/* Mechanical Watch Simulator — drafting-table aesthetic */

:root {
  --ink: #1a1a1c;
  --paper: #f1ece2;
  --paper-deep: #e5dfd1;
  --hairline: rgba(26, 26, 28, 0.55);
  --hairline-soft: rgba(26, 26, 28, 0.18);
  --accent: #c14a2c;          /* restrained red: escapement, jewels, HUD highlights */
  --accent-soft: rgba(193, 74, 44, 0.18);
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --serif: "Times New Roman", Georgia, serif;
}

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

html,
body {
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  overflow: hidden;
  letter-spacing: 0.02em;
}

#stage {
  position: relative;
  width: 100vw;
  height: 100vh;
}

#viewport {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#viewport:active {
  cursor: grabbing;
}

/* HUD panels — hairline bordered readouts, monospace, uppercase */

.hud {
  position: absolute;
  padding: 14px 18px;
  border: 1px solid var(--hairline);
  background: rgba(241, 236, 226, 0.86);
  backdrop-filter: blur(2px);
  font-size: 11px;
  text-transform: uppercase;
  line-height: 1.35;
  letter-spacing: 0.08em;
  pointer-events: none;
  user-select: none;
  min-width: 220px;
}

.hud--tl {
  top: 24px;
  left: 24px;
}

.hud--tr {
  top: 24px;
  right: 24px;
  text-align: right;
  min-width: 0;
}

.hud--bl {
  bottom: 24px;
  left: 24px;
}

.hud--br {
  bottom: 24px;
  right: 24px;
  min-width: 0;
}

.hud--tc {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0;
  border: none;
  background: none;
  pointer-events: auto;
}

.hud__title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  margin-bottom: 8px;
  color: var(--accent);
}

.hud__rows {
  display: grid;
  gap: 4px;
}

.hud__rows--right {
  text-align: right;
}

.hud__row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: baseline;
}

.hud__rows--right .hud__row {
  flex-direction: row-reverse;
}

.hud__row dt {
  opacity: 0.6;
  font-size: 10px;
}

.hud__row dd {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.hud__unit {
  margin-left: 2px;
  opacity: 0.5;
  font-size: 9px;
}

.hud__hint {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  display: flex;
  gap: 6px;
  align-items: baseline;
}

.hud__hint span {
  border: 1px solid var(--hairline);
  padding: 1px 6px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.4);
  font-weight: 600;
}

.hud__hint em {
  font-style: normal;
  opacity: 0.7;
}

.hud__row dd.is-beat {
  color: var(--accent);
  transition: color 60ms;
}

/* Caliber tabs — top center */

.caliber-tabs {
  display: flex;
  gap: 0;
  list-style: none;
  border: 1px solid var(--hairline);
  background: rgba(241, 236, 226, 0.86);
}

.tab {
  appearance: none;
  background: transparent;
  border: none;
  border-right: 1px solid var(--hairline);
  padding: 9px 16px;
  font: inherit;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
  transition: background 120ms;
}

.tab:last-child {
  border-right: none;
}

.tab:hover {
  background: rgba(193, 74, 44, 0.08);
}

.tab.is-active {
  background: var(--ink);
  color: var(--paper);
}

/* Controls hint bottom-center */

.controls-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 14px;
  padding: 8px 18px;
  border: 1px solid var(--hairline-soft);
  background: rgba(241, 236, 226, 0.7);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.85;
  transition: opacity 800ms ease;
  pointer-events: none;
}

.controls-hint.is-faded {
  opacity: 0;
}

.controls-hint span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.controls-hint span::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}

/* Part tooltip */

.part-tooltip {
  position: absolute;
  padding: 8px 12px;
  border: 1px solid var(--hairline);
  background: rgba(241, 236, 226, 0.95);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  max-width: 280px;
  pointer-events: none;
  transform: translate(12px, -50%);
  z-index: 4;
}

.part-tooltip strong {
  display: block;
  color: var(--accent);
  margin-bottom: 3px;
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* Play toggle (reduced motion) */

.play-toggle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  border: 1px solid var(--hairline);
  background: rgba(241, 236, 226, 0.94);
  font: inherit;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(26, 26, 28, 0.18);
}

.play-toggle__icon {
  width: 0;
  height: 0;
  border-left: 10px solid var(--accent);
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
}

.play-toggle.is-running .play-toggle__icon {
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 8px solid var(--accent);
  border-bottom: 8px solid var(--accent);
  width: 12px;
  height: 0;
}

@media (max-width: 760px) {
  .hud {
    padding: 9px 11px;
    font-size: 9px;
    min-width: 150px;
  }
  .hud--tl,
  .hud--bl {
    top: auto;
    left: 14px;
    right: 14px;
  }
  .hud--tl {
    top: 14px;
  }
  .hud--bl {
    bottom: 84px;
  }
  .hud--tr,
  .hud--br {
    display: none;
  }
  .hud--tc {
    top: auto;
    bottom: 14px;
  }
  .tab {
    padding: 6px 9px;
    font-size: 9px;
  }
  .controls-hint {
    display: none;
  }
}