/* ------------------------------------------------------------------ *
 * Bending Sandbox — UI shell
 * The 3D view owns the whole viewport; everything here floats on top.
 * ------------------------------------------------------------------ */

:root {
  --ui-bg: rgba(10, 14, 20, 0.55);
  --ui-bg-solid: rgba(12, 16, 22, 0.92);
  --ui-border: rgba(255, 255, 255, 0.12);
  --ui-text: rgba(238, 245, 255, 0.92);
  --ui-text-dim: rgba(197, 214, 232, 0.6);
  --ui-accent: #7fd6ff;
  --ui-radius: 14px;
  --ui-shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  --ui-font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #05070a;
  color: var(--ui-text);
  font-family: var(--ui-font);
  -webkit-font-smoothing: antialiased;
}

#viewport {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: crosshair;
}

/* ------------------------------------------------------------------ *
 * Loading veil
 * ------------------------------------------------------------------ */

.loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: radial-gradient(120% 120% at 50% 30%, #16202c 0%, #05070a 70%);
  transition: opacity 0.7s ease, visibility 0.7s;
}

.loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__inner {
  text-align: center;
  width: min(420px, 80vw);
}

.loader__title {
  margin: 22px 0 18px;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.loader__sigil {
  display: flex;
  justify-content: center;
  gap: 14px;
}

.sigil {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  animation: sigil-pulse 1.8s ease-in-out infinite;
}

.sigil--a {
  background: #1d5f8f;
}
.sigil--b {
  background: #3fb4ff;
  animation-delay: 0.15s;
}
.sigil--c {
  background: #9fe0ff;
  animation-delay: 0.3s;
}
.sigil--d {
  background: #ecfbff;
  animation-delay: 0.45s;
}

@keyframes sigil-pulse {
  0%,
  100% {
    transform: scale(0.7);
    opacity: 0.35;
  }
  50% {
    transform: scale(1.15);
    opacity: 1;
  }
}

.loader__bar {
  height: 3px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.loader__bar i {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 3px;
  background: linear-gradient(90deg, #1d5f8f, #3fb4ff, #ecfbff);
  transition: width 0.25s ease;
}

.loader__status {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ui-text-dim);
}

/* ------------------------------------------------------------------ *
 * HUD
 * ------------------------------------------------------------------ */

.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  font-size: 13px;
}

/* ------------------------------------------------------------------ *
 * Ability bar
 * ------------------------------------------------------------------ */

.hud__abilities {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  pointer-events: auto;
}

.ability-card {
  position: relative;
  width: 96px;
  padding: 12px 8px 10px;
  border-radius: var(--ui-radius);
  border: 1px solid var(--ui-border);
  background: var(--ui-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--ui-shadow);
  text-align: center;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease,
    box-shadow 0.18s ease;
  user-select: none;
}

.ability-card:hover {
  transform: translateY(-3px);
  background: rgba(20, 28, 38, 0.7);
}

.ability-card.is-active {
  border-color: var(--accent, var(--ui-accent));
  background: rgba(20, 28, 38, 0.82);
  box-shadow: 0 0 0 1px var(--accent, var(--ui-accent)) inset, 0 8px 28px rgba(0, 0, 0, 0.5),
    0 0 26px -6px var(--accent, var(--ui-accent));
}

/* Armed: the slot pulses until the shot is taken or cancelled. */
.hud__abilities.is-armed .ability-card.is-active {
  animation: ability-armed 1.05s ease-in-out infinite;
}

@keyframes ability-armed {
  0%,
  100% {
    box-shadow: 0 0 0 1px var(--accent, var(--ui-accent)) inset, 0 8px 28px rgba(0, 0, 0, 0.5),
      0 0 22px -8px var(--accent, var(--ui-accent));
  }
  50% {
    box-shadow: 0 0 0 2px var(--accent, var(--ui-accent)) inset, 0 8px 28px rgba(0, 0, 0, 0.5),
      0 0 34px -2px var(--accent, var(--ui-accent));
  }
}

/*
 * Cooldown sweep. A conic gradient driven by one custom property, so the frame
 * loop updates it with a single `setProperty` and never triggers layout.
 */
.ability-card__sweep {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: conic-gradient(
    from 0deg,
    rgba(5, 9, 14, 0.8) calc(var(--cooldown, 0) * 360deg),
    transparent 0
  );
  opacity: 0;
  transition: opacity 0.12s linear;
  pointer-events: none;
}

