/* Retro ASCII/BBS terminal styling.
 *
 * Theme palettes are CSS custom properties switched by a `theme-*` class on the
 * root element (see src/theme.rs). Per-zone accent colours are applied inline
 * via `--accent` from each zone's `accent_hex`.
 */

:root {
  --bg: #0a0a0a;
  --bg-panel: #0f0f0f;
  --fg: #ffb000;       /* amber default */
  --fg-bright: #ffd47a;
  --fg-dim: #c48a2a;   /* readable dim: subtitles/handles/hints stay legible on #0a0a0a */
  --accent: #ffb000;
  --border: #6b4a00;
  --select-bg: #ffb000;
  --select-fg: #0a0a0a;
  --font: "Cascadia Mono", "JetBrains Mono", "Fira Code", "DejaVu Sans Mono",
    Menlo, Consolas, monospace;
}

/* ── Theme palettes ──────────────────────────────────────────────────────── */
.theme-amber {
  --fg: #ffb000; --fg-bright: #ffd47a; --fg-dim: #c48a2a;
  --accent: #ffb000; --border: #6b4a00; --select-bg: #ffb000;
}
.theme-green {
  --fg: #33ff66; --fg-bright: #b6ffc8; --fg-dim: #43b869;
  --accent: #33ff66; --border: #1f7a3a; --select-bg: #33ff66;
}
.theme-purple {
  --fg: #c792ea; --fg-bright: #e6ccff; --fg-dim: #a483c8;
  --accent: #c792ea; --border: #5a3f80; --select-bg: #c792ea;
}
.theme-sky {
  --fg: #56c2ff; --fg-bright: #b6e6ff; --fg-dim: #59a3cc;
  --accent: #56c2ff; --border: #2a6f99; --select-bg: #56c2ff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  /* Phosphor burn in the shadows: the dark areas are never dead black — they
     carry a faint theme-tinted phosphor residue that lifts toward the centre. */
  background:
    radial-gradient(ellipse 120% 100% at 50% 50%,
      color-mix(in srgb, var(--accent) 5%, var(--bg)) 0%, var(--bg) 70%);
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.45;
}

/* CRT scanlines + subtle flicker + vignette. */
.bbs-crt::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.15) 3px,
    rgba(0, 0, 0, 0.15) 4px
  );
}
.bbs-crt::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 49;
  /* Phosphor burn-in: a broad theme-tinted bloom that lights the screen from
     within and pools in the shadows, over a darkened-edge vignette. Kept well
     below text brightness so glyphs stay crisp. */
  background:
    radial-gradient(ellipse 95% 80% at 50% 48%,
      color-mix(in srgb, var(--accent) 14%, transparent) 0%,
      color-mix(in srgb, var(--accent) 6%, transparent) 40%,
      rgba(0,0,0,0) 72%),
    radial-gradient(ellipse at center, rgba(0,0,0,0) 52%, rgba(0,0,0,0.62) 100%);
}

/* Fill the viewport so the terminal is a full-screen CRT rather than a block
   floating in a void; the footer then pins to the bottom edge. */
.bbs-crt { min-height: 100vh; }
@keyframes crt-flicker { 0%,100% { opacity: 1; } 50% { opacity: 0.97; } }

.bbs-root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* Body copy carries only a hairline halo so glyphs stay crisp; the strong
     phosphor bloom is re-applied below to headings / chrome / accents where it
     reads as glow rather than smearing the text. */
  text-shadow: 0 0 1.5px color-mix(in srgb, var(--accent) 55%, transparent);
  animation: crt-flicker 6s infinite;
  padding: 0.5rem 1rem;
  max-width: 100ch;
  margin: 0 auto;
}

/* Strong phosphor glow, scoped to the bright/large/accent elements. */
.bbs-banner,
.bbs-panel .title,
.bbs-menu-item,
.bbs-fkeys .fk,
.bbs-row .accent,
.bbs-section-hero .label,
.bbs-statusbar .ok {
  text-shadow: 0 0 4px var(--accent);
}

