/* Message Board — retro web-forum theme (T16).
   Direction (PRODUCT.md, binding): late-90s/early-2000s BBS/phpBB energy —
   dense numbered ledger rows, visible beveled borders (no rounded corners,
   no drop shadows), classic navy/maroon link colors, monospace accents over
   a readable Verdana-class body face, and a table-style header strip over
   the semantic <ol> (styling only — markup untouched).

   "Nostalgia with manners": every text/background pair in this palette was
   computed against WCAG AA (4.5:1 body text) and passes with headroom.
   Full pair list + ratios: docs/ultron/production-log.md, T16 entry. */

:root {
  color-scheme: light;

  /* Palette — each token checked for contrast (see log). */
  --paper: #e7e2d2;      /* page background            */
  --board: #f7f3e6;      /* board / row background     */
  --board-alt: #efe9d6;  /* alternating ledger rows    */
  --ink: #201a0e;        /* primary text               */
  --ink-soft: #4a4331;   /* meta / muted text          */
  --ink-ghost: #5c543f;  /* tombstoned post text       */
  --navy: #16307a;       /* classic link blue          */
  --maroon: #6d1a3d;     /* visited link               */
  --alert: #8b1a1a;      /* error red                  */
  --ok: #1e5c2a;         /* success green (R2)         */
  --err-bg: #f6e8dc;     /* error banner background    */
  --bar: #22304f;        /* board header bar           */
  --strip: #3d4c6e;      /* column-header strip        */
  --bar-ink: #fdf6e3;    /* text on dark bars          */
  --bar-dim: #c7d1ec;    /* secondary text on dark bar */
  --line: #8a8266;       /* borders                    */
  --line-dark: #6f6a55;  /* bevel shadow edges         */
  --bevel-hi: #fffdf2;   /* bevel highlight edges      */
  --btn-face: #ddd7c2;   /* button face                */
  --input-bg: #fffdf2;   /* input / textarea face      */
  --focus: #8b1a1a;      /* focus ring                 */

  --mono: "Courier New", Courier, ui-monospace, monospace;
  --body-face: Verdana, Geneva, Tahoma, sans-serif;
}

/* role=alert / role=status states (feed error banner, delete failure,
   composer status) rely on the `hidden` attribute. Class display rules
   below must never resurrect a hidden element — this guard makes sure. */
[hidden] {
  display: none !important;
}

/* ---------- Page frame ---------- */

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.45 var(--body-face);
}

::selection {
  background: var(--navy);
  color: var(--bar-ink);
}

/* Focus rings stay visible (T15): retro chrome never removes outlines. */
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

header :focus-visible {
  outline-color: var(--bar-ink);
}

/* ---------- Board header bar ---------- */

body > header {
  background: var(--bar);
  border-bottom: 4px double var(--line);
  padding: 10px 12px 9px;
}

body > header > h1,
body > header > p {
  max-width: 47rem;
  margin: 0 auto;
}

body > header h1 {
  font: bold 20px/1.2 var(--mono);
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--bar-ink);
}

#posting-as {
  margin-top: 4px;
  font: 12px/1.4 var(--mono);
  color: var(--bar-dim);
}

/* ---------- Main column ---------- */

main {
  max-width: 47rem;
  margin: 0 auto;
  padding: 14px 12px 48px;
}

/* ---------- Composer (classic inset panel form) ---------- */

#composer {
  border: 2px groove var(--line);
  background: var(--board);
  padding: 10px 12px 12px;
  margin: 0 0 16px;
}

.composer-field {
  margin: 0 0 8px;
}

#composer label {
  display: block;
  font: bold 11px/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--ink-soft);
  margin-bottom: 2px;
}

#composer input,
#composer textarea {
  box-sizing: border-box;
  width: 100%;
  border: 2px inset var(--line-dark);
  background: var(--input-bg);
  color: var(--ink);
  /* 16px floor (R1): smaller focus font sizes trigger iOS Safari zoom. */
  font: 16px/1.45 var(--body-face);
  padding: 3px 5px;
}

#composer textarea {
  resize: vertical;
}

.char-count {
  display: inline-block;
  margin-top: 1px;
  font: 11px/1.4 var(--mono);
  color: var(--ink-soft);
}

#composer-submit {
  font: bold 13px/1.2 var(--mono);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--ink);
  background: var(--btn-face);
  border: 2px solid;
  border-color: var(--bevel-hi) var(--line-dark) var(--line-dark) var(--bevel-hi);
  padding: 4px 18px;
  cursor: pointer;
}

