:root {
  --bg: #f3efe6;
  --panel: #fffdf8;
  --fg: #22201c;
  --muted: #6d685e;
  --line: #ddd6c8;
  --accent: #1d5b84;
  --accent-fg: #ffffff;
  --device: #2a2b30;
  --device-edge: #17181b;
  --key: #222327;
  --key-fg: #ece9e1;
  --led-off: #3a1810;
  --led-on: #ff5a2a;
  --bad: #a3322a;
  --ok: #2d7a43;
  --stage: #1b2a33;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141412;
    --panel: #1d1c19;
    --fg: #ece9e1;
    --muted: #a19d93;
    --line: #34322d;
    --accent: #6eb2e4;
    --accent-fg: #0d1b26;
    --device: #26272b;
    --device-edge: #0c0c0e;
    --key: #1c1d21;
    --bad: #ec7a70;
    --ok: #76c58d;
  }
}
:root[data-theme="dark"] {
  --bg: #141412; --panel: #1d1c19; --fg: #ece9e1; --muted: #a19d93; --line: #34322d;
  --accent: #6eb2e4; --accent-fg: #0d1b26; --device: #26272b; --device-edge: #0c0c0e; --key: #1c1d21;
  --bad: #ec7a70; --ok: #76c58d;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--stage);
  color: var(--fg);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
}
h1 { font-size: 1.1rem; margin: 0; }
h1 span { color: var(--muted); font-weight: 400; font-size: .85rem; margin-left: .4em; }
h3 { font-size: .9rem; margin: 16px 0 6px; color: var(--muted); }
[hidden] { display: none !important; }

/* the stage: settings, board and drawer */
#stage {
  display: flex; height: 100vh; height: 100dvh;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
#play { flex: 1 1 auto; min-width: 0; display: flex; }
.side {
  /* the scrollbar's space is always reserved, so opening sections doesn't change the width */
  flex: 0 0 auto; overflow: auto; scrollbar-gutter: stable; padding: 8px;
  background: var(--panel); color: var(--fg);
}
/* the panels open on the side of their buttons: settings left of the board, the drawer right of
   it (both above/below it in portrait); only one of them is open at a time */
#settings { order: 0; width: clamp(280px, 32vw, 420px); border-right: 1px solid var(--line); padding: 0 14px 12px; overscroll-behavior: contain; }
#board-area { order: 1; }
#tray { order: 2; width: clamp(112px, 22vw, 220px); border-left: 1px solid var(--line); }
.side-head { display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
#board-area { flex: 1 1 auto; min-width: 0; container-type: size; display: grid; place-items: center; }
#board-box { position: relative; width: min(100cqw, 100cqh); aspect-ratio: 1; }
#board, #board .board { width: 100%; height: 100%; }
/* portrait: the board is limited by the width, so the drawer goes into the free space below it */
@media (orientation: portrait) {
  #play { flex-direction: column; }
  #tray { flex: 1 1 0; min-height: 0; width: auto; border-left: 0; border-top: 1px solid var(--line); display: flex; flex-direction: column; }
  #settings { flex: 1 1 0; min-height: 0; width: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  #tray-board { flex: 1 1 0; min-height: 0; }
  /* fits both ways: the tray is short when the unused antennas are hidden */
  #tray-board .board { height: 100%; width: 100%; max-width: 220px; }
  #play:has(> .side:not([hidden])) #board-area { flex: 0 0 auto; height: min(100vw, 62dvh); }
}

/* the console stands on the whirlpool, at (512, 515) of the 1024 × 1024 board */
#console-layer {
  position: absolute; left: 50%; top: 50.3%; width: var(--console-size, 33%);
  translate: -50% -50%; z-index: 1;
}
#console-layer .device { --size: 100%; }
#console-layer.enlarged { position: fixed; left: 50%; top: 50%; width: min(94vw, 94dvh); z-index: 20; }
#enlarge-backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, .6); z-index: 19; }
#leds { cursor: zoom-in; }
#console-layer.enlarged #leds { cursor: zoom-out; }

.corner-btn {
  position: absolute; bottom: 1.2%; z-index: 2; width: 40px; height: 40px; padding: 0;
  display: grid; place-items: center; cursor: pointer;
  border-radius: 50%; border: 1px solid rgba(255, 255, 255, .35);
  background: rgba(20, 20, 18, .55); color: #fff; opacity: .8;
}
.corner-btn:hover, .corner-btn:focus-visible { opacity: 1; }
.corner-btn.left { left: 1.2%; }
.corner-btn.right { right: 1.2%; }
.corner-btn svg { width: 24px; height: 24px; }
#open-settings svg { fill: currentColor; }
#open-tray svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
#open-tray svg circle { fill: currentColor; stroke: none; }
.icon-btn {
  font: inherit; font-size: 1.4rem; line-height: 1; cursor: pointer; width: 34px; height: 34px;
  border: 0; border-radius: 50%; background: transparent; color: var(--muted);
}
.icon-btn:hover { background: color-mix(in srgb, var(--fg) 8%, transparent); color: var(--fg); }

