/* ============================================================
   PALETTE (placeholder — swap in real lemon palette here)
   ============================================================ */
:root {
  /* lemon palette — placeholders; replace when real palette lands */
  --lemon-rind:   #ffd400;   /* primary accent, brightest yellow */
  --lemon-flesh:  #fff9b1;   /* soft pale yellow for highlights */
  --lemon-pith:   #fff5d6;   /* near-white, off-yellow */
  --lemon-leaf:   #cbe04f;   /* yellow-green accent */
  --lemon-zest:   #ffaa00;   /* deeper amber */

  /* dark base */
  --bg:           #0c0c0e;
  --bg-2:         #14141a;
  --bg-3:         #1c1d24;
  --fg:           #ece6d6;
  --fg-dim:       #9c958a;
  --fg-mute:      #5e5a52;
  --rule:         #26252b;

  /* signal colors */
  --c-rate:       var(--lemon-rind);    /* claude trend */
  --c-rate-2:     #88a8ff;              /* openai trend */
  --c-defection:  #ff5b6c;
  --c-up:         #ff7a59;              /* delta worsening */
  --c-down:       #6ce389;              /* delta improving */

  /* spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 20px;
  --space-5: 32px;
  --space-6: 48px;

  /* type scale */
  --font-mono: "JetBrains Mono", "Berkeley Mono", "IBM Plex Mono", "SF Mono",
               "Menlo", "Consolas", monospace;
}

/* ============================================================
   RESET + BASE
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--lemon-rind); text-decoration: none; border-bottom: 1px solid currentColor; }
a:hover { color: var(--lemon-zest); }

strong { color: var(--lemon-flesh); font-weight: 600; }
em { color: var(--lemon-leaf); font-style: normal; text-decoration: underline; text-underline-offset: 3px; }

h1, h2, h3 { font-weight: 600; }

code {
  font-family: var(--font-mono);
  background: var(--bg-3);
  padding: 1px 4px;
  border-radius: 2px;
  font-size: 0.9em;
}

/* ============================================================
   STICKY BANNER
   ============================================================ */
.banner {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-2);
  border-bottom: 1px solid var(--rule);
  padding: var(--space-2) var(--space-4);
  display: flex;
  gap: var(--space-3);
  align-items: center;
  font-size: 12px;
  flex-wrap: wrap;
}
.banner-mark {
  background: var(--lemon-rind);
  color: var(--bg);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 3px;
  letter-spacing: 0.04em;
}
.banner-msg { color: var(--fg-dim); flex: 1; }
.banner-msg a { font-size: inherit; }

/* Staleness banner — shown only when data.json.generated_at age > 8h.
   Yellow at 8–24h ("data is Nh old"), red at 24h+ ("cron may be down"). */
#staleness-banner {
  position: sticky;
  top: 0;
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  font-size: 12px;
  font-weight: 600;
  text-align: center;
  letter-spacing: 0.02em;
}
#staleness-banner.stale-yellow {
  background: var(--lemon-zest);
  color: var(--bg);
}
#staleness-banner.stale-red {
  background: var(--c-defection);
  color: var(--fg);
}

/* ============================================================
   MASTHEAD
   ============================================================ */
.masthead {
  padding: var(--space-6) var(--space-4) var(--space-4);
  max-width: 1200px;
  margin: 0 auto;
}
.masthead h1 {
  font-size: clamp(28px, 8vw, 64px);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: var(--space-3);
}
.masthead h1 em {
  text-decoration: none;
  color: var(--lemon-rind);
  font-style: normal;
}
.tagline {
  color: var(--fg-dim);
  max-width: 60ch;
  margin-bottom: var(--space-3);
}
.meta {
  font-size: 12px;
  color: var(--fg-mute);
}

/* ============================================================
   VERDICT LINE — answers the H1's question concretely. Lives
   between masthead and controls, before the first chart.
   ============================================================ */
.verdict {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  font-size: 13px;
  color: var(--fg);
  letter-spacing: 0.01em;
}
.verdict-prefix {
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  margin-right: var(--space-2);
}
.verdict-fragment strong { color: var(--fg); font-weight: 700; }
.verdict-delta { font-size: 12px; color: var(--fg-dim); margin-left: 4px; }
.verdict-delta.up   { color: var(--c-up); }     /* louder than prior week */
.verdict-delta.down { color: var(--c-down); }   /* quieter than prior week */
.verdict-sep { color: var(--rule); margin: 0 var(--space-2); }

/* ============================================================
   CONTROLS
   ============================================================ */
.controls {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.toggle-group {
  display: inline-flex;
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
.toggle {
  background: transparent;
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 13px;
  padding: 8px 16px;
  min-height: 36px;
  border: none;
  cursor: pointer;
  border-right: 1px solid var(--rule);
}
.toggle:last-child { border-right: none; }
.toggle:hover { color: var(--fg); background: var(--bg-2); }
.toggle:focus-visible {
  outline: 2px solid var(--lemon-rind);
  outline-offset: 2px;
  position: relative;
  z-index: 1;
}
.toggle.active {
  background: var(--lemon-rind);
  color: var(--bg);
  font-weight: 600;
}
.controls-note {
  font-size: 11px;
  color: var(--fg-mute);
  flex: 1;
  text-align: right;
}

