@font-face {
  font-family: Tower;
  src: url('font/NotoSansCJKjp-Bold.otf') format('opentype');
  font-weight: 700;
  font-display: swap;
}
:root {
  color-scheme: light;
  --paper: #ffffff;
  --ink: #222222;
  --muted: #555555;
  --line: #dddddd;
  --red: #bf4b35;
  --green: #546958;
}
* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    system-ui,
    -apple-system,
    'Yu Gothic',
    sans-serif;
  font-size: 16px;
}
.game-shell {
  width: min(560px, calc(100% - 36px));
  margin: 34px auto 26px;
}
.masthead {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
h1 {
  font-family: Tower, sans-serif;
  font-size: 34px;
  line-height: 1.2;
  letter-spacing: 0.09em;
  margin: 0;
  font-weight: 700;
}
.scoreboard {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 15px 0;
  margin-bottom: 15px;
}
.scoreboard > div {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}
.scoreboard > div:first-child {
  border: 0;
  padding-left: 0;
}
.scoreboard span {
  display: block;
  font-size: 16px;
  letter-spacing: normal;
  color: var(--muted);
}
.scoreboard strong {
  display: block;
  font-size: 32px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  margin-top: 3px;
}
.scoreboard small {
  font-size: 16px;
  color: var(--muted);
  margin-left: 6px;
}
.scoreboard > div:first-child strong {
  color: var(--red);
}
.stage {
  position: relative;
  border: 1px solid var(--line);
  background: #ffffff;
  overflow: hidden;
}
.stage canvas {
  display: block;
  width: 100%;
  height: auto;
  outline-offset: -4px;
}
.stage-top,
.stage-bottom {
  position: absolute;
  left: 18px;
  right: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  color: var(--muted);
  pointer-events: none;
  z-index: 1;
}
.stage-top {
  top: 14px;
}
.stage-bottom {
  bottom: 12px;
  justify-content: flex-end;
  font-size: 16px;
}
.stage-top > span:before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--red);
  margin-right: 6px;
}
.debug-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  pointer-events: auto;
  cursor: pointer;
}
input[type='checkbox'] {
  accent-color: var(--green);
}
.empty {
  position: absolute;
  top: 28%;
  left: 0;
  right: 0;
  text-align: center;
  pointer-events: none;
  color: var(--muted);
}
.empty h2 {
  font-size: 17px;
  font-weight: 500;
  color: #555555;
  letter-spacing: normal;
}
.input-panel {
  padding: 19px 0 4px;
}
form > label {
  font-size: 16px;
  letter-spacing: normal;
  display: block;
  margin-bottom: 9px;
}
.input-row {
  display: flex;
  gap: 10px;
}
input[type='text'] {
  min-width: 0;
  width: 100%;
  border: 1px solid #c9cdbf;
  border-radius: 4px;
  background: #ffffff;
  padding: 4px 18px;
  color: var(--ink);
  font-size: 26px;
  height: 54px;
  font-family: Tower, system-ui, sans-serif;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: 0;
  border-radius: 4px;
  font-size: 16px;
}
button:disabled {
  opacity: 0.45;
  cursor: wait;
}
button:focus-visible,
input:focus-visible,
canvas:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}
#spawn,
.game-over button {
  background: var(--red);
  color: white;
  min-width: 150px;
  padding: 0 21px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
}
#spawn:hover:not(:disabled),
.game-over button:hover {
  background: #a83d2a;
}
.suggestions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 13px;
}
.suggestions > span {
  color: var(--muted);
  font-size: 16px;
  margin-right: 4px;
}
.suggestions button {
  background: transparent;
  border: 1px solid var(--line);
  width: 40px;
  height: 40px;
  color: var(--ink);
  font-family: Tower, sans-serif;
}
.suggestions button:hover {
  background: #f3f3f3;
  border-color: #b2bda5;
}
#message {
  font-size: 16px;
  color: var(--green);
  min-height: 18px;
  margin: 10px 0;
}
#message.error {
  color: var(--red);
}
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  gap: 10px;
}
.keys {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 16px;
}
.keys > span {
  white-space: nowrap;
}
kbd {
  font: 14px system-ui;
  display: inline-block;
  border: 1px solid #d4d7ca;
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 2px 4px;
  margin-right: 2px;
  background: #ffffff;
  color: var(--ink);
}
.restart {
  background: transparent;
  font-size: 16px;
  white-space: nowrap;
  color: var(--muted);
  padding: 6px 0;
}
.restart:hover {
  color: var(--red);
}
.game-over {
  position: absolute;
  inset: 0;
  background: #fffffff2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 3;
}
.game-over[hidden],
.empty[hidden] {
  display: none;
}
.game-over h2 {
  font-size: 28px;
  letter-spacing: 0.1em;
}
.game-over p {
  line-height: 1.8;
}
.game-over button {
  height: 48px;
  margin-top: 18px;
}
@media (min-width: 900px) {
  .game-shell {
    width: 500px;
    margin-top: 28px;
  }
}
@media (max-width: 420px) {
  .game-shell {
    width: calc(100% - 24px);
    margin-top: 20px;
  }
  h1 {
    font-size: 29px;
  }
  .scoreboard > div {
    padding-left: 12px;
  }
  .scoreboard strong {
    font-size: 28px;
  }
  .suggestions {
    gap: 5px;
  }
  .suggestions button {
    width: 36px;
  }
  footer {
    align-items: flex-start;
  }
  .keys {
    gap: 7px;
  }
  #spawn {
    min-width: 130px;
  }
}

