/*
 * ScanChat app. See docs/DESIGN.md.
 * Layout: one ruled ledger sheet. A narrow index of people, a wide transcript. No cards, no shadows.
 * Colour carries one meaning: the alarm colour marks what someone else can read. Sealed things are solid bars.
 */
@font-face { font-family: "Archivo"; src: url("fonts/archivo.woff2") format("woff2"); font-weight: 100 900; font-stretch: 62% 125%; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/plex-mono-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/plex-mono-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url("fonts/plex-mono-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }

:root {
  --paper: #e9ede6;        /* safety paper */
  --sheet: #f6f8f3;        /* the writing surface */
  --ink: #15173f;          /* bank-note indigo */
  --ink-soft: #565a80;
  --rule: #c9cfcd;
  --exposed: #c2145d;      /* readable by someone other than the two of you */
  --exposed-wash: #f5dbe6;
  --plate: #15173f;        /* engraved plate behind the mark */
  --on-plate: #e9ede4;
  --plate-line: #8a8fd0;

  --display: "Archivo", "Arial Narrow", Arial, sans-serif;
  --text: "Archivo", system-ui, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --gut: max(16px, env(safe-area-inset-left, 0px));
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0b0c20;
    --sheet: #121433;
    --ink: #e6eae0;
    --ink-soft: #a3a7c8;
    --rule: #2b2e5c;
    --exposed: #ff6fae;
    --exposed-wash: #3b1531;
    --plate: #070816;
    --on-plate: #e6eae0;
    --plate-line: #6f74b8;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.5 var(--text); -webkit-text-size-adjust: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
a { color: inherit; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
input:focus-visible, textarea:focus-visible, select:focus-visible { outline-offset: -1px; }
#app { height: 100%; }
.boot { padding: 24px var(--gut); font-family: var(--mono); font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- type roles ---------- */
.label { font: 500 0.69rem/1.3 var(--mono); letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-soft); }
.mono { font-family: var(--mono); font-size: 0.86em; font-variant-numeric: tabular-nums; }
.display { font: 800 clamp(1.9rem, 4.2vw, 3.1rem)/1.02 var(--display); font-stretch: 118%; letter-spacing: -0.02em; text-wrap: balance; margin: 0; }
.h2 { font: 700 1.2rem/1.2 var(--display); font-stretch: 112%; letter-spacing: -0.01em; margin: 0; }
.soft { color: var(--ink-soft); }
.exposed { color: var(--exposed); }
.bar { display: inline-block; vertical-align: -0.08em; height: 0.82em; background: var(--ink); }

/* ---------- controls ---------- */
.btn {
  appearance: none; border: 1px solid var(--ink); background: var(--ink); color: var(--sheet);
  padding: 9px 16px; font: 600 0.9rem/1.2 var(--text); font-stretch: 106%; cursor: pointer; white-space: nowrap;
}
.btn { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.btn:hover:not(:disabled) { background: var(--ink-soft); border-color: var(--ink-soft); color: var(--sheet); }
.btn:disabled { opacity: 0.45; cursor: default; }
.btn--quiet { background: transparent; color: var(--ink); }
.btn--quiet:hover:not(:disabled), .btn--quiet[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--sheet); }
.btn--danger { background: transparent; color: var(--exposed); border-color: var(--exposed); }
.btn--danger:hover:not(:disabled) { background: var(--exposed); border-color: var(--exposed); color: var(--sheet); }
.btn--small { padding: 5px 12px; font-size: 0.8rem; min-height: 32px; }
.link { background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; color: inherit; font: inherit; }

.field { display: grid; gap: 6px; align-content: start; }
.field > label, .field > .label { min-height: 1.3em; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid var(--ink); background: var(--sheet); padding: 9px 11px; border-radius: 0; min-height: 42px; font-size: 0.95rem;
}
.field input::placeholder, textarea::placeholder { color: var(--ink-soft); opacity: 1; font-size: 0.95rem; }
.field input[type=file] { padding: 7px 8px; font-size: 0.85rem; }
.field textarea { font-family: var(--mono); font-size: 0.8rem; resize: vertical; min-height: 84px; word-break: break-all; }
.field .hint { font-size: 0.82rem; color: var(--ink-soft); }
.form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; align-items: center; }
.actions .grow { margin-right: auto; }
.status { font: 500 0.82rem/1.4 var(--mono); color: var(--ink-soft); min-height: 1.4em; }
.status.is-error { color: var(--exposed); }
.status.is-ok { color: var(--ink); }

