:root {
  --neon: #1eff3c;
  --neon-rgb: 30, 255, 60;
  --bg: #000000;
  --panel: #070907;
  --line: rgba(255, 255, 255, 0.12);
  --text: #eef2ef;
  --muted: #8d9892;
  --red: #e8243c;
  --cyan: #46c8e6;
  --pink: #d95bc0;
}
* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Ubuntu, Arial, sans-serif;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  overscroll-behavior: none;
}
canvas#c {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: block;
  outline: none;
}
kbd {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-bottom-width: 2px;
  border-radius: 5px;
  font: 600 0.78em/1.5 ui-monospace, Menlo, Consolas, monospace;
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}
.muted {
  color: var(--muted);
}
.red {
  color: var(--red);
}
.cyan {
  color: var(--cyan);
}
body.touch .desk-only {
  display: none !important;
}

/* ---------- screens ---------- */
.screen {
  position: fixed;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 10;
  padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  overflow-y: auto;
}
.screen.show {
  display: flex;
  animation: fadein 0.2s ease;
}
.screen.dim {
  background: rgba(0, 0, 0, 0.6);
}
@keyframes fadein {
  from {
    opacity: 0;
  }
}
#loading {
  background: var(--bg);
  z-index: 30;
}
.loader {
  width: 200px;
  height: 3px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
  margin: 24px auto 12px;
}
.loader i {
  display: block;
  height: 100%;
  width: 40%;
  background: var(--neon);
  animation: load 1.1s ease-in-out infinite;
}
@keyframes load {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(260%);
  }
}

.logo {
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 52px;
  line-height: 1;
  color: #fff;
}
.logo.big {
  font-size: clamp(56px, 12vw, 112px);
}
.logo em {
  color: var(--neon);
  font-style: normal;
}
.tagline {
  margin: 10px 0 24px;
  font-size: 15px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

#menu {
  background: linear-gradient(rgba(0, 0, 0, 0.25), rgba(0, 0, 0, 0.55));
}
.back {
  position: absolute;
  top: max(14px, env(safe-area-inset-top));
  left: max(14px, env(safe-area-inset-left));
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.4);
}
.back:hover {
  color: #fff;
}

.mode-switch {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
.mode {
  width: 170px;
  padding: 11px 10px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.5);
  color: var(--text);
  cursor: pointer;
  font: inherit;
}
.mode b {
  display: block;
  font-size: 17px;
  letter-spacing: 0.1em;
}
.mode small {
  color: var(--muted);
}
.mode.active {
  border-color: var(--neon);
  background: rgba(var(--neon-rgb), 0.1);
}

.btn {
  display: inline-block;
  font: 600 15px/1 inherit;
  font-family: inherit;
  letter-spacing: 0.04em;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 11px 17px;
  margin: 5px;
  cursor: pointer;
  text-decoration: none;
  transition:
    background 0.12s,
    border-color 0.12s;
}
.btn:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(255, 255, 255, 0.25);
}
.btn:active {
  transform: translateY(1px);
}
.btn.primary {
  background: var(--neon);
  color: #06140b;
  border-color: var(--neon);
}
.btn.primary:hover {
  filter: brightness(1.08);
}
.btn.huge {
  font-size: 24px;
  font-weight: 800;
  padding: 15px 60px;
  border-radius: 11px;
  letter-spacing: 0.1em;
}
.btn.small {
  font-size: 13px;
  padding: 8px 12px;
}
.btn.danger {
  border-color: rgba(232, 36, 60, 0.5);
  color: #ff9aa8;
}
.row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 16px;
}
.hint {
  font-size: 13px;
  margin: 10px 0 0;
}
.stats {
  margin-top: 20px;
  display: flex;
  gap: 24px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.stats b {
  color: #fff;
  font-size: 18px;
  margin-left: 6px;
}
.gem-ico {
  display: inline-block;
  width: 0.8em;
  height: 0.8em;
  border-radius: 50%;
  background: #ffc928;
  border: 2px solid #b37a00;
  box-sizing: border-box;
  vertical-align: -0.05em;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  border-radius: 14px;
  padding: 24px 26px;
  min-width: 300px;
  max-width: 94vw;
  max-height: 92vh;
  max-height: 92dvh;
  overflow: auto;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.panel.wide {
  width: 600px;
  text-align: left;
}
.panel h2 {
  margin: 0 0 14px;
  letter-spacing: 0.12em;
  text-align: center;
  font-size: 22px;
}
.close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
}
#modal section {
  display: none;
}
#modal section.show {
  display: block;
}
.field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.field.check {
  justify-content: flex-start;
}
.field input[type='range'] {
  width: min(220px, 45vw);
  accent-color: var(--neon);
}
.field input[type='checkbox'] {
  width: 18px;
  height: 18px;
  accent-color: var(--neon);
}
.field select {
  background: #151a18;
  color: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 7px 8px;
  font: inherit;
  max-width: 55vw;
}
#btn-reset {
  margin-top: 16px;
  align-self: flex-start;
}
.help p {
  line-height: 1.5;
}
.help table {
  width: 100%;
  border-collapse: collapse;
}
.help td {
  padding: 7px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  vertical-align: top;
}
.help td:first-child {
  white-space: nowrap;
  width: 42%;
}

