/* Ether — spatial browser stylesheet.
   Themes: auto / light / dark / high-contrast.
   Reduced-motion honored.
   Focus rings meet WCAG AAA. */

:root {
  --ether-bg: #000814;
  --ether-fg: #f5f8ff;
  --ether-muted: #a8b6d1;
  --ether-accent: #4fa8ff;
  --ether-accent-2: #7f6bff;
  --ether-danger: #ff5e5b;
  --ether-panel: rgba(255, 255, 255, 0.04);
  --ether-panel-border: rgba(255, 255, 255, 0.12);
  --ether-radius: 12px;
  --ether-focus-ring: 3px solid #ffcc00;
  --ether-focus-outline-offset: 3px;
  --ether-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  --ether-perspective: 1200px;
  --ether-panel-fg: var(--ether-fg);
  --ether-toolbar-height: 56px;
  --ether-font-size: 16px;
}

@media (prefers-color-scheme: light) {
  :root {
    --ether-bg: #f5f8ff;
    --ether-fg: #0b1a2b;
    --ether-muted: #4a5b73;
    --ether-panel: rgba(11, 26, 43, 0.04);
    --ether-panel-border: rgba(11, 26, 43, 0.14);
    --ether-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  }
}

html[data-theme="high-contrast"], body.high-contrast {
  --ether-bg: #000000;
  --ether-fg: #ffffff;
  --ether-muted: #ffffff;
  --ether-accent: #ffff00;
  --ether-accent-2: #00ffff;
  --ether-panel: #000000;
  --ether-panel-border: #ffffff;
  --ether-shadow: none;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ether-bg);
  color: var(--ether-fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: var(--ether-font-size);
  line-height: 1.55;
  min-height: 100%;
  overscroll-behavior: none;
}

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

.skip-link {
  position: absolute;
  left: -1000px;
  top: 0;
  padding: 8px 12px;
  background: var(--ether-accent);
  color: #000;
  text-decoration: none;
  z-index: 10000;
}
.skip-link:focus { left: 8px; top: 8px; outline: var(--ether-focus-ring); }

:focus-visible {
  outline: var(--ether-focus-ring);
  outline-offset: var(--ether-focus-outline-offset);
  border-radius: 4px;
}

.ether-shell {
  min-height: 100vh;
  perspective: var(--ether-perspective);
  perspective-origin: 50% 32%;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  transform-style: preserve-3d;
}

.ether-banner {
  padding: 8px 16px 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.ether-banner .wordmark {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  color: var(--ether-accent);
}
.ether-banner .tagline {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ether-muted);
}

.ether-toolbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--ether-bg);
  border-bottom: 1px solid var(--ether-panel-border);
  min-height: var(--ether-toolbar-height);
}

.tb-btn {
  appearance: none;
  background: var(--ether-panel);
  color: var(--ether-fg);
  border: 1px solid var(--ether-panel-border);
  border-radius: 8px;
  padding: 8px 12px;
  min-height: 40px;
  min-width: 40px;
  font: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.tb-btn svg { width: 20px; height: 20px; display: block; }
.tb-btn:hover:not(:disabled) { background: rgba(79, 168, 255, 0.12); }
.tb-btn.primary { background: var(--ether-accent); color: #001427; border-color: transparent; }
.tb-btn.a11y { margin-left: auto; }

.url-form {
  flex: 1;
  display: flex;
  gap: 8px;
  min-width: 100px;
}
#url-input {
  flex: 1;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--ether-panel-border);
  background: var(--ether-panel);
  color: var(--ether-fg);
  font: inherit;
}

main {
  padding: 16px;
  transform-style: preserve-3d;
  outline: none;
}

.stage {
  transform-style: preserve-3d;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  min-height: 40vh;
}

.card {
  background: var(--ether-panel);
  border: 1px solid var(--ether-panel-border);
  border-radius: var(--ether-radius);
  padding: 16px;
  box-shadow: var(--ether-shadow);
  transform: translateZ(0);
  transition: transform 320ms ease, box-shadow 320ms ease;
  will-change: transform;
  color: var(--ether-fg);
}
.card:hover { transform: translateZ(20px); }
.card h2 { margin-top: 0; color: var(--ether-accent); }

.panel-front { transform-style: preserve-3d; }
.panel-flip {
  transform-style: preserve-3d;
  animation: cardflip 500ms ease both;
}
@keyframes cardflip {
  0% { transform: rotateY(-90deg); opacity: 0; }
  100% { transform: rotateY(0deg); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .card:hover { transform: none; }
}

