/* Arcade unified theme */
:root {
  --bg-deep: #0a0a0f;
  --bg-glow: #1a1230;
  --panel: #14151c;
  --panel-2: #1e1f29;
  --border: #2b2d3a;
  --neon: #00f5ff;
  --neon-2: #ffcc00;
  --danger: #ff4b4b;
  --success: #6dff7a;
  --text: #f2f5ff;
  --muted: #b9c1d6;
  --tile-bg: #0f1118;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

body {
  background: radial-gradient(circle at 30% 20%, #2b1447 0%, #0b0b10 40%, #05060a 100%);
  color: var(--text);
  font-family: "Courier New", Courier, monospace;
  margin: 0;
  overflow: hidden;
}

html,
body {
  width: 100%;
  height: 100%;
}

.container,
.row {
  width: 100% !important;
  height: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
}

#gameboard {
  position: relative;
  width: 100vw !important;
  height: 100dvh;
  min-height: 100vh;
  margin: 0 !important;
  overflow: hidden;
}

#viewport {
  text-align: center;
  color: var(--text);
  background: linear-gradient(180deg, #151824, #0b0c12);
  border: 2px solid var(--border);
  box-shadow: var(--shadow), inset 0 0 30px rgba(0, 245, 255, 0.06);
  font-family: "Courier New", Courier, monospace;
  touch-action: manipulation;
}

/* tiles */
.square0,
.square1,
.square2,
.square3,
.square4,
.square5 {
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  background-color: var(--tile-bg);
  border-radius: 4px;
  box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.04),
    inset 0 0 2px rgba(0, 0, 0, 0.7);
}

.square0 { background-image: url("pic/1.png"); }
.square1 { background-image: url("pic/2.png"); }
.square2 { background-image: url("pic/3.png"); }
.square3 { background-image: url("pic/4.png"); }
.square4 { background-image: url("pic/5.png"); }
.square5 { background-image: url("pic/6.png"); }

.picked {
  box-shadow: 0 0 0 2px var(--neon), 0 0 14px rgba(0, 245, 255, 0.7);
}

/* help area */
.help {
  text-align: center;
}

#dashboard {
  position: relative;
  z-index: 2;
}

#tutorial {
  border-radius: 8px !important;
  background: linear-gradient(180deg, #ff6a00 0%, #d13d00 100%) !important;
  border: 2px solid #ff8a3d !important;
  cursor: pointer;
  color: #fff;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.7);
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.4), 0 0 12px rgba(255, 106, 0, 0.4);
  position: relative;
  z-index: 5 !important;
  pointer-events: auto;
}

.help .tutorial {
  font-size: 28px;
  font-weight: bold;
  white-space: normal;
  overflow-wrap: break-word;
  word-break: break-word;
  color: var(--neon-2);
  text-shadow: 0 0 10px rgba(255, 204, 0, 0.6), 0 2px 0 rgba(0, 0, 0, 0.8);
}

.tutorial-hint {
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
  margin: 6px auto 0;
  padding-left: 10px;
  border-left: 3px solid var(--neon);
  text-align: left;
  max-width: 260px;
}

.control-text {
  display: inline-block;
}

.control-refresh {
  font-size: 18px !important;
  letter-spacing: 0.5px;
}

.help .time,
.help .score {
  font-size: 16px;
  margin-top: auto;
  margin-bottom: auto;
  white-space: normal;
  overflow-wrap: break-word;
  word-break: break-word;
  color: var(--text);
}

.combo-text {
  margin: 2px 0 0;
  font-size: 13px;
  color: #ffef99;
  text-shadow: 0 0 6px rgba(255, 215, 0, 0.8);
}

/* tutorial overlay */
.tutorialboardOff {
  background-color: #000;
}

.tutorialboardOn {
  background: linear-gradient(180deg, rgba(15, 15, 20, 0.96), rgba(5, 5, 8, 0.96));
  border-radius: 10px;
  border: 2px solid var(--border);
  box-shadow: var(--shadow), inset 0 0 20px rgba(255, 255, 255, 0.04);
  padding: 8px;
  position: relative;
  z-index: 1 !important;
  pointer-events: none;
}

