/**
 * Meridian Chart — full-viewport boot gate (Atlas Signal)
 * Night Slate + Surveyor's Vermilion. Theme via html[data-theme].
 */

#spa-boot.meridian-chart {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  margin: 0;
  padding: 0;
  align-items: stretch;
  justify-content: stretch;
  /* Prefer boot FOUC vars so light mode never paints Night Slate first. */
  background: var(--boot-canvas, #14181b);
  color: var(--boot-ink, #e8e6e1);
  font-family: Inter, system-ui, sans-serif;
  overflow: hidden;
  --mc-canvas: var(--boot-canvas, #14181b);
  --mc-void: #0f1214;
  --mc-ink: #e8e6e1;
  --mc-muted: #8e8b84;
  --mc-grid: rgba(232, 230, 225, 0.07);
  --mc-vermilion: #c24e32;
  --mc-vermilion-soft: rgba(194, 78, 50, 0.22);
  --mc-keycap: #23292e;
  --mc-keycap-border: #6b747c;
  --mc-face: #1a1f23;
  --mc-frame: #c24e32;
  --mc-mark-ink: #c24e32;
}

html[data-theme="light"] #spa-boot.meridian-chart {
  background: var(--boot-canvas, #f1f0ec);
  color: var(--boot-ink, #1c1e22);
  --mc-canvas: var(--boot-canvas, #f1f0ec);
  --mc-void: #e8e7e2;
  --mc-ink: #1c1e22;
  --mc-muted: #6b7078;
  --mc-grid: rgba(28, 30, 34, 0.08);
  --mc-vermilion: #a8422a;
  --mc-vermilion-soft: rgba(168, 66, 42, 0.18);
  --mc-keycap: #ffffff;
  --mc-keycap-border: #c5c3bc;
  --mc-face: #ffffff;
  --mc-frame: #c24e32;
  --mc-mark-ink: #c24e32;
}

html.spa-booting #spa-boot.meridian-chart {
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  font-size: inherit;
}

.mc {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(ellipse 70% 55% at 50% 42%, var(--mc-vermilion-soft), transparent 62%),
    linear-gradient(180deg, var(--mc-void) 0%, var(--mc-canvas) 48%, var(--mc-void) 100%);
}

html[data-theme="light"] .mc {
  /* Stay on Survey Paper — never dip into Night Slate mid-gradient. */
  background:
    radial-gradient(ellipse 70% 55% at 50% 40%, var(--mc-vermilion-soft), transparent 58%),
    linear-gradient(180deg, #f7f6f3 0%, #f1f0ec 45%, #e8e7e2 100%);
}

.mc__grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.9;
}

.mc__grid line {
  stroke: var(--mc-grid);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.mc__grid .mc__meridian {
  stroke: var(--mc-vermilion);
  stroke-opacity: 0.28;
  stroke-dasharray: 4 10;
  stroke-dashoffset: 80;
  animation: mc-meridian-draw 2.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.mc__stage {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.75rem;
  padding: 1.5rem;
  max-width: min(28rem, 92vw);
  text-align: center;
}

.mc__compass {
  position: relative;
  width: 9.5rem;
  height: 9.5rem;
  display: grid;
  place-items: center;
}

.mc__bearing {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.mc__bearing-track {
  fill: none;
  stroke: var(--mc-grid);
  stroke-width: 2.5;
}

.mc__bearing-arc {
  fill: none;
  stroke: var(--mc-vermilion);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 276.46;
  stroke-dashoffset: 276.46;
  transition: stroke-dashoffset 180ms cubic-bezier(0.22, 1, 0.36, 1);
}

.mc__mark {
  position: relative;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 2px;
  background: var(--mc-face);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.35), 0 8px 28px rgba(15, 18, 20, 0.35);
  overflow: hidden;
}

.mc__mark-frame {
  position: absolute;
  inset: 4px;
  border: 2.5px solid var(--mc-frame);
  border-radius: 1px;
  pointer-events: none;
}

.mc__mark-fill {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 0%;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(194, 78, 50, 0.12) 40%,
    rgba(194, 78, 50, 0.28) 100%
  );
  transition: height 200ms cubic-bezier(0.22, 1, 0.36, 1);
}

.mc__mark-letters {
  position: absolute;
  left: 10px;
  bottom: 8px;
  display: flex;
  gap: 0;
  font-family: Inter, system-ui, sans-serif;
  font-weight: 800;
  font-size: 1.65rem;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--mc-mark-ink);
  opacity: 0.35;
  transition: opacity 220ms ease;
}

.mc__mark-dot {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mc-mark-ink);
  opacity: 0.35;
  transition: opacity 220ms ease, transform 220ms ease;
}

.mc.is-locking .mc__mark-letters,
.mc.is-locking .mc__mark-dot,
.mc[data-progress="100"] .mc__mark-letters,
.mc[data-progress="100"] .mc__mark-dot {
  opacity: 1;
}

