; font-weight: 600; text-align: center; }
.avatar { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: var(--raised-strong); border: 1px solid var(--line-strong); color: var(--accent); font-family: var(--mono); font-size: 13px; text-transform: uppercase; }
.chats-empty { margin: 16px 10px; color: var(--muted); font-size: 13px; }
.sidebar-foot { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-top: 1px solid var(--line); }
.whoami { flex: 1; min-width: 0; }
.whoami strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; color: var(--text-bright); }
.whoami span { font-family: var(--mono); font-size: 11px; color: var(--muted); }

/* A chat. */
.pane { min-height: 0; min-width: 0; display: flex; flex-direction: column; }
.pane-head { display: flex; align-items: center; gap: 12px; padding: 10px 18px; border-bottom: 1px solid var(--line); background: var(--surface); }
.pane-title { flex: 1; min-width: 0; }
.pane-title strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-bright); font-weight: 550; }
.pane-title span { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.back { display: none; }
.banner { margin: 14px 18px 0; padding: 12px 14px; display: flex; align-items: center; flex-wrap: wrap; gap: 10px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--raised); font-size: 13px; }
.banner span { flex: 1; min-width: 220px; }
.messages { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 4px; }
.message { max-width: min(560px, 80%); align-self: flex-start; display: flex; flex-direction: column; align-items: flex-start; margin-top: 6px; }
.message.me { align-self: flex-end; align-items: flex-end; }
.bubble { padding: 8px 12px; border: 1px solid var(--line); border-radius: 14px 14px 14px 4px; background: var(--raised); white-space: pre-wrap; overflow-wrap: anywhere; }
.message.me .bubble { border-color: var(--accent-line); border-radius: 14px 14px 4px 14px; background: var(--raised-strong); color: var(--text-bright); }
.meta { display: inline-flex; align-items: center; gap: 4px; padding: 2px 4px 0; font-size: 10px; color: var(--faint); }
.meta.failed { color: var(--danger); }
/* Every status as wide as the ticks, one or two, which are; three a little wider. */
.meta .status { display: inline-flex; align-items: center; gap: 1px; }
.meta .status .glyph { width: 16px; height: 11px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; }
.meta .status .glyph path { stroke-width: 1.5px; vector-effect: non-scaling-stroke; }
.meta .status.downloaded .glyph { width: 20.5px; }
.meta .status.read { color: var(--accent); }
.thumb { padding: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--sunken); cursor: zoom-in; }
.message.me .thumb { border-color: var(--accent-line); }
/* Bounded by the viewport rather than the message, whose width depends on the image's. */
.thumb img { display: block; max-width: min(320px, 70vw); max-height: 260px; }
/* Before its image is read, a thumbnail holds its place, so that it shows as it scrolls in. */
.thumb:empty { width: 160px; height: 120px; }
/* A video or audio in the chat, with its controls, and its name, which opens it in the viewer. */
.inline-media { max-width: 100%; }
.clip { display: flex; flex-direction: column; gap: 4px; max-width: min(360px, 74vw); padding: 6px; border: 1px solid var(--line); border-radius: 12px; background: var(--raised); }
.message.me .clip { border-color: var(--accent-line); background: var(--raised-strong); }
.clip video { display: block; width: 100%; max-height: 260px; border-radius: 8px; background: var(--sunken); }
.clip audio { display: block; width: min(320px, 70vw); }
.clip-name { padding: 2px 4px; border: 0; background: none; color: var(--muted); font-size: 12px; text-align: left; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: zoom-in; }
.clip-name:hover { color: var(--text); }
.clip.waiting { width: 240px; height: 135px; align-items: center; justify-content: center; color: var(--muted); font-size: 12px; text-align: center; overflow-wrap: anywhere; }
.clip.audio.waiting { height: 56px; }
.file-card { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--raised); text-align: left; cursor: pointer; }
.message.me .file-card { border-color: var(--accent-line); background: var(--raised-strong); }
