styles.css

/* styles.css — Daylight Paper. Tokens and rules from docs/redesign-plan.md.
   Light-first, warm, editorial: paper that happens to be in a browser.
   Mobile-first: base styles are the <768px single-pane shell; wider
   layouts are added in min-width queries (redesign-plan §4). */

/* ---- Writing face ---------------------------------------------------------
   Self-hosted (redesign-plan §3): the writing surface must not depend on a
   third-party request — offline is exactly when a local-first notepad is
   most likely to be open. latin-ext carries Turkish (ğ ş İ ı). */
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/source-serif-4-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/source-serif-4-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* Available to assistive technology, absent from the page. Used by the status
   bar's announcer (#status-a11y): the visible status text carries a timestamp
   that changes on every save, so announcing it verbatim would repeat the same
   fact on every flush. The announcer carries the state phrase alone. */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* The no-JavaScript fallback (index.html). Styled from literals, not tokens:
   it sits above #app in the document and must stay legible even if the token
   layer below ever changes shape. */
#noscript-note {
  max-width: 34rem;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  font-family: "Source Serif 4", Charter, Georgia, serif;
  font-size: 18px;
  line-height: 1.7;
  color: #1C1917;
}
#noscript-note h1 { font-size: 24px; font-weight: 400; margin: 0 0 1rem; }
#noscript-note a { color: #B45309; }

/* ---- Tokens ---------------------------------------------------------------
   Light is the default scheme. Every value here was contrast-measured on
   2026-08-19 (see redesign-plan §2/§5 and the implementation notes):
   - --text-secondary is #716B66, NOT the plan's #78716C: the plan measured
     that one only on --bg (4.59:1); on --panel-bg it is 4.44:1 and fails.
     #716B66 measures 4.86:1 on panel, 5.07:1 on bg.
   - --accent (#B45309, 4.84:1 on bg) is for text, links and focus;
     --accent-surface (#D97706, 3.07:1 vs bg) is for fills and icons ONLY.
     Do not collapse them (redesign-plan §2).
   - The functional set (--ok/--info/--warn/--danger) is deliberately not
     the brand accent; every use pairs with a label or icon, never color
     alone (redesign-plan §5 — the two-fact honesty rule). */
:root {
  color-scheme: light;

  --bg: #FFFBEB;
  --panel-bg: #F6F6F6;
  --elevated-bg: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #716B66;
  /* Meta text that sits on a *tinted* row rather than the flat panel. The
     selected note's translucent overlay composites the panel down to ~#E2E2E2,
     where --text-secondary measures only 4.06:1 at 12px — a real 1.4.3 failure
     on the one row the reader is looking at. Measured 2026-08-22: this value
     is 4.86:1 on the selected row, 5.82:1 on the plain panel. */
  --text-meta: #655F5A;
  --border: #EEEDED;
  --accent: #B45309;
  --accent-surface: #D97706;
  --on-accent: #1C1917;        /* 5.49:1 on --accent-surface */
  --hover-bg: rgba(28, 25, 23, 0.05);
  --active-bg: rgba(28, 25, 23, 0.09);
  --selection: rgba(217, 119, 6, 0.22);
  --sheet-shadow: 0 1px 2px rgba(28, 25, 23, 0.04), 0 8px 24px rgba(28, 25, 23, 0.05);

  /* Functional states — measured on both --bg and --panel-bg (4.5:1+). */
  --ok: #15803D;
  --info: #1D4ED8;
  --warn: #92400E;
  --danger: #B91C1C;

  --font-ui: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-writing: "Source Serif 4", Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
  /* The alternate writing face, for notes where column alignment carries
     meaning: ASCII/box-drawing diagrams, tables, code, log excerpts. System
     faces only — the same offline reasoning that made the serif self-hosted
     rules out downloading a second family for an opt-in mode. */
  --font-code: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono", "Liberation Mono", monospace;

  /* Spacing scale (density 5 / standard): 16 / 24 / 32 / 48 / 64. */
  --space-1: 16px;
  --space-2: 24px;
  --space-3: 32px;
  --space-4: 48px;
  --space-5: 64px;

