*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #151b2a 0%, #050612 55%, #020308 100%);
  color: #e5ecff;
  overflow: hidden;
}

.app {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: stretch;
  justify-content: center;
}

#starfield {
  position: absolute;
    cursor: none;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: transparent;
}

.control-panel {
  position: relative;
  z-index: 2;
  align-self: flex-end;
  margin: 1.5rem;
  padding: 1rem 1.2rem 1.1rem;
  max-width: 340px;
  width: 100%;
  border-radius: 14px;
  background: rgba(5, 7, 20, 0.88);
  border: 1px solid rgba(115, 142, 255, 0.4);
  box-shadow:
    0 18px 45px rgba(0, 0, 0, 0.8),
    0 0 40px rgba(93, 134, 255, 0.25);
  backdrop-filter: blur(18px);
}

.control-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.control-panel__title {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #c7d4ff;
}

.control-panel__group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.55rem;
}

.control-panel__group label {
  font-size: 0.8rem;
  color: #a8b7ff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.control-panel__value {
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  color: #dde6ff;
  opacity: 0.8;
}

.control-panel__hint {
  margin-top: 0.7rem;
  font-size: 0.72rem;
  color: #8593cf;
  opacity: 0.85;
}

.control-panel__key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.3rem;
  height: 1.1rem;
  margin: 0 0.1rem;
  padding: 0 0.28rem;
  border-radius: 4px;
  border: 1px solid rgba(160, 185, 255, 0.8);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #e0e6ff;
  background: linear-gradient(145deg, rgba(36, 48, 96, 0.9), rgba(13, 18, 41, 0.9));
  box-shadow:
    0 0 0 1px rgba(6, 12, 32, 0.9),
    0 0 8px rgba(122, 153, 255, 0.65);
}

.control-panel {
  transition:
    opacity 200ms ease-out,
    transform 220ms ease-out;
}

.control-panel--hidden {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 0.4rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #27356b, #151a33);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #ffffff, #7aa2ff);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    0 0 0 4px rgba(96, 129, 255, 0.45),
    0 0 18px rgba(134, 176, 255, 0.9);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #ffffff, #7aa2ff);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    0 0 0 4px rgba(96, 129, 255, 0.45),
    0 0 18px rgba(134, 176, 255, 0.9);
  cursor: pointer;
}

input[type="range"]::-moz-range-track {
  height: 0.4rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #27356b, #151a33);
}

select {
  width: 100%;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(124, 149, 255, 0.8);
  background: rgba(5, 8, 26, 0.96);
  color: #dde6ff;
  font-size: 0.78rem;
  outline: none;
}

select:focus-visible {
  border-color: #a3b6ff;
  box-shadow: 0 0 0 1px rgba(170, 192, 255, 0.8);
}

.hud-clock {
  position: absolute;
  z-index: 2;
  top: 1.5rem;
  right: 1.5rem;
  padding: 0.55rem 0.8rem 0.5rem;
  border-radius: 10px;
  border: 1px solid rgba(135, 216, 255, 0.55);
  background: radial-gradient(
      circle at top,
      rgba(17, 52, 104, 0.85),
      rgba(4, 10, 32, 0.95)
    );
  box-shadow:
    0 0 22px rgba(0, 212, 255, 0.55),
    0 0 2px rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(16px);
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  color: #e7fbff;
  text-shadow:
    0 0 8px rgba(134, 240, 255, 1),
    0 0 18px rgba(0, 204, 255, 0.95);
  letter-spacing: 0.08em;
  transform-origin: top right;
  transition:
    opacity 200ms ease-out,
    transform 220ms ease-out;
}

.hud-clock__time {
  font-size: 1.15rem;
  line-height: 1.1;
}

.hud-clock__date {
  margin-top: 0.15rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  opacity: 0.9;
}

.hud-clock--hidden {
  opacity: 0;
  transform: translateY(-10px) scale(0.97);
  pointer-events: none;
}

@media (max-width: 600px) {
  .control-panel {
    margin: 0.85rem;
    padding: 0.85rem 0.9rem;
    max-width: 100%;
  }

  .hud-clock {
    top: 1rem;
    right: 1rem;
    padding-inline: 0.7rem;
  }
}