.clock {
  --clock-size: 340px;
  --s: min(var(--clock-size), 86vw, 74vh);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  width: 100%;
}

.clock__dial {
  position: relative;
  flex: 0 0 auto;
  width: var(--s);
  height: var(--s);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 30%, var(--color-bg-elevated) 0%, var(--color-surface) 72%);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg), inset 0 0 0 1px var(--color-border-subtle);
  animation: clock-dial-in 0.7s var(--ease-out) both;
}
.clock__dial::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0) 46%);
  pointer-events: none;
}

.clock__ticks {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - var(--tick)), #000 calc(100% - var(--tick) + 1px));
  mask: radial-gradient(farthest-side, transparent calc(100% - var(--tick)), #000 calc(100% - var(--tick) + 1px));
}
.clock__ticks--min {
  inset: calc(var(--s) * 0.055);
  --tick: calc(var(--s) * 0.026);
  background: repeating-conic-gradient(from 0deg, var(--color-text-muted) 0 0.7deg, transparent 0.7deg 6deg);
  opacity: 0.5;
}
.clock__ticks--hour {
  inset: calc(var(--s) * 0.05);
  --tick: calc(var(--s) * 0.05);
  background: repeating-conic-gradient(from 0deg, var(--color-text) 0 2deg, transparent 2deg 30deg);
  opacity: 0.72;
}

.clock__num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: calc(var(--s) * 0.125);
  font-size: calc(var(--s) * 0.072);
  font-weight: var(--weight-semibold);
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-secondary);
  transform: rotate(var(--a));
  pointer-events: none;
}
.clock__num::before {
  content: attr(data-n);
  transform: rotate(calc(var(--a) * -1));
}

.clock__hand {
  position: absolute;
  left: 50%;
  bottom: 50%;
  border-radius: var(--radius-full);
  transform: rotate(0deg);
  transform-origin: 50% 100%;
  z-index: 2;
}
.clock__hand--hour {
  width: calc(var(--s) * 0.032);
  height: 25%;
  margin-left: calc(var(--s) * -0.016);
  background: var(--color-text);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.28);
}
.clock__hand--min {
  width: calc(var(--s) * 0.022);
  height: 36%;
  margin-left: calc(var(--s) * -0.011);
  background: var(--color-text);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.24);
}
.clock__hand--sec {
  width: calc(var(--s) * 0.011);
  height: 50%;
  bottom: 42%;
  margin-left: calc(var(--s) * -0.0055);
  transform-origin: 50% 84%;
  background: var(--color-accent);
  z-index: 3;
}
.clock__hand--sec::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: calc(var(--s) * 0.053);
  width: calc(var(--s) * 0.054);
  height: calc(var(--s) * 0.054);
  margin-left: calc(var(--s) * -0.027);
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.32;
}
.clock__pin {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(var(--s) * 0.044);
  height: calc(var(--s) * 0.044);
  margin: calc(var(--s) * -0.022) 0 0 calc(var(--s) * -0.022);
  border-radius: 50%;
  background: var(--color-accent);
  border: calc(var(--s) * 0.008) solid var(--color-surface);
  box-shadow: 0 1px 5px rgba(15, 23, 42, 0.35);
  z-index: 4;
}

.clock.is-booting .clock__hand { transition: transform 1.05s var(--ease-out) }
.clock.is-booting .clock__hand--min { transition-delay: 0.06s }
.clock.is-booting .clock__hand--sec { transition-delay: 0.12s }

