/*
 * Comark stylesheet.
 *
 * One file, no preprocessor, no build step — consistent with the rest of the
 * frontend. Colours are defined once as tokens on :root and swapped under
 * prefers-color-scheme, so every surface follows the reader's system setting.
 */

:root {
  color-scheme: light dark;

  --bg: #fbfbfd;
  --surface: #ffffff;
  --surface-alt: #f4f4f7;
  --fg: #1c1c21;
  --muted: #6b6b76;
  --rule: #e2e2e8;
  --accent: #3b4cca;
  --accent-fg: #ffffff;
  --danger: #c0392b;
  --ok: #17794c;
  --warn: #9a6700;
  --code-bg: #f3f3f6;

  --radius: 8px;
  --radius-sm: 5px;
  --shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 4px 12px rgb(0 0 0 / 4%);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

/*
 * Three theme states (see frontend/app/theme.js):
 *
 *   no data-theme attribute -> follow the operating system
 *   data-theme="light"      -> force light, even under a dark OS
 *   data-theme="dark"       -> force dark, even under a light OS
 *
 * The media query is guarded with :not([data-theme="light"]) so an explicit
 * light choice is not overridden by the OS preference.
 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131317;
    --surface: #1b1b21;
    --surface-alt: #23232b;
    --fg: #e9e9ee;
    --muted: #9a9aa6;
    --rule: #32323c;
    --accent: #8a97ff;
    --accent-fg: #16161c;
    --danger: #ff6b5e;
    --ok: #5ad19b;
    --warn: #e5b567;
    --code-bg: #24242c;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 4px 14px rgb(0 0 0 / 25%);
  }
}

:root[data-theme="dark"] {
  --bg: #131317;
  --surface: #1b1b21;
  --surface-alt: #23232b;
  --fg: #e9e9ee;
  --muted: #9a9aa6;
  --rule: #32323c;
  --accent: #8a97ff;
  --accent-fg: #16161c;
  --danger: #ff6b5e;
  --ok: #5ad19b;
  --warn: #e5b567;
  --code-bg: #24242c;
  --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 4px 14px rgb(0 0 0 / 25%);
  color-scheme: dark;
}

:root[data-theme="light"] {
  color-scheme: light;
}

.theme-toggle {
  border: 1px solid var(--rule);
  background: var(--surface);
  border-radius: var(--radius-sm);
  width: 2rem; height: 2rem; padding: 0;
  font-size: 1rem; line-height: 1; cursor: pointer;
}
.theme-toggle:hover { background: var(--surface-alt); }

* { box-sizing: border-box; }

/*
 * The `hidden` attribute must win over any `display` a class sets. Without
 * this, `.badge { display: inline-block }` silently defeats `hidden`, and a
 * private pad renders the "public snapshot" badge.
 */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

body.centered { display: grid; min-height: 100vh; grid-template-rows: auto 1fr auto; }

a { color: var(--accent); text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent); }
a:hover { text-decoration-color: currentColor; }

h1 { font-size: 1.6rem; line-height: 1.25; letter-spacing: -0.02em; margin: 0 0 .25em; }
h2 { font-size: 1.15rem; margin: 0 0 .5em; }
h3 { font-size: 1rem; margin: 1.25em 0 .4em; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-fg); padding: .5rem .9rem;
}
.skip-link:focus { left: .5rem; top: .5rem; }

/* -- chrome --------------------------------------------------------------- */

.topbar {
  display: flex; align-items: center; gap: 1.25rem;
  padding: .65rem 1.25rem;
  background: var(--surface); border-bottom: 1px solid var(--rule);
}

.brand { font-weight: 620; letter-spacing: -.02em; color: var(--fg); text-decoration: none; }
.topnav { display: flex; gap: 1rem; }
.topnav-end { gap: .9rem; }
.topnav a { color: var(--muted); text-decoration: none; padding: .2rem 0; }
.topnav a:hover { color: var(--fg); }
.topnav a[aria-current] { color: var(--fg); box-shadow: inset 0 -2px var(--accent); }
.topbar-user { margin-left: auto; display: flex; align-items: center; gap: 1rem; }
.username { color: var(--muted); font-size: .9rem; }

/*
 * Content spans 80% of the viewport, centred. Narrow screens fall back to the
 * full width minus a gutter, because 80% of a phone is unreadably cramped.
 */
.page, .pad-page, .flash, .footer {
  width: 80%;
  margin-inline: auto;
}
.page { padding: 1.75rem 0 4rem; }
.pad-page { padding: 1.25rem 0 3rem; }
.auth { display: grid; place-items: center; padding: 2rem 1.25rem; }

.footer {
  padding: 1.5rem 0 2.5rem;
  color: var(--muted); font-size: .82rem; display: flex; gap: .5rem;
}