/* settings panel */
.settings-head h1 span { display: block; margin-left: 0; }
.settings-head {
  position: sticky; top: 0; z-index: 1; background: var(--panel);
  display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 12px 0 8px;
}
#settings > details { border-top: 1px solid var(--line); padding: 2px 0 6px; }
#settings > details > summary { cursor: pointer; font-weight: 600; padding: 8px 0; }
#settings details details summary { cursor: pointer; color: var(--muted); }
.sliders { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 4px 10px; align-items: center; margin: 8px 0; }
.sliders label { display: contents; }
.check { display: flex; gap: 6px; align-items: center; }
.views { display: grid; gap: 6px; margin: 8px 0; }
select { font: inherit; color: var(--fg); background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 2px 6px; }
/* no accidental text selection; the log and announcements can still be copied */
body { user-select: none; -webkit-user-select: none; }
.log, input, select { user-select: text; -webkit-user-select: text; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
code { font-family: ui-monospace, monospace; font-size: .9em; }
.controls ul { margin: 4px 0 8px; padding-left: 1.2em; }
.controls li { margin: 2px 0; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }

.btn {
  font: inherit; cursor: pointer;
  border: 1px solid var(--line); background: var(--panel); color: var(--fg);
  border-radius: 8px; padding: 8px 14px; display: inline-block;
}
/* two buttons of equal width; Pause next to a wide Power button */
.row.split > .btn { flex: 1 1 0; text-align: center; }
#game-row { margin-top: 16px; }
#game-row select { flex: 1 1 auto; min-width: 0; }
.power-row { margin: 16px 0; }
.power-row > #pause { flex: 1 1 0; }
.power-row > #power { flex: 3 1 0; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); font-weight: 600; }
.btn:disabled, .btn.disabled { opacity: .45; cursor: default; pointer-events: none; }
.drop {
  border: 2px dashed var(--line); border-radius: 10px; padding: 14px; text-align: center;
  color: var(--muted); margin: 8px 0;
}
.drop.over { border-color: var(--accent); color: var(--accent); }
.bad { color: var(--bad); } .ok { color: var(--ok); }

/* the console */
.device {
  --size: min(100%, 440px);
  position: relative;
  width: var(--size);
  aspect-ratio: 1;
  margin: 0 auto;
  background: radial-gradient(circle at 35% 30%, color-mix(in srgb, var(--device) 80%, white), var(--device) 60%);
  border: 3px solid var(--device-edge);
  border-radius: 50%;
  box-shadow: 0 10px 24px rgba(0, 0, 0, .25);
  container-type: inline-size;
}
#leds {
  /* size in % of the console (overlay adjustment "LED display"), always centred */
  --leds: 44%;
  position: absolute; left: calc((100% - var(--leds)) / 2); top: calc((100% - var(--leds)) / 2);
  width: var(--leds); height: var(--leds);
  background: #120806; border-radius: 6px;
  image-rendering: pixelated;
}
.key {
  font: inherit; font-size: .8rem; font-weight: 600; cursor: pointer;
  border: 1px solid #45464c; color: var(--key-fg); background: radial-gradient(circle at 40% 35%, #34353a, var(--key) 70%);
  border-radius: 50%;
  touch-action: manipulation; user-select: none; -webkit-user-select: none;
  box-shadow: 0 3px 0 rgba(0, 0, 0, .55);
}
.key.pressed, .key:active { transform: translateY(2px); box-shadow: 0 1px 0 rgba(0, 0, 0, .35); }
.device .key {
  position: absolute; width: 13.5%; aspect-ratio: 1; translate: -50% -50%; font-size: 2.9cqw;
  display: grid; place-items: center; line-height: 1.05; padding: 0;
}
.device .key .label { position: relative; } /* pushed away from the display by console-ui.js */
.device .key small { display: block; font-weight: 400; font-size: 2.2cqw; color: #a9a59b; }
/* three LEDs in a triangle; drawn for key 6 (yellow on top, facing the display), rotated per key */
.device .key .tri { position: absolute; inset: 0; pointer-events: none; }
.device .key .tri i {
  position: absolute; width: 17%; aspect-ratio: 1; border-radius: 50%;
  translate: -50% -50%; background: var(--c-off); border: 1px solid rgba(0, 0, 0, .5);
}
.device .key .tri .y { left: 50%; top: 14%; --c: #ffd21f; --c-off: #4a4224; }
.device .key .tri .g { left: 70%; top: 36%; --c: #39e05a; --c-off: #223f28; }
.device .key .tri .r { left: 30%; top: 36%; --c: #ff3b30; --c-off: #4a2422; }
.device .key .tri i.on { background: var(--c); box-shadow: 0 0 6px 2px var(--c); }
/* picture of the printed overlay sheet; placed and rotated by console-ui.js, clicks go through */
.device { overflow: hidden; }
.device .overlay { position: absolute; max-width: none; z-index: 2; pointer-events: none; user-select: none; }
.key.wide { border-radius: 8px; padding: 8px 14px; min-width: 56px; }

