/* Shared styles for the Open Focus exercise pages (orb / periphery / grip) */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #050614;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f3f4f6;
  --muted: #9ca3af;
  --dim: #6b7280;
  --gold: #d97706;
  --cyan: #06b6d4;
  --red: #ef4444;
  --font-h: 'Outfit', sans-serif;
  --font-b: 'Inter', sans-serif;
}

html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-b);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

header {
  padding: 0.9rem 1.4rem;
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
}
header a.back {
  color: var(--dim);
  font-size: 0.8rem;
  text-decoration: none;
  transition: color 0.2s ease;
}
header a.back:hover { color: var(--text); }
header h1 {
  font-family: var(--font-h);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}
header .kind { color: var(--dim); font-size: 0.75rem; }

.stage {
  position: relative;
  flex: 1;
  margin: 0 1.1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg);
}
canvas#ex-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  display: block;
}

/* HUD text layers */
.hud { position: absolute; inset: 0; pointer-events: none; }
#hint {
  position: absolute;
  top: 14px; left: 0; right: 0;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.42);
  letter-spacing: 0.03em;
  padding: 0 1rem;
}
#meta {
  position: absolute;
  top: 12px; right: 16px;
  font-size: 0.75rem;
  color: var(--dim);
  letter-spacing: 0.05em;
}
#status {
  position: absolute;
  bottom: 14px; left: 0; right: 0;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.65);
  padding: 0 1rem;
}

/* Overlays (start / complete) */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 6, 20, 0.72);
  backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s;
}
.overlay.visible { opacity: 1; visibility: visible; }
.overlay-inner {
  max-width: 460px;
  width: 90%;
  text-align: center;
  padding: 2.4rem 2rem;
  border-radius: 20px;
  background: rgba(10, 11, 30, 0.75);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.overlay-inner h2 {
  font-family: var(--font-h);
  font-weight: 600;
  font-size: 1.5rem;
}
.overlay-inner p {
  color: var(--muted);
  font-weight: 300;
  font-size: 0.92rem;
  line-height: 1.65;
}
.overlay-inner .note { font-size: 0.78rem; color: var(--dim); }

.btn {
  font-family: var(--font-b);
  font-size: 0.9rem;
  color: #fff;
  background: linear-gradient(135deg, rgba(217, 119, 6, 0.85), rgba(180, 90, 10, 0.85));
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(217, 119, 6, 0.25); }
.btn.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}
.btn.ghost:hover { color: #fff; border-color: rgba(255, 255, 255, 0.3); box-shadow: none; }
.btn-row { display: flex; gap: 0.7rem; }

@media (max-width: 700px) {
  header { padding: 0.7rem 1rem; }
  .stage { margin: 0 0.7rem 0.7rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01s !important; }
}