.flash {
  margin-block: 1rem -0.5rem; padding: .65rem 1rem;
  border-radius: var(--radius-sm); border: 1px solid var(--rule); background: var(--surface);
}
.flash-success { border-color: color-mix(in srgb, var(--ok) 45%, var(--rule)); }
.flash-error { border-color: color-mix(in srgb, var(--danger) 45%, var(--rule)); }

/* -- forms and buttons ----------------------------------------------------- */

button, .button, input, select, textarea {
  font: inherit; color: inherit;
}

input[type="text"], input[type="search"], input[type="password"], select, textarea {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius-sm); padding: .45rem .6rem; min-width: 0;
}
input:focus-visible, select:focus-visible, textarea:focus-visible,
button:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

button, .button {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius-sm); padding: .45rem .8rem; cursor: pointer;
  text-decoration: none; display: inline-block;
}
button:hover, .button:hover { background: var(--surface-alt); }

button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
button.primary:hover { filter: brightness(1.08); }
button.danger, .danger { color: var(--danger); }

.link-button {
  background: none; border: none; padding: 0; color: var(--accent);
  cursor: pointer; text-decoration: underline;
}

.inline { display: inline-flex; gap: .4rem; align-items: center; }
.row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin: .75rem 0; }
.stack { display: grid; gap: .4rem; max-width: 30rem; margin: .75rem 0; }
.stack.wide { max-width: none; }
textarea { font-family: var(--mono); font-size: .9rem; line-height: 1.6; resize: vertical; }
.stack label, .auth-card label { font-size: .85rem; color: var(--muted); }

.card {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 1.25rem; margin: 0 0 1.5rem; box-shadow: var(--shadow);
}
.auth-card { display: grid; gap: .5rem; width: min(24rem, 100%); }
.auth-card button { margin-top: .75rem; }

.page-head { display: flex; align-items: flex-start; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.page-head h1 { margin-right: auto; }
.filters { display: flex; gap: .5rem; align-items: center; margin: 0 0 1rem; flex-wrap: wrap; }
.filters input[type="search"] { flex: 1 1 18rem; }

.muted { color: var(--muted); }
.small { font-size: .85rem; }
.mono { font-family: var(--mono); }
.numeric { font-variant-numeric: tabular-nums; text-align: right; }
.error { color: var(--danger); }
.warning { color: var(--warn); }
.empty { color: var(--muted); padding: 2rem 0; text-align: center; }
.notice {
  background: var(--surface-alt); border: 1px solid var(--rule);
  border-radius: var(--radius-sm); padding: .75rem 1rem;
}

/* -- pad list --------------------------------------------------------------- */

.pad-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.pad-row {
  display: flex; gap: 1rem; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: .85rem 1rem;
}
.pad-main { min-width: 0; flex: 1; }
.pad-title { font-weight: 560; text-decoration: none; color: var(--fg); }
.pad-title:hover { color: var(--accent); }
.pad-snippet { margin: .3rem 0 0; color: var(--muted); font-size: .9rem; }
.pad-tags { margin: .45rem 0 0; display: flex; gap: .35rem; flex-wrap: wrap; }
.pad-meta { display: flex; flex-direction: column; align-items: flex-end; gap: .3rem; color: var(--muted); font-size: .8rem; }

.badge {
  display: inline-block; font-size: .72rem; letter-spacing: .02em; text-transform: uppercase;
  padding: .15rem .45rem; border-radius: 999px;
  border: 1px solid var(--rule); background: var(--surface-alt); color: var(--muted);
}
.badge-write { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--rule)); }
.badge-read { color: var(--muted); }
.badge-public { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 45%, var(--rule)); text-decoration: none; }

.tag-cloud { display: flex; gap: .4rem; flex-wrap: wrap; margin: 0 0 1.25rem; }
/* On the tags page the cloud is the content, so give it room and let each
   tag's size carry its count. */
.tag-cloud-large { gap: .55rem; align-items: baseline; margin-bottom: 2rem; }
.tag-cloud-large .tag { padding: .2rem .75rem; }
.tag {
  display: inline-flex; gap: .3rem; align-items: center;
  background: var(--surface-alt); border: 1px solid var(--rule);
  border-radius: 999px; padding: .15rem .6rem; font-size: .82rem;
  text-decoration: none; color: var(--muted);
}
.tag:hover { color: var(--fg); }
.tag-active { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.tag-count { opacity: .65; font-variant-numeric: tabular-nums; }
.tag-small { font-size: .75rem; padding: .05rem .5rem; }

/* -- tables ------------------------------------------------------------------ */

.table { width: 100%; border-collapse: collapse; margin: .5rem 0 1rem; font-size: .9rem; }
.table th, .table td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
.table th { font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 560; }
.table tr.revoked td { opacity: .55; }
.table tr.selected { background: var(--surface-alt); }
.row-actions { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }

.chip-list { list-style: none; margin: .5rem 0; padding: 0; display: flex; gap: .4rem; flex-wrap: wrap; }
.chip {
  display: inline-flex; gap: .35rem; align-items: center;
  background: var(--surface-alt); border: 1px solid var(--rule);
  border-radius: 999px; padding: .15rem .3rem .15rem .65rem; font-size: .85rem;
}
.chip-remove { background: none; border: none; padding: 0 .35rem; cursor: pointer; color: var(--muted); line-height: 1; }
.chip-remove:hover { color: var(--danger); }

.subnav { display: flex; gap: 1rem; margin: 1rem 0 1.5rem; border-bottom: 1px solid var(--rule); }
.subnav a { padding: .4rem 0; text-decoration: none; color: var(--muted); }
.subnav a[aria-current] { color: var(--fg); box-shadow: inset 0 -2px var(--accent); }

.menu { display: inline-block; position: relative; }
.menu > summary { cursor: pointer; list-style: none; padding: .45rem .8rem; border: 1px solid var(--rule); border-radius: var(--radius-sm); background: var(--surface); }
.menu > summary::-webkit-details-marker { display: none; }
.menu-body {
  position: absolute; right: 0; z-index: 20; margin-top: .35rem; min-width: 12rem;
  display: grid; gap: .4rem; padding: .6rem;
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.menu-body a { text-decoration: none; padding: .25rem .35rem; border-radius: var(--radius-sm); }
.menu-body a:hover { background: var(--surface-alt); }

.panel { border: 1px solid var(--rule); border-radius: var(--radius); background: var(--surface); padding: .75rem 1rem; margin-bottom: .6rem; }
.panel > summary { cursor: pointer; font-weight: 560; }
.pad-panels { margin-top: 1.25rem; }

/* -- editor -------------------------------------------------------------------- */

.pad-header { display: flex; gap: 1rem; align-items: flex-start; flex-wrap: wrap; margin-bottom: 1rem; }
.pad-identity { margin-right: auto; min-width: 0; }

/* One status line under the title: access, publication, connection, who is
   here, and the pad's tags. */
.pad-status {
  display: flex; align-items: center; gap: .5rem; flex-wrap: wrap;
  margin: .45rem 0 0; min-height: 1.9rem;
}
.pad-status .presence { margin: 0; }
.pad-status .form-status { margin-left: .25rem; }

.rename-form { margin: 0; }
.rename-form input {
  font-size: 1.35rem; font-weight: 560; letter-spacing: -.02em;
  padding: .2rem .45rem; width: min(34rem, 60vw);
  background: transparent; border-color: transparent;
}
.rename-form input:hover { border-color: var(--rule); }
.rename-form input:focus { background: var(--surface); border-color: var(--rule); }

.tag-form { display: inline-flex; margin: 0; }
.tag-form input {
  font-size: .82rem; padding: .15rem .55rem; width: 14rem;
  background: transparent; border-color: transparent; border-radius: 999px;
}
.tag-form input:hover { border-color: var(--rule); }
.tag-form input:focus { background: var(--surface); border-color: var(--rule); width: 20rem; }
.pad-actions { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }

.view-switch { display: inline-flex; border: 1px solid var(--rule); border-radius: var(--radius-sm); overflow: hidden; }
.view-switch button { border: none; border-radius: 0; border-right: 1px solid var(--rule); }
.view-switch button:last-child { border-right: none; }
.view-switch button[aria-pressed="true"] { background: var(--accent); color: var(--accent-fg); }

/* -- presence ------------------------------------------------------------- */

.presence {
  list-style: none; display: flex; flex-wrap: wrap; gap: .5rem;
  margin: .5rem 0 0; padding: 0;
}
.presence-person {
  display: inline-flex; align-items: center; gap: .35rem;
  background: var(--surface-alt); border: 1px solid var(--rule);
  border-radius: 999px; padding: .1rem .6rem .1rem .45rem;
  font-size: .8rem; color: var(--muted);
}
.presence-self { color: var(--fg); }
.presence-dot { width: .6rem; height: .6rem; border-radius: 50%; flex: none; }

/* The line a collaborator's cursor sits on, tinted in their colour. */
.cm-collaboratorLine {
  background: color-mix(in srgb, var(--collaborator-color) 16%, transparent);
  box-shadow: inset 2px 0 var(--collaborator-color);
}

.form-status { font-size: .82rem; color: var(--muted); }
.form-status[data-state="ok"] { color: var(--ok); }
.form-status[data-state="error"] { color: var(--danger); }

.conn { font-size: .8rem; color: var(--muted); }
.conn-ok { color: var(--ok); }
.conn-warn { color: var(--warn); }
.conn-error { color: var(--danger); }

