:root {
  color-scheme: light;
  --ink: #15365f;
  --paper: #fffefa;
  --grid: #7bd9f3;
  --yellow: #ffd84d;
  --guide: #1e3046;
  --match: #25a95f;
  --miss: #e84855;
  --axis: #e84855;
  --button-shadow: 4px 4px 0 rgba(21, 54, 95, 0.94);
  --panel-shadow: 5px 5px 0 rgba(21, 54, 95, 0.9), 0 16px 36px rgba(21, 54, 95, 0.2);
}

#racePanel { position: fixed; right: 0; top: 0; bottom: 0; width: 300px; padding: 20px; background: #fff; border-left: 2px solid #7bd9f3; z-index: 40; overflow: auto; }
#racePanel { display: flex; flex-direction: column; gap: 10px; padding: 14px; }
#racePanel > :not(#raceRanking) { flex-shrink: 0; }
#racePanel h2 { font-size: 18px; margin: 0; }
#racePanel label { display: block; margin: 0; min-width: 0; font-size: 13px; }
.race-fields { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px; }
.race-fields input, .race-fields select { margin-top: 4px; min-width: 0; }
.race-start-row, .ranking-heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
#racePanel .ranking-heading button { padding: 4px 8px; font-size: 12px; }
#raceRefresh { display: inline-flex; align-items: center; justify-content: center; gap: 5px; min-height: 28px; }
#raceRefresh::before { content: ""; width: 12px; height: 12px; flex: 0 0 12px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; opacity: 0; }
#raceRefresh.is-refreshing::before { opacity: 1; animation: ranking-refresh-spin .7s linear infinite; }
#raceRefresh.is-refreshing { cursor: progress; }
@keyframes ranking-refresh-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { #raceRefresh.is-refreshing::before { animation: none; } }
#racePanel input, #racePanel select { display: block; width: 100%; padding: 8px; font: inherit; border: 1px solid #aaa; border-radius: 4px; }
#racePanel button { padding: 8px 12px; background: #effbf6; border: 1px solid #25a95f; border-radius: 4px; cursor: pointer; }
.race-numbers { display: flex; flex: 1; gap: 12px; margin: 0; font-size: 22px; font-variant-numeric: tabular-nums; white-space: nowrap; }
#raceRanking { flex: 1 1 0; min-height: 100px; overflow-y: auto; margin: 0; padding: 0 4px 0 25px; scrollbar-gutter: stable; }
.ranking-filters { display: flex; flex-wrap: wrap; gap: 4px; margin: 0; }
#racePanel .ranking-filters button { padding: 6px; font-size: 13px; background: #fff; border-color: #adb8bd; }
#racePanel .ranking-filters button[aria-pressed="true"] { background: #15365f; color: #fff; border-color: #15365f; }
.ranking-mode { display: block; width: fit-content; margin-top: 5px; padding: 2px 6px; border-radius: 4px; font-size: 12px; }
.ranking-point { color: #16613d; background: #e2f6eb; }
.ranking-mine { background: #f0f8ff; }
.ranking-me { display: inline-block; margin-right: 5px; padding: 1px 5px; border-radius: 4px; background: #1765a5; color: #fff; font-size: 12px; }
.ranking-segment { color: #9a2453; background: #fce5ee; }
#raceRanking li { padding: 10px 0; border-bottom: 1px solid #ddd; overflow-wrap: anywhere; }
#raceMessage { font-size: 12px; margin: 0; line-height: 1.4; overflow-wrap: anywhere; }
#raceMessage:empty { display: none; }
body.race-open #gridCanvas { width: calc(100vw - 300px); }
body.race-open .floating-tools { left: calc((100vw - 300px) / 2); max-width: calc(100vw - 324px); }
body.race-locked #randomButton, body.race-locked #pointModeButton, body.race-locked #drawModeButton { pointer-events: none; opacity: .45; }
@media(max-width: 700px) {
  #racePanel { width: 150px; padding: 8px; }
  #racePanel h2 { font-size: 16px; }
  .race-fields { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .race-start-row { flex-wrap: wrap; }
  #racePanel .ranking-heading { gap: 3px; }
  #racePanel .ranking-heading button { padding: 4px; font-size: 11px; }
  .race-numbers { font-size: 20px; flex-wrap: wrap; gap: 8px; }
  body.race-open #gridCanvas { width: calc(100vw - 150px); }
  body.race-open .floating-tools { left: calc((100vw - 150px) / 2); max-width: calc(100vw - 160px); bottom: 8px; gap: 4px; }
  body.race-open .tool-button { padding: 5px; font-size: 12px; flex-basis: 100%; }
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-width: 320px;
  min-height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background: #fff;
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  color: inherit;
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  position: relative;
  width: 100vw;
  min-height: 100dvh;
  overflow: hidden;
}