#skin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.skin {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  padding: 10px 6px;
  text-align: center;
  cursor: pointer;
  color: var(--text);
  font: inherit;
}
.skin:hover {
  border-color: rgba(255, 255, 255, 0.3);
}
.skin canvas {
  width: 64px;
  height: 64px;
  display: block;
  margin: 0 auto 6px;
}
.skin.locked canvas {
  filter: grayscale(0.8) brightness(0.55);
}
.skin.selected {
  border-color: var(--neon);
  background: rgba(var(--neon-rgb), 0.08);
}
.skin small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}

/* ---------- HUD ---------- */
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  display: none;
  z-index: 5;
}
#hud.show {
  display: block;
}
#hud-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  padding: max(12px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left));
}
#hud-best,
#hud-gems {
  font-weight: 600;
  letter-spacing: 0.1em;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
  min-width: 130px;
}
#hud-best b,
#hud-gems b {
  color: #fff;
  font-size: 18px;
}
#hud-right #hud-gems {
  min-width: 0;
  text-align: right;
}
#hud-right {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: flex-end;
  min-width: 130px;
}
#hud-center {
  text-align: center;
}
#hud-score {
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.8));
}
#hud-sub {
  white-space: nowrap;
  margin-top: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.65);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}
.icon-btn {
  pointer-events: auto;
  width: 40px;
  height: 40px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.4);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.icon-btn i {
  width: 4px;
  height: 14px;
  background: #fff;
  border-radius: 1px;
}
#hud-abilities {
  position: absolute;
  bottom: max(20px, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}
.ab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--line);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.55);
}
.ab.ready {
  color: #fff;
}
.ab .bar {
  width: 46px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.15);
  overflow: hidden;
}
.ab .bar i {
  display: block;
  height: 100%;
  width: calc(var(--p, 1) * 100%);
  background: var(--neon);
}
#ab-dash .bar i {
  background: var(--pink);
}
.ab kbd {
  font-size: 10px;
}
#ab-shield {
  display: none;
  color: var(--cyan);
  border-color: rgba(70, 200, 230, 0.5);
}
#ab-shield.on {
  display: flex;
}
#hud.classic #ab-jump,
#hud.classic #ab-dash {
  display: none;
}

#hud-powers {
  position: absolute;
  top: calc(max(12px, env(safe-area-inset-top)) + 92px);
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 8px;
}
#hud-powers span {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 5px 10px;
  border-radius: 7px;
  color: #fff;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid var(--c);
}
#banner {
  position: fixed;
  top: 24%;
  left: 0;
  right: 0;
  text-align: center;
  pointer-events: none;
  z-index: 6;
  font-size: clamp(30px, 6vw, 60px);
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
  opacity: 0;
}
#banner.go {
  animation: banner 1.2s ease forwards;
}
@keyframes banner {
  0% {
    opacity: 0;
    transform: translateY(8px);
  }
  15% {
    opacity: 1;
    transform: none;
  }
  75% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

