:root {
  --bg-top: #060816;
  --bg-mid: #0a1333;
  --bg-bottom: #1d0e43;
  --panel-bg: rgba(8, 16, 40, 0.82);
  --panel-bg-strong: rgba(6, 12, 28, 0.9);
  --cyan: #4de2ff;
  --pink: #ff48d3;
  --orange: #ff9f1a;
  --text: #eef7ff;
  --muted: #a9bad9;
  --border: rgba(111, 214, 255, 0.28);
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.45);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --button-shadow: 0 10px 20px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(77, 226, 255, 0.08), transparent 32%),
    linear-gradient(180deg, var(--bg-top), var(--bg-mid) 52%, var(--bg-bottom));
}

body {
  min-height: 100vh;
}

button,
canvas {
  touch-action: manipulation;
}

.page-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
}

.page-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(3, 6, 20, 0.25), rgba(3, 6, 20, 0.7)),
    url("./assets/neon-grid-bg.png") center top / cover no-repeat;
  opacity: 0.95;
}

.page-noise {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 4px, 4px 100%;
  opacity: 0.08;
  pointer-events: none;
}

.game-layout {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 28px;
}

.hero-copy {
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--cyan);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-size: 0.74rem;
}

.hero-copy h1 {
  margin: 0;
  font-family: Impact, "Arial Black", sans-serif;
  font-size: clamp(2.6rem, 5vw, 4.6rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-shadow:
    0 0 18px rgba(77, 226, 255, 0.45),
    0 0 30px rgba(255, 72, 211, 0.28);
}

.hero-text {
  max-width: 620px;
  margin: 10px 0 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--muted);
}

.play-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 360px);
  gap: 24px;
  align-items: start;
}

.board-shell,
.side-panel,
.touch-panel {
  position: relative;
}

.panel-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(8, 18, 46, 0.88), rgba(7, 11, 29, 0.92)),
    var(--panel-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.board-shell::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: 36px;
  background:
    radial-gradient(circle at top, rgba(77, 226, 255, 0.18), transparent 36%),
    radial-gradient(circle at bottom, rgba(255, 72, 211, 0.14), transparent 34%);
  filter: blur(18px);
  pointer-events: none;
}

.board-frame {
  position: relative;
  border-radius: 34px;
  padding: 20px;
  background:
    linear-gradient(180deg, rgba(4, 11, 28, 0.84), rgba(4, 11, 28, 0.98)),
    url("./assets/arcade-panel.png") center / cover no-repeat;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.board-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 14%);
  pointer-events: none;
}

#board {
  display: block;
  width: min(100%, 360px);
  aspect-ratio: 1 / 2;
  margin: 0 auto;
  border-radius: 18px;
  background: rgba(4, 10, 28, 0.92);
  box-shadow:
    inset 0 0 0 2px rgba(77, 226, 255, 0.12),
    inset 0 0 28px rgba(8, 23, 52, 0.95);
}

.board-overlay {
  position: absolute;
  inset: 20px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 22px;
  border-radius: 18px;
  background: rgba(3, 7, 19, 0.68);
  backdrop-filter: blur(6px);
}

.board-overlay.visible {
  display: flex;
}

.overlay-card {
  width: min(100%, 310px);
  padding: 20px 20px 18px;
  border-radius: 22px;
  background: rgba(7, 14, 36, 0.88);
  border: 1px solid rgba(77, 226, 255, 0.22);
  box-shadow: 0 18px 32px rgba(0, 0, 0, 0.32);
  text-align: center;
}

.overlay-kicker {
  margin: 0 0 8px;
  color: var(--cyan);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.overlay-card h2 {
  margin: 0;
  font-size: 1.8rem;
}

.overlay-card p {
  margin: 10px 0 18px;
  line-height: 1.5;
  color: var(--muted);
}

.side-panel {
  display: grid;
  gap: 16px;
}

.next-panel,
.controls-card {
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(7, 15, 38, 0.76), rgba(4, 10, 27, 0.92)),
    url("./assets/arcade-panel.png") center / cover no-repeat;
}