.mc.is-locking .mc__mark-dot {
  transform: scale(1.15);
}

.mc.is-locking .mc__mark {
  box-shadow:
    0 0 0 1px rgba(194, 78, 50, 0.35),
    0 0 32px rgba(194, 78, 50, 0.35),
    0 8px 28px rgba(15, 18, 20, 0.35);
}

.mc__brand {
  margin: 0;
  font-family: "Clash Display", Inter, system-ui, sans-serif;
  font-weight: 700;
  font-size: clamp(1.35rem, 3.5vw, 1.75rem);
  letter-spacing: -0.02em;
  color: var(--mc-ink);
  line-height: 1.15;
}

.mc__brand span {
  color: var(--mc-vermilion);
  margin-left: 0.2em;
}

.mc__counter {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 2.25rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--mc-ink);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  min-width: 4ch;
}

.mc__counter-unit {
  font-size: 0.9rem;
  margin-left: 0.15rem;
  color: var(--mc-muted);
  font-weight: 400;
}

.mc__status {
  margin: 0;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mc-muted);
  min-height: 1.2em;
}

.mc__waypoints {
  display: flex;
  gap: 0.65rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.mc__wp {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mc-muted);
  opacity: 0.45;
  transition: color 160ms ease, opacity 160ms ease;
}

.mc__wp.is-active {
  color: var(--mc-vermilion);
  opacity: 1;
}

.mc__wp.is-done {
  color: var(--mc-ink);
  opacity: 0.85;
}

.mc__wp-sep {
  width: 1.25rem;
  height: 1px;
  background: var(--mc-grid);
}

.mc__stakes {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.25rem;
}

.mc__key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.35rem;
  height: 2.35rem;
  padding: 0 0.55rem;
  border-radius: 4px;
  border: 1px solid var(--mc-keycap-border);
  background: var(--mc-keycap);
  color: var(--mc-ink);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8rem;
  font-weight: 500;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.28);
  opacity: 0;
  transform: translateY(10px);
  animation: mc-key-in 520ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.mc__key--mod {
  animation-delay: 120ms;
}

.mc__key--k {
  animation-delay: 280ms;
  border-color: color-mix(in srgb, var(--mc-vermilion) 55%, var(--mc-keycap-border));
  color: var(--mc-vermilion);
}

.mc__plus {
  color: var(--mc-muted);
  font-size: 0.75rem;
  opacity: 0;
  animation: mc-key-in 420ms cubic-bezier(0.22, 1, 0.36, 1) 200ms forwards;
}

.mc__fail {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  max-width: 22rem;
  padding: 0 1rem;
}

.mc.is-failed .mc__compass,
.mc.is-failed .mc__counter,
.mc.is-failed .mc__status,
.mc.is-failed .mc__waypoints,
.mc.is-failed .mc__stakes {
  display: none;
}

.mc.is-failed .mc__fail {
  display: flex;
}

.mc__fail-msg {
  margin: 0;
  color: var(--mc-muted);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.mc__retry {
  appearance: none;
  border: 1px solid var(--mc-vermilion);
  background: transparent;
  color: var(--mc-vermilion);
  font-family: Inter, system-ui, sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: 4px;
  cursor: pointer;
}

.mc__retry:hover {
  background: var(--mc-vermilion-soft);
}

.mc__retry:focus-visible {
  outline: 2px solid var(--mc-vermilion);
  outline-offset: 3px;
}

/* Exit: overlay lifts via clip */
#spa-boot.meridian-chart.is-exiting {
  animation: mc-exit 720ms cubic-bezier(0.65, 0, 0.35, 1) forwards;
  pointer-events: none;
}

#spa-boot.meridian-chart.is-exiting .mc__stage {
  animation: mc-stage-out 480ms cubic-bezier(0.65, 0, 0.35, 1) forwards;
}

@keyframes mc-meridian-draw {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes mc-key-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes mc-exit {
  0% {
    clip-path: inset(0 0 0 0);
    opacity: 1;
  }
  55% {
    opacity: 1;
  }
  100% {
    clip-path: inset(0 0 100% 0);
    opacity: 0;
  }
}

@keyframes mc-stage-out {
  to {
    opacity: 0;
    transform: translateY(-12px) scale(0.98);
  }
}

@media (max-width: 420px) {
  .mc__compass {
    width: 8rem;
    height: 8rem;
  }

  .mc__mark {
    width: 3.75rem;
    height: 3.75rem;
  }

  .mc__mark-letters {
    font-size: 1.35rem;
    left: 8px;
    bottom: 6px;
  }

  .mc__counter {
    font-size: 1.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mc__grid .mc__meridian,
  .mc__key,
  .mc__plus,
  .mc__bearing-arc,
  .mc__mark-fill,
  .mc__mark-letters,
  .mc__mark-dot {
    animation: none !important;
    transition: none !important;
  }

  .mc__key,
  .mc__plus {
    opacity: 1;
    transform: none;
  }

  .mc__grid .mc__meridian {
    stroke-dashoffset: 0;
  }

  #spa-boot.meridian-chart.is-exiting,
  #spa-boot.meridian-chart.is-exiting .mc__stage {
    animation: none !important;
    opacity: 0;
  }
}