.canvas-wrapper {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

#living-lattice-canvas {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0;
  pointer-events: auto;
  transition: opacity 0.6s ease;
}

#living-lattice-canvas.ready {
  opacity: 1;
}

.poster-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(calc(0.85 - 0.2 * var(--canvas-glow-shift)))
    brightness(calc(0.95 + 0.35 * var(--canvas-glow-shift)));
  pointer-events: none;
  transition: opacity 0.6s ease;
}

.poster-frame.hidden {
  opacity: 0;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 50%;
  transform: translate(-50%, -200%);
  background: var(--accent-color);
  color: #ffffff;
  padding: 0.65rem 1.1rem;
  border-radius: var(--layer-radius-pill);
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease;
  z-index: 5;
}

.skip-link:focus {
  transform: translate(-50%, 0);
  outline: none;
}

.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: clamp(1rem, 3vw, 1.5rem);
  border-radius: var(--layer-radius-lg);
  background: var(--card-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-color);
  text-decoration: none;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.primary-nav a {
  color: color-mix(in srgb, var(--text-color) 92%, #4a5c76);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--accent-color);
  border-color: var(--accent-color);
  outline: none;
}

main {
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
  display: grid;
  gap: clamp(2.5rem, 6vw, 3.75rem);
  position: relative;
  z-index: 1;
}

a.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--layer-radius-pill);
  background: var(--accent-color);
  color: white;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(45, 127, 249, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

a.cta:hover {
  transform: translateY(-2px);
  background: var(--accent-color-dark);
  box-shadow: 0 14px 30px rgba(45, 127, 249, 0.35);
}

a.cta:focus {
  outline: var(--layer-shadow-outline);
  outline-offset: 4px;
}

a.cta.secondary {
  background: transparent;
  color: var(--accent-color);
  border: 2px solid color-mix(in srgb, var(--accent-color) 75%, white 25%);
  box-shadow: none;
}

a.cta.secondary:hover {
  background: color-mix(in srgb, var(--accent-color) 12%, transparent 88%);
  color: var(--accent-color-dark);
  border-color: color-mix(in srgb, var(--accent-color-dark) 75%, white 25%);
  box-shadow: none;
}

a.cta.secondary:focus {
  background: color-mix(in srgb, var(--accent-color) 15%, transparent 85%);
  color: var(--accent-color-dark);
}

.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.95rem;
}

.motion-toggle {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--layer-radius-pill);
  border: 1px solid var(--control-border);
  background: var(--control-bg);
  color: var(--control-text);
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  z-index: 3;
}

.motion-toggle:hover,
.motion-toggle:focus-visible {
  background: color-mix(in srgb, var(--control-bg) 65%, color-mix(in srgb, var(--accent-color) 70%, white 30%) 35%);
  border-color: color-mix(in srgb, var(--control-border) 55%, var(--accent-color) 45%);
  transform: translateY(-1px);
  outline: none;
}

.lambda-control {
  position: fixed;
  left: 1.5rem;
  bottom: 1.5rem;
  display: inline-flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.7rem 1rem 0.9rem;
  border-radius: var(--layer-radius-md);
  background: var(--control-bg);
  border: 1px solid var(--control-border);
  color: var(--control-text);
  font-weight: 600;
  letter-spacing: 0.01em;
  z-index: 3;
  box-shadow: 0 18px 42px color-mix(in srgb, var(--shadow-color) 55%, transparent 45%);
  min-width: 200px;
}

.lambda-control label {
  font-size: 0.85rem;
  opacity: 0.9;
}

.lambda-control__slider {
  width: min(220px, 40vw);
  appearance: none;
  height: 4px;
  border-radius: var(--layer-radius-pill);
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--accent-color) 85%, white 15%) 0%,
    color-mix(in srgb, var(--accent-color) 85%, white 15%) var(--shift-amount),
    rgba(255, 255, 255, 0.45) var(--shift-amount),
    rgba(255, 255, 255, 0.2) 100%
  );
  outline: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

.lambda-control__slider:focus-visible {
  box-shadow: var(--layer-shadow-outline);
}

.lambda-control__slider::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent-color) 75%, white 25%);
  border: 2px solid color-mix(in srgb, white 70%, var(--accent-color) 30%);
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent-color) 45%, transparent 55%);
  transition: transform 0.2s ease;
}

.lambda-control__slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent-color) 75%, white 25%);
  border: 2px solid color-mix(in srgb, white 70%, var(--accent-color) 30%);
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent-color) 45%, transparent 55%);
  transition: transform 0.2s ease;
}

.lambda-control__slider::-webkit-slider-thumb:hover,
.lambda-control__slider::-moz-range-thumb:hover {
  transform: scale(1.05);
}

@media (max-width: 900px) {
  body {
    padding: clamp(1.25rem, 4vw, 2rem);
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .primary-nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .motion-toggle,
  .lambda-control {
    display: none;
  }

  .motion-toggle {
    right: 1rem;
    bottom: 1rem;
  }

  .lambda-control {
    left: 1rem;
    bottom: 1rem;
    width: clamp(160px, 60vw, 220px);
  }
}