/* Time-of-day sky behind the hero tree. sky.js sets the custom properties. */

.sky {
  --sun-x: 50%;
  --sun-y: 50%;
  --sun-color: #fff3c4;
  --sun-size: 54px;
  --day: 0;
  --twilight: 0;
  --night: 0;
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

/* Warm horizon at dawn/dusk, a faint lift in daylight, and a halo around the sun */
.sky-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at var(--sun-x) var(--sun-y),
      color-mix(in srgb, var(--sun-color) calc(var(--day) * 14% + var(--twilight) * 22%), transparent),
      transparent 42%),
    linear-gradient(to top,
      color-mix(in srgb, #ff8a4c calc(var(--twilight) * 20%), transparent),
      color-mix(in srgb, #c45a7a calc(var(--twilight) * 8%), transparent) 30%,
      transparent 60%),
    linear-gradient(to bottom,
      color-mix(in srgb, #9cc4ff calc(var(--day) * 6%), transparent),
      transparent 70%);
  transition: background 1s linear;
}

.sun {
  position: absolute;
  left: var(--sun-x);
  top: var(--sun-y);
  width: var(--sun-size);
  height: var(--sun-size);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, #fffdf2 0%, var(--sun-color) 55%, color-mix(in srgb, var(--sun-color) 60%, transparent) 100%);
  box-shadow:
    0 0 40px 10px color-mix(in srgb, var(--sun-color) 45%, transparent),
    0 0 120px 40px color-mix(in srgb, var(--sun-color) 18%, transparent);
  opacity: calc((0.35 + var(--day) * 0.35 + var(--twilight) * 0.45) * var(--sun-visible, 1));
  transition: opacity 0.6s ease;
  animation: sun-breathe 6s ease-in-out infinite alternate;
}

@media (max-width: 699px) {
  .sun { width: calc(var(--sun-size) * 0.7); height: calc(var(--sun-size) * 0.7); }
  .moon { width: 32px; height: 32px; }
}

@keyframes sun-breathe {
  to { box-shadow:
    0 0 48px 14px color-mix(in srgb, var(--sun-color) 50%, transparent),
    0 0 140px 50px color-mix(in srgb, var(--sun-color) 20%, transparent); }
}

.moon {
  position: absolute;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
  opacity: calc(var(--night) * 0.85);
  filter: drop-shadow(0 0 18px rgba(220, 230, 255, 0.35));
}

.star {
  position: absolute;
  width: var(--s);
  height: var(--s);
  border-radius: 50%;
  background: #fff;
  opacity: calc(var(--night) * var(--o));
  animation: star-twinkle var(--tw) ease-in-out var(--dl) infinite alternate;
}

@keyframes star-twinkle {
  to { opacity: calc(var(--night) * var(--o) * 0.3); }
}

@media (prefers-reduced-motion: reduce) {
  .sun, .star { animation: none; }
}

/* ── Visitor controls: "Time & season" button and panel ── */
.sky-toggle {
  position: absolute;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-card) 80%, transparent);
  backdrop-filter: blur(8px);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.sky-toggle:hover,
.sky-toggle[aria-expanded="true"] {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
}

.sky-toggle svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
}

.sky-toggle:focus-visible,
.sky-panel :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sky-panel {
  position: absolute;
  right: 1.5rem;
  bottom: 4.5rem;
  z-index: 3;
  width: 300px;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-card) 92%, transparent);
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: left;
  transform-origin: bottom right;
  animation: sky-panel-in 0.18s ease;
}

.sky-panel[hidden] { display: none; }

@keyframes sky-panel-in {
  from { opacity: 0; transform: translateY(6px) scale(0.97); }
}

.sky-panel-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.4rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sky-panel-label output {
  color: var(--text);
  font-size: 0.8rem;
  letter-spacing: 0;
  text-transform: none;
  font-variant-numeric: tabular-nums;
}

.sky-panel input[type="range"] {
  width: 100%;
  margin: 0 0 0.25rem;
  accent-color: var(--accent);
}

.sky-panel-hours {
  display: flex;
  justify-content: space-between;
  font-size: 0.68rem;
  opacity: 0.7;
  margin-bottom: 1rem;
}

.sky-seasons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.3rem;
  margin-bottom: 0.9rem;
}

.sky-seasons button,
.sky-reset {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  padding: 0.4rem 0;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.sky-seasons button:hover { color: var(--text); }

.sky-seasons button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

.sky-reset {
  width: 100%;
  border-style: dashed;
}

.sky-reset:hover { color: var(--text); border-color: var(--accent); }
.sky-reset:disabled { opacity: 0.45; cursor: default; }
.sky-reset:disabled:hover { color: var(--text-muted); border-color: var(--border); }

@media (max-width: 600px) {
  .sky-toggle { right: 1rem; bottom: 1rem; }
  .sky-panel { right: 1rem; left: 1rem; bottom: 4rem; width: auto; }
}