  --radius-control: 6px;
  --radius-panel: 8px;
  --radius-dialog: 10px;
  --motion-control: 150ms;
  --motion-panel: 210ms;
}

/* Dark — the warm counterpart (redesign-plan §2), secondary mode.
   Measured 2026-08-19: all text/functional values clear 4.5:1 on every
   surface they appear on. --warn is #F97316, NOT the light value: on dark
   panels #92400E is illegible, and #F97316 is the most separable orange
   from the #FBBF24 accent that still passes (they remain close in
   luminance — one more reason warning states always carry a label). */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1C1917;
  --panel-bg: #262220;
  --elevated-bg: #2E2A27;
  --text: #FAF9F6;
  --text-secondary: #A8A29E;
  /* Dark counterpart: --text-secondary measured 4.49:1 on the selected row's
     composited surface — a hairline miss. This is 4.93:1 there, 6.87:1 plain. */
  --text-meta: #B0AAA6;
  --border: #3A3532;
  --accent: #FBBF24;
  --accent-surface: #D97706;
  --hover-bg: rgba(250, 249, 246, 0.06);
  --active-bg: rgba(250, 249, 246, 0.11);
  --selection: rgba(251, 191, 36, 0.30);
  --sheet-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 8px 24px rgba(0, 0, 0, 0.25);
  --ok: #4ADE80;
  --info: #60A5FA;
  --warn: #F97316;
  --danger: #F87171;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #1C1917;
    --panel-bg: #262220;
    --elevated-bg: #2E2A27;
    --text: #FAF9F6;
    --text-secondary: #A8A29E;
    --text-meta: #B0AAA6;
    --border: #3A3532;
    --accent: #FBBF24;
    --accent-surface: #D97706;
    --hover-bg: rgba(250, 249, 246, 0.06);
    --active-bg: rgba(250, 249, 246, 0.11);
    --selection: rgba(251, 191, 36, 0.30);
    --sheet-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 8px 24px rgba(0, 0, 0, 0.25);
    --ok: #4ADE80;
    --info: #60A5FA;
    --warn: #F97316;
    --danger: #F87171;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root { --motion-control: 0ms; --motion-panel: 0ms; }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.45;
}

::selection { background: var(--selection); }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  border-radius: var(--radius-control);
  cursor: pointer;
  transition: background var(--motion-control) ease, border-color var(--motion-control) ease, color var(--motion-control) ease;
}
button svg { flex: none; }
button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible, a:focus-visible {
  /* Focus uses --accent, never --accent-surface (redesign-plan §10). */
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---- Frame ----------------------------------------------------------------
   Base = mobile: one pane at a time. #app carries data-view="list"|"editor";
   app.js owns it (including real back behavior via history state). */

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}
#app-notices:empty { display: none; }
#app-notices .app-notice {
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--elevated-bg);
  color: var(--danger);
  font-size: 13px;
}
/* Browser-retention information (e.g. the standing Safari notice) is never
   colored like a save failure — the two-fact honesty rule keeps those
   truths visually separate everywhere in this app (redesign-plan §5). */
#app-notices .app-notice.tone-info { color: var(--info); }

/* Single-pane switching. No data-view attribute behaves as the list view,
   so the pre-boot frame never flashes an empty editor. */
#app:not([data-view="editor"]) #editor-panel { display: none; }
#app[data-view="editor"] #notes-panel { display: none; }

/* ---- Sidebar / notes list ------------------------------------------------ */

#notes-panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  position: relative; /* anchors the undo-banner overlay */
  /* The panel itself scrolls on small screens; the action row is sticky. */
  overflow-y: auto;
}

#brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem var(--space-1) 0.75rem;
}
#brand svg { flex: none; display: block; }
#brand .wordmark {
  font-family: var(--font-writing);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--text);
}
#brand .brand-spacer { flex: 1; }

#theme-toggle {
  padding: 0.35rem 0.45rem;
  color: var(--text-secondary);
  line-height: 0;
}
#theme-toggle:hover { background: var(--hover-bg); color: var(--text); }