.file-card:hover { border-color: var(--accent); }
.file-icon { font-family: var(--mono); font-size: 11px; color: var(--accent); border: 1px solid var(--line-strong); border-radius: 6px; padding: 4px 6px; }
.file-card strong { display: block; max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.file-card span { font-size: 12px; color: var(--muted); }
.uploads { display: flex; flex-direction: column; gap: 6px; padding: 0 18px; }
.uploads:has(.upload) { padding-block: 8px; border-top: 1px solid var(--line); }
.upload { display: flex; align-items: center; gap: 10px; }
.upload-text { flex: 1; min-width: 0; display: flex; flex-direction: column; font-size: 12px; color: var(--muted); }
.upload-text strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; font-weight: 500; color: var(--text-bright); }
.note { align-self: center; margin: 10px 0 4px; font-size: 12px; color: var(--muted); }
.composer { display: flex; align-items: flex-end; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--line); background: var(--surface); }
.composer textarea { flex: 1; min-width: 0; resize: none; max-height: 168px; padding: 9px 12px; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--sunken); color: var(--text-bright); line-height: 1.45; }
.composer textarea:focus { outline: none; border-color: var(--accent-line); }
.composer textarea::placeholder { color: var(--faint); }
/* As tall as a line of the text box. */
.composer .btn.icon { width: 40px; height: 40px; }

/* No chat open. */
.welcome { overflow-y: auto; padding: 48px 32px; }
.welcome-inner { max-width: 600px; margin: 0 auto; display: flex; flex-direction: column; gap: 22px; }
.eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: 2px; color: var(--muted); }
.welcome h1 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 500; letter-spacing: .5px; }
.welcome p { margin: 0; color: var(--muted); line-height: 1.7; }
.section-label { margin-bottom: 8px; font-size: 12px; color: var(--muted); }
.key { padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--sunken); color: var(--accent); font-family: var(--mono); font-size: 12px; line-height: 1.6; overflow-wrap: anywhere; user-select: all; }
/* A key or a link, with the button that copies it beside it. */
.copyable { display: flex; align-items: flex-start; gap: 8px; }
.copyable .key { flex: 1; min-width: 0; }
/* As tall as a line of the box. */
.copyable .btn.icon { width: 41px; height: 41px; }
.copyable + .section-label { margin-top: 16px; }
.key.safety { display: grid; grid-template-columns: repeat(4, max-content); justify-content: space-between; gap: 2px 12px; color: var(--text-bright); font-size: 14px; letter-spacing: 2px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.activity { margin: 0; padding: 12px 14px; list-style: none; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); font-family: var(--mono); font-size: 12px; line-height: 1.9; color: var(--muted); max-height: 220px; overflow-y: auto; }
.activity time { color: var(--faint); margin-right: 10px; }

/* Dialogs. */
dialog { padding: 0; border: 1px solid var(--line-strong); border-radius: 12px; background: #101714; color: var(--text); box-shadow: 0 20px 120px #000b; }
dialog::backdrop { background: #020706d9; backdrop-filter: blur(4px); }
.modal { width: 460px; max-width: calc(100vw - 24px); }
.modal form, .modal > div:not(.toast) { padding: 28px; display: flex; flex-direction: column; gap: 6px; }
.modal h2 { font-size: 20px; margin-bottom: 4px; }
.modal p { margin: 0 0 8px; color: var(--muted); font-size: 13px; line-height: 1.65; }
.modal label { margin-top: 12px; font-size: 12px; color: var(--muted); }
.modal input { width: 100%; padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--sunken); color: var(--text-bright); }
.modal input:focus { outline: none; border-color: var(--accent-line); }
.modal .error { min-height: 20px; margin: 8px 0 0; color: var(--danger); font-size: 12px; }
.modal .error.working { color: var(--muted); }
.modal .hint { margin: 6px 0 0; font-size: 12px; }
.modal .warning { margin: 12px 0 0; color: var(--danger); overflow-wrap: anywhere; }
.actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 14px; }
/* A chat's files: shelves by sort, then months, newest first. */
.modal.wide { width: 760px; }