.used-characters {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  margin: 6px 0;
}

.used-characters {
  overflow-wrap: anywhere;
}

.suggestions button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
  text-decoration: line-through;
  background: transparent;
  border-color: var(--line);
}

.mode-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 20px 0 16px;
  font-size: 16px;
  color: var(--green);
}
.mode-toolbar button {
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.mode-select {
  position: absolute;
  inset: 0;
  z-index: 4;
  background: #ffffff;
  padding: 25px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  overflow-y: auto;
}
.mode-select h2 {
  font-size: 24px;
  margin: 0 0 2px;
}
.mode-card {
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 17px;
}
.mode-card h3 {
  margin: 6px 0;
  font-size: 24px;
}
.mode-card button {
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 12px 15px;
  background: var(--ink);
  color: white;
}
.rush-card {
  border-color: #d9a998;
  background: #ffffff;
}
.rush-card button {
  background: var(--red);
}
.score-rules {
  border: 0;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 16px;
}
.score-rules label {
  display: flex;
  align-items: center;
  gap: 3px;
  cursor: pointer;
}
.score-rules input {
  accent-color: var(--green);
}
#mode-loading {
  font-size: 16px;
  color: var(--muted);
  margin: 0;
  text-align: center;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}
.rush-panel {
  padding: 18px 0 10px;
}
.rush-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
  color: var(--red);
  letter-spacing: normal;
}
.drop-track {
  height: 4px;
  margin: 10px 0 14px;
  background: #eeeeee;
  overflow: hidden;
  border-radius: 2px;
}
#drop-progress {
  height: 100%;
  width: 100%;
  background: var(--red);
  transform-origin: left;
}
.next-row {
  display: flex;
  align-items: center;
  gap: 15px;
  color: var(--muted);
  font-size: 16px;
}
#next-characters {
  display: flex;
  gap: 8px;
}
#next-characters span {
  display: inline-flex;
  width: 40px;
  height: 43px;
  align-items: center;
  justify-content: center;
  font:
    25px Tower,
    sans-serif;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--ink);
}
#next-characters span:first-child {
  color: var(--red);
  border-color: #d9a998;
}
.countdown {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  background: #ffffffd9;
  color: var(--red);
  font-size: 80px;
  font-weight: 700;
  pointer-events: none;
  z-index: 2;
}
.stack-feedback {
  position: absolute;
  top: 40px;
  left: 18px;
  padding: 5px 8px;
  background: #ffffffe6;
  border-radius: 3px;
  color: var(--red);
  font-size: 16px;
  font-weight: 700;
  pointer-events: none;
  z-index: 2;
}
body[data-mode='dopamine'] .stage {
  border-color: #d9a998;
}
@media (max-width: 420px) {
  .mode-select {
    padding: 13px;
    gap: 8px;
    justify-content: flex-start;
  }
  .mode-select h2 {
    font-size: 16px;
  }
  .mode-card {
    padding: 12px;
  }
  .mode-card h3 {
    font-size: 22px;
  }
  .score-rules {
    margin-bottom: 8px;
    gap: 6px;
    font-size: 16px;
  }
}

#mode-loading:empty {
  display: none;
}

/* ゲーム領域だけブラウザーのスクロールとジェスチャーを止める。 */
.stage canvas {
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.touch-help { display: none; }
@media (pointer: coarse) {
  .keys { display: none; }
  .touch-help { display: block; margin: 0; font-size: 16px; }
  .mode-toolbar { gap: 12px; flex-wrap: wrap; }
  .stage-top { font-size: 13px; gap: 8px; }
  .scoreboard > div { padding-left: 8px; }
  .scoreboard span { font-size: 14px; }
  footer { flex-wrap: wrap; }
}