:root {
  color-scheme: light dark;
  --bg: #111111;
  --paper: #f7f3ea;
  --ink: #151515;
  --muted: #626262;
  --line: rgba(20, 20, 20, 0.16);
  --white-panel: #f5f0e4;
  --black-panel: #171717;
  --black-ink: #f4efe4;
  --accent: #1d6f64;
  --accent-bright: #65d8c8;
  --danger: #c7322f;
  --control: rgba(255, 255, 255, 0.88);
  --control-ink: #121212;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.05) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.05) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 255, 255, 0.05) 75%),
    var(--bg);
  background-position: 0 0, 0 16px, 16px -16px, -16px 0;
  background-size: 32px 32px;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app {
  min-height: 100svh;
}

.setup-screen {
  display: grid;
  align-content: center;
  gap: 28px;
  width: min(100% - 32px, 560px);
  min-height: 100svh;
  margin: 0 auto;
  padding: 32px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--paper);
}

.mark {
  width: 64px;
  aspect-ratio: 1;
  border: 3px solid var(--paper);
  background:
    linear-gradient(90deg, transparent 50%, var(--paper) 50%) 0 0 / 50% 50%,
    linear-gradient(90deg, var(--paper) 50%, transparent 50%) 0 50% / 50% 50%;
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.34);
}

.eyebrow {
  margin: 0 0 4px;
  color: rgba(247, 243, 234, 0.72);
  font-size: 0.86rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 10vw, 5.2rem);
  line-height: 0.92;
}

.settings {
  display: grid;
  gap: 18px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(247, 243, 234, 0.94);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
}

fieldset {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(100px, 150px);
  align-items: center;
  gap: 14px;
}

.field span,
.check-field span {
  font-weight: 720;
}

input,
select {
  width: 100%;
  min-height: 46px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
}

input:focus,
select:focus,
button:focus-visible {
  outline: 3px solid rgba(29, 111, 100, 0.35);
  outline-offset: 2px;
}

.check-field {
  display: flex;
  align-items: center;
  gap: 12px;
}

.check-field input {
  width: 22px;
  min-height: 22px;
  accent-color: var(--accent);
}

.start-button {
  min-height: 54px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-size: 1.08rem;
  font-weight: 800;
}

.clock-screen {
  position: fixed;
  inset: 0;
  display: none;
  grid-template-rows: 1fr 1fr;
  background: var(--bg);
  touch-action: manipulation;
  user-select: none;
}

.app[data-screen="clock"] .setup-screen {
  display: none;
}

.app[data-screen="clock"] .clock-screen {
  display: grid;
}

html[data-saved-game="true"] .app[data-screen="setup"] .setup-screen {
  display: none;
}

html[data-saved-game="true"] .app[data-screen="setup"] .clock-screen {
  display: grid;
}

.clock-screen[data-layout="side-by-side"] {
  grid-template-columns: 1fr 1fr;
  grid-template-rows: none;
}

.clock-side {
  position: relative;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: clamp(10px, 2vmin, 18px);
  min-width: 0;
  min-height: 0;
  border: 0;
  padding: clamp(28px, 8vmin, 72px);
  overflow: hidden;
  text-align: center;
  transition: box-shadow 160ms ease, filter 160ms ease, transform 160ms ease;
  -webkit-tap-highlight-color: transparent;
}

.clock-side::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 2px solid currentColor;
  border-radius: 8px;
  opacity: 0.09;
  pointer-events: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

.clock-side:active {
  transform: scale(0.995);
}

.black-side {
  --running-accent: var(--accent-bright);
  --running-glow: rgba(101, 216, 200, 0.28);
  background:
    radial-gradient(circle at 50% 18%, rgba(255, 255, 255, 0.08), transparent 30%),
    var(--black-panel);
  color: var(--black-ink);
}

.white-side {
  --running-accent: var(--accent);
  --running-glow: rgba(29, 111, 100, 0.2);
  background:
    radial-gradient(circle at 50% 84%, rgba(29, 111, 100, 0.11), transparent 30%),
    var(--white-panel);
  color: var(--ink);
}

.player-label {
  position: relative;
  font-size: clamp(1rem, 3vmin, 1.4rem);
  font-weight: 850;
  text-transform: uppercase;
}

.time {
  position: relative;
  display: block;
  min-width: min(12ch, 100%);
  color: inherit;
  font-size: clamp(4rem, 24vmin, 17rem);
  font-variant-numeric: tabular-nums;
  font-weight: 900;
  line-height: 0.86;
  white-space: nowrap;
}

.side-status {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.42em;
  min-height: 1.2em;
  color: currentColor;
  font-size: clamp(0.95rem, 3vmin, 1.35rem);
  font-weight: 750;
  opacity: 0.68;
}

.side-status::before {
  content: "";
  width: 0.55em;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--running-accent);
  box-shadow: 0 0 0 0 var(--running-glow);
  opacity: 0;
  transform: scale(0.78);
}

.clock-side.is-active {
  filter: saturate(1.08) contrast(1.04);
  box-shadow:
    inset 0 0 0 clamp(4px, 0.75vmin, 8px) var(--running-accent),
    inset 0 0 clamp(42px, 9vmin, 90px) var(--running-glow);
}

.clock-side.is-active::before {
  border-color: var(--running-accent);
  box-shadow: 0 0 clamp(16px, 5vmin, 52px) var(--running-glow);
  opacity: 0.82;
}

.clock-side.is-active .side-status {
  opacity: 1;
}

.clock-side.is-active .side-status::before {
  animation: running-pulse 900ms ease-in-out infinite;
  opacity: 1;
}

.clock-side.is-low .time {
  color: var(--danger);
}

.clock-side.is-flagged {
  background: var(--danger);
  color: #ffffff;
}

.clock-side.is-idle {
  filter: saturate(0.82);
}

@keyframes running-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 var(--running-glow);
    transform: scale(0.78);
  }

  50% {
    box-shadow: 0 0 0 0.45em rgba(101, 216, 200, 0);
    transform: scale(1);
  }
}

.clock-controls {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 3;
  display: flex;
  gap: 8px;
  max-width: calc(100% - 28px);
  padding: 8px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.46);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28);
  transform: translate(-50%, -50%);
  backdrop-filter: blur(12px);
}

.clock-screen[data-layout="side-by-side"] .clock-controls {
  top: auto;
  bottom: max(14px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
}

.clock-controls button {
  min-width: 74px;
  min-height: 40px;
  border: 0;
  border-radius: 6px;
  background: var(--control);
  color: var(--control-ink);
  font-size: 0.95rem;
  font-weight: 800;
}

.clock-controls button:disabled {
  cursor: default;
  opacity: 0.55;
}

@media (orientation: landscape) {
  .clock-screen[data-layout="auto"] {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: none;
  }

  .clock-screen[data-layout="auto"] .clock-controls {
    top: auto;
    bottom: max(14px, env(safe-area-inset-bottom));
    transform: translateX(-50%);
  }
}

@media (max-width: 520px) {
  .setup-screen {
    width: min(100% - 24px, 560px);
  }

  .settings {
    padding: 16px;
  }

  .field {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .clock-controls {
    gap: 6px;
  }

  .clock-controls button {
    min-width: 0;
    padding: 0 12px;
    font-size: 0.86rem;
  }
}

@media (max-height: 460px) {
  .clock-side {
    padding: 20px;
  }

  .time {
    font-size: clamp(3.2rem, 18vmin, 10rem);
  }

  .side-status {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .clock-side.is-active .side-status::before {
    animation: none;
    transform: scale(1);
  }
}