.ability-card.is-cooling .ability-card__sweep {
  opacity: 1;
}

.ability-card.is-cooling .ability-card__glyph,
.ability-card.is-cooling .ability-card__label {
  opacity: 0.45;
}

.ability-card__glyph {
  position: relative;
  color: var(--accent, var(--ui-accent));
}

.ability-card__glyph .glyph-svg {
  display: block;
  width: 34px;
  height: 34px;
  margin: 1px auto 0;
  filter: drop-shadow(0 0 6px var(--accent, var(--ui-accent)));
  transition: filter 0.18s ease, opacity 0.18s ease;
}

.ability-card.is-active .glyph-svg {
  filter: drop-shadow(0 0 11px var(--accent, var(--ui-accent)));
}

.ability-card__label {
  position: relative;
  margin-top: 7px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: opacity 0.18s ease;
}

.ability-card__key {
  position: absolute;
  top: 6px;
  right: 9px;
  z-index: 1;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ui-text-dim);
}

.hud__panel {
  position: absolute;
  padding: 12px 14px;
  border-radius: var(--ui-radius);
  border: 1px solid var(--ui-border);
  background: var(--ui-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--ui-shadow);
  line-height: 1.65;
}

.hud__help {
  left: 22px;
  bottom: 26px;
  max-width: 260px;
  color: var(--ui-text-dim);
  transition: opacity 0.3s ease;
}

.hud__help.is-hidden {
  opacity: 0;
}

.hud__help strong {
  color: var(--ui-text);
  font-weight: 600;
}

.hud__help kbd {
  display: inline-block;
  min-width: 18px;
  padding: 1px 5px;
  margin-right: 4px;
  border-radius: 5px;
  border: 1px solid var(--ui-border);
  background: rgba(255, 255, 255, 0.07);
  font: 11px/1.5 var(--ui-font);
  color: var(--ui-text);
  text-align: center;
}

.hud__stats {
  right: 22px;
  top: 22px;
  min-width: 132px;
  font-variant-numeric: tabular-nums;
  color: var(--ui-text-dim);
}

.hud__stats b {
  float: right;
  color: var(--ui-text);
  font-weight: 600;
}

.hud__title {
  left: 22px;
  top: 22px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 11px;
  font-weight: 600;
}

.hud__title span {
  display: block;
  margin-top: 2px;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ui-text-dim);
  text-transform: none;
}

.hud__toast {
  position: absolute;
  left: 50%;
  top: 76px;
  transform: translate(-50%, -12px);
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--ui-border);
  background: var(--ui-bg-solid);
  box-shadow: var(--ui-shadow);
  opacity: 0;
  transition: opacity 0.25s ease, transform 0.25s ease;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.hud__toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* Standing reminder that the clock is stopped but the editor is not. */
.hud__paused {
  position: absolute;
  left: 50%;
  top: 26px;
  transform: translate(-50%, -8px);
  padding: 5px 16px;
  border-radius: 999px;
  border: 1px solid rgba(127, 214, 255, 0.4);
  background: rgba(12, 22, 32, 0.86);
  color: var(--ui-accent);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.hud__paused.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.hud__help-note {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--ui-border);
  font-size: 11px;
  color: var(--ui-accent);
  opacity: 0.72;
}

/* ------------------------------------------------------------------ *
 * lil-gui theming
 * ------------------------------------------------------------------ */

.lil-gui.root {
  --background-color: rgba(12, 16, 22, 0.9);
  --widget-color: rgba(255, 255, 255, 0.1);
  --focus-color: rgba(127, 214, 255, 0.35);
  --hover-color: rgba(255, 255, 255, 0.16);
  --font-family: var(--ui-font);
  --font-size: 11px;
  --input-font-size: 11px;
  --title-height: 30px;
  --widget-height: 22px;
  --name-width: 46%;
  z-index: 40;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--ui-shadow);
  max-height: calc(100vh - 32px);
}

.lil-gui.root > .title {
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
}

.lil-gui.autoPlace {
  top: 16px;
  right: 16px;
}

@media (max-width: 760px) {
  .hud__help,
  .hud__stats {
    display: none;
  }
  .ability-card {
    width: 78px;
  }
}