:root {
  --navy: #0b0f1c;
  --navy-2: #141a2e;
  --deep: #1d2745;
  --blue: #2e3f6b;
  --blue-soft: #43568c;
  --teal: #3fd2c5;
  --teal-dim: #2a8f86;
  --orange: #f0a35e;
  --orange-deep: #e8763a;
  --cream: #f2ead9;
  --cream-dim: #b9b29f;
  --danger: #e85e6b;
  --mono: "Cascadia Mono", "Segoe UI Mono", "DejaVu Sans Mono", Menlo, Consolas, "Lucida Console", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: var(--navy);
  overflow: hidden;
  font-family: var(--mono);
  color: var(--cream);
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
}

#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(120% 90% at 50% 0%, #182042 0%, #0b0f1c 60%, #070a14 100%);
}

#game-canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  /* slight letterbox bars are produced by object-fit on dark bg */
}

/* ---------------- HUD ---------------- */
#hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: clamp(6px, 1.6vh, 14px) clamp(8px, 1.6vw, 18px);
  pointer-events: none;
  z-index: 20;
  font-size: clamp(10px, 1.5vmin, 14px);
  letter-spacing: 1px;
}
#hud-left { display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
#hud-right { display: flex; align-items: center; gap: 10px; }

#hud-health { display: flex; gap: 4px; }
#hud-health .cell {
  width: 16px; height: 12px;
  background: var(--teal);
  border: 2px solid var(--navy-2);
  box-shadow: 0 0 6px rgba(63,210,197,.55);
  border-radius: 2px;
  transition: background .15s, box-shadow .15s;
}
#hud-health .cell.empty {
  background: #232c4a;
  box-shadow: none;
}

.hud-stat { display: flex; align-items: center; gap: 7px; color: var(--cream); }
.stat-icon {
  width: 10px; height: 10px; flex: none;
  background: var(--teal);
  box-shadow: 0 0 6px rgba(63,210,197,.7);
  transform: rotate(45deg);
}
.stat-icon.core {
  background: var(--orange);
  box-shadow: 0 0 7px rgba(240,163,94,.8);
  border-radius: 2px;
  transform: none;
}

#hud-dash {
  width: 64px; height: 8px;
  background: #232c4a;
  border: 2px solid var(--navy-2);
  border-radius: 2px;
  overflow: hidden;
}
#dash-fill {
  height: 100%; width: 100%;
  background: var(--blue-soft);
  transition: width .05s linear;
}
#dash-fill.ready {
  background: var(--teal);
  box-shadow: 0 0 8px rgba(63,210,197,.8);
}

.hud-button {
  pointer-events: auto;
  font-family: var(--mono);
  font-size: clamp(10px, 1.4vmin, 13px);
  letter-spacing: 2px;
  color: var(--cream);
  background: rgba(20,26,46,.85);
  border: 2px solid var(--blue-soft);
  border-radius: 3px;
  padding: 5px 9px;
  cursor: pointer;
}
.hud-button:hover { border-color: var(--teal); color: var(--teal); }

/* ---------------- HINT TOAST ---------------- */
#hint {
  position: absolute;
  left: 50%; bottom: 12%;
  transform: translateX(-50%);
  background: rgba(13,18,34,.88);
  border: 2px solid var(--teal-dim);
  color: var(--cream);
  font-size: clamp(10px, 1.5vmin, 13px);
  letter-spacing: 2px;
  padding: 7px 14px;
  border-radius: 3px;
  z-index: 25;
  opacity: 0;
  transition: opacity .35s;
  pointer-events: none;
  white-space: nowrap;
}
#hint.show { opacity: 1; }