#tutorialboard h3 {
  color: var(--neon-2);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 0 0 10px rgba(255, 204, 0, 0.6), 2px 2px 0 rgba(0, 0, 0, 0.8);
}

.tutorial {
  font-family: "Courier New", Courier, monospace;
  font-weight: bold;
  color: #fff;
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.6), 0 2px 0 rgba(0, 0, 0, 0.85);
  font-size: 22px;
  max-width: 100%;
  overflow-wrap: break-word;
  word-wrap: break-word;
  word-break: break-word;
  white-space: normal;
}

.tutorial-film {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 8px;
  background: #000;
  border: 4px solid #222;
  border-radius: 6px;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 1);
}

.tutorial-preview {
  display: grid;
  grid-template-columns: repeat(4, 42px);
  grid-template-rows: repeat(4, 42px);
  gap: 4px;
  background: #0b0b10;
  padding: 6px;
  border: 2px solid #222;
  border-radius: 6px;
}

.tutorial-tile {
  width: 42px;
  height: 42px;
  border-radius: 4px;
  background-color: var(--tile-bg);
  box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.04),
    inset 0 0 2px rgba(0, 0, 0, 0.7);
}

.tutorial-hint-corner {
  animation: tutorialHintFlash 1.2s ease-in-out infinite;
}

@keyframes tutorialHintFlash {
  0% {
    box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.04),
      inset 0 0 2px rgba(0, 0, 0, 0.7);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 8px 3px rgba(255, 215, 0, 0.9) inset,
      0 0 8px 3px rgba(255, 215, 0, 0.6);
    transform: scale(1.03);
  }
  100% {
    box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.04),
      inset 0 0 2px rgba(0, 0, 0, 0.7);
    transform: scale(1);
  }
}

.tutorial-first {
  font-size: 16px;
  color: #f2e6c9;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.9);
  max-width: 260px;
  text-align: left;
  overflow-wrap: break-word;
  word-wrap: break-word;
  word-break: break-word;
  background: rgba(0, 0, 0, 0.45);
  padding: 12px !important;
  border-radius: 10px;
  line-height: 1.6;
  border-left: 4px solid var(--neon-2);
  margin: 10px 5px !important;
  box-shadow: inset 1px 1px 4px rgba(0, 0, 0, 0.5);
}

/* stage 4 intro overlay */
.stage-info-gob {
  /* Keep top readable, but preserve bottom controls visibility. */
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.72) 0%,
    rgba(0, 0, 0, 0.62) 54%,
    rgba(0, 0, 0, 0.25) 78%,
    rgba(0, 0, 0, 0.02) 100%
  );
  pointer-events: none;
  z-index: 40 !important;
}

.stage4-intro-wrap {
  box-sizing: border-box;
  height: 100%;
  padding-bottom: 76px !important; /* keep tutorial/resume button unobstructed */
}

.stage-info {
  color: var(--text);
  text-align: left;
  max-width: 280px;
  margin: 0 auto;
  max-height: calc(100% - 76px);
  overflow: auto;
}

.stage-info h3,
#tutorialboard h3 {
  text-align: center;
}

.stage-copy .tutorial,
.stage-info .tutorial {
  text-align: left;
  line-height: 1.45;
}

.stage-copy .tutorial-hint,
.stage-info .tutorial-hint {
  margin-left: 0;
  margin-right: 0;
}

.stage4-cta {
  margin-top: 10px !important;
  border-left-color: var(--neon-2);
  color: #ffe082;
  font-style: normal;
  background: rgba(0, 0, 0, 0.3);
  padding: 8px 10px;
  border-radius: 8px;
}

#tutorial.stage4-resume-focus {
  z-index: 60 !important;
  box-shadow:
    0 0 0 2px rgba(255, 230, 90, 0.9),
    0 0 18px rgba(255, 190, 0, 0.85),
    0 6px 0 rgba(0, 0, 0, 0.38) !important;
  animation: resumePulse 900ms ease-in-out infinite;
}

@keyframes resumePulse {
  0% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.03);
    filter: brightness(1.15);
  }
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
}

.game-over-title,
.you-got-text,
.score-display {
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.8);
}

