:root {
  --bg: #0a0a11;
  --cabinet: #14141f;
  --edge: #2a2a3c;
  --ink: #e8e8f4;
  --dim: #8a8aa2;
  --gem: #74dcff;
  --gold: #f7dc4e;
  --danger: #e0402c;
  --grass: #3cc457;
  --font: 'Courier New', 'DejaVu Sans Mono', monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  background: radial-gradient(circle at 50% 0%, #1b1b2c 0%, var(--bg) 70%);
  color: var(--ink);
  font-family: var(--font);
  letter-spacing: 0.06em;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  user-select: none;
}

.cabinet {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 1100px;
  margin: 0 auto;
  padding: max(6px, env(safe-area-inset-top)) max(6px, env(safe-area-inset-right))
    max(6px, env(safe-area-inset-bottom)) max(6px, env(safe-area-inset-left));
  gap: 6px;
}

/* Status bar -------------------------------------------------------------- */

.hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 14px;
  padding: 6px 10px;
  background: var(--cabinet);
  border: 2px solid var(--edge);
  border-radius: 6px;
  font-size: clamp(10px, 2.6vw, 14px);
  text-transform: uppercase;
}

.hud-group {
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.hud-label {
  color: var(--dim);
  font-size: 0.8em;
}

.hud-value {
  color: var(--gold);
  font-weight: 700;
}

.hud-value.urgent {
  color: var(--danger);
  animation: blink 0.6s steps(2, end) infinite;
}

.hud-value.ready {
  color: var(--grass);
}

.hud-buttons {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

.icon-button {
  width: 34px;
  height: 28px;
  padding: 0;
  color: var(--ink);
  font-family: var(--font);
  font-size: 13px;
  background: #23233a;
  border: 2px solid var(--edge);
  border-radius: 4px;
  cursor: pointer;
}

.icon-button:active {
  background: var(--edge);
}

.icon-button.off {
  color: var(--dim);
  text-decoration: line-through;
}

/* Playfield --------------------------------------------------------------- */

.stage {
  position: relative;
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  min-height: 0;
  overflow: hidden;
  background: #05050a;
  border: 2px solid var(--edge);
  border-radius: 6px;
}

body.touch .stage {
  align-items: flex-start;
}

#screen {
  display: block;
  image-rendering: pixelated;
  touch-action: none;
}

.stage::after {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(to bottom, rgb(0 0 0 / 0%) 0 2px, rgb(0 0 0 / 18%) 2px 4px);
  pointer-events: none;
  content: '';
}

/* Panels ------------------------------------------------------------------ */

.overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  padding: 12px;
  overflow-y: auto;
  background: rgb(5 5 10 / 82%);
}

.overlay[hidden] {
  display: none;
}

.panel {
  width: min(420px, 100%);
  /* Auto margins center the panel, and on a screen too short for it (a phone held sideways) they
     give way so the panel scrolls from its top instead of being cut off at both ends. */
  margin: auto;
  padding: 18px 20px 20px;
  text-align: center;
  background: var(--cabinet);
  border: 2px solid var(--edge);
  border-radius: 8px;
  box-shadow: 0 0 0 4px rgb(0 0 0 / 40%);
}

.panel-title {
  margin: 0 0 10px;
  color: var(--gem);
  font-size: clamp(20px, 6vw, 30px);
  letter-spacing: 0.18em;
  text-shadow: 0 2px 0 #0d3a72;
}

.panel-text {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: clamp(12px, 3.2vw, 15px);
  line-height: 1.5;
}

.panel-keys {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
  color: var(--dim);
  font-size: clamp(11px, 3vw, 13px);
}

.music-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.music-step {
  flex: none;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--gem);
  font-size: 14px;
  background: #0d0d16;
  border: 2px solid var(--edge);
  border-radius: 6px;
  cursor: pointer;
}

.music-step:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.music-label {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
  line-height: 1.3;
}

.music-mode {
  color: var(--ink);
  font-size: clamp(13px, 3.6vw, 15px);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.music-now {
  color: var(--dim);
  font-size: clamp(10px, 2.8vw, 12px);
}

.toast {
  position: absolute;
  top: 10px;
  left: 50%;
  /* Above the panel's backdrop: new tunes usually start while a panel is up. */
  z-index: 4;
  padding: 6px 12px;
  color: var(--gold);
  font-size: clamp(12px, 3.4vw, 14px);
  letter-spacing: 0.08em;
  white-space: nowrap;
  background: rgb(10 10 17 / 85%);
  border: 1px solid var(--edge);
  border-radius: 4px;
  transform: translateX(-50%);
  pointer-events: none;
  opacity: 0;
}

.toast.show {
  animation: toast 2.8s ease forwards;
}

@keyframes toast {
  0% {
    opacity: 0;
  }

  10%,
  75% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

.segmented {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
  padding: 4px;
  background: #0d0d16;
  border: 2px solid var(--edge);
  border-radius: 8px;
}

.segmented[hidden] {
  display: none;
}

.segmented button {
  flex: 1;
  padding: 10px 8px;
  color: var(--dim);
  font-family: var(--font);
  font-size: clamp(12px, 3.4vw, 14px);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: transparent;
  border: 0;
  border-radius: 5px;
  cursor: pointer;
}

.segmented button[aria-checked='true'] {
  color: #05050a;
  background: var(--gem);
}

.segmented button:focus-visible,
.big-button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.support-link {
  display: block;
  margin: 10px auto -8px;
  padding: 10px 8px;
  color: var(--dim);
  font-size: clamp(11px, 3vw, 13px);
  text-decoration: none;
}