.shelves { display: flex; flex-wrap: wrap; gap: 6px; }
.file-months { max-height: min(60dvh, 560px); margin-top: 10px; overflow-y: auto; display: flex; flex-direction: column; gap: 16px; }
.file-months h3 { position: sticky; top: 0; z-index: 1; margin: 0 0 8px; padding: 2px 0; background: #101714; color: var(--muted); font-size: 12px; font-weight: 550; letter-spacing: .04em; text-transform: uppercase; }
.file-months .empty { margin: 12px 0; }
.file-list { display: flex; flex-direction: column; gap: 4px; }
.file-entry { display: flex; align-items: center; gap: 10px; }
.file-entry .file-row { flex: 1; min-width: 0; }
.delete-remote { flex: none; font-size: 12px; }
.delete-remote.asked { color: var(--danger); }
.cancel-held { margin-right: 6px; font-size: 11px; }
.delete-remote:disabled { color: var(--muted); text-decoration: none; cursor: default; }
.file-row { display: flex; align-items: center; gap: 12px; padding: 8px 10px; border: 1px solid transparent; border-radius: 10px; background: none; text-align: left; cursor: pointer; }
.file-row:hover { border-color: var(--line); background: var(--raised); }
.file-row .file-icon { flex: none; width: 46px; overflow: hidden; text-align: center; text-overflow: ellipsis; }
.row-preview { flex: none; width: 46px; height: 46px; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.file-row > span:last-child { min-width: 0; }
.file-row strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.file-row span span { font-size: 12px; color: var(--muted); }
.file-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; }
.tile { position: relative; aspect-ratio: 1; min-width: 0; padding: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; cursor: zoom-in; }
.tile:hover { border-color: var(--accent-line); }
.tile-name { position: absolute; left: 0; right: 0; bottom: 0; padding: 14px 8px 6px; background: linear-gradient(transparent, #000c); color: #fff; font-size: 11px; text-align: left; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* A preview of media, filling its tile or row: an image, a video's first frames, a cover, or a
   glyph of its sort; a video's length over it. */
.preview { position: relative; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; background: var(--sunken); color: var(--muted); }
.preview img, .preview video { display: block; width: 100%; height: 100%; object-fit: cover; pointer-events: none; }
.preview > .glyph { width: 40%; max-width: 30px; height: auto; aspect-ratio: 1; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.preview .badge { position: absolute; left: 5px; bottom: 5px; display: inline-flex; align-items: center; gap: 3px; padding: 1px 5px; border-radius: 6px; background: #000b; color: #fff; font-size: 11px; font-variant-numeric: tabular-nums; }
.preview .badge .glyph { width: 9px; height: 9px; fill: currentColor; stroke: none; }
.row-preview .preview .badge { left: 2px; bottom: 2px; padding: 0 3px; font-size: 10px; }
.actions .btn.danger, .actions .aside { margin-right: auto; }

.viewer { width: min(1100px, 94vw); height: min(820px, 90dvh); }
.viewer-bar { height: 52px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 0 16px; border-bottom: 1px solid var(--line); font-size: 13px; }
.viewer-bar span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewer-bar div { display: flex; gap: 8px; flex: none; }
/* The search box in the viewer's bar; its matches are marked without changing the page. */
.search { display: flex; align-items: center; gap: 4px; }
.search input { width: 200px; padding: 4px 10px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--sunken); color: var(--text-bright); font-size: 12px; }
.search input:focus { outline: none; border-color: var(--accent-line); }
.search.invalid input { border-color: var(--danger-line); }
.search-count { min-width: 60px; text-align: center; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.search.invalid .search-count { color: var(--danger); }
.btn.toggle { font-family: var(--mono); font-size: 11px; }
.btn.toggle.on { color: var(--accent); border-color: var(--accent-line); background: var(--raised-strong); }
::highlight(search) { background-color: #ffcb6b40; }
::highlight(search-current) { background-color: #ffcb6b; color: #0b0f0e; }
@media (max-width: 600px) {