#gridCanvas {
  position: fixed;
  inset: 0;
  display: block;
  width: 100vw;
  height: 100dvh;
  cursor: crosshair;
  touch-action: none;
  user-select: none;
}

#gridCanvas:focus-visible,
button:focus-visible {
  outline: 3px solid #217fd3;
  outline-offset: 3px;
}

.celebration-layer {
  position: fixed;
  inset: 0;
  z-index: 30;
  overflow: hidden;
  pointer-events: none;
}

.celebration-emoji {
  position: absolute;
  left: var(--x);
  top: var(--y);
  display: block;
  font-size: var(--size);
  line-height: 1;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.3);
  animation: emoji-burst 1200ms cubic-bezier(0.17, 0.9, 0.25, 1) forwards;
  animation-delay: var(--delay);
  will-change: transform, opacity;
}

@keyframes emoji-burst {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.25) rotate(0deg);
  }
  12% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(1.12) rotate(var(--rotation));
  }
}

.floating-tools {
  position: fixed;
  left: 50%;
  bottom: clamp(14px, 2.4vw, 26px);
  z-index: 20;
  display: flex;
  max-width: calc(100vw - 28px);
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0;
  flex-wrap: wrap;
  transform: translateX(-50%);
}

.tool-button,
.icon-button {
  min-height: 48px;
  border: 2px solid var(--ink);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--button-shadow);
  cursor: pointer;
  font-weight: 1000;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease, opacity 150ms ease;
}

.tool-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 112px;
  padding: 0 18px;
  font-size: 16px;
  white-space: nowrap;
}

.icon-button {
  display: grid;
  width: 50px;
  height: 48px;
  place-items: center;
  padding: 0;
}

.random-button {
  background: var(--yellow);
}

.point-mode-button[aria-pressed="true"] {
  background: #dff7ed;
  box-shadow: 2px 2px 0 rgba(21, 54, 95, 0.94);
  transform: translate(2px, 2px);
}

#raceToggle[aria-pressed="true"] {
  background: #147d58;
  color: #fff;
  border-color: #095337;
  box-shadow: 2px 2px 0 #095337;
}

.draw-mode-button[aria-pressed="true"] {
  background: #e8f6ff;
  box-shadow: 2px 2px 0 rgba(21, 54, 95, 0.94);
  transform: translate(2px, 2px);
}

body.race-open #pointModeButton,
body.race-open #drawModeButton {
  background: #e5e7eb;
  color: #777;
  border-color: #a4a4a4;
  box-shadow: none;
  transform: none;
  opacity: 1;
  cursor: not-allowed;
}

.tool-button:hover:not(:disabled),
.icon-button:hover:not(:disabled) {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 rgba(21, 54, 95, 0.94);
}

.icon-button svg {
  display: block;
  width: 25px;
  height: 25px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.25;
}

.help-button span {
  display: block;
  font-size: 25px;
  font-weight: 1000;
  line-height: 1;
}

.icon-button:disabled,
.tool-button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
  transform: none;
}

.bubble {
  position: fixed;
  left: var(--bubble-left, 50vw);
  top: var(--bubble-top, 50vh);
  z-index: 35;
  width: max-content;
  max-width: calc(100vw - 24px);
  padding: 12px;
  border: 2px solid var(--ink);
  border-radius: 17px;
  background: var(--paper);
  box-shadow: var(--panel-shadow);
}

.bubble::after {
  position: absolute;
  left: var(--tail-x, 50%);
  top: var(--tail-y, 100%);
  width: 16px;
  height: 16px;
  border: 2px solid var(--ink);
  border-top: 0;
  border-left: 0;
  background: var(--paper);
  content: "";
  transform: translate(-50%, -8px) rotate(45deg);
}

.bubble[data-placement="below"]::after {
  top: 0;
  border: 2px solid var(--ink);
  border-right: 0;
  border-bottom: 0;
  transform: translate(-50%, -8px) rotate(45deg);
}

.help-bubble {
  width: min(340px, calc(100vw - 24px));
}

.help-title {
  padding: 2px 4px 10px;
  font-size: 18px;
  font-weight: 1000;
}

.help-content {
  display: grid;
  gap: 10px;
  max-height: min(58vh, 390px);
  overflow: auto;
  padding: 2px 4px 4px;
}

.help-content section,
.help-content h2,
.help-content p {
  margin: 0;
}

.help-content h2 {
  margin-bottom: 3px;
  color: #e84855;
  font-size: 14px;
}

.help-content p {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.55;
}

@media (max-width: 520px) {
  .floating-tools {
    width: calc(100vw - 28px);
  }

  .tool-button {
    flex: 1 1 130px;
  }
}