/* ── Status bar ──────────────────────────────────────────────────────────── */
.bbs-statusbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.25rem;
  color: var(--fg-dim);
  font-size: 0.85rem;
  flex-wrap: wrap;
}
.bbs-statusbar .ok { color: var(--accent); }
.bbs-statusbar .bad { color: #ff5555; }

/* ── Banner ──────────────────────────────────────────────────────────────── */
.bbs-banner {
  white-space: pre;
  color: var(--fg-bright);
  margin: 0.5rem 0;
  font-size: 0.78rem;
  line-height: 1.1;
  overflow-x: auto;
}
.bbs-banner .tagline { color: var(--fg-dim); }

/* ── Generic boxed panel ─────────────────────────────────────────────────── */
.bbs-panel { white-space: pre-wrap; margin: 0.5rem 0; }
/* Screen header line — the "you are here" signpost. Bright, weighted, and
   spaced so each section reads as a distinct place rather than more body text. */
.bbs-panel .title {
  color: var(--fg-bright);
  font-weight: bold;
  letter-spacing: 0.04em;
}

/* ── Main menu ───────────────────────────────────────────────────────────── */
.bbs-menu { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; }
@media (max-width: 640px) { .bbs-menu { grid-template-columns: 1fr; } }
.bbs-menu-item {
  cursor: pointer;
  padding: 0 0.25rem;
  white-space: pre;
}
.bbs-menu-item .key { color: var(--accent); }
.bbs-menu-item.selected, .bbs-menu-item:hover {
  background: var(--select-bg);
  color: var(--select-fg);
  text-shadow: none;
}
.bbs-menu-item.selected .key { color: var(--select-fg); }

/* ── Lists (boards, files, nodes, users) ─────────────────────────────────── */
.bbs-list { margin: 0.25rem 0; }
.bbs-row { white-space: pre; padding: 0 0.25rem; cursor: pointer; }
.bbs-row.selected, .bbs-row:hover {
  background: var(--select-bg); color: var(--select-fg); text-shadow: none;
}
.bbs-row .accent { color: var(--accent); }
.bbs-row.selected .accent { color: var(--select-fg); }
.bbs-dim { color: var(--fg-dim); }

/* ── Command line + footer ───────────────────────────────────────────────── */
.bbs-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding-top: 0.25rem;
  color: var(--fg-dim);
  font-size: 0.8rem;
}
.bbs-fkeys { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.bbs-fkeys .fk { color: var(--accent); }
.bbs-cmdline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 0.25rem;
}
.bbs-cmdline .prompt { color: var(--accent); }
.bbs-cmdline input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg-bright);
  font: inherit;
  text-shadow: inherit;
}
.bbs-blink { animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* Motion-sensitivity: silence the full-screen CRT flicker and the cursor blink
   for users who ask for reduced motion (the phosphor-ghost + sentry already are). */
@media (prefers-reduced-motion: reduce) {
  .bbs-root { animation: none; }
  .bbs-blink { animation: none; }
}

/* Clickable text controls (governance Approve/Reject, [send], [reply], sign-in,
   theme-cycle, sentry door) carry role="button" — give them a pointer cursor so
   they read as interactive, not static text (verify-live: cursor was `auto`). */
a, .bbs-link { color: var(--accent); }
.bbs-link, [role="button"] { cursor: pointer; }
.bbs-link:hover { color: var(--fg-bright); }

/* ── ASCII image rendering ───────────────────────────────────────────────────
 * Images everywhere in the BBS are converted to ASCII server-side (preview /
 * pod workers) and injected as <pre class="ascii-img"> fragments whose cells
 * carry phosphor levels p0..p7. The levels map to a ramp from background to the
 * active theme's bright phosphor via color-mix on the EXISTING theme vars, so
 * they auto-recolour across all four themes with no per-theme duplication. */
.bbs-ascii-row { margin: 0.4rem 0; }
.bbs-banner-img { margin: 0.5rem 0 0; }
.ascii-img-wrap { overflow-x: auto; }