/* Temporary home for the language control (product-maturity-plan.md §3.1 moves
   it into Settings). A native select, styled down to match the header chrome
   but keeping its own popup — the platform control is the accessible one. */
#language-select {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-control, 6px);
  padding: 0.2rem 0.15rem;
  min-height: 24px;
  cursor: pointer;
}
#language-select:hover { background: var(--hover-bg); color: var(--text); border-color: var(--border); }
/* The popup itself is painted by the platform, so its options need an explicit
   background — a transparent one inherits the page and can render unreadably. */
#language-select option { background: var(--elevated-bg); color: var(--text); }

.sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0 0.75rem 0.75rem;
  /* New note + Search stay reachable while the panel scrolls. */
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--panel-bg);
  padding-top: 0.5rem;
}

#new-note {
  padding: 0.55rem 0.75rem;
  font-weight: 600;
  text-align: center;
  color: var(--on-accent);
  background: var(--accent-surface);
  border: 1px solid transparent;
}
#new-note:hover { filter: brightness(1.06); }
#new-note:active { filter: brightness(0.95); }

#search {
  font: inherit;
  width: 100%;
  padding: 0.45rem 0.65rem;
  color: var(--text);
  background: var(--elevated-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
}
#search::placeholder { color: var(--text-secondary); }

#note-list {
  list-style: none;
  margin: 0;
  padding: 0 0.5rem;
  /* Mobile: the panel is the scroll container and the list flows in it.
     >=768px flips this: the list scrolls internally, the footer stays put. */
  flex: none;
  min-height: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
#note-list::-webkit-scrollbar { width: 8px; }
#note-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
#note-list .list-heading {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 0.7rem 0.5rem 0.25rem;
}
/* Empty states are invitations to act: message + action (redesign-plan §6). */
#note-list .list-empty {
  padding: 0.75rem 0.5rem;
  color: var(--text-secondary);
  font-size: 13px;
}
#note-list .list-empty .empty-query {
  display: block;
  color: var(--text);
  margin-top: 2px;
  word-break: break-word;
}
#note-list .list-empty .empty-action {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.3rem 0.6rem;
  font-size: 12.5px;
  border: 1px solid var(--border);
  background: var(--elevated-bg);
  color: var(--text);
}
#note-list .list-empty .empty-action:hover { background: var(--hover-bg); }

.note-item {
  position: relative;
  border-radius: var(--radius-control);
  margin-bottom: 2px;
}
.note-item:hover { background: var(--hover-bg); }
.note-item.is-active {
  background: var(--active-bg);
  box-shadow: inset 2px 0 0 var(--accent-surface);
}

.note-item .note-open {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.45rem 0.55rem;
  /* Clears the pin + duplicate + trash action cluster. */
  padding-right: 6rem;
}
.note-item .note-title {
  display: block;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.note-item .note-time {
  display: block;
  font-size: 12px;
  color: var(--text-meta);
  margin-top: 1px;
}

.note-item .note-actions {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  right: 0.35rem;
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: opacity var(--motion-control) ease;
}
.note-item:hover .note-actions,
.note-item:focus-within .note-actions { opacity: 1; }
.note-item.is-pinned .note-actions .action-pin { opacity: 1; color: var(--accent); }

.icon-button {
  padding: 0.4rem 0.45rem;
  line-height: 0;
  color: var(--text-secondary);
}
/* No hover on touch devices — the actions must simply be there. */
@media (hover: none) {
  .note-item .note-actions { opacity: 1; }
}
.icon-button:hover { background: var(--active-bg); color: var(--text); }
.icon-button.action-trash:hover { color: var(--danger); }

/* Trash rows keep visible text buttons — restore/delete must not hide.
   The title gets its own full-width line: on one line the two button labels
   consume the entire sidebar width and flex collapses the title to 0px,
   leaving two anonymous buttons — one of them permanent deletion. */
.note-item.trash-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem 0.4rem;
  padding: 0.45rem 0.55rem;
}
.note-item.trash-row .note-title { flex: 1 0 100%; min-width: 0; font-weight: 500; }
.note-item.trash-row button {
  flex: none;
  font-size: 12px;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--elevated-bg);
}
.note-item.trash-row button:hover { background: var(--hover-bg); }
.note-item.trash-row .trash-purge:hover { border-color: var(--danger); color: var(--danger); }

