:root {
  --bg: #12161b;
  --panel: #1b2128;
  --panel-raised: #252d36;
  --border: #323c47;
  --text: #e7eaee;
  --muted: #9aa5b1;
  --accent: #f2c200;
  --accent-text: #1a1a1a;
  --ball: #888;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 "Segoe UI", system-ui, sans-serif;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px 16px 24px;
  display: grid;
  gap: 10px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

button,
select {
  font: inherit;
  color: var(--text);
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: #56636f; }
button:disabled { opacity: 0.4; cursor: default; }

button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

kbd {
  font: 11px/1 ui-monospace, Consolas, monospace;
  padding: 1px 4px;
  margin-left: 4px;
  border: 1px solid currentColor;
  border-radius: 3px;
  opacity: 0.6;
}

.history-tools,
.toolbar,
.view-options,
.tray {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.toolbar { gap: 10px; }

.group-label {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 2px;
}

.mode-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 7px;
  overflow: hidden;
}

.mode-switch button {
  border: 0;
  border-radius: 0;
  padding: 6px 14px;
}

.mode-switch button + button { border-left: 1px solid var(--border); }

.strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  padding: 4px 10px;
  min-height: 40px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.strip[hidden] { display: none; }

.current-ball {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 92px;
  font-weight: 600;
}

.current-ball svg { width: 24px; height: 24px; }
.muted { color: var(--muted); font-weight: 400; }

.item {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.item-label { color: var(--muted); margin-right: 4px; }
.item .swatch + .item-label { color: var(--text); }
.item.unset { opacity: 0.4; }

.hotkeys {
  margin: 0 0 -4px;
  color: var(--muted);
  font-size: 12px;
}

.hotkeys kbd { margin: 0 3px 0 0; opacity: 1; color: var(--text); }

.line-widths button { padding: 4px 10px; }
.item-value { min-width: 70px; }

button.clear {
  padding: 2px 7px;
  line-height: 1.2;
  background: transparent;
  border-color: transparent;
  color: var(--muted);
  font-size: 16px;
}

button.clear:hover:not(:disabled) { color: var(--text); border-color: var(--border); }

.swatch {
  display: inline-block;
  width: 11px;
  height: 11px;
  margin-right: 6px;
  vertical-align: -1px;
  border: 2px solid var(--ball);
}

.swatch.hand { border-radius: 50%; background: rgba(246, 243, 234, 0.6); }
.swatch.good { border-radius: 2px; background: color-mix(in srgb, var(--ball) 45%, transparent); }
.swatch.path { width: 14px; height: 0; border-width: 2px 0 0; border-radius: 0; vertical-align: 3px; }
.swatch.ok { border-radius: 2px; border-style: dashed; background: color-mix(in srgb, var(--ball) 20%, transparent); }

.line-swatches { display: inline-flex; gap: 4px; }

.line-swatch {
  width: 22px;
  height: 22px;
  padding: 0;
  border-radius: 50%;
  border: 2px solid var(--border);
}

.line-swatch.active { border-color: var(--text); box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--text); }

input[type="color"] {
  width: 28px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: none;
  cursor: pointer;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  user-select: none;
}

.check input { margin: 0; }

.view-options { gap: 6px 16px; }

.legend {
  display: inline-block;
  width: 18px;
  height: 11px;
  border-radius: 2px;
  border: 2px solid #f2c200;
  background: rgba(242, 194, 0, 0.6);
}

.legend-hand { width: 12px; height: 12px; border-radius: 50%; background: rgba(246, 243, 234, 0.6); }
.legend-path { height: 0; border-width: 2px 0 0; border-radius: 0; background: none; }
.legend-good { background: rgba(242, 194, 0, 0.4); }
.legend-ok { background: rgba(242, 194, 0, 0.18); border-style: dashed; }

/* the phone layout groups these; elsewhere they lay out as if they weren't there */
.top,
.bottom { display: contents; }

.more-button { display: none; }

.table-wrap {
  position: relative;
  background: #0c0f12;
  border-radius: 10px;
  padding: 8px;
}

.zoom-fit {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  background: rgba(37, 45, 54, 0.92);
}

.board {
  display: block;
  width: 100%;
  height: auto;
  max-height: calc(100svh - 24px);
  touch-action: none;
  user-select: none;
}

.board.drawing { cursor: crosshair; }

.status {
  margin: 0;
  min-height: 1.4em;
  color: var(--muted);
}

.tray {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}

.tray-balls { display: flex; flex-wrap: wrap; gap: 6px; }

.tray-ball {
  width: 40px;
  height: 40px;
  padding: 2px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid transparent;
  cursor: grab;
  touch-action: none;
}