#composer-submit:active:not(:disabled) {
  border-color: var(--line-dark) var(--bevel-hi) var(--bevel-hi) var(--line-dark);
}

#composer-submit:disabled {
  color: var(--ink-soft);
  cursor: default;
}

/* Status voice follows data-kind (R2): red stays failure-only.
   Contrast on --board: ok 7.22:1, busy 8.85:1, error 8.37:1 — all AA. */
#composer-status {
  margin: 6px 0 0;
  font: 12px/1.4 var(--mono);
  color: var(--alert); /* default/failure voice */
}

#composer-status[data-kind="ok"] {
  color: var(--ok);
}

#composer-status[data-kind="busy"] {
  color: var(--ink-soft);
}

/* ---------- Feed: strip + numbered corkboard ledger ---------- */

/* Table-style header strip. Styling only — the section keeps its
   aria-label="Recent posts" and the <ol> stays a semantic list. */
#feed::before {
  content: "Posts — newest first";
  display: block;
  background: var(--strip);
  color: var(--bar-ink);
  font: bold 11px/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-bottom: 0;
}

#post-list {
  list-style: decimal-leading-zero inside;
  margin: 0;
  padding: 0;
  background: var(--board);
  border: 1px solid var(--line);
}

#post-list li {
  margin: 0;
  padding: 4px 8px 5px;
  border-bottom: 1px solid var(--line);
}

#post-list li:nth-child(even) {
  background: var(--board-alt);
}

#post-list li:last-child {
  border-bottom: 0;
}

#post-list li::marker {
  font-family: var(--mono);
  font-weight: bold;
  color: var(--ink-soft);
}

.post-meta {
  margin: 0;
  font: 12px/1.4 var(--mono);
  color: var(--ink-soft);
}

.post-author {
  font-weight: bold;
  color: var(--ink);
}

.post-text {
  margin: 2px 0 0;
  font-size: 0.9375rem;
  overflow-wrap: anywhere;
}

/* Tombstoned rows: honest, muted, still legible. */
.post-removed .post-text {
  color: var(--ink-ghost);
  font-style: italic;
}

/* ---------- Buttons inside the feed (delete / confirm / retry) ---------- */

.post-actions {
  margin: 3px 0 0;
  font: 12px/1.5 var(--mono);
}

.post-actions button,
.feed-retry {
  font: bold 11px/1.3 var(--mono);
  color: var(--ink);
  background: var(--btn-face);
  border: 2px solid;
  border-color: var(--bevel-hi) var(--line-dark) var(--line-dark) var(--bevel-hi);
  /* 44px touch floor (R1): delete/confirm/retry sit side by side and must
     survive a thumb; the square bevel face is kept, just padded out. */
  box-sizing: border-box;
  min-height: 44px;
  padding: 10px 14px;
  margin-left: 4px;
  cursor: pointer;
}

.post-actions button:first-child,
.feed-retry:first-child {
  margin-left: 0;
}

.post-actions button:active:not(:disabled),
.feed-retry:active {
  border-color: var(--line-dark) var(--bevel-hi) var(--bevel-hi) var(--line-dark);
}

.post-actions button:disabled {
  color: var(--ink-soft);
  cursor: default;
}

.delete-confirm {
  color: var(--ink);
  font-weight: bold;
}

/* Inline failure (role=alert) + feed banner (role=alert). */
.delete-error {
  color: var(--alert);
  font-weight: bold;
}

.feed-error {
  margin: 6px 0 0;
  padding: 6px 8px;
  border: 2px solid var(--alert);
  background: var(--err-bg);
  color: var(--alert);
  font: 13px/1.5 var(--mono);
}

/* ---------- Footer landmark (R2) ---------- */

body > footer {
  max-width: 47rem;
  margin: 0 auto;
  padding: 8px 12px 28px;
  border-top: 1px solid var(--line);
  font: 11px/1.4 var(--mono);
  color: var(--ink-soft); /* 6.77:1 on --paper, AA */
}

body > footer p {
  margin: 0;
}

/* ---------- Empty state ---------- */

.feed-empty {
  margin: 0;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--board);
  color: var(--ink);
}

/* ---------- Small screens: same dense ledger, tighter gutters ---------- */

@media (max-width: 640px) {
  body > header {
    padding: 8px 8px 7px;
  }

  body > header h1 {
    font-size: 17px;
    letter-spacing: 2px;
  }

  main {
    padding: 10px 8px 40px;
  }

  #post-list li {
    padding: 4px 6px 5px;
  }

  #composer {
    padding: 8px;
  }

  body > footer {
    padding: 8px 8px 24px;
  }
}