.support-link[hidden] {
  display: none;
}

.support-link:hover,
.support-link:focus-visible {
  color: var(--gold);
  text-decoration: underline;
}

.support-link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.big-button {
  width: 100%;
  padding: 14px 18px;
  color: #05050a;
  font-family: var(--font);
  font-size: clamp(14px, 4vw, 17px);
  font-weight: 700;
  letter-spacing: 0.2em;
  background: var(--gold);
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}

.big-button:active {
  background: #d8bd2f;
  transform: translateY(1px);
}

/* Touch controls ---------------------------------------------------------- */

.touch-layer {
  position: absolute;
  inset: auto 0 0;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 10px 12px 12px;
  pointer-events: none;
}

.touch-layer[hidden] {
  display: none;
}

.dpad {
  position: relative;
  width: 150px;
  height: 150px;
  pointer-events: auto;
  touch-action: none;
}

.dpad-key {
  position: absolute;
  width: 50px;
  height: 50px;
  padding: 0;
  background: rgb(35 35 58 / 72%);
  border: 2px solid rgb(120 120 160 / 55%);
  border-radius: 8px;
  cursor: pointer;
}

.dpad-key::before {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  font-size: 15px;
  content: '';
}

.dpad-key {
  pointer-events: none;
}

.dpad-key.active {
  background: rgb(90 90 140 / 85%);
  border-color: rgb(247 220 78 / 80%);
}

/* Joystick ---------------------------------------------------------------- */

.joystick {
  position: relative;
  width: min(58vw, 240px);
  height: 150px;
  pointer-events: auto;
  touch-action: none;
}

.joystick-base {
  position: absolute;
  bottom: 8px;
  left: 10px;
  width: 128px;
  height: 128px;
  background: radial-gradient(circle, rgb(60 60 95 / 60%), rgb(35 35 58 / 55%));
  border: 2px solid rgb(120 120 160 / 55%);
  border-radius: 50%;
  transform: translate(var(--bx, 0px), var(--by, 0px));
}

.joystick-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60px;
  height: 60px;
  margin: -30px 0 0 -30px;
  background: rgb(150 150 200 / 75%);
  border: 2px solid rgb(220 220 255 / 60%);
  border-radius: 50%;
  transform: translate(var(--kx, 0px), var(--ky, 0px));
}

.joystick.active .joystick-knob {
  background: rgb(247 220 78 / 85%);
  border-color: rgb(255 245 200 / 85%);
}

body[data-controls='pad'] .joystick,
body[data-controls='stick'] .dpad {
  display: none;
}

.dpad-key.up {
  top: 0;
  left: 50px;
}

.dpad-key.up::before {
  content: '▲';
}

.dpad-key.down {
  bottom: 0;
  left: 50px;
}

.dpad-key.down::before {
  content: '▼';
}

.dpad-key.left {
  top: 50px;
  left: 0;
}

.dpad-key.left::before {
  content: '◀';
}

.dpad-key.right {
  top: 50px;
  right: 0;
}

.dpad-key.right::before {
  content: '▶';
}

.dpad-hub {
  position: absolute;
  top: 50px;
  left: 50px;
  width: 50px;
  height: 50px;
  background: rgb(35 35 58 / 45%);
  border-radius: 6px;
}

.action-key {
  position: relative;
  width: 76px;
  height: 76px;
  padding: 0;
  color: var(--ink);
  font-family: var(--font);
  background: rgb(120 30 30 / 72%);
  border: 2px solid rgb(224 64 44 / 70%);
  border-radius: 50%;
  cursor: pointer;
  pointer-events: auto;
  touch-action: none;
}

.action-key.empty {
  opacity: 0.4;
}

.action-key:active {
  background: rgb(200 60 40 / 85%);
}

.action-glyph {
  font-size: 26px;
  line-height: 1;
}

.action-count {
  position: absolute;
  right: 6px;
  bottom: 6px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
}

/* Footer ------------------------------------------------------------------ */

.tips {
  padding: 4px 8px;
  color: var(--dim);
  font-size: clamp(9px, 2.4vw, 12px);
  text-align: center;
}

.tip-touch {
  display: none;
}

body.touch .tip-desktop {
  display: none;
}

body.touch .tip-touch {
  display: inline;
}

@media (width <= 560px) {
  .hud {
    gap: 2px 7px;
    padding: 4px 6px;
    font-size: 10px;
  }

  .hud-group.optional {
    display: none;
  }

  .icon-button {
    width: 28px;
    height: 24px;
    font-size: 11px;
  }
}

@keyframes blink {
  50% {
    opacity: 0.35;
  }
}

@media (height <= 560px) {
  .tips {
    display: none;
  }

  .dpad {
    width: 126px;
    height: 126px;
  }

  .dpad-key {
    width: 42px;
    height: 42px;
  }

  .dpad-key.up,
  .dpad-key.down,
  .dpad-hub {
    left: 42px;
  }

  .dpad-key.left,
  .dpad-key.right,
  .dpad-hub {
    top: 42px;
  }

  .joystick {
    height: 126px;
  }

  .joystick-base {
    width: 108px;
    height: 108px;
  }

  .joystick-knob {
    width: 50px;
    height: 50px;
    margin: -25px 0 0 -25px;
  }

  .action-key {
    width: 66px;
    height: 66px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .toast.show {
    animation: none;
    opacity: 1;
  }

  .hud-value.urgent {
    animation: none;
  }
}