/* The title-as-disclosure. It must not pick up the pill styling the two action
   buttons share above — it is the row's heading, and reading as a third button
   beside "Delete permanently" is exactly the ambiguity to avoid. */
.note-item.trash-row .trash-title {
  flex: 1 0 100%;
  min-width: 0;
  text-align: left;
  font-weight: 500;
  font-size: 14px;
  border: none;
  background: none;
  padding: 0.1rem 0;
  min-height: 24px;
  color: var(--text);
  cursor: pointer;
}
.note-item.trash-row .trash-title:hover { color: var(--accent); background: none; }
.note-item.trash-row .trash-title::before {
  content: "\203A";
  display: inline-block;
  width: 0.85em;
  color: var(--text-meta);
  transition: transform 120ms ease;
}
.note-item.trash-row .trash-title[aria-expanded="true"]::before { transform: rotate(90deg); }
.trash-preview[hidden] { display: none; }
.trash-preview {
  flex: 1 0 100%;
  border-top: 1px solid var(--border);
  margin-top: 0.15rem;
  padding-top: 0.4rem;
}
.trash-preview-text {
  /* Monospace and pre-wrap: a trashed note may well be a diagram, and this is
     the last chance to see it before it is destroyed. Capped because the trash
     is a list, not a reading surface. */
  font-family: var(--font-code);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 11rem;
  overflow: auto;
  margin: 0;
  color: var(--text);
}
.trash-preview-text.is-empty { color: var(--text-meta); font-style: italic; }
.trash-preview-meta {
  margin: 0.35rem 0 0;
  font-size: 11px;
  color: var(--text-meta);
}

#undo-banner[hidden] { display: none; }
/* Kept out of the list's flow: an in-flow banner shifted the note rows under
   the cursor exactly while the user reached for Undo, and stole list height.
   Mobile (scrolling panel): sticky pins it above the footer while scrolled.
   Desktop (non-scrolling panel): absolute overlay — see the 768px block. */
#undo-banner {
  position: sticky;
  bottom: 0.6rem;
  margin: 0 0.6rem;
  z-index: 5;
  padding: 0.5rem 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 13px;
  background: var(--elevated-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  box-shadow: var(--sheet-shadow);
}
#undo-banner button {
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  font-size: 12px;
}
#undo-banner button:hover { background: var(--hover-bg); }

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 0.5rem 0.75rem 0.65rem;
}

#toggle-trash {
  width: 100%;
  text-align: left;
  padding: 0.4rem 0.5rem;
  color: var(--text-secondary);
  font-size: 13px;
}
#toggle-trash:hover { background: var(--hover-bg); color: var(--text); }

#backup-panel { margin-top: 0.25rem; }
#backup-panel summary {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.5rem;
  border-radius: var(--radius-control);
  color: var(--text-secondary);
  font-size: 13px;
  list-style: none;
}
#backup-panel summary::-webkit-details-marker { display: none; }
#backup-panel summary .summary-chevron {
  transition: transform var(--motion-control) ease;
}
#backup-panel[open] summary .summary-chevron { transform: rotate(90deg); }
#backup-panel summary:hover { background: var(--hover-bg); color: var(--text); }
#backup-panel .backup-actions {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.35rem 0.5rem 0.1rem;
}
#backup-panel .backup-actions button {
  text-align: left;
  font-size: 13px;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--elevated-bg);
}
/* 13px text with 0.35rem padding lands at 22.3px — just under the 24px
   target-size floor. Applies to the Drive buttons too, which share the row. */
.backup-actions button { min-height: 24px; }
#backup-panel .backup-actions button:hover { background: var(--hover-bg); }
#backup-status { font-size: 12px; color: var(--text-secondary); min-height: 1em; padding: 0.25rem 0.5rem; }