/* ---------------- TOUCH CONTROLS ---------------- */
#touch-controls {
  position: absolute;
  inset: 0;
  z-index: 30;
  pointer-events: none;
}
.tbtn {
  position: absolute;
  pointer-events: auto;
  font-family: var(--mono);
  color: var(--cream);
  background: rgba(46,63,107,.42);
  border: 2px solid rgba(63,210,197,.45);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .1s, transform .1s;
}
.tbtn:active, .tbtn.active {
  background: rgba(63,210,197,.35);
  transform: scale(.94);
}
.tbtn-move { width: clamp(52px, 9vmin, 74px); height: clamp(52px, 9vmin, 74px); bottom: 5%; font-size: clamp(16px, 3vmin, 24px); }
.tbtn-move[data-action="left"] { left: 4%; }
.tbtn-move[data-action="right"] { left: calc(4% + clamp(58px, 10vmin, 82px)); }
.tbtn-jump { width: clamp(58px, 10vmin, 82px); height: clamp(58px, 10vmin, 82px); right: 5%; bottom: 5%; font-size: clamp(18px, 3.4vmin, 26px); }
.tbtn-dash { width: clamp(44px, 7.5vmin, 62px); height: clamp(44px, 7.5vmin, 62px); right: calc(5% + clamp(62px, 11vmin, 90px)); bottom: calc(5% + 12px); font-size: clamp(12px, 2.2vmin, 17px); letter-spacing: -1px; }

/* ---------------- MENUS ---------------- */
#menu-layer {
  position: absolute;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(7,10,20,.82);
  backdrop-filter: blur(2px);
}
#menu-layer.hidden { display: none; }

.menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(12px, 2.4vh, 22px);
  width: min(560px, 92vw);
  max-height: 94vh;
  overflow-y: auto;
  padding: clamp(16px, 3vh, 30px);
}
.menu.hidden { display: none; }

.title-block { text-align: center; }
.title-main {
  margin: 0;
  font-size: clamp(34px, 8.5vmin, 64px);
  letter-spacing: clamp(4px, 1.4vmin, 12px);
  color: var(--cream);
  text-shadow: 3px 3px 0 var(--teal-dim), 6px 6px 0 rgba(11,15,28,.7);
  font-weight: 700;
}
.title-sub {
  margin: 10px 0 0;
  font-size: clamp(13px, 2.6vmin, 20px);
  letter-spacing: clamp(6px, 2.2vmin, 18px);
  color: var(--teal);
  text-shadow: 0 0 12px rgba(63,210,197,.45);
}
.title-line {
  width: 60%;
  height: 3px;
  margin: 16px auto 0;
  background: linear-gradient(90deg, transparent, var(--teal-dim), transparent);
}

.menu-heading {
  margin: 0;
  font-size: clamp(20px, 4.4vmin, 32px);
  letter-spacing: clamp(3px, 1vmin, 8px);
  color: var(--cream);
  text-shadow: 2px 2px 0 var(--blue);
}
.menu-heading.danger { color: var(--danger); text-shadow: 2px 2px 0 #5c2230, 0 0 16px rgba(232,94,107,.4); }
.menu-heading.success { color: var(--teal); text-shadow: 2px 2px 0 var(--teal-dim), 0 0 18px rgba(63,210,197,.5); }
.menu-note { margin: -6px 0 0; font-size: clamp(10px, 1.6vmin, 13px); letter-spacing: 2px; color: var(--cream-dim); text-align: center; }

.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: clamp(8px, 1.4vh, 13px);
  width: min(300px, 80vw);
}
.mbtn {
  font-family: var(--mono);
  font-size: clamp(13px, 2.4vmin, 17px);
  letter-spacing: clamp(2px, .8vmin, 5px);
  color: var(--cream);
  background: rgba(29,39,69,.7);
  border: 2px solid var(--blue-soft);
  border-radius: 3px;
  padding: clamp(9px, 1.6vh, 13px) 10px;
  cursor: pointer;
  transition: transform .12s, border-color .12s, background .12s, color .12s;
}
.mbtn:hover, .mbtn:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  background: rgba(63,210,197,.1);
  transform: translateY(-2px);
  outline: none;
}
.mbtn:focus-visible { box-shadow: 0 0 0 3px rgba(63,210,197,.35); }
.mbtn.primary { border-color: var(--teal-dim); color: var(--teal); }
.mbtn:active { transform: translateY(0); }
.menu-footer { margin: 4px 0 0; font-size: clamp(9px, 1.4vmin, 11px); letter-spacing: 3px; color: var(--cream-dim); }