/* Content ASCII images (File Base, Message Base posts) read as contained
   "files" — a subtle phosphor-framed box with a small label. The masthead
   banner (.bbs-banner-img) is exempt so it stays edge-to-edge. */
.bbs-ascii-row:not(.bbs-banner-img) {
  width: max-content;
  max-width: 100%;
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  background: color-mix(in srgb, var(--accent) 3%, var(--bg));
}
.bbs-ascii-row:not(.bbs-banner-img)::before {
  content: "▞ IMG ▚";
  display: inline-block;
  margin-bottom: 0.3rem;
  padding: 0 0.4rem;
  background: var(--fg-dim);
  color: var(--bg);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-shadow: none;
}
.ascii-img {
  margin: 0;
  font-family: var(--font);
  font-size: 0.6rem;
  line-height: 1;
  letter-spacing: 0;
  white-space: pre;
  overflow-x: auto;
  text-shadow: 0 0 2px currentColor; /* per-cell phosphor glow */
}
.ascii-img-status {
  font-size: 0.8rem;
  line-height: 1.2;
  color: var(--fg-dim);
  text-shadow: 0 0 3px var(--accent);
}

/* Phosphor ramp: background → bright phosphor, eased so midtones aren't muddy. */
.ascii-img .p0 { color: color-mix(in srgb, var(--fg-bright)  6%, var(--bg)); }
.ascii-img .p1 { color: color-mix(in srgb, var(--fg-bright) 12%, var(--bg)); }
.ascii-img .p2 { color: color-mix(in srgb, var(--fg-bright) 20%, var(--bg)); }
.ascii-img .p3 { color: color-mix(in srgb, var(--fg-bright) 31%, var(--bg)); }
.ascii-img .p4 { color: color-mix(in srgb, var(--fg-bright) 45%, var(--bg)); }
.ascii-img .p5 { color: color-mix(in srgb, var(--fg-bright) 62%, var(--bg)); }
.ascii-img .p6 { color: color-mix(in srgb, var(--fg-bright) 80%, var(--bg)); }
.ascii-img .p7 { color: var(--fg-bright); }

/* ── Section heroes ──────────────────────────────────────────────────────────
 * Each configured zone's banner image rendered as ASCII at the top of the
 * Message Base, tinted to the zone accent. */
.bbs-section-hero { margin: 0.3rem 0 0.6rem; }
/* Each zone's banner gets a filled accent chip label — a strong, unmistakable
   signpost of which zone this board belongs to (tinted to the zone accent_hex). */
.bbs-section-hero .label {
  display: inline-block;
  background: color-mix(in srgb, var(--accent) 88%, var(--bg));
  color: var(--bg);
  padding: 0.1rem 0.55rem;
  margin-bottom: 0.2rem;
  font-weight: bold;
  letter-spacing: 0.1em;
  text-shadow: none;
}

/* ── Phosphor persistence ─────────────────────────────────────────────────────
 * When the screen text changes, the previous frame lingers as a faint phosphor
 * afterglow and fades linearly to nothing — the slow decay of a real tube. The
 * ghost is a text-only clone of the prior body region injected by the small
 * script in index.html; here we only define how it looks + decays. */
.phosphor-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 48;
  overflow: hidden;
  white-space: pre;
  will-change: opacity;
  opacity: 0.05;                     /* faint */
  transition: opacity 3s linear;     /* slow, even decay to zero */
}
@media (prefers-reduced-motion: reduce) { .phosphor-ghost { display: none; } }

/* ── Mobile / touch ──────────────────────────────────────────────────────────
 * First-class mobile: a single-column terminal that fills the dynamic viewport
 * (100dvh dodges the mobile browser-chrome gap), larger touch targets, and a
 * fitted banner. Touch navigation (slide to move the highlight, release to
 * select) is driven by the small script in index.html; `touch-action: none` on
 * the selectable lists hands those gestures to it instead of the browser. */
.bbs-root, .bbs-crt { min-height: 100vh; min-height: 100dvh; }
.bbs-menu, .bbs-list { touch-action: none; }

@media (max-width: 640px) {
  html, body { font-size: 13px; }
  .bbs-root { padding: 0.3rem 0.5rem; max-width: 100%; }

