/* Blind Chess Terminal — styles. Themes are sets of CSS variables. */

:root,
[data-theme='phosphor'] {
  --bg: #030603;
  --bg2: #0b1a0d;
  --win: #070b07;
  --bar: #0c140c;
  --border: #1b3a1f;
  --fg: #49e36b;
  --dim: #2f8f46;
  --hl: #c8ffd2;
  --accent: #ffd75e;
  --ok: #5dff8f;
  --warn: #ffc24b;
  --err: #ff6b5e;
  --num: #3aa858;
  --you: #e9ffe9;
  --opp: #8ee8ff;
  --card: rgba(73, 227, 107, 0.04);
  --chip: rgba(73, 227, 107, 0.06);
  --sq-light: #9cbf8f;
  --sq-dark: #4e7d4a;
  --glow: rgba(73, 227, 107, 0.35);
  --select: rgba(73, 227, 107, 0.3);
  --dot1: #ff5f56;
  --dot2: #ffbd2e;
  --dot3: #27c93f;
}

[data-theme='amber'] {
  --bg: #070400;
  --bg2: #1a0f00;
  --win: #0c0700;
  --bar: #140c02;
  --border: #3d2a08;
  --fg: #ffb02e;
  --dim: #a86f12;
  --hl: #ffe2a8;
  --accent: #fff1c9;
  --ok: #ffd36b;
  --warn: #ff9a3c;
  --err: #ff6040;
  --num: #c7861d;
  --you: #fff4dc;
  --opp: #ffcf7a;
  --card: rgba(255, 176, 46, 0.05);
  --chip: rgba(255, 176, 46, 0.07);
  --sq-light: #d8b47a;
  --sq-dark: #9a6b33;
  --glow: rgba(255, 176, 46, 0.35);
  --select: rgba(255, 176, 46, 0.3);
}

[data-theme='ice'] {
  --bg: #02060c;
  --bg2: #071a2a;
  --win: #050b13;
  --bar: #08121e;
  --border: #15324a;
  --fg: #7fd7ff;
  --dim: #3f7fa6;
  --hl: #e0f6ff;
  --accent: #ffa8e2;
  --ok: #6dffc7;
  --warn: #ffd479;
  --err: #ff7b8f;
  --num: #4c9ccc;
  --you: #f2fbff;
  --opp: #b7a6ff;
  --card: rgba(127, 215, 255, 0.05);
  --chip: rgba(127, 215, 255, 0.07);
  --sq-light: #a9c3d6;
  --sq-dark: #5b7f9c;
  --glow: rgba(127, 215, 255, 0.35);
  --select: rgba(127, 215, 255, 0.28);
}

[data-theme='dracula'] {
  --bg: #15161e;
  --bg2: #2a1f3d;
  --win: #22232e;
  --bar: #2b2c3a;
  --border: #44475a;
  --fg: #f8f8f2;
  --dim: #8b93c4;
  --hl: #ffffff;
  --accent: #bd93f9;
  --ok: #50fa7b;
  --warn: #f1fa8c;
  --err: #ff5555;
  --num: #8be9fd;
  --you: #f8f8f2;
  --opp: #ff79c6;
  --card: rgba(189, 147, 249, 0.06);
  --chip: rgba(189, 147, 249, 0.08);
  --sq-light: #c2b2e0;
  --sq-dark: #7461a8;
  --glow: rgba(189, 147, 249, 0.25);
  --select: rgba(189, 147, 249, 0.3);
}

[data-theme='solarized'] {
  --bg: #001e26;
  --bg2: #003340;
  --win: #002b36;
  --bar: #073642;
  --border: #0d4a58;
  --fg: #93a1a1;
  --dim: #5f7d84;
  --hl: #eee8d5;
  --accent: #b58900;
  --ok: #859900;
  --warn: #cb4b16;
  --err: #dc322f;
  --num: #268bd2;
  --you: #fdf6e3;
  --opp: #2aa198;
  --card: rgba(147, 161, 161, 0.05);
  --chip: rgba(147, 161, 161, 0.07);
  --sq-light: #d9d2b6;
  --sq-dark: #7f9c97;
  --glow: rgba(147, 161, 161, 0.15);
  --select: rgba(181, 137, 0, 0.3);
}

[data-theme='paper'] {
  --bg: #e4e0d4;
  --bg2: #f3efe4;
  --win: #fbfaf5;
  --bar: #f0ede3;
  --border: #d3cdbd;
  --fg: #2d2b26;
  --dim: #7b766a;
  --hl: #000000;
  --accent: #b4561a;
  --ok: #1f7a3a;
  --warn: #8f6200;
  --err: #b3261e;
  --num: #6d6a60;
  --you: #000000;
  --opp: #1c4fd8;
  --card: rgba(0, 0, 0, 0.025);
  --chip: rgba(0, 0, 0, 0.04);
  --sq-light: #f0d9b5;
  --sq-dark: #b58863;
  --glow: transparent;
  --select: rgba(180, 86, 26, 0.2);
}