/* ---------- onboarding: engraved plate on the left, form on the right ---------- */
.onboard { min-height: 100%; display: grid; grid-template-columns: minmax(280px, 5fr) 7fr; }
.plate {
  background: var(--plate); color: var(--on-plate); padding: 40px clamp(20px, 4vw, 56px);
  display: flex; flex-direction: column; justify-content: space-between; gap: 32px; position: relative; overflow: hidden;
}
.plate canvas { position: absolute; right: -22%; bottom: -14%; width: min(120%, 620px); aspect-ratio: 1; color: var(--plate-line); opacity: 0.55; pointer-events: none; }
.wordmark { font: 800 1.05rem/1 var(--display); font-stretch: 125%; letter-spacing: 0.14em; text-transform: uppercase; display: flex; align-items: center; gap: 10px; }
.wordmark canvas { position: static; width: 26px; height: 26px; opacity: 1; color: currentColor; }
.plate .display { position: relative; max-width: 14ch; }
.plate .label { color: var(--plate-line); position: relative; }
.plate-foot { position: relative; display: grid; gap: 6px; font-size: 0.9rem; max-width: 38ch; }
.onboard-main { padding: clamp(28px, 6vw, 72px) clamp(20px, 6vw, 80px); display: grid; align-content: center; gap: 22px; max-width: 720px; }
.onboard-main .lede { margin: 0; color: var(--ink-soft); max-width: 58ch; }
.consequence { border-left: 3px solid var(--exposed); padding: 2px 0 2px 14px; font-size: 0.92rem; max-width: 60ch; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 0; font-size: 0.92rem; }
.facts dt { font: 500 0.69rem/1.9 var(--mono); letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-soft); }
.facts dd { margin: 0; overflow-wrap: anywhere; }

/* ---------- the ledger ---------- */
.ledger { height: 100%; display: grid; grid-template-columns: 300px minmax(0, 1fr); background: var(--sheet); }
.index { border-right: 1px solid var(--ink); display: grid; grid-template-rows: auto minmax(0, 1fr) auto; min-height: 0; background: var(--paper); }
.index-head { padding: 16px 18px 14px; border-bottom: 1px solid var(--ink); display: grid; gap: 8px; }
.index-head .org { font-weight: 600; overflow-wrap: anywhere; }
.people { overflow-y: auto; padding: 8px 0; }
.people .label { padding: 8px 18px 6px; display: block; }
.person {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: baseline; gap: 8px; width: 100%;
  padding: 9px 18px; border: 0; background: none; text-align: left; cursor: pointer; border-left: 3px solid transparent;
}
.person:hover { background: color-mix(in srgb, var(--ink) 6%, transparent); }
.person.is-open { background: var(--sheet); border-left-color: var(--ink); }
.person .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.person .meta { font: 500 0.69rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); }
.person .count { font: 600 0.72rem/1 var(--mono); background: var(--ink); color: var(--sheet); padding: 3px 6px; }
.person.is-removed .name { text-decoration: line-through; color: var(--ink-soft); }
.index-empty { padding: 10px 18px; font-size: 0.9rem; color: var(--ink-soft); display: grid; gap: 10px; justify-items: start; }
.index-foot { border-top: 1px solid var(--ink); padding: 12px 18px 14px; display: grid; gap: 8px; }
.index-foot .me { font-weight: 600; overflow-wrap: anywhere; }
.index-foot nav { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 0.86rem; }
.warning { margin: 0 18px 8px; padding: 8px 10px; background: var(--exposed-wash); color: var(--exposed); font-size: 0.82rem; }

.thread { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; min-width: 0; min-height: 0; }
.thread-head { padding: 14px 24px 12px; border-bottom: 1px solid var(--ink); display: flex; align-items: center; gap: 14px; }
.thread-head .who { min-width: 0; margin-right: auto; display: grid; gap: 3px; }
.thread-head .back { display: none; }
.rows { overflow-y: auto; padding: 8px 24px 20px; }
.day { display: flex; align-items: center; gap: 12px; margin: 18px 0 8px; }
.day::before, .day::after { content: ""; flex: 1; height: 1px; background: var(--rule); }
.row { display: grid; grid-template-columns: 52px minmax(0, 1fr) auto; gap: 0 14px; padding: 5px 0; align-items: start; }
.row:has(.author) time { padding-top: 1px; }
.row:not(:has(.author)) time { line-height: 1.5rem; }
.row time { font: 400 0.74rem/1.9 var(--mono); color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.row .author { font-weight: 700; font-size: 0.86rem; font-stretch: 106%; display: block; }
.row.is-mine .author { color: var(--ink-soft); }
.row .body { white-space: pre-wrap; overflow-wrap: anywhere; max-width: 72ch; }
.row .failed { color: var(--exposed); font-size: 0.92rem; }
.wire-toggle { border: 0; background: none; cursor: pointer; padding: 6px 0 6px 8px; opacity: 0.35; line-height: 0; }
.wire-toggle:hover, .wire-toggle[aria-expanded="true"] { opacity: 1; }
.wire-toggle .bar { width: 22px; height: 7px; }