  /* Single full-screen list, zoomed: the masthead banner is dropped (the
     status bar already carries the node name) and the active list fills the
     viewport as large, finger-sized rows — a mobile-app-style menu rather than
     a compact block floating up top. */
  .bbs-banner { display: none; }
  .bbs-statusbar { font-size: 0.78rem; }

  .bbs-menu {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    gap: 0;
    margin: 0.3rem 0;
  }
  .bbs-menu-item {
    flex: 1 1 0;                       /* rows grow to fill the screen evenly */
    display: flex;
    align-items: center;
    font-size: 1.45rem;               /* zoomed */
    padding: 0 0.7rem;
    border-bottom: 1px solid var(--border);
  }
  .bbs-menu-item:first-child { border-top: 1px solid var(--border); }
  .bbs-menu-item .key { margin-right: 0.5rem; }

  /* Dynamic lists fill + scroll, with large rows. */
  .bbs-list {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    overflow-y: auto;
    margin: 0.3rem 0;
  }
  .bbs-row {
    display: flex;
    align-items: center;
    min-height: 3rem;
    font-size: 1.15rem;
    padding: 0.6rem 0.7rem;
    border-bottom: 1px solid var(--border);
  }
  .bbs-panel { flex: 1 1 auto; }

  /* No decorative banners anywhere on mobile — the zone "section hero" banners
     are dropped too (the masthead already is). Content images survive: posted
     pictures (.bbs-ascii-row) and link previews still render as ASCII. */
  .bbs-section-hero { display: none; }

  /* Posted/preview ASCII images stay, sized to the narrow column (kept legible;
     wide art scrolls horizontally in its own container rather than shrinking away). */
  .ascii-img { font-size: 0.5rem; }

  /* Keyboard hints are meaningless without a keyboard — swap them for a touch
     hint. Slide over rows to move the highlight, lift to select; swipe down
     from the top to jump back to the full menu (see the script in index.html). */
  .bbs-fkeys { display: none; }
  .bbs-footer::before {
    content: "swipe to move \00B7 tap to select \00B7 \2193 from top = menu";
    display: block;
    margin-bottom: 0.15rem;
    color: var(--fg-dim);
    font-size: 0.72rem;
  }
  .bbs-cmdline input { font-size: 16px; }                /* stop iOS focus-zoom */
}