[data-theme='mono'] {
  --bg: #000;
  --bg2: #000;
  --win: #000;
  --bar: #111;
  --border: #555;
  --fg: #f2f2f2;
  --dim: #b5b5b5;
  --hl: #fff;
  --accent: #fff;
  --ok: #fff;
  --warn: #fff;
  --err: #fff;
  --num: #ccc;
  --you: #fff;
  --opp: #fff;
  --card: transparent;
  --chip: transparent;
  --sq-light: #d8d8d8;
  --sq-dark: #7a7a7a;
  --glow: transparent;
  --select: #444;
}

:root {
  --font-size: 15px;
  --font: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'SFMono-Regular', ui-monospace, Menlo, Consolas, 'Liberation Mono', monospace;
  --sq: min(44px, calc((100vw - 64px) / 8.8));
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(1200px 700px at 50% -10%, var(--bg2), transparent 70%),
    var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: var(--font-size);
  line-height: 1.5;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

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

#app {
  height: 100vh;
  height: 100dvh;
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px;
}

.window {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--win);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
  overflow: hidden;
}

/* CRT: scanlines + soft glow (decorative, can be turned off with "crt off"). */
.crt .window::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 0, rgba(255, 255, 255, 0.025) 1px, transparent 1px, transparent 3px);
  mix-blend-mode: overlay;
  border-radius: inherit;
}
.crt .window::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0, 0, 0, 0.35) 100%);
  border-radius: inherit;
  z-index: 1;
}
.crt #output, .crt .prompt { text-shadow: 0 0 6px var(--glow); }
[data-theme='paper'].crt .window::before,
[data-theme='mono'].crt .window::before { display: none; }
[data-theme='paper'].crt .window::after { opacity: 0.4; }

.titlebar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 36px;
  padding: 0 14px;
  background: var(--bar);
  border-bottom: 1px solid var(--border);
  color: var(--dim);
  font-size: 0.85em;
  user-select: none;
}
.dots { display: flex; gap: 7px; }
.dots i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--dot1, #ff5f56);
  opacity: 0.85;
}
.dots i:nth-child(2) { background: var(--dot2, #ffbd2e); }
.dots i:nth-child(3) { background: var(--dot3, #27c93f); }
.title { flex: 1; text-align: center; color: var(--hl); letter-spacing: 0.02em; }
.title-dim { color: var(--dim); }
.titlebar-right { width: 40px; text-align: right; color: var(--accent); }

#output {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 14px 20px 10px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  overscroll-behavior: contain;
  position: relative;
  z-index: 2;
}
#output::-webkit-scrollbar { width: 8px; }
#output::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }

.line {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  min-height: 1.5em;
  /* Hanging indent: wrapped continuation lines are indented, so one long
     message never looks like two unrelated lines on narrow screens. */
  padding-left: 2ch;
  text-indent: -2ch;
  animation: line-in 0.14s ease-out;
}
.line * { text-indent: 0; }

/* "key  description" lists (help, menus, achievements...): a real grid, so
   descriptions wrap inside their own column. */
.items {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  column-gap: 2.5ch;
  padding-left: 2ch;
  margin: 2px 0 6px;
  animation: line-in 0.14s ease-out;
}
.item-key { white-space: nowrap; }
.item-desc { color: var(--dim); overflow-wrap: anywhere; }
.pieces-list .item-desc { color: var(--hl); }
.help-list { grid-template-columns: 13ch minmax(0, 1fr); } /* same column in every group */

@keyframes line-in {
  from { opacity: 0; transform: translateY(2px); }
  to { opacity: 1; transform: none; }
}

.echo { color: var(--hl); margin-top: 0.35em; }
.echo-prompt { color: var(--accent); }

.dim { color: var(--dim); }
.hl { color: var(--hl); }
.accent { color: var(--accent); }
.ok { color: var(--ok); }
.warn { color: var(--warn); }
.err { color: var(--err); }
.num { color: var(--num); }
.you { color: var(--you); font-weight: 600; }
.opp { color: var(--opp); font-weight: 700; }
.mono-line { color: var(--hl); user-select: all; }
.moves-line { color: var(--hl); padding-left: 1ch; text-indent: 0; border-left: 2px solid var(--border); margin: 2px 0; }
.help-group { color: var(--accent); margin-top: 0.6em; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.85em; }
.ok-line, .err-line { }