.clock__readout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--s) * 0.02);
  text-align: center;
}
.clock__time {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: calc(var(--s) * 0.024);
  margin: 0;
  font-family: var(--font-mono);
  font-size: calc(var(--s) * 0.155);
  font-weight: var(--weight-bold);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-text);
}
.clock__ss {
  font-size: 0.56em;
  font-weight: var(--weight-semibold);
  color: var(--color-accent-strong);
}
.clock__ss.is-tick { animation: clock-tick 0.42s var(--ease-out) }
.clock__mer {
  font-size: 0.4em;
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
}
.clock__date {
  margin: 0;
  font-size: calc(var(--s) * 0.056);
  font-weight: var(--weight-medium);
  line-height: 1.25;
  color: var(--color-text-secondary);
}
.clock__zone {
  margin: 0;
  font-family: var(--font-mono);
  font-size: calc(var(--s) * 0.038);
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.clock__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: var(--space-5);
  width: 100%;
  max-width: 640px;
}
.clock__field { display: flex; flex-direction: column; gap: var(--space-2); min-width: 0 }
.clock__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  line-height: 1;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.clock__select {
  -webkit-appearance: none;
  appearance: none;
  min-width: 11rem;
  max-width: 14rem;
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  background-color: var(--color-surface);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 4.5 6 8.5 10 4.5' fill='none' stroke='%236a7280' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-default), box-shadow var(--duration-fast) var(--ease-default), background-color var(--duration-fast) var(--ease-default);
}
.clock__select:hover { border-color: var(--color-text-muted) }
.clock__select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}
.clock__seg {
  display: inline-flex;
  padding: 3px;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}
.clock__segbtn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1.2;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: color var(--duration-fast) var(--ease-default), background-color var(--duration-fast) var(--ease-default), box-shadow var(--duration-fast) var(--ease-default);
}
.clock__segbtn:hover { color: var(--color-text) }
.clock__segbtn.is-active {
  color: var(--color-accent-strong);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}
.clock__range {
  -webkit-appearance: none;
  appearance: none;
  width: clamp(8rem, 24vw, 12rem);
  height: 1.5rem;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.clock__range::-webkit-slider-runnable-track {
  height: 0.5rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent) 0 var(--range-fill, 50%), var(--color-border-subtle) var(--range-fill, 50%) 100%);
}
.clock__range::-moz-range-track {
  height: 0.5rem;
  border-radius: 999px;
  background: var(--color-border-subtle);
}
.clock__range::-moz-range-progress {
  height: 0.5rem;
  border-radius: 999px;
  background: var(--color-accent);
}
.clock__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 1.15rem;
  height: 1.15rem;
  margin-top: -0.325rem;
  border: 2px solid var(--color-surface);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.35);
  transition: transform var(--duration-fast) var(--ease-default);
}
.clock__range::-moz-range-thumb {
  width: 1.15rem;
  height: 1.15rem;
  border: 2px solid var(--color-surface);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.35);
}
.clock__range:hover::-webkit-slider-thumb { transform: scale(1.14) }
.clock__range:hover::-moz-range-thumb { transform: scale(1.14) }
.clock__range:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; border-radius: 999px }
.clock__fullscreen { flex: 0 0 auto }

.clock:fullscreen {
  --s: min(var(--clock-size), 88vw, 56vh);
  width: 100%;
  max-width: none;
  height: 100%;
  margin: 0;
  padding: var(--space-6);
  gap: var(--space-5);
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(circle at 50% 36%, var(--color-bg-elevated) 0%, var(--color-bg) 72%);
  animation: clock-fs-in 0.45s var(--ease-out);
}
.clock:fullscreen .clock__controls { max-width: 60rem }

@keyframes clock-dial-in {
  from { opacity: 0; transform: scale(0.94) }
  to { opacity: 1; transform: scale(1) }
}
@keyframes clock-fs-in {
  from { opacity: 0.35 }
  to { opacity: 1 }
}
@keyframes clock-tick {
  from { opacity: 0.1; transform: translateY(-0.1em) }
  to { opacity: 1; transform: translateY(0) }
}

@media (max-width: 640px) {
  .clock { gap: var(--space-5) }
  .clock__controls { gap: var(--space-4) }
  .clock__field--city { flex: 1 1 100% }
  .clock__select { min-width: 0; max-width: none; width: 100% }
  .clock__range { width: min(100%, 14rem) }
}