/* ── Door game: UA 571-C sentry gun ───────────────────────────────────────────
 * A faithful Aliens (1986) UA 571-C remote-sentry control deck — but rendered
 * in OUR phosphor skin: it inherits the active theme's --accent/--fg/--bg via
 * the theme-* class copied onto the overlay, with our scanlines + glow. Pure
 * client-side, no auth. Logic in the script in index.html. */
.sentry {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  flex-direction: column;
  overflow: auto;
  padding: 1rem;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  text-shadow: 0 0 4px var(--accent);
}
.sentry.open { display: flex; }
.sentry::before {                                   /* scanlines */
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 2;
  background: repeating-linear-gradient(to bottom,
    rgba(0,0,0,0) 0, rgba(0,0,0,0) 2px, rgba(0,0,0,0.26) 3px, rgba(0,0,0,0.26) 4px);
}
.sentry::after {                                    /* phosphor bloom + vignette */
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 1;
  background:
    radial-gradient(ellipse 95% 80% at 50% 45%, color-mix(in srgb, var(--accent) 12%, transparent) 0%, rgba(0,0,0,0) 70%),
    radial-gradient(ellipse at center, rgba(0,0,0,0) 55%, rgba(0,0,0,0.6) 100%);
}
.sentry-inner { position: relative; z-index: 3; max-width: 96ch; width: 100%; margin: 0 auto; }
.sentry-boot { white-space: pre-wrap; color: var(--fg-bright); min-height: 8rem; }
.sentry-close {
  position: fixed; top: 0.6rem; right: 1rem; z-index: 4; cursor: pointer;
  color: var(--fg-bright); border: 1px solid var(--border); padding: 0.1rem 0.5rem;
}
.sentry-close:hover { background: var(--accent); color: var(--bg); text-shadow: none; }
.sentry-title {
  text-align: center; color: var(--fg-bright); letter-spacing: 0.18em;
  border: 1px solid var(--border); padding: 0.5rem; margin-bottom: 0.6rem; white-space: pre;
}
.sentry-modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem; margin-bottom: 0.6rem; }
.sentry-cell { border: 1px solid var(--border); padding: 0.4rem 0.5rem; }
.sentry-cell .lab { color: var(--fg-dim); font-size: 0.78rem; letter-spacing: 0.08em; }
.sentry-opts { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-top: 0.3rem; }
.sentry-opt { padding: 0.15rem 0.45rem; border: 1px solid var(--border); cursor: pointer; user-select: none; }
.sentry-opt.sel { background: var(--accent); color: var(--bg); text-shadow: none; }
.sentry-opt.danger.sel { background: #ff5555; color: #0a0a0a; }
.sentry-status { display: grid; grid-template-columns: 1.4fr 1fr 0.8fr auto; gap: 0.6rem; align-items: stretch; }
.sentry-box { border: 1px solid var(--border); padding: 0.4rem 0.5rem; display: flex; flex-direction: column; justify-content: center; }
.sentry-box .lab { color: var(--fg-dim); font-size: 0.78rem; }
.sentry-rounds { font-size: 2.4rem; line-height: 1; color: var(--fg-bright); }
.sentry-time { font-size: 1.6rem; color: var(--fg-bright); }
.sentry-critical { border: 2px solid #ff5555; color: #ff5555; text-align: center; padding: 0.4rem; opacity: 0.22; letter-spacing: 0.2em; }
.sentry-critical.on { opacity: 1; animation: sentry-flash 0.5s step-end infinite; }
@keyframes sentry-flash { 50% { opacity: 0.3; } }
.sentry-gaugewrap { display: flex; gap: 0.5rem; align-items: flex-end; }
.sentry-gauge { width: 1.4rem; height: 5rem; border: 1px solid var(--border); position: relative; }
.sentry-gauge .fill { position: absolute; left: 0; right: 0; bottom: 0; background: var(--accent); transition: height 0.4s linear; }
.sentry-gauge.hot .fill { background: #ff5555; }
.sentry-gauge .gl { position: absolute; top: -1rem; left: 0; color: var(--fg-dim); font-size: 0.7rem; }
.sentry-radar { width: 6rem; height: 6rem; border-radius: 50%; border: 1px solid var(--border); position: relative; overflow: hidden; align-self: center; }
.sentry-radar::before {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, color-mix(in srgb, var(--accent) 45%, transparent) 0deg, transparent 60deg);
  animation: sentry-sweep 2.6s linear infinite;
}
.sentry-radar.fast::before { animation-duration: 0.9s; }
.sentry-radar .ring { position: absolute; inset: 22%; border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); border-radius: 50%; }
.sentry-radar .ring.r2 { inset: 40%; }
@keyframes sentry-sweep { to { transform: rotate(360deg); } }
.sentry-actions { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; margin: 0.7rem 0; }
.sentry-btn { border: 1px solid var(--accent); color: var(--accent); padding: 0.45rem 0.9rem; cursor: pointer; letter-spacing: 0.06em; user-select: none; }
.sentry-btn:hover { background: var(--accent); color: var(--bg); text-shadow: none; }
.sentry-btn.armed { border-color: #ff5555; color: #ff5555; }
.sentry-log { border: 1px solid var(--border); padding: 0.4rem 0.5rem; margin-top: 0.4rem; min-height: 3.5rem; max-height: 8rem; overflow-y: auto; color: var(--fg-dim); font-size: 0.85rem; white-space: pre-wrap; }
.sentry-log .hi { color: var(--fg-bright); }
.sentry-hint { text-align: center; color: var(--fg-dim); font-size: 0.78rem; margin-top: 0.4rem; }
@media (max-width: 640px) {
  .sentry { padding: 0.5rem; }
  .sentry-modes { grid-template-columns: 1fr; }
  .sentry-status { grid-template-columns: 1fr; }
  .sentry-title { letter-spacing: 0.1em; font-size: 0.85rem; }
}
@media (prefers-reduced-motion: reduce) {
  .sentry-critical.on { animation: none; }
  .sentry-radar::before { animation: none; }
}