/* What the server held for a message. Readable fields in the alarm colour, the text as a bar. */
.slip { grid-column: 2 / -1; margin: 8px 0 10px; border: 1px dashed var(--ink-soft); padding: 12px 14px; display: grid; gap: 10px; max-width: 72ch; }
.slip dl { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 3px 16px; margin: 0; font: 400 0.78rem/1.6 var(--mono); }
.slip dt { color: var(--ink-soft); letter-spacing: 0.06em; text-transform: uppercase; font-size: 0.69rem; line-height: 1.9; }
.slip dd { margin: 0; overflow-wrap: anywhere; }
.slip .bar { width: min(100%, 300px); }
.slip p { margin: 0; font-size: 0.82rem; color: var(--ink-soft); }

.attachment { display: grid; gap: 8px; justify-items: start; margin-top: 2px; }
.attachment img, .attachment video { display: block; max-width: min(100%, 360px); max-height: 320px; border: 1px solid var(--ink); background: var(--paper); }
.attachment audio { width: min(100%, 360px); }
.file { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; border: 1px solid var(--ink); padding: 8px 12px; max-width: 100%; }
.file .fname { font-weight: 600; overflow-wrap: anywhere; }

.composer { border-top: 1px solid var(--ink); padding: 12px 24px calc(14px + env(safe-area-inset-bottom, 0px)); display: grid; gap: 6px; background: var(--sheet); }
.composer-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; gap: 10px; align-items: end; }
.composer textarea { width: 100%; border: 1px solid var(--ink); background: var(--paper); padding: 9px 11px; resize: none; min-height: 42px; max-height: 160px; border-radius: 0; line-height: 1.4; }

.blank { display: grid; align-content: center; justify-items: start; gap: 18px; padding: clamp(24px, 6vw, 72px); max-width: 760px; }
.blank canvas { width: 132px; height: 132px; color: var(--ink); }
.knows { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border: 1px solid var(--ink); width: 100%; }
.knows > div { padding: 14px 16px; display: grid; gap: 8px; align-content: start; }
.knows > div + div { border-left: 1px solid var(--ink); }
.knows ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 5px; font-size: 0.92rem; }
.knows .bar { width: 100%; max-width: 190px; }

/* ---------- dialogs ---------- */
dialog { border: 1px solid var(--ink); background: var(--sheet); color: var(--ink); padding: 0; width: min(640px, calc(100vw - 32px)); max-height: calc(100dvh - 48px); }
dialog::backdrop { background: color-mix(in srgb, var(--plate) 62%, transparent); }
.dlg { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; max-height: inherit; }
.dlg-head { padding: 16px 20px 12px; border-bottom: 1px solid var(--ink); display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.dlg-body { padding: 18px 20px; overflow-y: auto; display: grid; gap: 20px; }
.dlg-foot { padding: 12px 20px 16px; border-top: 1px solid var(--rule); }
.roster { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.roster th { text-align: left; font: 500 0.69rem/1.3 var(--mono); letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-soft); padding: 0 10px 6px 0; border-bottom: 1px solid var(--ink); }
.roster td { padding: 8px 10px 8px 0; border-bottom: 1px solid var(--rule); vertical-align: middle; }
.roster td:last-child, .roster th:last-child { text-align: right; padding-right: 0; }
.safety { font: 600 clamp(1.15rem, 4.4vw, 1.7rem)/1.5 var(--mono); letter-spacing: 0.04em; font-variant-numeric: tabular-nums; border: 1px solid var(--ink); padding: 14px 16px; text-align: center; }
.section { display: grid; gap: 12px; }

/* ---------- narrow screens: one pane at a time ---------- */
@media (max-width: 760px) {
  .onboard { grid-template-columns: 1fr; }
  .plate { padding: 24px var(--gut); gap: 20px; }
  .plate canvas { width: 300px; right: -90px; bottom: -110px; }
  .plate-foot { display: none; }
  .onboard-main { padding: 24px var(--gut) 40px; align-content: start; }
  .form-row { grid-template-columns: 1fr; }
  .ledger { grid-template-columns: 1fr; }
  .ledger .thread { display: none; }
  .ledger.has-peer .index { display: none; }
  .ledger.has-peer .thread { display: grid; }
  .index { border-right: 0; }
  .thread-head, .rows, .composer { padding-left: var(--gut); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
  .thread-head .back { display: inline-block; }
  .thread-head .suite { display: none; }
  .row { grid-template-columns: 44px minmax(0, 1fr) auto; gap: 0 10px; }
  .knows { grid-template-columns: 1fr; }
  .knows > div + div { border-left: 0; border-top: 1px solid var(--ink); }
}
@media (prefers-reduced-motion: no-preference) {
  .row.is-new { animation: settle 0.22s ease-out; }
  @keyframes settle { from { opacity: 0; transform: translateY(3px); } }
}

