/* ui/Theme — design tokens, base layer, shared primitives, motion policy.
   Contract: ./Theme.spec.md
   Load this before any other block stylesheet. */

:root {
  /* Surfaces */
  --qc-space-0: #05040c;
  --qc-space-1: #0c0b1a;
  --qc-space-2: #17152f;
  --qc-glass: rgba(12, 11, 28, 0.66);
  --qc-line: rgba(170, 180, 255, 0.14);
  --qc-line-strong: rgba(170, 180, 255, 0.32);

  /* Text */
  --qc-text: #eceeff;
  --qc-text-dim: #a6abcf;
  --qc-text-faint: #7a7fa6;

  /* Accents and meaning */
  --qc-accent: #9282ff;
  --qc-accent-2: #5de4ff;
  --qc-danger: #ff5a5f;
  --qc-hull: #dff3ff;
  --qc-xp: #a98bff;

  /* Ship identities — one per ship id. Nine classes must be told apart at a
     glance, so each stays at least 3:1 against --qc-space-0, ΔE 25 from another
     identity and ΔE 15 from any paint. */
  --qc-ship-laser: #ff4f9a;
  --qc-ship-plasma: #4dffb8;
  --qc-ship-rocket: #ffa04d;
  --qc-ship-scatter: #b4f03a;
  --qc-ship-arc: #31c1ff;
  --qc-ship-graviton: #c86bff;
  --qc-ship-shuriken: #0fd8e0;
  --qc-ship-gatling: #8899b0;
  --qc-ship-tesla: #3f66ff;

  /* Card rarities — one per rarity id */
  --qc-rarity-common: #aab2c8;
  --qc-rarity-rare: #4da3ff;
  --qc-rarity-epic: #b86bff;
  --qc-rarity-legendary: #ffc53d;

  /* Ship paints — mastery variant hull and accent colours, one per paint key.
     Each stays at least 3:1 against --qc-space-0. */
  --qc-paint-crimson: #ff2d55;
  --qc-paint-solar: #ffe94f;
  --qc-paint-ember: #ff6a2b;
  --qc-paint-emerald: #23e87f;
  --qc-paint-ice: #a6f0ff;
  --qc-paint-chrome: #d6deeb;
  --qc-paint-void: #7b4bff;
  --qc-paint-magenta: #ff3de0;
  --qc-paint-gold: #f5c24c;
  --qc-paint-aurora: #78a6ff;

  /* Type */
  --qc-font-ui: "Inter", "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --qc-font-mono: ui-monospace, "Cascadia Mono", "SF Mono", "JetBrains Mono", Consolas, monospace;

  /* Shape and motion */
  --qc-radius: 12px;
  --qc-radius-sm: 6px;
  --qc-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --qc-dur-fast: 120ms;
  --qc-dur: 260ms;
}

/* ---------------------------------------------------------------- base --- */

.qc-root {
  color-scheme: dark;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  background-color: var(--qc-space-0);
  background-image:
    radial-gradient(ellipse 70% 55% at 78% 8%, rgba(146, 130, 255, 0.13), transparent 62%),
    radial-gradient(ellipse 55% 45% at 8% 96%, rgba(93, 228, 255, 0.07), transparent 60%);
  background-repeat: no-repeat;
  background-attachment: fixed; /* one glow per viewport, no tiling seam when content scrolls */
  color: var(--qc-text);
  font-family: var(--qc-font-ui);
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.qc-root :focus-visible {
  outline: 2px solid var(--qc-accent-2);
  outline-offset: 3px;
}

/* ----------------------------------------------------------- starfield --- */

/* Two tiled star layers drifting at different speeds give a cheap parallax.
   Each layer moves by exactly one tile so the loop is seamless. */
.qc-starfield {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.qc-starfield::before,
.qc-starfield::after {
  content: "";
  position: fixed;
  inset: -400px;
  z-index: -1;
  pointer-events: none;
}

.qc-starfield::before {
  background-image:
    radial-gradient(1px 1px at 23px 41px, rgba(255, 255, 255, 0.85), transparent 60%),
    radial-gradient(1px 1px at 131px 97px, rgba(255, 255, 255, 0.5), transparent 60%),
    radial-gradient(1.4px 1.4px at 187px 211px, rgba(200, 210, 255, 0.75), transparent 60%),
    radial-gradient(1px 1px at 71px 173px, rgba(255, 255, 255, 0.35), transparent 60%),
    radial-gradient(1px 1px at 229px 19px, rgba(255, 255, 255, 0.45), transparent 60%);
  background-size: 260px 260px;
  opacity: 0.55;
  animation: qc-drift-near 150s linear infinite;
}

.qc-starfield::after {
  background-image:
    radial-gradient(1.8px 1.8px at 60px 300px, rgba(190, 175, 255, 0.8), transparent 60%),
    radial-gradient(1.2px 1.2px at 330px 120px, rgba(160, 235, 255, 0.7), transparent 60%),
    radial-gradient(1px 1px at 210px 380px, rgba(255, 255, 255, 0.6), transparent 60%);
  background-size: 400px 400px;
  opacity: 0.45;
  animation: qc-drift-far 260s linear infinite;
}

@keyframes qc-drift-near {
  to { transform: translate3d(-260px, -260px, 0); }
}

@keyframes qc-drift-far {
  to { transform: translate3d(-400px, 0, 0); }
}

/* ---------------------------------------------------------- primitives --- */

.qc-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.qc-eyebrow {
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--qc-text-faint);
}

.qc-kbd {
  display: inline-grid;
  place-items: center;
  min-width: 1.75em;
  height: 1.75em;
  padding: 0 0.45em;
  font: 600 11px/1 var(--qc-font-mono);
  color: var(--qc-text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--qc-line-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
}

.qc-button {
  appearance: none;
  margin: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.qc-button:disabled {
  cursor: not-allowed;
}

.qc-button--primary {
  min-width: 280px;
  padding: 16px 36px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  text-transform: uppercase;
  color: var(--qc-space-0);
  background: linear-gradient(90deg, var(--qc-accent-2), var(--qc-accent));
  border-radius: 999px;
  box-shadow: 0 14px 40px -16px var(--qc-accent);
  transition:
    transform var(--qc-dur-fast) var(--qc-ease-out),
    box-shadow var(--qc-dur) var(--qc-ease-out),
    filter var(--qc-dur-fast);
}

.qc-button--primary:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 50px -14px var(--qc-accent);
  filter: brightness(1.08);
}

.qc-button--primary:not(:disabled):active {
  transform: translateY(1px);
}

.qc-button--primary:disabled {
  color: var(--qc-text-faint);
  background: var(--qc-space-2);
  box-shadow: none;
}

.qc-button--ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--qc-text-dim);
  border: 1px solid var(--qc-line-strong);
  border-radius: 999px;
  transition: color var(--qc-dur-fast), border-color var(--qc-dur-fast);
}

.qc-button--ghost:hover {
  color: var(--qc-text);
  border-color: var(--qc-text-faint);
}

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

@media (prefers-reduced-motion: reduce) {
  .qc-root,
  .qc-root::before,
  .qc-root::after,
  .qc-root *,
  .qc-root *::before,
  .qc-root *::after {
    animation-duration: 1ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
  }
}