.tray-ball svg { display: block; width: 100%; height: 100%; pointer-events: none; }
.tray-ball.placed { opacity: 0.25; cursor: pointer; }
.tray-ball.selected { border-color: var(--text); }

.drag-ghost {
  position: fixed;
  left: 0;
  top: 0;
  pointer-events: none;
  z-index: 10;
  filter: drop-shadow(0 3px 4px rgba(0, 0, 0, 0.5));
}

.drag-ghost svg { display: block; width: 100%; height: 100%; }

/* SVG items */
.ball-number {
  font-family: "Arial Black", "Segoe UI Black", "Segoe UI", system-ui, sans-serif;
  font-weight: 900;
  text-anchor: middle;
  fill: #111;
  stroke: #111;
  stroke-width: 0.04;
  paint-order: stroke;
}

[data-hit="ball"] { cursor: grab; }
.board.balls-locked [data-hit="ball"] { cursor: pointer; }
.ball-off-table { opacity: 0.45; }
.selected-ring { fill: none; stroke: #fff; stroke-width: 0.22; stroke-dasharray: 0.5 0.35; pointer-events: none; }

.region { cursor: pointer; stroke-linejoin: round; }
.region.selected { stroke: #fff; }

.line-hit { stroke: transparent; fill: none; cursor: move; pointer-events: stroke; }
.line-visual,
.path-visual { pointer-events: none; stroke-linecap: round; }

.pocket-hit { fill: transparent; stroke: none; cursor: pointer; }
.pocket-hit.armed { stroke: rgba(255, 255, 255, 0.55); stroke-width: 0.25; stroke-dasharray: 0.6 0.4; }
.pocket-hit.chosen { stroke: #fff; stroke-width: 0.35; stroke-dasharray: none; }

.pocket-line { pointer-events: none; stroke-linecap: round; }

.handle {
  fill: #fff;
  stroke: #111;
  stroke-width: 0.15;
  cursor: grab;
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 80ms;
}

.handle:hover { transform: scale(1.6); fill: #ffe36b; }
.handle-hit { fill: transparent; cursor: grab; }
.handle.chosen { fill: var(--accent); transform: scale(1.4); }
.handle.closing { fill: var(--accent); }

.edge-hit { stroke: transparent; fill: none; pointer-events: stroke; cursor: copy; }
.edge-hit:hover { stroke: rgba(255, 255, 255, 0.25); }

.hand-marker { cursor: grab; }
.selected-ring.current { stroke: var(--accent); stroke-dasharray: none; stroke-width: 0.25; }

#layer-pocket-lines,
#layer-draft { pointer-events: none; }
.board.drawing #layer-regions,
.board.drawing #layer-lines,
.board.drawing #layer-pockets,
.board.drawing #layer-balls,
.board.drawing #layer-handles { pointer-events: none; }

/* Each mode only takes clicks on its own things. */
.board.mode-ball #layer-lines { pointer-events: none; }
.board.mode-line #layer-regions,
.board.mode-line #layer-pockets,
.board.mode-line #layer-balls { pointer-events: none; }
.board.mode-line { cursor: crosshair; }

/* Touch-screen buttons for what the keys do; a mouse uses the keys instead. */
.actions {
  display: none;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.actions-gap { width: 6px; }

button { touch-action: manipulation; }

/* Help */
.help {
  width: min(720px, calc(100vw - 24px));
  max-height: calc(100vh - 24px);
  padding: 0;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.help[open] { display: flex; flex-direction: column; }
.help::backdrop { background: rgba(0, 0, 0, 0.55); }

.help-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 12px 8px 20px;
  border-bottom: 1px solid var(--border);
}

.help-head h2 { margin: 0; font-size: 18px; font-weight: 600; }
.help-head .clear { font-size: 22px; }

.help-body {
  overflow-y: auto;
  padding: 4px 20px 18px;
}

.help-body h3 { margin: 18px 0 6px; font-size: 15px; color: var(--accent); }
.help-body p,
.help-body ul { margin: 6px 0; }
.help-body ul { padding-left: 20px; }
.help-body li { margin: 3px 0; }
.help-body kbd { margin: 0 1px; opacity: 1; display: inline; }

.keys { border-collapse: collapse; width: 100%; }
.keys td { padding: 4px 8px 4px 0; vertical-align: top; }
.keys td:nth-child(odd) { white-space: nowrap; }