.cmd-link {
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline dotted;
  text-underline-offset: 3px;
  text-shadow: inherit;
}
.cmd-link:hover, .cmd-link:focus-visible { color: var(--hl); text-decoration-style: solid; outline: none; }
.cmd { color: var(--accent); }

a { color: var(--accent); }

.banner {
  margin: 2px 0 10px;
  color: var(--fg);
  font-family: var(--font);
  font-size: min(13px, calc((100vw - 48px) / 52));
  line-height: 1;
  letter-spacing: 0;
  white-space: pre;
  overflow: hidden;
  text-shadow: none;
  animation: line-in 0.4s ease-out;
}
.banner .b-solid { color: var(--fg); text-shadow: 0 0 8px var(--glow); }
.banner .b-shade { color: var(--dim); opacity: 0.55; }

.spinner .spin-glyph { color: var(--accent); display: inline-block; width: 1ch; }

.pulse { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.45; } }

/* --- cards & tables --------------------------------------------------------- */

.card {
  margin: 8px 0 10px;
  padding: 10px 14px;
  max-width: 720px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  background: var(--card);
  animation: line-in 0.2s ease-out;
}
.card-title { color: var(--hl); font-weight: 700; margin-bottom: 4px; }
.card-row { display: grid; grid-template-columns: minmax(110px, max-content) 1fr; gap: 0 16px; }
.card-key { color: var(--dim); }
.card-val { color: var(--fg); overflow-wrap: anywhere; }
.card-line { color: var(--fg); white-space: pre-wrap; }
.card-footer { margin-top: 6px; color: var(--dim); }
.card.result.win { border-left-color: var(--ok); }
.card.result.loss { border-left-color: var(--err); }
.card.result.draw { border-left-color: var(--warn); }
.card.achievement { border-left-color: var(--ok); }
.card.puzzle { border-left-color: var(--opp); }
.guide-step { margin: 6px 0; }
.guide-step .dim { padding-left: 3ch; }
.spark { letter-spacing: -0.5px; color: var(--accent); }

.tbl-wrap { overflow-x: auto; margin: 6px 0 10px; }
.tbl { border-collapse: collapse; }
.tbl th {
  text-align: left;
  color: var(--dim);
  font-weight: 400;
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 18px 4px 0;
  border-bottom: 1px solid var(--border);
}
.tbl td { padding: 3px 18px 3px 0; vertical-align: top; }

pre.pgn {
  margin: 6px 0;
  padding: 10px 12px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  color: var(--hl);
  white-space: pre-wrap;
  font-family: inherit;
  max-width: 760px;
}

/* --- board -------------------------------------------------------------------- */

.board-block {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  margin: 8px 0 10px;
  animation: line-in 0.2s ease-out;
}

.board {
  display: grid;
  grid-template-columns: 1.4em repeat(8, var(--sq));
  grid-auto-rows: var(--sq);
  text-shadow: none;
  font-family: 'Segoe UI Symbol', 'Noto Sans Symbols 2', 'Noto Sans Symbols', 'DejaVu Sans', 'Arial Unicode MS', sans-serif;
  border-radius: 4px;
}
.board .coord { display: grid; place-items: center; color: var(--dim); font-family: var(--font); font-size: 0.75em; }
.board .coord.file { height: 1.6em; align-self: start; }
.board .sq {
  display: grid;
  place-items: center;
  font-size: calc(var(--sq) * 0.8);
  line-height: 1;
  user-select: none;
}
.board .sq.light { background: var(--sq-light); }
.board .sq.dark { background: var(--sq-dark); }
.board .sq.last { box-shadow: inset 0 0 0 999px rgba(255, 221, 0, 0.32); }
.board .sq.check { background-image: radial-gradient(circle, rgba(255, 40, 40, 0.95) 0%, rgba(255, 40, 40, 0.5) 40%, transparent 72%); }
.board .pc.w {
  color: #fdfdfd;
  text-shadow: 0 0 1px #000, 0 0 1px #000, 0 0 1px #000, 0 1px 2px rgba(0, 0, 0, 0.5);
}
.board .pc.b {
  color: #141414;
  text-shadow: 0 0 1px rgba(255, 255, 255, 0.55), 0 1px 1px rgba(0, 0, 0, 0.4);
}
.board.shadow .sq { font-size: calc(var(--sq) * 0.5); }
.board-hidden .board .pc { visibility: hidden; }
.board-hidden .board { filter: saturate(0.6); }
.board-hidden .board::after { content: ''; }
.board-revealed .board { outline: 2px solid var(--accent); outline-offset: 3px; }
.ascii-board { margin: 0; font-family: var(--font); color: var(--hl); line-height: 1.25; }

.board-side { display: flex; flex-direction: column; gap: 2px; min-width: 180px; color: var(--fg); }