#over .panel,
#pause .panel {
  align-items: center;
  min-width: 320px;
}
#over h2 {
  font-size: 28px;
  color: #fff;
}
#over-cause {
  margin: -6px 0 6px;
}
.score-big {
  font-size: 76px;
  font-weight: 800;
  line-height: 1;
  margin: 4px 0;
}
.badge {
  display: none;
  background: #f0b429;
  color: #1a1000;
  font-weight: 800;
  letter-spacing: 0.12em;
  border-radius: 6px;
  padding: 4px 12px;
  margin: 6px 0;
}
.badge.show {
  display: inline-block;
}
.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 12px;
  margin: 14px 0 16px;
  width: 100%;
}
.grid2 div {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  padding: 8px 10px;
}
.grid2 small {
  display: block;
  color: var(--muted);
  letter-spacing: 0.12em;
  font-size: 11px;
}
.grid2 b {
  font-size: 20px;
}
#pause .btn {
  min-width: 220px;
}

/* ---------- touch ---------- */
#touch {
  position: fixed;
  inset: 0;
  z-index: 4;
  display: none;
  touch-action: none;
}
#touch.show {
  display: block;
}
.tz-hint {
  position: absolute;
  top: 50%;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.18);
  pointer-events: none;
}
.tz-hint.left {
  left: max(18px, env(safe-area-inset-left));
}
.tz-hint.right {
  right: max(18px, env(safe-area-inset-right));
}
#touch button {
  position: absolute;
  bottom: max(76px, calc(env(safe-area-inset-bottom) + 64px));
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.35);
  color: rgba(255, 255, 255, 0.85);
  font: 700 13px/1 inherit;
  font-family: inherit;
  letter-spacing: 0.08em;
  touch-action: none;
}
#touch button:active {
  background: rgba(255, 255, 255, 0.15);
}
#tb-jump {
  right: max(18px, env(safe-area-inset-right));
}
#tb-dash {
  left: max(18px, env(safe-area-inset-left));
}
#touch.classic button {
  display: none;
}
#touch button.cooling {
  opacity: 0.35;
}
body.touch #hud-abilities .ab:not(#ab-shield) {
  display: none;
}

#fps {
  position: fixed;
  left: 8px;
  bottom: 6px;
  font: 12px ui-monospace, monospace;
  color: rgba(255, 255, 255, 0.6);
  z-index: 20;
  pointer-events: none;
}
#err {
  z-index: 40;
  background: var(--bg);
}

@media (max-width: 480px) {
  #hud-best {
    visibility: hidden;
  }
  #hud-sub {
    font-size: 10px;
    letter-spacing: 0.1em;
  }
}
@media (max-width: 640px) {
  .mode {
    width: 44vw;
    max-width: 170px;
  }
  #hud-score {
    transform: scale(0.8);
    transform-origin: top center;
  }
  #hud-best,
  #hud-gems {
    min-width: 80px;
    font-size: 11px;
  }
  #hud-best b,
  #hud-gems b {
    font-size: 15px;
  }
  #hud-right {
    min-width: 80px;
    gap: 8px;
  }
  .btn.huge {
    font-size: 21px;
    padding: 13px 44px;
  }
  .panel {
    padding: 20px 16px;
    min-width: 0;
    width: 100%;
  }
  .help td:first-child {
    white-space: normal;
  }
  .ab .bar {
    width: 32px;
  }
}
@media (max-height: 520px) {
  .logo.big {
    font-size: 48px;
  }
  .tagline {
    margin: 6px 0 12px;
  }
  .mode-switch {
    margin-bottom: 10px;
  }
  .mode {
    padding: 7px 8px;
  }
  .stats {
    margin-top: 8px;
  }
  .row {
    margin-top: 6px;
  }
  .btn {
    padding: 9px 14px;
  }
  .btn.huge {
    padding: 10px 44px;
  }
  .score-big {
    font-size: 54px;
  }
  .grid2 {
    margin: 8px 0 10px;
  }
  #touch button {
    bottom: max(60px, calc(env(safe-area-inset-bottom) + 50px));
    width: 66px;
    height: 66px;
  }
}