.panel-heading,
.touch-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-heading h2,
.controls-card h2,
.touch-heading h2 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-pill {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.76rem;
  background: rgba(77, 226, 255, 0.12);
  border: 1px solid rgba(77, 226, 255, 0.2);
  color: var(--cyan);
}

#nextPiece {
  display: block;
  width: 120px;
  height: 120px;
  margin: 10px auto 0;
  border-radius: 16px;
  background: rgba(4, 10, 26, 0.82);
  box-shadow: inset 0 0 0 1px rgba(77, 226, 255, 0.12);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 16px;
}

.stat-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stat-value {
  display: block;
  font-family: "Courier New", monospace;
  font-size: clamp(1.4rem, 4vw, 2rem);
  color: white;
  text-shadow: 0 0 18px rgba(77, 226, 255, 0.22);
}

.controls-card {
  padding: 16px 16px 10px;
}

.controls-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.controls-list li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--muted);
}

.controls-list li span:first-child {
  color: var(--text);
  font-family: "Courier New", monospace;
}

.action-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.primary-button,
.secondary-button,
.touch-button {
  border: 0;
  border-radius: 16px;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  transition:
    transform 120ms ease,
    box-shadow 120ms ease,
    filter 120ms ease,
    opacity 120ms ease;
}

.primary-button,
.secondary-button {
  min-height: 48px;
  padding: 12px 14px;
  box-shadow: var(--button-shadow);
}

.primary-button {
  background: linear-gradient(135deg, var(--pink), var(--orange));
}

.secondary-button {
  background: linear-gradient(180deg, rgba(16, 31, 68, 0.95), rgba(10, 20, 45, 0.95));
  border: 1px solid rgba(77, 226, 255, 0.18);
}

.primary-button:hover,
.secondary-button:hover,
.touch-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 24px rgba(0, 0, 0, 0.28);
}

.primary-button:active,
.secondary-button:active,
.touch-button:active {
  transform: translateY(1px) scale(0.99);
}

.primary-button:disabled,
.secondary-button:disabled,
.touch-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  filter: saturate(0.4);
}

.touch-panel {
  margin-top: 22px;
  padding: 18px;
  background:
    linear-gradient(180deg, rgba(7, 15, 38, 0.76), rgba(4, 10, 27, 0.92)),
    url("./assets/arcade-panel.png") center bottom / cover no-repeat;
}

.touch-heading p {
  margin: 8px 0 0;
  color: var(--muted);
}

.touch-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.touch-button {
  min-height: 58px;
  padding: 14px 12px;
  background: linear-gradient(180deg, rgba(17, 36, 80, 0.96), rgba(11, 20, 45, 0.96));
  border: 1px solid rgba(77, 226, 255, 0.16);
  box-shadow: var(--button-shadow);
}

.touch-button-accent {
  background: linear-gradient(135deg, rgba(255, 72, 211, 0.95), rgba(255, 159, 26, 0.95));
}

@media (max-width: 979px) {
  .play-area {
    grid-template-columns: minmax(0, 1fr) 320px;
  }

  .action-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 699px) {
  .game-layout {
    width: min(100% - 20px, 700px);
    padding-top: 20px;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-text {
    margin-left: auto;
    margin-right: auto;
  }

  .play-area {
    grid-template-columns: 1fr;
  }

  .board-frame {
    padding: 14px;
  }

  .board-overlay {
    inset: 14px;
  }

  #board {
    width: min(100%, 350px);
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .touch-panel {
    padding: 16px;
  }

  .touch-heading {
    display: block;
  }

  .touch-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .touch-button:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .game-layout {
    width: calc(100% - 14px);
  }

  .hero-copy h1 {
    letter-spacing: 0.08em;
  }

  .panel-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .stat-card,
  .next-panel,
  .controls-card,
  .touch-panel {
    border-radius: 18px;
  }
}