/* ---------- background checks above the composer ---------- */
.checks { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; min-height: 26px; font: 500 0.72rem/1.2 var(--mono); }
.checks.is-running { opacity: 0.6; }
.check { display: inline-flex; align-items: center; gap: 5px; padding: 3px 8px; border: 1px solid var(--rule); background: var(--sheet); color: var(--ink); }
.check::before { content: ""; width: 7px; height: 7px; background: var(--ink); }
.check.is-warn { border-color: var(--ink-soft); color: var(--ink-soft); }
.check.is-warn::before { background: transparent; border: 1px solid var(--ink-soft); }
.check.is-bad { border-color: var(--exposed); color: var(--exposed); }
.check.is-bad::before { background: var(--exposed); }
button.check { cursor: pointer; font: inherit; }
button.check:hover { background: var(--ink); color: var(--sheet); border-color: var(--ink); }
.check-time { color: var(--ink-soft); margin-left: auto; }

/* ---------- disappearing messages ---------- */
.timer-pick { border: 1px solid var(--ink); background: var(--sheet); color: var(--ink); min-height: 42px; padding: 0 8px; border-radius: 0; font: 500 0.8rem var(--mono); max-width: 9.5rem; }
.timer-pick.is-on { background: var(--ink); color: var(--sheet); }
.sealed { display: inline-flex; align-items: center; gap: 10px; border: 1px solid var(--ink); background: var(--sheet); color: var(--ink); padding: 8px 12px; cursor: pointer; text-align: left; font-size: 0.88rem; max-width: 100%; }
.sealed .bar { width: 46px; flex: none; }
.sealed b { font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.sealed:hover { background: var(--ink); color: var(--sheet); }
.sealed:hover .bar { background: var(--sheet); }
.timed { display: grid; gap: 4px; }
.timer-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.timer { font: 500 0.72rem/1.3 var(--mono); color: var(--ink-soft); letter-spacing: 0.02em; }
.timer[data-expires] { color: var(--ink); font-variant-numeric: tabular-nums; }

/* ---------- message details ---------- */
.more { background: none; border: 1px solid transparent; color: var(--ink-soft); font: 500 0.7rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; padding: 5px 6px; cursor: pointer; opacity: 0; }
.row:hover .more, .more:focus-visible, .more[aria-expanded="true"] { opacity: 1; }
.more:hover { border-color: var(--ink); color: var(--ink); }
@media (hover: none) { .more { opacity: 0.7; } }
.row .details { grid-column: 2 / -1; margin: 8px 0 6px; border-left: 2px solid var(--ink); padding: 4px 0 4px 14px; display: grid; gap: 14px; }
.details section { display: grid; gap: 6px; }
.details dl { margin: 0; display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 4px 14px; font-size: 0.84rem; }
.details dt { color: var(--ink-soft); }
.details dd { margin: 0; overflow-wrap: anywhere; }
.details dd .bar { width: 120px; }
@media (max-width: 560px) { .details dl { grid-template-columns: 1fr; } .details dt { margin-top: 4px; } }

/* ---------- people with the same name ---------- */
.dev { color: var(--exposed); font-weight: 500; }
.person.is-dup .name { color: var(--ink); }

/* ---------- hide text ---------- */
.thread.is-private .row .body, .thread.is-private .attachment img, .thread.is-private .attachment video { filter: blur(7px); transition: filter 0.15s; }
.thread.is-private .row:hover .body, .thread.is-private .row:focus-within .body,
.thread.is-private .row:hover img, .thread.is-private .row:hover video { filter: none; }

/* ---------- QR ---------- */
.qr { width: 220px; height: auto; max-width: 100%; image-rendering: pixelated; display: block; border: 1px solid var(--ink); }
.verify-grid { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 20px; align-items: start; }
.verify-qr { display: grid; gap: 8px; justify-items: start; }
.verify-how { display: grid; gap: 10px; }
.verify-how .actions { justify-content: flex-start; }
.cam { width: 100%; max-width: 320px; aspect-ratio: 1; object-fit: cover; border: 1px solid var(--ink); background: var(--plate); display: block; }
.invite-qr { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.invite-qr .qr { width: 180px; }
@media (max-width: 560px) {
  .verify-grid { grid-template-columns: 1fr; }
  .composer-row { grid-template-columns: auto minmax(0, 1fr) auto; }
  .composer-row .timer-pick { grid-column: 1 / -1; grid-row: 2; max-width: none; }
}