@media (max-width: 760px) {
  .actions { display: flex; }
  .hotkeys { display: none; }
  .actions button { padding: 6px 10px; }
  /* the action buttons and the tray stay on screen around the table */
  .actions {
    position: sticky;
    top: 0;
    z-index: 5;
    margin: 0 -16px;
    padding: 6px 16px;
    background: var(--bg);
  }
  .tray {
    position: sticky;
    bottom: 0;
    z-index: 5;
    padding: 4px 10px;
    box-shadow: 0 0 0 6px var(--bg);
  }
  .tray-ball { width: 32px; height: 32px; }
  .tray .group-label { display: none; }
  /* short enough to fit between them */
  .board { max-height: calc(100svh - 110px); }
}

@media (max-width: 760px) {
  .app { padding: 8px 16px 16px; }
  .app-header { flex-wrap: wrap; }
  kbd { display: none; }
  .current-ball { min-width: 0; }
  .item-value { min-width: 0; }
  .table-wrap { padding: 4px; }
  h1 { font-size: 17px; }
  .history-tools button { padding: 4px 9px; }
  .actions button { padding: 6px 9px; font-size: 13px; }
  /* stood on end, the tray takes two rows */
  .board.portrait { max-height: calc(100svh - 190px); }
}

/* ---------- phone and tablet: fill the screen, no page scrolling ---------- */

.sheet-body {
  display: grid;
  gap: 8px;
  padding: 12px 16px 18px;
}

.sheet-body > button { padding: 10px 12px; text-align: left; }
.sheet-body .view-options { padding-top: 6px; }

body.phone { overflow: hidden; }
body.phone kbd { display: none; }
body.phone .help-body kbd { display: inline; }

body.phone .app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  max-width: none;
  padding: 6px 10px 8px;
  gap: 6px;
}

body.phone .top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

/* one row of mode, lock, undo, redo and More; then the ball's strip and the actions */
body.phone .toolbar { display: contents; }
body.phone .hotkeys,
body.phone .app-header h1,
body.phone .lock-text { display: none; }
body.phone .mode-switch[aria-label="Mode"] { order: 1; }
body.phone .lock-balls { order: 2; }
body.phone .app-header { order: 3; margin-left: auto; }
body.phone .more-button { display: inline-block; font-size: 16px; line-height: 1.1; }
body.phone .history-tools { flex-wrap: nowrap; }
body.phone .history-tools button,
body.phone .mode-switch button,
body.phone .lock-balls { padding: 6px 10px; }

body.phone .strip {
  order: 4;
  flex: 1 1 100%;
  flex-wrap: nowrap;
  min-height: 0;
  padding: 3px 8px;
  overflow-x: auto;
  white-space: nowrap;
}

body.phone .strip > * { flex: none; }
body.phone .current-ball { min-width: 0; }
body.phone .item-value { min-width: 0; }

body.phone .actions {
  order: 5;
  display: flex;
  flex: 1 1 100%;
  flex-wrap: nowrap;
  position: static;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  background: none;
}

body.phone .actions button { flex: none; padding: 6px 10px; font-size: 13px; }

/* the table takes whatever height is left */
body.phone .table-wrap {
  flex: 1 1 auto;
  min-height: 0;
  padding: 3px;
}

body.phone .board,
body.phone .board.portrait {
  width: 100%;
  height: 100%;
  max-height: none;
}

body.phone .bottom {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

body.phone .status {
  flex: none;
  font-size: 12px;
  line-height: 1.3;
  /* always two lines tall, so a longer hint doesn't shift the table */
  height: 2.6em;
  min-height: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

body.phone .tray {
  position: static;
  padding: 4px 6px;
  box-shadow: none;
}

body.phone .tray .group-label { display: none; }
body.phone .tray-balls { flex-wrap: nowrap; overflow-x: auto; }
body.phone .strip,
body.phone .actions,
body.phone .tray-balls { scrollbar-width: none; }
/* sideways swipes scroll the tray; any other drag pulls the ball out */
body.phone .tray-ball { flex: none; width: 36px; height: 36px; touch-action: pan-x; }

/* Sideways, the table fills the left and the controls stack on the right. */
@media (orientation: landscape) {
  body.phone .app {
    display: grid;
    grid-template-columns: minmax(0, 1fr) clamp(200px, 27vw, 300px);
    grid-template-rows: auto minmax(0, 1fr);
    gap: 6px 10px;
  }

  body.phone .table-wrap { grid-column: 1; grid-row: 1 / 3; }
  body.phone .top { grid-column: 2; grid-row: 1; }
  body.phone .bottom { grid-column: 2; grid-row: 2; min-height: 0; overflow-y: auto; }
  body.phone .actions { flex-wrap: wrap; overflow: visible; }
  body.phone .tray-balls { flex-wrap: wrap; overflow: visible; }
  body.phone .tray-ball { width: 32px; height: 32px; touch-action: none; }
}