/* Level cards */
#level-cards { display: flex; flex-direction: column; gap: 10px; width: 100%; }
.level-card {
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  font-family: var(--mono);
  color: var(--cream);
  background: rgba(29,39,69,.7);
  border: 2px solid var(--blue-soft);
  border-radius: 3px;
  padding: 10px 14px;
  cursor: pointer;
  transition: transform .12s, border-color .12s;
}
.level-card:hover, .level-card:focus-visible { border-color: var(--teal); transform: translateY(-2px); outline: none; }
.level-card:focus-visible { box-shadow: 0 0 0 3px rgba(63,210,197,.35); }
.level-card.locked { opacity: .5; cursor: not-allowed; }
.level-card.locked:hover { transform: none; border-color: var(--blue-soft); }
.level-thumb {
  width: 46px; height: 46px; flex: none;
  border: 2px solid var(--navy-2);
  border-radius: 3px;
  image-rendering: pixelated;
}
.level-info { flex: 1; min-width: 0; }
.level-name { font-size: clamp(12px, 2.2vmin, 15px); letter-spacing: 2px; }
.level-meta { font-size: clamp(9px, 1.4vmin, 11px); letter-spacing: 1px; color: var(--cream-dim); margin-top: 3px; }
.level-lock { font-size: clamp(11px, 2vmin, 14px); color: var(--cream-dim); letter-spacing: 2px; }

/* How to play */
.howto-grid { display: flex; gap: clamp(14px, 3vw, 30px); width: 100%; flex-wrap: wrap; justify-content: center; }
.howto-col { flex: 1 1 200px; max-width: 260px; }
.howto-col h3 { margin: 0 0 8px; font-size: clamp(11px, 1.8vmin, 13px); letter-spacing: 3px; color: var(--teal); }
.howto-col p { margin: 0 0 8px; font-size: clamp(10px, 1.5vmin, 12px); line-height: 1.65; letter-spacing: .5px; color: var(--cream); }
.key {
  display: inline-block;
  min-width: 18px;
  padding: 1px 5px;
  margin: 0 1px;
  border: 1px solid var(--blue-soft);
  border-bottom-width: 3px;
  border-radius: 3px;
  background: rgba(11,15,28,.6);
  font-size: .9em;
  text-align: center;
}

/* Settings */
.settings-list { display: flex; flex-direction: column; gap: 12px; width: min(340px, 84vw); }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: clamp(10px, 1.7vmin, 13px); letter-spacing: 2px; }
.setting-label { color: var(--cream-dim); }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 150px; height: 6px;
  background: #232c4a; border-radius: 3px;
  outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--teal); border: 2px solid var(--navy-2);
  box-shadow: 0 0 8px rgba(63,210,197,.6);
}
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--teal); border: 2px solid var(--navy-2);
}
input[type="checkbox"] {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px;
  border: 2px solid var(--blue-soft); border-radius: 3px;
  background: rgba(11,15,28,.6);
  cursor: pointer; position: relative;
  transition: border-color .12s;
}
input[type="checkbox"]:checked { border-color: var(--teal); }
input[type="checkbox"]:checked::after {
  content: ""; position: absolute;
  left: 4px; top: 0px;
  width: 6px; height: 12px;
  border: solid var(--teal); border-width: 0 3px 3px 0;
  transform: rotate(40deg);
}
input:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }

/* Complete stats */
#complete-stats {
  display: flex;
  flex-direction: column;
  gap: 7px;
  width: min(320px, 84vw);
  background: rgba(11,15,28,.55);
  border: 2px solid var(--blue-soft);
  border-radius: 3px;
  padding: 14px 18px;
}
.stat-line { display: flex; justify-content: space-between; font-size: clamp(11px, 1.9vmin, 14px); letter-spacing: 2px; }
.stat-line span:first-child { color: var(--cream-dim); }
.stat-line b { color: var(--cream); font-weight: 700; }
.stat-line b.perfect { color: var(--orange); text-shadow: 0 0 10px rgba(240,163,94,.6); }

/* ---------------- UTILITIES ---------------- */
.hidden { display: none !important; }

#rotate-hint {
  display: none;
  position: fixed; inset: 0; z-index: 100;
  background: var(--navy);
  color: var(--teal);
  align-items: center; justify-content: center;
  text-align: center;
  font-size: 18px; letter-spacing: 4px;
  line-height: 1.8;
}
#rotate-hint span { font-size: 11px; letter-spacing: 2px; color: var(--cream-dim); }

@media (max-height: 480px) and (orientation: portrait) {
  #rotate-hint { display: flex; }
}