.editor-split {
  display: grid; gap: 1rem; align-items: stretch;
  grid-template-columns: 1fr 1fr;
  min-height: 60vh;
}
.editor-split[data-view="source"], .editor-split[data-view="rendered"] { grid-template-columns: 1fr; }

.editor-pane, .preview-pane {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius); overflow: auto; min-height: 60vh;
}
.preview-pane { padding: 1.25rem 1.5rem; }
.editor-pane[hidden], .preview-pane[hidden] { display: none; }

.cm-editor { height: 100%; }
.cm-editor.cm-focused { outline: none; }
.cm-scroller { font-family: var(--mono); font-size: .92rem; line-height: 1.6; }
.cm-gutters { background: var(--surface); border-right: 1px solid var(--rule); color: var(--muted); }
.cm-activeLine { background: color-mix(in srgb, var(--accent) 6%, transparent); }
.cm-activeLineGutter { background: transparent; }

/* Collaborator cursors from y-codemirror.next. */
.cm-ySelection { opacity: .3; }
.cm-ySelectionCaret { position: relative; border-left: 2px solid; margin-left: -1px; }
.cm-ySelectionInfo {
  position: absolute; top: -1.35em; left: -2px; font-size: .68rem; padding: 0 .3em;
  border-radius: 3px 3px 3px 0; color: #fff; white-space: nowrap; user-select: none;
}

.fallback-content { white-space: pre-wrap; background: var(--code-bg); padding: 1rem; border-radius: var(--radius); }

/* -- markdown ---------------------------------------------------------------------- */

.markdown-body > :first-child { margin-top: 0; }
.markdown-body h1, .markdown-body h2 { border-bottom: 1px solid var(--rule); padding-bottom: .25em; }
.markdown-body pre { background: var(--code-bg); padding: .85rem 1rem; border-radius: var(--radius-sm); overflow-x: auto; }
.markdown-body code { font-family: var(--mono); font-size: .92em; background: var(--code-bg); padding: .12em .35em; border-radius: 3px; }
.markdown-body pre code { background: none; padding: 0; }
.markdown-body img { max-width: 100%; height: auto; border-radius: var(--radius-sm); }
.markdown-body table { border-collapse: collapse; width: 100%; }
.markdown-body th, .markdown-body td { border: 1px solid var(--rule); padding: .4rem .6rem; }
.markdown-body blockquote { margin: 0; padding-left: 1rem; border-left: 3px solid var(--rule); color: var(--muted); }
.markdown-body figure { margin: 1rem 0; }
.markdown-body figcaption { color: var(--muted); font-size: .82rem; }

/* -- history / tokens ---------------------------------------------------------------- */

.diff { background: var(--code-bg); padding: .85rem 1rem; border-radius: var(--radius-sm); overflow-x: auto; font-family: var(--mono); font-size: .85rem; }
.diff-add { color: var(--ok); display: block; }
.diff-del { color: var(--danger); display: block; }
.diff-hunk { color: var(--accent); display: block; }
.diff-meta, .diff-context { color: var(--muted); display: block; }
.revision-detail { margin-top: 2rem; border-top: 1px solid var(--rule); padding-top: 1.5rem; }

.token, .clone-command {
  background: var(--code-bg); padding: .65rem .85rem; border-radius: var(--radius-sm);
  font-family: var(--mono); font-size: .85rem; overflow-x: auto; user-select: all;
}
.token-reveal {
  border: 1px solid color-mix(in srgb, var(--warn) 45%, var(--rule));
  border-radius: var(--radius); padding: .85rem 1rem; margin: 1rem 0;
  background: color-mix(in srgb, var(--warn) 6%, var(--surface));
}

@media (max-width: 900px) {
  .page, .pad-page, .flash, .footer { width: auto; margin-inline: 1rem; }
}

@media (max-width: 760px) {
  .editor-split { grid-template-columns: 1fr; }
  .editor-split[data-view="split"] .preview-pane { min-height: 30vh; }
  .topnav { gap: .75rem; }
  .page-head { flex-direction: column; align-items: stretch; }
}

/* -- dialogs ---------------------------------------------------------------- */

.dialog {
  border: 1px solid var(--rule); border-radius: var(--radius);
  background: var(--surface); color: var(--fg);
  padding: 1.25rem 1.5rem; width: min(38rem, 92vw); box-shadow: var(--shadow);
}
.dialog::backdrop { background: rgb(0 0 0 / 45%); }
.dialog-head { display: flex; align-items: center; gap: 1rem; margin-bottom: .5rem; }
.dialog-head h2 { margin: 0; margin-right: auto; }
.dialog-head .link-button { font-size: 1.3rem; text-decoration: none; line-height: 1; }

.pad-edited { white-space: nowrap; }