#drive-section[hidden] { display: none; }
#drive-section {
  margin-top: 0.4rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}
#drive-section .backup-actions { padding: 0 0.5rem; }
.drive-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-weight: 600;
}
.drive-primary svg { flex: none; }
.drive-status { font-size: 12px; color: var(--text-secondary); min-height: 1em; padding: 0.3rem 0.5rem 0; }
#drive-section .backup-actions button[hidden] { display: none; }

/* ---- Editor: the sheet -----------------------------------------------------
   The signature surface of Daylight Paper: the writing column is a sheet of
   paper on the cream desk. Full-bleed on mobile; edged, raised and centered
   from 768px up. The measure never exceeds ~68ch even as the pane widens. */

#editor-panel {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.editor-sheet {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  background: var(--elevated-bg);
}

.editor-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.3rem 0.6rem;
  width: 100%;
  padding: 0.75rem var(--space-1) 0.4rem;
}
.editor-header .note-heading {
  font-family: var(--font-writing);
  font-size: 20px;
  font-weight: 400;
  margin: 0;
  min-width: 0;
  flex: 1;
}

/* The filename control (docs/filename-plan.md §1.2): an always-editable input
   that reads as the note heading. The dotted underline is the at-rest
   editability cue — it must be visible without hover, because hover does not
   exist on touch devices. */
#note-name {
  font: inherit;
  display: block;
  width: 100%;
  min-width: 0;
  color: var(--text);
  background: transparent;
  border: none;
  border-bottom: 1px dotted var(--border);
  border-bottom-color: color-mix(in srgb, var(--text-secondary) 45%, transparent);
  border-radius: 0;
  padding: 0 0 2px;
  text-overflow: ellipsis;
}
#note-name:hover { border-bottom-color: var(--text-secondary); }
#note-name:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-bottom-color: transparent;
}

/* Mobile back control — hidden at >=768px where the list is always visible. */
#editor-back {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  flex: none;
  margin-left: -0.4rem;
  padding: 0.35rem 0.55rem 0.35rem 0.3rem;
  font-size: 13px;
  color: var(--accent);
}
#editor-back:hover { background: var(--hover-bg); }

.editor-tools {
  display: flex;
  align-items: center;
  /* 0.2rem, not 0.25: at 360px the row measured exactly as wide as the space
     available, so it wrapped on a rounding hair and cost 30px of header height
     on the commonest Android width. Trimming ~5px keeps 360px on one row while
     the wrap below still catches 320px. */
  gap: 0.2rem;
  /* Mobile: the tools take their own full row under back + title; a single
     row of nine controls would overflow a 375px sheet. Reset at >=768px. */
  flex: 1 0 100%;
  /* One row of tools still overflows at 320px — the WCAG 1.4.10 reflow width,
     measured at 328px of content in a 320px viewport. Wrapping costs a second
     row only on the narrowest screens; horizontal scroll would cost it on
     every interaction. */
  flex-wrap: wrap;
}
.editor-tools button {
  font-size: 13px;
  line-height: 1;
  padding: 0.35rem 0.5rem;
  color: var(--text-secondary);
  border: 1px solid transparent;
}
.editor-tools button:hover { background: var(--hover-bg); color: var(--text); }
.editor-tools button[aria-pressed="true"] { color: var(--accent); }
.editor-tools #toggle-history { border: 1px solid var(--border); margin-left: 0.35rem; }
.editor-tools #toggle-history[aria-pressed="true"] {
  color: var(--accent);
  border-color: currentColor;
}

textarea#editor {
  flex: 1;
  min-height: 0;
  width: 100%;
  font-family: var(--font-writing);
  font-size: 18px;
  /* Reading rhythm, not form-field rhythm (redesign-plan §3). */
  line-height: 1.7;
  background: transparent;
  color: var(--text);
  /* The sheet is the box; the amber caret is the focus. */
  border: none;
  resize: none;
  caret-color: var(--accent);
  padding: 0.4rem var(--space-1) var(--space-2);
}
textarea#editor:focus-visible { outline: none; }
textarea#editor::selection { background: var(--selection); }