/* --- status line, quick actions and prompt ------------------------------------------- */

.statusbar {
  flex: none;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 14px;
  background: var(--bar);
  border-top: 1px solid var(--border);
  font-size: 0.8em;
  color: var(--fg);
  white-space: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  position: relative;
  z-index: 2;
}
.statusbar::-webkit-scrollbar { display: none; }
.status-left, .status-right { display: flex; align-items: center; gap: 0; }
.statusbar .seg { padding: 0 10px; border-right: 1px solid var(--border); }
.statusbar .seg:last-child { border-right: 0; }
.status-left .seg:first-child { padding-left: 0; }
.status-right .seg:last-child { padding-right: 0; }

.actions {
  flex: none;
  display: flex;
  gap: 6px;
  padding: 7px 14px 0;
  overflow-x: auto;
  scrollbar-width: none;
  position: relative;
  z-index: 2;
}
.actions::-webkit-scrollbar { display: none; }
.actions:empty { display: none; }
.chip {
  flex: none;
  font: inherit;
  font-size: 0.82em;
  color: var(--dim);
  background: var(--chip);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 12px;
  cursor: pointer;
  transition: color 0.12s, border-color 0.12s, background 0.12s;
}
.chip:hover, .chip:focus-visible { color: var(--hl); border-color: var(--accent); outline: none; }
.chip.primary { color: var(--win); background: var(--accent); border-color: var(--accent); font-weight: 600; }
.chip.answer { color: var(--hl); border-color: var(--dim); }

.prompt {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px 12px 20px;
  position: relative;
  z-index: 2;
}
#prompt-label { color: var(--accent); white-space: nowrap; font-weight: 600; }
#input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--hl);
  font: inherit;
  caret-color: var(--accent);
  caret-shape: block;
  padding: 2px 0;
}
.icon-btn {
  flex: none;
  font: inherit;
  background: var(--chip);
  border: 1px solid var(--border);
  color: var(--dim);
  border-radius: 8px;
  width: 2.2em;
  height: 2em;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
}
.icon-btn:hover { color: var(--hl); border-color: var(--accent); }
.icon-btn.on { border-color: var(--ok); color: var(--ok); box-shadow: 0 0 10px var(--glow); }
.icon-btn.send { display: none; }

.noscript { color: #f66; padding: 20px; font-family: monospace; }

/* --- small screens ---------------------------------------------------------------------- */

@media (max-width: 700px) {
  :root { --font-size: 14px; } /* "font <n>" overrides this */
  /* viewport-fit=cover: keep clear of the notch, status bar and home indicator. */
  #app {
    padding: env(safe-area-inset-top, 0) env(safe-area-inset-right, 0) 0 env(safe-area-inset-left, 0);
  }
  .window { border-radius: 0; border: 0; }
  .titlebar { height: 30px; }
  .dots { display: none; }
  #output { padding: 10px 12px 6px; }
  .prompt { padding: 8px 10px max(10px, env(safe-area-inset-bottom, 0)) 12px; }
  .card { padding: 8px 10px; }
  .card-row { grid-template-columns: minmax(84px, max-content) minmax(0, 1fr); gap: 0 10px; }
  .board-side { min-width: 0; }
  .tbl td, .tbl th { padding-right: 12px; }

  /* Status line: all segments flow together and wrap instead of running off
     the screen; the engine/voice indicators stay right-aligned. */
  .statusbar { display: flex; flex-wrap: wrap; row-gap: 2px; column-gap: 0; padding: 4px 10px; overflow: visible; }
  .status-left, .status-right { display: contents; }
  .statusbar .seg { padding: 0 8px; }
  .status-left .seg:last-child { border-right: 0; }
  .status-right .seg:first-child { margin-left: auto; border-left: 1px solid var(--border); }
  .status-left .seg:first-child { padding-left: 0; }

  /* Quick actions scroll sideways; fade the edge so it is obvious. */
  .actions {
    padding: 6px 10px 0;
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 32px), transparent);
    mask-image: linear-gradient(to right, #000 calc(100% - 32px), transparent);
  }
  .actions::after { content: ''; flex: 0 0 24px; }
}

/* Phones: each list entry becomes "command" with its description below. */
@media (max-width: 560px) {
  .items, .help-list { grid-template-columns: minmax(0, 1fr); padding-left: 1ch; }
  .item-key { white-space: normal; }
  .item-desc { padding-left: 2ch; margin-bottom: 5px; }
}

@media (pointer: coarse) {
  .icon-btn.send { display: grid; }
  .chip { padding: 5px 14px; }
  /* iOS zooms the whole page when an input's text is under 16px. */
  #input { font-size: max(16px, var(--font-size)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}