/* Star Defender — original vertical arcade shooter.
 *
 * The iframe keeps its own palette so light/dark can adapt without changing
 * the shared Shell tokens. All artwork is procedural or generated in-repo.
 */

:root {
  color-scheme: light;
  --sd-bg: #eaf0ff;
  --sd-bg-deep: #cdd9ff;
  --sd-surface: #fffdf7;
  --sd-surface-2: #e4e9ff;
  --sd-ink: #10152e;
  --sd-muted: #5c6688;
  --sd-line: #10152e;
  --sd-accent: #6c5ce7;
  --sd-accent-2: #ffb020;
  --sd-gold: #8a5a00;
  --sd-score: #5a4bd1;
  --sd-danger: #e5533d;
  --sd-mint: #22c9a0;
  --sd-shadow: #10152e;
  --sd-on-accent: #ffffff;
  --sd-on-gold: #141226;
  --sd-grid: 8px;
  --sd-font: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Segoe UI Mono",
    Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  color-scheme: dark;
  --sd-bg: #070a1e;
  --sd-bg-deep: #0f1638;
  --sd-surface: #151d45;
  --sd-surface-2: #20295a;
  --sd-ink: #f4f6ff;
  --sd-muted: #a7b0d8;
  --sd-line: #f4f6ff;
  --sd-accent: #8d7bff;
  --sd-accent-2: #ffd34e;
  --sd-gold: #ffd34e;
  --sd-score: #ffd34e;
  --sd-danger: #ff6b6b;
  --sd-mint: #2ee6b0;
  --sd-shadow: #03040d;
  --sd-on-accent: #141226;
  --sd-on-gold: #141226;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--sd-bg);
}

body {
  font-family: var(--sd-font);
  color: var(--sd-ink);
  font-size: 16px;
  line-height: 1.4;
  -webkit-font-smoothing: none;
  text-rendering: optimizeSpeed;
  touch-action: none;
  overscroll-behavior: none;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

.u-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#app {
  position: relative;
  isolation: isolate;
  width: 100%;
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  background: var(--sd-bg);
}

.sd-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: var(--sd-bg);
  background-image: url("./assets/star-defender-light.png");
  background-position: center;
  background-size: cover;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: pixelated;
  opacity: 0.55;
}

[data-theme="dark"] .sd-bg {
  background-image: url("./assets/star-defender-dark.png");
  opacity: 0.72;
}

#game-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: pixelated;
  outline: none;
  touch-action: none;
}

#game-canvas:focus-visible {
  outline: 3px solid var(--sd-accent-2);
  outline-offset: -3px;
}

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

.sd-hud {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 4px 8px;
  padding: calc(8px + env(safe-area-inset-top, 0px))
    calc(8px + env(safe-area-inset-right, 0px)) 0
    calc(8px + env(safe-area-inset-left, 0px));
  pointer-events: none;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sd-hud__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.sd-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 24px;
  padding: 3px 5px;
  border: 2px solid var(--sd-line);
  background: var(--sd-surface);
  box-shadow: 3px 3px 0 var(--sd-shadow);
  white-space: nowrap;
}

.sd-chip strong {
  color: var(--sd-accent);
  font-size: 13px;
}

.sd-chip--accent strong {
  color: var(--sd-score);
}

.sd-chip--danger strong {
  color: var(--sd-danger);
}

.sd-chip--seed {
  display: none;
}

.sd-chip--seed[data-visible="true"] {
  display: inline-flex;
}

.sd-icon-btn {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 3px solid var(--sd-line);
  border-radius: 0;
  background: var(--sd-surface);
  box-shadow: 4px 4px 0 var(--sd-shadow);
  pointer-events: auto;
}

.sd-icon-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 0 var(--sd-shadow);
}

.sd-icon-btn__bars {
  display: inline-grid;
  grid-template-columns: repeat(2, 6px);
  gap: 4px;
}

.sd-icon-btn__bars span {
  display: block;
  width: 6px;
  height: 16px;
  background: currentColor;
}

.sd-icon-btn[aria-pressed="true"] .sd-icon-btn__bars span {
  width: 6px;
  height: 12px;
  align-self: center;
}

.sd-icon-btn[aria-pressed="true"] .sd-icon-btn__bars span:first-child {
  clip-path: polygon(0 0, 100% 50%, 100% 50%, 0 100%);
}