/* Monospace writing mode. Only the writing surface swaps face — the filename
   heading and the rest of the chrome stay serif, so the app still reads as
   itself while a diagram keeps its columns. Source Serif 4's subsets carry no
   box-drawing glyphs (U+2500–257F), so those characters were already falling
   back to a system face at a different advance width; that mismatch is the
   misalignment this mode removes. The font-size here is deliberately below
   the serif's 18px: monospace faces set optically larger at equal px.
   editor.js sets the attribute and drives zoom off the same two values. */
:root[data-editor-font="mono"] textarea#editor {
  font-family: var(--font-code);
  font-size: 16px;
  line-height: 1.6;
}

#find-bar[hidden] { display: none; }
#find-bar {
  display: flex;
  align-items: center;
  /* 8px, not 5.6px: the minimum spacing between adjacent pointer targets. */
  gap: 0.5rem;
  flex-wrap: wrap;
  width: 100%;
  padding: 0.35rem var(--space-1) 0.5rem;
  font-size: 13px;
}
#find-bar input[type="text"] {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  padding: 0.3rem 0.5rem;
  min-width: 0;
}
#find-input { flex: 2 1 8rem; }
#replace-input { flex: 2 1 8rem; }
#find-count { color: var(--text-secondary); min-width: 2.5rem; text-align: center; font-variant-numeric: tabular-nums; }
#find-bar button {
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
}
#find-bar button:hover { background: var(--hover-bg); color: var(--text); }
.find-flag {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  user-select: none;
  /* The label is the real hit area — the 13px checkbox inside it is not.
     Measured at 19px tall, under the 24px WCAG 2.2 target-size minimum, and
     the find bar's gaps were too tight for the spacing exception to apply. */
  min-height: 24px;
  padding-inline: 0.15rem;
}
.find-flag input { accent-color: var(--accent-surface); }

/* The confirmation HUD (150ms in, 2s out, pointer-events none — it can
   confirm but never interrupt). */
#hud {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background: rgba(28, 25, 23, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 22px;
  padding: 26px 38px 22px;
  min-width: 150px;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  z-index: 100;
  transition: opacity 0.15s ease-out, transform 0.15s ease-out;
}
#hud.show { opacity: 1; transform: translate(-50%, -50%) scale(1); }
#hud.out { opacity: 0; transform: translate(-50%, -50%) scale(0.95); transition: opacity 2s, transform 2s; }
#hud .hud-mark {
  width: 84px;
  height: 84px;
  margin: 0 auto 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}
#hud .hud-label { color: #fff; font-size: 18px; font-weight: 700; }

/* Empty state — an invitation to act, not a blank void. */
.editor-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  text-align: center;
  padding: var(--space-3);
}
.editor-empty svg { margin-bottom: 0.75rem; opacity: 0.9; }
.editor-empty h2 {
  font-family: var(--font-writing);
  font-size: 26px;
  font-weight: 400;
  margin: 0;
}
.editor-empty p { margin: 0; color: var(--text-secondary); max-width: 34ch; }
.editor-empty button {
  margin-top: var(--space-1);
  padding: 0.5rem 1.1rem;
  font-weight: 600;
  color: var(--on-accent);
  background: var(--accent-surface);
}
.editor-empty button:hover { filter: brightness(1.06); }

/* ---- History panel ---------------------------------------------------------
   Mobile: a full-height sheet over the editor, with its own close control
   (the toggle underneath may be covered — redesign-plan §4). */

#history-panel {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  top: max(3rem, 8dvh);
  overflow-y: auto;
  background: var(--panel-bg);
  border-top: 1px solid var(--border);
  border-radius: var(--radius-dialog) var(--radius-dialog) 0 0;
  box-shadow: 0 -8px 32px rgba(28, 25, 23, 0.18);
  padding: 0.75rem var(--space-1);
  z-index: 10;
  transition: opacity var(--motion-panel) ease;
}
#history-panel[hidden] { display: none; }
.history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin: 0.1rem 0 0.6rem;
}
.history-head h2 {
  font-size: 14px;
  font-weight: 600;
  margin: 0;
}
#history-close {
  padding: 0.35rem 0.45rem;
  line-height: 0;
  color: var(--text-secondary);
}
#history-close:hover { background: var(--hover-bg); color: var(--text); }

