:root {
  color-scheme: light;
  --bg: #f5f7f8;
  --text: #1d2528;
  --muted: #69777c;
  --border: #dce4e2;
  --primary: #18675f;
  --primary-dark: #104b46;
  --bad: #b43b3b;
  --clock-bg: #ff7f45;
  --clock-text: #ffffff;
  --shadow: 0 18px 45px rgba(18, 35, 39, 0.09);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  text-align: left;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.clock-lock-screen {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: clamp(20px, 5vw, 72px);
  background: var(--clock-bg);
}

.clock-stage {
  width: min(90vw, 1370px);
}

.flip-clock {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(10px, 1.2vw, 18px);
  align-items: center;
}

.flip-card {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(210px, 35vw, 530px);
  border-radius: clamp(22px, 3vw, 48px);
  overflow: hidden;
  background: #080303;
  color: var(--clock-text);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.18);
  perspective: 900px;
}

.flip-card::after {
  content: "";
  position: absolute;
  z-index: 4;
  left: 0;
  right: 0;
  top: 50%;
  height: clamp(8px, 1.1vw, 14px);
  transform: translateY(-50%);
  background: var(--clock-bg);
}

.card-half {
  position: absolute;
  inset-inline: 0;
  height: 50%;
  background: #080303;
}

.card-top {
  top: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.card-bottom {
  bottom: 0;
}

.flip-value {
  position: relative;
  z-index: 2;
  transform: translateY(0.03em);
  color: var(--clock-text);
  font-size: clamp(12rem, 32vw, 34rem);
  font-weight: 950;
  line-height: 0.8;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.flip-card.is-flipping .card-top {
  transform-origin: bottom;
  animation: flipTop 520ms cubic-bezier(0.22, 0.75, 0.22, 1);
}

.flip-card.is-flipping .card-bottom {
  transform-origin: top;
  animation: flipBottom 520ms cubic-bezier(0.22, 0.75, 0.22, 1);
}

.clock-meridiem {
  position: absolute;
  z-index: 5;
  left: clamp(18px, 2vw, 30px);
  bottom: clamp(18px, 2vw, 30px);
  color: var(--clock-text);
  font-size: clamp(1.1rem, 2.2vw, 2rem);
  font-weight: 900;
  letter-spacing: 0;
}

.clock-settings {
  position: fixed;
  z-index: 12;
  top: 18px;
  right: 18px;
  display: grid;
  gap: 10px;
  justify-items: end;
}

.clock-settings-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 999px;
  color: var(--clock-text);
  background: rgba(0, 0, 0, 0.18);
  font-size: 1.05rem;
}

.clock-settings-panel {
  display: grid;
  gap: 10px;
  width: 190px;
  border: 1px solid rgba(255, 255, 255, 0.44);
  border-radius: 8px;
  padding: 12px;
  background: rgba(8, 3, 3, 0.72);
  color: #fff;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.18);
}

.clock-settings-panel label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  font-weight: 800;
}

.clock-settings-panel input {
  width: 42px;
  height: 30px;
  border: 0;
  border-radius: 6px;
  padding: 0;
  background: transparent;
}

.clock-float-panel {
  position: fixed;
  z-index: 14;
  right: clamp(18px, 4vw, 48px);
  bottom: clamp(18px, 4vw, 48px);
}

.control-panel {
  display: grid;
  gap: 16px;
  width: min(420px, 100%);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  background: #fff;
  box-shadow: var(--shadow);
}

.control-panel h2,
.control-panel p {
  margin: 0;
}

.control-panel label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-weight: 700;
}

.control-panel input {
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 12px;
}

.control-panel button,
.primary-button {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 13px;
  color: #fff;
  background: var(--primary);
  font-weight: 750;
}

.control-panel button:hover,
.primary-button:hover {
  background: var(--primary-dark);
}

.eyebrow {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.field-error {
  color: var(--bad);
}

@keyframes flipTop {
  0% {
    transform: rotateX(0deg);
  }
  100% {
    transform: rotateX(-82deg);
  }
}

@keyframes flipBottom {
  0% {
    transform: rotateX(82deg);
  }
  100% {
    transform: rotateX(0deg);
  }
}

@media (max-width: 760px) {
  .flip-clock {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flip-card {
    min-height: clamp(180px, 44vw, 280px);
  }

  .flip-value {
    font-size: clamp(9rem, 42vw, 18rem);
  }

  .clock-float-panel {
    inset: auto 14px 14px;
    width: auto;
  }
}