/* Boss meter -------------------------------------------------------------- */

.sd-boss {
  position: absolute;
  top: calc(58px + env(safe-area-inset-top, 0px));
  right: 12%;
  left: 12%;
  z-index: 2;
  display: grid;
  gap: 3px;
  color: var(--sd-ink);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
  pointer-events: none;
}

.sd-boss[hidden] {
  display: none;
}

.sd-boss__track {
  height: 12px;
  border: 2px solid var(--sd-line);
  background: var(--sd-surface);
  box-shadow: 3px 3px 0 var(--sd-shadow);
}

.sd-boss__fill {
  width: 100%;
  height: 100%;
  background: var(--sd-danger);
  transition: width 120ms steps(4, end);
}

/* Start card -------------------------------------------------------------- */

.sd-start {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  padding: 24px;
  pointer-events: none;
}

.sd-start[hidden] {
  display: none;
}

.sd-start__card {
  width: min(86vw, 340px);
  padding: 18px;
  border: 3px solid var(--sd-line);
  background: var(--sd-surface);
  box-shadow: 6px 6px 0 var(--sd-accent);
  text-align: center;
  pointer-events: auto;
}

.sd-start__card h1 {
  margin: 0 0 6px;
  color: var(--sd-accent);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.sd-start__card p {
  margin: 0 0 8px;
  color: var(--sd-muted);
  font-size: 16px;
  line-height: 1.45;
}

.sd-start__card .sd-start__seed {
  color: var(--sd-accent);
}

.sd-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  padding: 8px 12px;
  border: 3px solid var(--sd-line);
  border-radius: 0;
  background: var(--sd-surface);
  box-shadow: 4px 4px 0 var(--sd-shadow);
  font-family: var(--sd-font);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sd-btn--primary {
  color: var(--sd-on-accent);
  background: var(--sd-accent);
}

.sd-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 0 var(--sd-shadow);
}

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

.sd-touch {
  position: absolute;
  right: calc(10px + env(safe-area-inset-right, 0px));
  bottom: calc(10px + env(safe-area-inset-bottom, 0px));
  z-index: 3;
  display: none;
  align-items: flex-end;
  gap: 8px;
  pointer-events: none;
}

.sd-touch__hint {
  position: absolute;
  bottom: calc(10px + env(safe-area-inset-bottom, 0px));
  left: calc(10px + env(safe-area-inset-left, 0px));
  z-index: 3;
  display: none;
  padding: 4px 8px;
  border: 2px dashed var(--sd-line);
  background: var(--sd-surface);
  color: var(--sd-muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
}

.sd-action {
  display: inline-grid;
  place-items: center;
  width: 56px;
  height: 56px;
  padding: 0;
  border: 3px solid var(--sd-line);
  border-radius: 0;
  color: var(--sd-on-accent);
  background: var(--sd-accent);
  box-shadow: 4px 4px 0 var(--sd-shadow);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  pointer-events: auto;
}

.sd-action--bomb {
  color: var(--sd-on-gold);
  background: var(--sd-accent-2);
}

.sd-action:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 0 var(--sd-shadow);
}

@media (max-width: 720px), (hover: none), (pointer: coarse),
  (orientation: landscape) and (max-height: 520px) {
  .sd-touch {
    display: flex;
  }

  .sd-touch__hint {
    display: block;
  }
}

#app[data-state="ready"] .sd-touch,
#app[data-state="ready"] .sd-touch__hint {
  display: none;
}

@media (max-width: 520px) {
  .sd-hud {
    flex-direction: column;
    align-items: stretch;
  }

  .sd-hud__group {
    justify-content: space-between;
  }

  .sd-boss {
    top: calc(104px + env(safe-area-inset-top, 0px));
    right: 8%;
    left: 8%;
  }
}

/* Reduced motion ---------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .sd-boss__fill {
    transition: none;
  }

  .sd-start__card,
  .sd-btn,
  .sd-action {
    transition: none;
  }
}

/* Very small screens: keep HUD and buttons usable without overflow. */
@media (max-width: 360px) {
  .sd-hud {
    font-size: 12px;
  }

  .sd-chip {
    padding: 2px 4px;
  }

  .sd-action {
    width: 52px;
    height: 52px;
  }
}