#version-list { list-style: none; margin: 0; padding: 0; }
#version-list li { margin-bottom: 2px; }
#version-list > li > button {
  width: 100%;
  text-align: left;
  padding: 0.4rem 0.55rem;
  font-size: 13px;
  color: var(--text-secondary);
}
#version-list > li > button:hover { background: var(--hover-bg); color: var(--text); }
#version-list .version-empty { color: var(--text-secondary); font-size: 13px; padding: 0.4rem 0.55rem; }
#version-list .version-when { display: block; font-variant-numeric: tabular-nums; }
#version-list .version-snippet {
  display: block;
  margin-top: 1px;
  font-family: var(--font-writing);
  font-size: 12.5px;
  color: var(--text);
  opacity: 0.8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#version-preview { margin-top: 0.75rem; }
#version-preview pre {
  font-family: var(--font-writing);
  font-size: 13px;
  line-height: 1.6;
  background: var(--elevated-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  padding: 0.6rem 0.7rem;
  max-height: 40vh;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
#version-preview .restore-version {
  margin-top: 0.5rem;
  width: 100%;
  padding: 0.5rem 0.6rem;
  font-size: 13px;
  font-weight: 600;
  color: var(--on-accent);
  background: var(--accent-surface);
}
#version-preview .restore-version:hover { filter: brightness(1.06); }
#version-preview .restore-version:disabled { opacity: 0.6; filter: none; cursor: default; }
#version-preview .restore-caption {
  margin: 0.4rem 0 0;
  font-size: 12px;
  color: var(--text-secondary);
}
#history-notice { margin-top: 0.6rem; font-size: 13px; color: var(--danger); }

/* ---- Status bar -------------------------------------------------------------
   Two separate facts, always: what Heldnote stored, and what the browser
   promises about keeping it. They never merge and never share a color
   (redesign-plan §5). None of the functional colors is the brand accent. */

#status-bar {
  flex: none;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  padding: 0.35rem var(--space-1);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  background: var(--panel-bg);
}
#status-counts { margin-left: auto; font-variant-numeric: tabular-nums; }
#status-revision.state-saved { color: var(--ok); }
#status-revision.state-failed { color: var(--danger); }
#status-retention.state-warning { color: var(--warn); }
#status-retention.state-info { color: var(--info); }
#status-notice.state-warning { color: var(--warn); }
#status-notice[hidden] { display: none; }

/* The held indicator: a small dot that settles when a revision is stored.
   Calm, not celebratory. */
#status-revision.state-saved::before {
  content: "●";
  margin-right: 0.35rem;
  font-size: 9px;
  vertical-align: 1px;
  animation: settle var(--motion-panel) ease;
}
@keyframes settle {
  from { opacity: 0.2; }
  to { opacity: 1; }
}

/* ---- >= 768px: list + editor side by side --------------------------------- */

@media (min-width: 768px) {
  #app {
    display: grid;
    grid-template-columns: 264px minmax(0, 1fr);
    grid-template-rows: auto 1fr auto;
  }
  #app-notices { grid-column: 1 / -1; grid-row: 1; }

  /* Both panes are always visible; the mobile view switch is inert. */
  #app:not([data-view="editor"]) #editor-panel { display: flex; }
  #app[data-view="editor"] #notes-panel { display: flex; }

  #notes-panel {
    grid-column: 1;
    grid-row: 2;
    border-right: 1px solid var(--border);
    /* Footer stays pinned: the list scrolls internally, not the panel. */
    overflow-y: hidden;
  }
  #note-list { flex: 1; overflow-y: auto; }
  .sidebar-actions { position: static; }
  #undo-banner {
    position: absolute;
    left: 0.6rem;
    right: 0.6rem;
    bottom: 0.6rem;
    margin: 0;
  }
  #editor-panel {
    grid-column: 2;
    grid-row: 2;
    padding: var(--space-2) var(--space-2) 0;
    align-items: center;
  }
  #editor-back { display: none; }

