/* ---------------------------------------------------------------
   Public Data Observatory — Fixing Board
   Palette: ink / paper / ledger-green / rust / dim-gold
----------------------------------------------------------------- */

:root {
  --ink: #0F1210;
  --ink-raised: #171B18;
  --paper: #EDE8DD;
  --paper-dim: #A8A398;
  --hairline: #2B302C;
  --gain: #3F7D5C;
  --loss: #A8503A;
  --gold: #B8944F;

  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  --radius: 3px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------------- Header ---------------- */

.board-header {
  padding: 3rem clamp(1.25rem, 4vw, 3rem) 1.5rem;
  border-bottom: 1px solid var(--hairline);
}

.board-header__mark {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.mark-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  display: inline-block;
}

.mark-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--paper-dim);
}

.board-header__title {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}

.board-header__sub {
  margin: 0 0 1rem;
  color: var(--paper-dim);
  font-size: 0.95rem;
  max-width: 40ch;
}

.board-header__meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--paper-dim);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.meta-divider { opacity: 0.4; }

.quality-status {
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
}
.quality-status[data-state="pass"] { color: var(--gain); border-color: var(--gain); }
.quality-status[data-state="warn"] { color: var(--gold); border-color: var(--gold); }
.quality-status[data-state="fail"] { color: var(--loss); border-color: var(--loss); }

/* ---------------- Board grid ---------------- */

main {
  flex: 1;
  padding: 2rem clamp(1.25rem, 4vw, 3rem) 3rem;
}

.board {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.flap-cell {
  background: var(--ink);
  padding: 1.4rem 1.3rem;
  cursor: pointer;
  transition: background 0.15s ease;
  position: relative;
  overflow: hidden;
}

.flap-cell:hover,
.flap-cell:focus-visible {
  background: var(--ink-raised);
  outline: none;
}

.flap-cell:focus-visible {
  box-shadow: inset 0 0 0 1px var(--gold);
}

.flap-cell__pair {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--paper-dim);
  margin-bottom: 0.6rem;
}

.flap-cell__rate {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.9rem;
  line-height: 1;
  display: block;
  margin-bottom: 0.55rem;

  /* split-flap animation: each new value drops in */
  animation: flap-in 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes flap-in {
  0% { opacity: 0; transform: translateY(-8px); filter: blur(2px); }
  60% { opacity: 1; }
  100% { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.flap-cell__delta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.flap-cell__delta[data-dir="up"] { color: var(--gain); }
.flap-cell__delta[data-dir="down"] { color: var(--loss); }
.flap-cell__delta[data-dir="flat"] { color: var(--paper-dim); }

.flap-cell__delta-arrow { font-size: 0.75rem; }

/* ---------------- Detail panel ---------------- */

.detail {
  margin-top: 2rem;
  border: 1px solid var(--hairline);
  background: var(--ink-raised);
  padding: 1.75rem clamp(1.25rem, 3vw, 2.25rem) 2rem;
}

.detail__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
}

.detail__head h2 {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  margin: 0;
  font-weight: 600;
}

.detail__close {
  background: none;
  border: 1px solid var(--hairline);
  color: var(--paper-dim);
  font-size: 1.1rem;
  width: 28px;
  height: 28px;
  border-radius: var(--radius);
  cursor: pointer;
  line-height: 1;
}
.detail__close:hover { color: var(--paper); border-color: var(--paper-dim); }

.detail__chart-wrap {
  width: 100%;
  overflow-x: auto;
}

#detail-chart {
  width: 100%;
  height: auto;
  display: block;
  font-family: var(--font-mono);
}

.detail__stats {
  display: flex;
  gap: 2rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--paper-dim);
}

.detail__stats strong {
  color: var(--paper);
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.15rem;
}

/* ---------------- Footer ---------------- */

.board-footer {
  border-top: 1px solid var(--hairline);
  padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
  font-size: 0.78rem;
  color: var(--paper-dim);
}

.board-footer p { margin: 0; }

/* ---------------- Chart elements (drawn by app.js) ---------------- */

.chart-line {
  fill: none;
  stroke: var(--gold);
  stroke-width: 2;
}

.chart-area {
  fill: var(--gold);
  opacity: 0.08;
}

.chart-axis text {
  fill: var(--paper-dim);
  font-size: 10px;
}

.chart-axis line,
.chart-axis path {
  stroke: var(--hairline);
}

.chart-dot {
  fill: var(--ink);
  stroke: var(--gold);
  stroke-width: 2;
}

/* ---------------- Responsive ---------------- */

@media (max-width: 480px) {
  .board { grid-template-columns: 1fr 1fr; }
  .flap-cell__rate { font-size: 1.5rem; }
}