  .search .toggle { display: none; }
  .search input { width: 110px; }
  .search-count { min-width: 44px; }
}
.viewer-content { height: calc(100% - 52px); overflow: auto; }
/* Of a definite height, so that what it shows, portrait or landscape, scales down to fit whole. */
.media { height: 100%; display: flex; align-items: center; justify-content: center; padding: 24px; }
.media img, .media video { display: block; min-width: 0; min-height: 0; max-width: 100%; max-height: 100%; object-fit: contain; }
.media audio { width: min(560px, 90%); }
/* A track: its cover, what its tags say, and the player. */
.track { width: min(420px, 100%); display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center; }
.track .cover { width: min(280px, 100%); aspect-ratio: 1; object-fit: cover; border: 1px solid var(--line); border-radius: 10px; background: var(--sunken); box-shadow: 0 10px 40px #0008; }
.track-text { display: flex; flex-direction: column; gap: 2px; max-width: 100%; overflow-wrap: anywhere; color: var(--muted); font-size: 13px; }
.track-text strong { color: var(--text-bright); font-size: 17px; font-weight: 600; }
.track-text .artist { color: var(--text); font-size: 14px; }
.track audio { width: 100%; }
/* An attachment being opened: a bar of how much is decrypted, its sizes in figures of one width,
   so that nothing moves as they change. */
.opening { width: min(420px, 90%); display: flex; flex-direction: column; gap: 10px; }
.bar { position: relative; height: 6px; border-radius: 3px; background: var(--raised-strong); overflow: hidden; }
/* A light that sweeps along it while it fetches, as it fills only a chunk at a time. */
@media (prefers-reduced-motion: no-preference) {
  .bar::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent, #9ae6b540, transparent); transform: translateX(-100%); animation: sweep 1.4s ease-in-out infinite; }
}
@keyframes sweep { to { transform: translateX(100%); } }
.bar-fill { height: 100%; background: var(--accent-fill); transform-origin: left; transition: transform .2s; }
.opening-note { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.no-preview { color: var(--muted); }

/* Previews: code, Markdown, slides, PDFs, tables, archives, cards. */
.preview-bar { position: sticky; top: 0; z-index: 1; display: flex; justify-content: flex-end; padding: 10px 16px; background: #101714; border-bottom: 1px solid var(--line); }
.preview-note { margin: 0 0 12px; color: var(--muted); font-size: 12px; }
pre.code { margin: 0; padding: 24px; font-family: var(--mono); font-size: 13px; line-height: 1.7; white-space: pre-wrap; overflow-wrap: anywhere; tab-size: 4; }
.hl-comment { color: #6f8a79; font-style: italic; }
.hl-keyword, .hl-label { color: #c9a2f0; }
.hl-string, .hl-literal { color: #c3e88d; }
.hl-number, .hl-constant { color: #f7a26c; }
.hl-function, .hl-constructor, .hl-macro { color: #82aaff; }
.hl-type, .hl-attribute, .hl-namespace { color: #ffcb6b; }
.hl-property { color: #89ddff; }
.hl-tag, .hl-error { color: #f07178; }
.hl-operator, .hl-punctuation { color: #a3b8ab; }
.hl-embedded { color: var(--text); }
.hl-title { color: var(--text-bright); font-weight: 600; }
.hl-strong { font-weight: 700; }
.hl-emphasis { font-style: italic; }
.hl-link { color: #82aaff; text-decoration: underline; }
.hl-strikethrough { text-decoration: line-through; }
.hl-diff-add { color: #c3e88d; }
.hl-diff-delete { color: #f07178; }
.markdown { max-width: 860px; margin: 0 auto; padding: 24px 32px 48px; line-height: 1.7; overflow-wrap: anywhere; }
.markdown h1, .markdown h2, .markdown h3 { margin: 1.4em 0 .5em; }
.markdown h1 { font-size: 26px; }
.markdown h2 { font-size: 21px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.markdown a { color: var(--accent); }
.markdown code { font-family: var(--mono); font-size: .9em; padding: 1px 5px; border-radius: 4px; background: var(--sunken); }
.markdown pre { overflow: auto; padding: 14px 16px; border: 1px solid var(--line); border-radius: 8px; background: var(--sunken); line-height: 1.6; }
.markdown pre code { padding: 0; background: none; }
.markdown blockquote { margin: 0; padding: 2px 16px; border-left: 3px solid var(--accent-line); color: var(--muted); }
.markdown table { border-collapse: collapse; }