/* status / log */
.stats { display: grid; grid-template-columns: max-content 1fr; gap: 2px 12px; margin: 0; }
.stats dt { color: var(--muted); }
.stats dd { margin: 0; font-variant-numeric: tabular-nums; }
.log {
  font: 12px/1.4 ui-monospace, monospace; max-height: 32vh; overflow: auto;
  margin: 0; padding: 0 0 0 2.6em; overflow-wrap: anywhere;
}
pre.log { white-space: pre-wrap; padding: 8px; background: color-mix(in srgb, var(--fg) 5%, transparent); border-radius: 6px; }
.log li { margin: 0; }
.log .alias { color: var(--muted); }

/* board */
.board { width: 100%; display: block; margin: 0 auto; touch-action: none; overflow: visible; user-select: none; -webkit-user-select: none; }
.board .water { fill: color-mix(in srgb, #2d7fb8 30%, var(--panel)); }
.board .fallback .label { font: 600 30px system-ui, sans-serif; text-anchor: middle; fill: var(--fg); }
.board.has-picture .fallback .label { display: none; }
.board .field circle { fill: rgba(255, 255, 255, .06); stroke: #fff; stroke-opacity: .55; stroke-width: 3; stroke-dasharray: 10 8; }
.board.has-picture .board-field circle { fill: transparent; stroke-opacity: .0; }
.board.placing .field circle, .board .field:hover circle,
.board.has-picture.placing .board-field circle, .board.has-picture .board-field:hover circle { stroke-opacity: .9; fill: rgba(255, 255, 255, .12); }
/* view options (app.js): antenna areas never / on interact (above) / always, ids on antennas and keys */
body.areas-always .board .board-field circle { stroke-opacity: .9; fill: rgba(255, 255, 255, .12); }
body.areas-never .board .board-field circle { display: none; }
body:not(.show-antenna-ids) .board .num { display: none; }
body:not(.show-key-ids) .device .key .label { visibility: hidden; }
body:not(.show-key-ids) .key-id { display: none; }
.board .tray-field circle { fill: color-mix(in srgb, #2d7fb8 40%, var(--panel)); stroke: var(--fg); stroke-opacity: .4; stroke-dasharray: none; }
.board .num { font: 600 22px ui-monospace, monospace; text-anchor: middle; fill: #fff; stroke: rgba(0, 0, 0, .6); stroke-width: 4; paint-order: stroke; }
.board .tray-field .num { fill: var(--fg); stroke: none; }
.board .dock { fill: color-mix(in srgb, var(--fg) 6%, transparent); stroke: var(--line); stroke-width: 2; stroke-dasharray: 10 10; }
.board .docklabel { font: 600 26px system-ui, sans-serif; fill: var(--muted); }
.board .ship { cursor: grab; }
.board .ship .halo { fill: rgba(255, 255, 255, .55); stroke: rgba(0, 0, 0, .35); stroke-width: .6; }
.board .ship .hull, .board .ship .sail { stroke-linejoin: round; }
.board .ship .dot { stroke: rgba(0, 0, 0, .5); stroke-width: .8; }
/* figure style (app.js): plain coloured circles or ships */
body:not(.figures-ships) .board .ship :is(.hull, .sail) { display: none; }
body.figures-ships .board .ship .dot { display: none; }
.board .ship .hull { stroke: rgba(0, 0, 0, .6); stroke-width: .8; }
.board .ship.dragging { cursor: grabbing; opacity: .85; }
.board .ship.selected .halo, .board .ship:focus-visible .halo { stroke: var(--accent); stroke-width: 2; }
.board .ship:focus-visible { outline: none; }
/* antenna editor (board-editor.js): every area and id shown, preview of the antenna being placed */
.board.editing { cursor: crosshair; }
.board.board.editing .board-field circle { display: inline; stroke-opacity: .9; fill: rgba(255, 255, 255, .12); }
body.editing-antennas .board .num { display: inline; } /* also in the drawer */
.board .edit-layer { pointer-events: none; }
body.editing-antennas #console-layer { pointer-events: none; }
@media (pointer: coarse) { .pc-only { display: none; } }
#antenna-dialog {
  background: var(--panel); color: var(--fg); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; width: min(380px, calc(100vw - 32px));
}
#antenna-dialog::backdrop { background: rgba(0, 0, 0, .45); }
#antenna-dialog h2 { font-size: 1.05rem; margin: 0 0 12px; }
.ad-grid { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 12px; align-items: center; }
.ad-grid input { font: inherit; color: var(--fg); background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; min-width: 0; }
.ad-buttons .spacer { flex: 1; }
#ad-error:empty { display: none; }
.board .edit-layer circle { fill: rgba(255, 210, 31, .18); stroke: #ffd21f; stroke-width: 3; stroke-dasharray: 10 8; }
.board .edit-layer text { font: 700 30px ui-monospace, monospace; text-anchor: middle; fill: #fff; stroke: #000; stroke-width: 6; paint-order: stroke; }