.game-over-panel {
  width: min(94vw, 280px);
  margin: 0 auto;
}

.game-over-title {
  margin: 4px 0;
  font-size: 28px;
}

.you-got-text {
  margin: 2px 0;
  font-size: 18px;
}

.score-display {
  margin: 4px 0 6px;
  font-size: 30px;
}

.stage-info button,
#stage4Resume,
#confirmName,
#skipName,
#skipOnly {
  padding: 6px 12px;
  margin: 4px;
  font-weight: bold;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-family: "Courier New", Courier, monospace;
}

#stage4Resume {
  background: linear-gradient(180deg, #00e6ff, #008fb3);
  color: #001018;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.6);
}

/* hint highlight */
.hint {
  box-shadow: 0 0 8px 3px rgba(255, 215, 0, 0.9) inset,
    0 0 8px 3px rgba(255, 215, 0, 0.6);
  transition: box-shadow 0.2s ease-in-out, transform 0.2s ease;
  transform: scale(1.02);
}

.hint-dim {
  filter: brightness(0.6);
  transition: filter 0.2s ease-in-out;
}

/* leaderboard */
.leaderboard {
  text-align: center;
  max-height: 130px;
  overflow: auto;
  font-size: 14px;
  color: var(--neon-2);
  text-shadow: 0 0 6px rgba(255, 215, 0, 0.8), 0 0 12px rgba(255, 69, 0, 0.5);
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.3));
  padding: 8px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.leaderboard h4 {
  margin: 2px 0 4px;
  font-size: 15px;
}

.leaderboard-item {
  padding: 4px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  line-height: 1.25;
}

/* name picker */
.name-picker {
  text-align: center;
  margin: 6px 0;
}

.name-picker .letter {
  display: inline-block;
  width: 48px;
  height: 48px;
  overflow: hidden;
  vertical-align: middle;
  margin: 0 6px;
  border-radius: 4px;
  background: linear-gradient(180deg, #20232e, #0a0b10);
  box-shadow: inset 0 -8px 16px rgba(255, 255, 255, 0.02);
  border: 1px solid #2b2d3a;
}

.name-picker .letter .strip {
  display: block;
  transition: transform 260ms cubic-bezier(0.2, 0.9, 0.3, 1);
  will-change: transform;
  transform: translate3d(0, 0, 0);
}

.name-picker .letter .strip span {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  line-height: 1;
  font-size: 28px;
  font-weight: bold;
  color: var(--neon-2);
  text-shadow: 0 0 8px rgba(255, 215, 0, 0.8);
}

.name-picker .name-columns {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
}

.name-picker .letter-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.name-picker .letter-up,
.name-picker .letter-down {
  width: 40px;
  height: 24px;
  font-size: 14px;
  border-radius: 6px;
  border: none;
  margin: 4px 0;
  cursor: pointer;
  color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}

.name-picker .letter-up {
  background: linear-gradient(180deg, #6dff7a, #2e9e4a);
}

.name-picker .letter-down {
  background: linear-gradient(180deg, #ff6b6b, #c62828);
}

.name-picker .letter-up:active,
.name-picker .letter-down:active {
  transform: translateY(2px);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.arrow {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  filter: drop-shadow(0 1px 0 rgba(0, 0, 0, 0.6));
}

.letter-up .arrow {
  transform: translateY(2px) rotate(225deg);
}

.letter-down .arrow {
  transform: translateY(-2px) rotate(45deg);
}

.name-picker .slider {
  width: 120px;
  display: block;
  margin: 6px auto;
  opacity: 0;
  height: 1px;
}

.name-picker button#confirmName {
  background: var(--neon-2);
  color: #111;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.6);
}

.name-picker button#skipName,
#skipOnly {
  background: #3c3f4f;
  color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
}

.name-picker + .leaderboard {
  margin-top: 6px;
}

/* score pop animation */
.score-pop {
  position: absolute;
  left: 50%;
  top: 12%;
  transform: translateX(-50%);
  pointer-events: none;
  font-size: 42px;
  font-weight: bold;
  color: #ffff66;
  -webkit-text-stroke: 2px #000;
  text-shadow: 0 0 14px rgba(255, 255, 102, 0.95),
    0 6px 18px rgba(0, 0, 0, 0.85);
  max-width: 260px;
  text-align: center;
  white-space: normal;
  overflow-wrap: break-word;
  word-break: break-word;
}