.markdown th, .markdown td { padding: 6px 12px; border: 1px solid var(--line); }
.markdown img, .markdown .diagram { max-width: 100%; }
.markdown .diagram { display: block; margin: 16px auto; padding: 16px; border-radius: 8px; background: var(--raised); }
.markdown math[display="block"] { margin: 12px 0; }
.slides { min-height: calc(100% - 50px); display: flex; flex-direction: column; }
.slides .enhanced { flex: 1; display: grid; place-items: center; }
.slide { width: 100%; font-size: 20px; text-align: center; }
.slide h1 { font-size: 2em; border: 0; }
.slide h2 { font-size: 1.6em; border: 0; }
.slide ul, .slide ol { display: inline-block; text-align: left; }
.slide pre { text-align: left; }
.slides-bar { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 12px; font-size: 13px; color: var(--muted); }
/* Full screen, the browser's or the window's: the slides alone, zoomed by --scale, which fits a
   960 by 700 slide to the screen, as reveal.js does; text still wraps at the screen's width. */
.slides.full { position: fixed; inset: 0; z-index: 10; height: 100%; min-height: 0; background: var(--bg); }
.slides.full .enhanced { overflow: auto; place-items: safe center; }
.slides.full .slide { zoom: var(--scale, 1); }
.slides.full .slides-bar { opacity: .4; transition: opacity .2s; }
.slides.full .slides-bar:hover, .slides.full .slides-bar:focus-within { opacity: 1; }
.pdf { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 24px; }
.pdf-page { width: min(860px, 100%); background: #fff; box-shadow: 0 4px 24px #0008; }
.table-preview, .archive, .cards { padding: 24px; }
.table-preview table { border-collapse: collapse; font-size: 13px; }
.table-preview th, .table-preview td { padding: 6px 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.table-preview th { position: sticky; top: 0; background: var(--raised-strong); color: var(--text-bright); }
.archive ul { margin: 0; padding: 0; list-style: none; font-family: var(--mono); font-size: 13px; }
.archive li { display: flex; justify-content: space-between; gap: 16px; padding: 4px 0; border-bottom: 1px solid var(--line); }
.archive li.directory { color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; align-content: start; }
.card { padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--raised); }
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card dl { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 0; font-size: 13px; }
.card dt { color: var(--muted); }
.card dd { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
/* A line each, colored across the view. */
.diff span { display: block; min-height: 1lh; }
.diff-file { color: var(--text-bright); font-weight: 600; }
.diff-hunk { color: #82aaff; }
.diff-added { color: #c3e88d; background: #1c2e1a; }
.diff-removed { color: #f07178; background: #2e1a1c; }

/* Notices and dropping files. */
.toast { position: fixed; right: 20px; bottom: 20px; z-index: 100; max-width: min(520px, calc(100vw - 40px)); padding: 12px 16px; border: 1px solid var(--accent-line); border-radius: 10px; background: var(--raised-strong); box-shadow: 0 10px 40px #0008; font-size: 13px; line-height: 1.6; white-space: pre-wrap; overflow-wrap: anywhere; opacity: 0; transform: translateY(6px); pointer-events: none; transition: opacity .15s, transform .15s; }
.toast.visible { opacity: 1; transform: none; }
.dropzone { position: fixed; inset: 14px; z-index: 90; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; border: 2px dashed var(--accent); border-radius: 14px; background: #0b2019f2; color: var(--text-bright); font-size: 22px; pointer-events: none; }
.dropzone span { font-size: 13px; color: var(--muted); }

@media (max-width: 720px) {
  .topbar { padding: 10px 14px; }
  .brand small { display: none; }
  .main { grid-template-columns: 1fr; border: 0; }
  .main.chat-open .sidebar { display: none; }
  .main:not(.chat-open) .pane { display: none; }
  .sidebar { border-right: 0; }
  .back { display: inline-flex; }
  .close { display: none; }
  .pane-head { padding: 8px 10px; }
  .messages { padding: 14px 10px; }
  .message { max-width: 88%; }
  .composer { padding: 10px; }
  .viewer { width: 100vw; height: 100dvh; max-width: 100vw; max-height: 100dvh; border-radius: 0; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }