/* ===== Tokens (dark chrome) ===== */
:root {
  color-scheme: dark;
  --bg: #0f1115;
  --surface: #16181d;
  --surface-2: #191c22;
  --border: #262a31;
  --text: #e8e8ea;
  --text-muted: #8a8f99;
  --accent: #e8e8ea;
  --radius-sm: 5px;
  --radius-md: 10px;
  --radius-pill: 999px;
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, 0.5);
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.45;
}

button { font: inherit; cursor: pointer; }

/* ===== Landing page ===== */
.index-page main {
  max-width: 420px;
  margin: 0 auto;
  padding: 12vh 24px 6vh;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.index-page h1 {
  font-weight: 600;
  font-size: 28px;
  margin: 0;
  letter-spacing: -0.01em;
}
.index-page .intro {
  color: var(--text-muted);
  margin: 0;
}
.index-page #status {
  color: var(--text-muted);
  font-size: 13px;
}
.index-page #picker { display: flex; flex-direction: column; gap: 14px; }
.index-page label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.index-page select,
.index-page input[type="number"] {
  width: 100%;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 10px;
  font: inherit;
}
.index-page button[type="submit"] {
  margin-top: 8px;
  background: var(--accent);
  color: var(--bg);
  border: 0;
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  font-weight: 600;
  align-self: flex-start;
}

/* ===== Poster page chrome ===== */
.poster-page { background: var(--bg); min-height: 100vh; }
.poster-page main {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 4vh 24px;
}
.poster-page .poster {
  width: min(100%, 70vh);
  height: auto;
  filter: drop-shadow(var(--shadow-lg));
}

/* Gear button */
#gear {
  position: fixed;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}
#gear svg { width: 20px; height: 20px; }
#gear:hover { color: var(--text); }

/* Settings dialog */
#settings {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius-md);
  padding: 18px;
  min-width: 320px;
  box-shadow: var(--shadow-md);
}
#settings::backdrop { background: rgba(0, 0, 0, 0.5); }
#settings h2 {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 600;
}
#settings .field-row { display: flex; gap: 10px; margin-bottom: 10px; }
#settings .field-row > div { flex: 1; }
#settings .field-row .year-field { flex: 0 0 90px; }
#settings label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}
#settings select,
#settings input[type="number"] {
  width: 100%;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 9px;
  font: inherit;
}
#settings menu {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  padding: 0;
  margin: 14px 0 0;
}
#settings menu button {
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  padding: 7px 14px;
  font-weight: 500;
}
#settings menu button#apply {
  background: var(--accent);
  color: var(--bg);
  border-color: transparent;
  font-weight: 600;
}

/* ===== Custom color picker (sits next to a swatch row) ===== */
.swatch-with-picker {
  display: flex;
  align-items: center;
  gap: 8px;
}
.swatch-with-picker .swatch-row { flex: 1; }
.color-picker {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  flex: 0 0 28px;
}
.color-picker::-webkit-color-swatch-wrapper { padding: 2px; }
.color-picker::-webkit-color-swatch { border: none; border-radius: 3px; }
.color-picker::-moz-color-swatch { border: none; border-radius: 3px; }

/* ===== Swatch row (shared by index + dialog) ===== */
.swatch-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  cursor: pointer;
  padding: 0;
  position: relative;
  transition: transform 80ms ease;
}
.swatch:hover { transform: scale(1.06); }
.swatch.active::after {
  content: '';
  position: absolute;
  inset: -4px;
  border: 1px solid var(--text);
  border-radius: 50%;
}

/* ===== SVG poster (palette-driven via custom properties) ===== */
.poster .paper-bg { fill: var(--paper); }
.poster .band { fill: var(--band); }
.poster .city {
  font: 600 28px/1 'Marcellus', 'Cormorant Garamond', Georgia, serif;
  letter-spacing: 0.06em;
  fill: var(--ink);
}
.poster .year {
  font: 500 3.5px 'Inter', ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  fill: var(--ink);
  opacity: 0.7;
}
.poster .month {
  font: 500 3px 'Inter', ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  fill: var(--ink);
  opacity: 0.6;
}
.poster .curve {
  fill: none;
  stroke: var(--ink);
  stroke-width: 0.6;
  stroke-linejoin: round;
  stroke-linecap: round;
}
/* Zigzag should hit each extremum with a sharp corner, not a rounded one.
   miterlimit=2 caps the spike that very acute angles would produce
   (`stroke-width × miterlimit` = 1.2 mm max), preventing the tip from
   stabbing into the HH:MM/height labels above and below the vertex. */
.poster .curve.zigzag {
  stroke-linejoin: miter;
  stroke-linecap: butt;
  stroke-miterlimit: 2;
}
.poster .rule {
  stroke: var(--ink);
  stroke-width: 0.3;
  opacity: 0.4;
}
.poster .attrib {
  font: 400 1.2px 'Inter', ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.06em;
  fill: var(--ink);
  opacity: 0.5;
}

/* ===== Side-panel layout for large screens =====
   On wide viewports the settings dialog becomes a persistent right-side
   panel. The gear toggle is hidden — the panel is always visible — and the
   poster shrinks left to leave room for it. Below 1024px the markup falls
   back to its original modal-dialog behaviour. */
@media (min-width: 1024px) {
  #gear { display: none; }

  /* `display: block` overrides the UA `dialog:not([open])` { display:none },
     keeping the panel visible whether or not it has been opened via JS.
     Explicit `left: auto` is needed because the UA stylesheet sets
     `left: 0; right: 0; margin: auto` on <dialog>, and with both edges
     pinned the browser resolves the over-constraint by ignoring `right`
     — which slides the panel to the left edge. Same reason for the
     explicit `height: 100vh` and `max-height: none`: the UA caps
     dialogs to `fit-content`. */
  #settings {
    display: block;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    width: 340px;
    max-width: 340px;
    min-width: 0;
    height: 100vh;
    max-height: none;
    margin: 0;
    padding: 24px 20px;
    border-radius: 0;
    border: none;
    border-left: 1px solid var(--border);
    box-shadow: none;
    overflow-y: auto;
  }
  #settings::backdrop { display: none; }
  /* Changes auto-apply on large screens, so neither Cancel nor Update is
     meaningful — hide the whole footer menu. */
  #settings menu { display: none; }

  /* Push the poster left to clear room for the side panel. */
  .poster-page main {
    padding-right: calc(340px + 24px);
  }
}

/* ===== Print ===== */
@media print {
  @page { size: A2 portrait; margin: 0; }
  html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background: white;
    overflow: hidden;
    line-height: 0;
  }
  .poster-page { min-height: 0; margin: 0; padding: 0; overflow: hidden; }
  .poster-page main {
    display: block;
    position: absolute;
    inset: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
  }
  .poster-page .poster {
    display: block;
    position: absolute;
    inset: 0;
    width: 100% !important;
    height: 100% !important;
    max-width: none;
    max-height: none;
    filter: none;
  }
  #gear, #settings { display: none !important; }
}

/* ===== Language switcher (FR / EN pills) ===== */
.lang-row {
  display: flex;
  gap: 6px;
}
.lang-pill {
  height: 28px;
  min-width: 40px;
  padding: 0 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font: 500 12px/1 'Inter', sans-serif;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 80ms ease, color 80ms ease;
}
.lang-pill:hover { border-color: var(--text); }
.lang-pill.active {
  background: var(--accent);
  color: var(--bg);
  border-color: transparent;
}

/* ===== Poster axes & extrema labels ===== */
.poster .meter-axis,
.poster .day-axis {
  stroke: var(--ink);
  stroke-width: 0.2;
  opacity: 0.45;
}
.poster .meter-tick,
.poster .day-tick {
  stroke: var(--ink);
  stroke-width: 0.2;
  opacity: 0.55;
}
.poster .axis-label {
  font: 400 1.2px 'Inter', ui-sans-serif, system-ui, sans-serif;
  fill: var(--ink);
  opacity: 0.7;
  letter-spacing: 0.04em;
}
.poster .extremum-label {
  font: 400 1.1px 'Inter', ui-sans-serif, system-ui, sans-serif;
  fill: var(--ink);
  opacity: 0.75;
  letter-spacing: 0.02em;
}
.poster .coef-bar { fill: var(--ink); }
.poster .coef-label {
  font: 400 1.1px 'Inter', ui-sans-serif, system-ui, sans-serif;
  fill: var(--paper);
  letter-spacing: 0.02em;
}

/* ===== Generic pill row (shape / axes / times) ===== */
.pill-row {
  display: flex;
  gap: 6px;
}
.pill-row .pill {
  height: 28px;
  min-width: 56px;
  padding: 0 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font: 500 12px/1 'Inter', sans-serif;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 80ms ease, color 80ms ease;
}
.pill-row .pill:hover { border-color: var(--text); }
.pill-row .pill.active {
  background: var(--accent);
  color: var(--bg);
  border-color: transparent;
}