.score-pop-line {
  line-height: 1.15;
}

.score-pop-combo {
  color: #9dff8d;
  text-shadow: 0 0 10px rgba(109, 255, 122, 0.95);
}

.score-pop.animate {
  animation: scorePop 900ms ease-out forwards;
}

@keyframes scorePop {
  0% { transform: translateX(-50%) translateY(0) scale(0.6); opacity: 0; }
  50% { transform: translateX(-50%) translateY(-20px) scale(1.15); opacity: 1; }
  100% { transform: translateX(-50%) translateY(-40px) scale(1); opacity: 0; }
}

.viewport-clear-flash {
  animation: viewportClearFlash 160ms ease-out;
}

@keyframes viewportClearFlash {
  0% {
    box-shadow: var(--shadow), inset 0 0 30px rgba(0, 245, 255, 0.06);
    filter: brightness(1);
  }
  40% {
    box-shadow: var(--shadow), inset 0 0 34px rgba(255, 240, 120, 0.24);
    filter: brightness(1.08);
  }
  100% {
    box-shadow: var(--shadow), inset 0 0 30px rgba(0, 245, 255, 0.06);
    filter: brightness(1);
  }
}

.stage-toast {
  position: absolute;
  left: 50%;
  top: 14px;
  transform: translateX(-50%);
  z-index: 30;
  padding: 8px 12px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(255, 193, 7, 0.95), rgba(255, 152, 0, 0.95));
  color: #111;
  font-size: 13px;
  font-weight: bold;
  letter-spacing: 0.2px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
  animation: stageToastInOut 1.8s ease both;
  pointer-events: none;
}

@keyframes stageToastInOut {
  0% { opacity: 0; transform: translateX(-50%) translateY(-6px) scale(0.96); }
  12% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
  84% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-6px) scale(0.98); }
}

/* hint icons area */
#hintArea {
  display: inline-block;
  vertical-align: top;
  margin-left: 8px;
}

.hint-icon {
  display: inline-block;
  width: 18px;
  height: 18px;
  margin-right: 4px;
  border-radius: 3px;
  background: var(--neon-2);
  color: #222;
  text-align: center;
  line-height: 18px;
  font-weight: bold;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.hint-icon.empty {
  background: #eee;
  color: #bbb;
}

.hint-icon.pulse {
  animation: hintPulse 0.5s ease;
}

@keyframes hintPulse {
  0% { transform: scale(1); box-shadow: 0 0 0 rgba(255, 215, 0, 0); }
  50% { transform: scale(1.25); box-shadow: 0 0 8px rgba(255, 215, 0, 0.9); }
  100% { transform: scale(1); box-shadow: 0 0 0 rgba(255, 215, 0, 0); }
}

.rank-flash-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.rank-flash {
  width: min(88vw, 260px);
  border: 2px solid #ffc600;
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(17, 18, 24, 0.95), rgba(7, 8, 12, 0.95));
  box-shadow: 0 0 14px rgba(255, 198, 0, 0.35);
  text-align: center;
  padding: 14px 10px;
  color: #ffe082;
}

.rank-flash h3 {
  margin: 0 0 8px 0;
  font-size: 20px;
  letter-spacing: 0.4px;
}

.rank-flash p {
  margin: 0;
  font-size: 24px;
  font-weight: bold;
}

.rank-flash-anim {
  animation: rankFlash 260ms ease-in-out infinite alternate;
}

@keyframes rankFlash {
  0% { opacity: 0.55; transform: scale(0.98); }
  100% { opacity: 1; transform: scale(1); }
}

@media (max-height: 620px) {
  .leaderboard {
    max-height: 96px;
    font-size: 12px;
  }
  .score-display {
    font-size: 26px;
  }
  .name-picker .letter {
    width: 44px;
    height: 44px;
  }
  .name-picker .letter .strip span {
    height: 44px;
    line-height: 1;
    font-size: 24px;
  }
}