.a11y-panel {
  position: fixed;
  right: 12px;
  top: calc(var(--ether-toolbar-height) + 40px);
  width: 320px;
  max-width: calc(100vw - 24px);
  background: var(--ether-bg);
  border: 1px solid var(--ether-panel-border);
  border-radius: var(--ether-radius);
  padding: 16px;
  box-shadow: var(--ether-shadow);
  z-index: 50;
}
.a11y-panel h2 { margin-top: 0; color: var(--ether-accent); }
.a11y-group { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.a11y-group button { min-height: 36px; padding: 6px 12px; }
.shortcuts { display: grid; grid-template-columns: minmax(120px, auto) 1fr; gap: 4px 12px; }
.shortcuts dt { font-weight: 700; color: var(--ether-accent); }
.shortcuts dd { margin: 0; }

.palette {
  position: fixed;
  left: 50%;
  top: 15%;
  transform: translateX(-50%);
  width: min(560px, calc(100vw - 24px));
  background: var(--ether-bg);
  border: 1px solid var(--ether-panel-border);
  border-radius: var(--ether-radius);
  padding: 12px;
  box-shadow: var(--ether-shadow);
  z-index: 100;
}
.palette input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--ether-panel-border);
  background: var(--ether-panel);
  color: var(--ether-fg);
  font: inherit;
}
.palette ul { list-style: none; margin: 8px 0 0; padding: 0; max-height: 320px; overflow: auto; }
.palette li {
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
}
.palette li[aria-selected="true"] { background: rgba(79, 168, 255, 0.18); }
.palette li:hover { background: rgba(79, 168, 255, 0.12); }

.builder {
  position: fixed;
  inset: 8px;
  background: var(--ether-bg);
  border: 1px solid var(--ether-panel-border);
  border-radius: var(--ether-radius);
  box-shadow: var(--ether-shadow);
  z-index: 90;
  display: flex;
  flex-direction: column;
}
.builder-head { display: flex; padding: 12px 16px; border-bottom: 1px solid var(--ether-panel-border); align-items: center; gap: 12px; }
.builder-head h2 { margin: 0; color: var(--ether-accent); font-size: 1rem; }
.builder-actions { margin-left: auto; display: flex; gap: 8px; }
.builder-actions button, .builder-actions select { min-height: 36px; padding: 6px 12px; }
.builder-body { display: grid; grid-template-columns: 220px 1fr; flex: 1; min-height: 0; }
.builder-palette { padding: 12px; border-right: 1px solid var(--ether-panel-border); overflow: auto; display: flex; flex-direction: column; gap: 8px; }
.builder-palette .w { padding: 10px; border: 1px solid var(--ether-panel-border); background: var(--ether-panel); color: var(--ether-fg); border-radius: 8px; cursor: grab; text-align: left; }
.builder-canvas { padding: 16px; overflow: auto; background: repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(255,255,255,0.02) 12px, rgba(255,255,255,0.02) 24px); }
.builder-canvas [data-widget] { position: relative; margin: 8px 0; padding: 8px; border: 1px dashed var(--ether-panel-border); border-radius: 8px; }
.builder-canvas [data-widget].selected { outline: 2px solid var(--ether-accent); }

.ether-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--ether-panel-border);
  color: var(--ether-muted);
  font-size: 0.85rem;
}

/* Font-size ladder */
body[data-font="xl"] { --ether-font-size: 20px; }
body[data-font="xxl"] { --ether-font-size: 24px; }
body[data-font="sm"] { --ether-font-size: 14px; }
body[data-font="xs"] { --ether-font-size: 12px; }

body.cursor-magnifier * { cursor: crosshair; }

.reader-article { max-width: 72ch; margin: 0 auto; }
.reader-article h1, .reader-article h2, .reader-article h3 { color: var(--ether-accent); }
.reader-article img { max-width: 100%; height: auto; }
.reader-article a { color: var(--ether-accent); }

/* Shadow-normalisation for hologram projection: brighten dark content */
body.real-world .reader-article { filter: contrast(1.1) brightness(1.1); }
body.real-world .stage { transform: rotateX(35deg) translateY(-10px); transform-origin: center bottom; }

/* Hologram scene container */
#hologram-scene { position: fixed; inset: 0; z-index: 5; pointer-events: none; }
body.real-world #hologram-scene { pointer-events: auto; }
#hologram-video { position: fixed; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 1; opacity: 0.85; }