  /* The sheet: raised paper, capped at a ~68ch measure (18px serif). */
  .editor-sheet {
    max-width: 46rem;
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: var(--radius-panel) var(--radius-panel) 0 0;
    box-shadow: var(--sheet-shadow);
  }
  .editor-header { padding: var(--space-1) var(--space-2) 0.4rem; flex-wrap: nowrap; }
  .editor-tools { flex: none; }
  #find-bar { padding: 0.35rem var(--space-2) 0.5rem; }
  textarea#editor { padding: 0.4rem var(--space-2) var(--space-3); }

  /* History overlays the editor from the right (tablet). */
  #history-panel {
    left: auto;
    top: 0;
    bottom: 0;
    width: min(340px, 42vw);
    border-radius: 0;
    border-top: none;
    border-left: 1px solid var(--border);
    box-shadow: -8px 0 32px rgba(28, 25, 23, 0.12);
  }

  #status-bar { grid-column: 1 / -1; grid-row: 3; flex-wrap: nowrap; }
}

/* ---- >= 1024px: history becomes a real third column ------------------------ */

@media (min-width: 1024px) {
  #app { grid-template-columns: 280px minmax(0, 1fr) auto; }
  #notes-panel { grid-column: 1; }
  #editor-panel { grid-column: 2; }
  #history-panel {
    position: static;
    grid-column: 3;
    grid-row: 2;
    width: 320px;
    min-height: 0;
    border-left: 1px solid var(--border);
    box-shadow: none;
    z-index: auto;
  }
  #history-close { display: none; }
}

/* --- Legal pages (/terms, /privacy) --------------------------------------
   Page-scoped under body.legal so nothing here can reach the app or /about.
   Long-form prose: a measure of ~68ch, generous leading, and headings that
   stay legible at the sizes a dense document actually needs. */

body.legal {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  line-height: 1.65;
  margin: 0;
  padding: var(--space-3) var(--space-1) var(--space-5);
}

body.legal main {
  max-width: 68ch;
  margin: 0 auto;
}

body.legal h1 {
  font-family: var(--font-writing);
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 var(--space-1);
}

body.legal h2 {
  font-size: 1.125rem;
  line-height: 1.3;
  margin: var(--space-3) 0 var(--space-1);
}

body.legal p,
body.legal li {
  font-size: 1rem;
  margin: 0 0 var(--space-1);
}

body.legal ul {
  padding-left: var(--space-2);
}

body.legal a {
  color: var(--accent);
}

body.legal .legal-meta,
body.legal .legal-updated {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* The plain-language summary above the numbered sections. */
body.legal .legal-summary {
  background: var(--panel-bg);
  border-left: 3px solid var(--accent);
  padding: var(--space-1);
  margin: 0 0 var(--space-3);
}

body.legal .legal-summary p:last-child {
  margin-bottom: 0;
}

body.legal .legal-footer {
  border-top: 1px solid var(--border);
  margin-top: var(--space-4);
  padding-top: var(--space-1);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Key inventory in the privacy policy: monospaced names, wrapping cleanly on
   narrow screens rather than forcing the page to scroll sideways. */
body.legal .legal-keys {
  font-family: var(--font-code);
  font-size: 0.875rem;
  list-style: none;
  padding-left: 0;
}

body.legal .legal-keys li {
  margin-bottom: 0.5rem;
  overflow-wrap: anywhere;
}

body.legal .legal-keys span {
  font-family: var(--font-ui);
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  body.legal { padding: var(--space-2) 1rem var(--space-4); }
  body.legal h1 { font-size: 1.625rem; }
}

/* The app's one route to the privacy policy. Sits with the status metadata
   and stays quiet: same secondary colour as its neighbours, underlined only
   on hover and focus so it reads as chrome rather than an action. */
#status-legal {
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
}

#status-legal:hover,
#status-legal:focus-visible {
  color: var(--text);
  text-decoration: underline;
}