/* ============================================================
   DASHBOARD GRID
   ============================================================ */
.dashboard {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-4);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}
@media (max-width: 1024px) {
  .dashboard { grid-template-columns: 1fr; }
}

.model-panel {
  background: var(--bg-2);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: var(--space-4);
}
.model-panel[data-model="claude"]  { border-top: 3px solid var(--lemon-rind); }
.model-panel[data-model="openai"]  { border-top: 3px solid var(--c-rate-2); }

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
}
.panel-head h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
}
.panel-totals {
  font-size: 12px;
  color: var(--fg-mute);
}

/* ============================================================
   BIG NUMBER
   ============================================================ */
.big-number-block {
  text-align: center;
  padding: var(--space-4) 0 var(--space-5);
  border-bottom: 1px dashed var(--rule);
  margin-bottom: var(--space-4);
}
.big-number {
  font-size: clamp(72px, 10vw, 120px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--lemon-flesh);
}
.model-panel[data-model="openai"] .big-number {
  color: var(--c-rate-2);
}
.big-number-label {
  font-size: 12px;
  color: var(--fg-mute);
  margin-top: var(--space-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.by-source {
  margin-top: var(--space-2);
  font-size: 12px;
  color: var(--fg-mute);
  letter-spacing: 0.02em;
}
.by-source:empty { display: none; }

.delta {
  margin-top: var(--space-3);
  font-size: 14px;
  color: var(--fg-dim);
}
.delta.up    { color: var(--c-up); }
.delta.down  { color: var(--c-down); }
.delta-glyph { font-weight: 700; margin-right: 4px; }

.partial-week {
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--rule);
  font-size: 12px;
  color: var(--fg-mute);
}
.partial-week strong { color: var(--fg-dim); font-weight: 600; }
.partial-week[hidden] { display: none; }

/* ============================================================
   CHART BLOCK
   ============================================================ */
.chart-block { margin-bottom: var(--space-5); }
.chart-block:last-child { margin-bottom: 0; }
.chart-block h3 {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  margin-bottom: var(--space-2);
  letter-spacing: 0.02em;
}
.chart-sub {
  color: var(--fg-mute);
  font-weight: 400;
}

.chart {
  width: 100%;
  background: var(--bg);
  border-radius: 4px;
  position: relative;
}
.chart.trend       { height: 200px; }
.chart.defection   { height: 130px; }

/* SVG chart styling */
.chart svg { display: block; width: 100%; height: 100%; }
.chart .chart-empty,
.top-terms .terms-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--fg-mute);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.top-terms .terms-empty {
  height: auto;
  padding: var(--space-3) 0;
  border-bottom: none;
}
.chart .axis text {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--fg-mute);
}
.chart .axis line, .chart .axis path {
  stroke: var(--rule);
  shape-rendering: crispEdges;
}
.chart .release-line {
  stroke: var(--lemon-flesh);
  stroke-dasharray: 2 3;
  opacity: 0.5;
}
.chart .release-label {
  fill: var(--lemon-flesh);
  font-size: 9px;
  opacity: 0.7;
}

/* ============================================================
   TOP TERMS LIST
   ============================================================ */
.top-terms-block { margin-bottom: var(--space-5); }
.top-terms {
  list-style: none;
  font-size: 13px;
}
.top-terms li {
  padding: 4px 0;
  border-bottom: 1px dotted var(--rule);
}
.top-terms li:last-child { border-bottom: none; }

/* Plain row (no examples) flexes directly inside <li>;
   when examples exist we wrap in <details><summary>...row...</summary>...</details>.
   .has-examples is set in JS as an explicit fallback for browsers without :has(). */
.top-terms li:not(.has-examples) {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.top-terms .term-summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  cursor: pointer;
  list-style: none;
  outline: none;
}
.top-terms .term-summary::-webkit-details-marker { display: none; }
.top-terms .term-summary::marker { content: ""; }
.top-terms .term-summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  color: var(--fg-mute);
  font-size: 10px;
  transition: transform 0.12s;
}
.top-terms details[open] .term-summary::before { transform: rotate(90deg); }
@media (prefers-reduced-motion: reduce) {
  .top-terms .term-summary::before { transition: none; }
}
.top-terms .term-summary:hover { color: var(--lemon-flesh); }

.top-terms .term {
  color: var(--fg);
}
.top-terms .count {
  color: var(--fg-mute);
  font-variant-numeric: tabular-nums;
}
.top-terms .bar {
  flex: 1;
  height: 1px;
  margin: 0 var(--space-3);
  background: var(--rule);
  position: relative;
}
.top-terms .bar-fill {
  position: absolute;
  left: 0;
  top: -2px;
  height: 5px;
  background: var(--lemon-rind);
  border-radius: 1px;
  opacity: 0.4;
}
.model-panel[data-model="openai"] .top-terms .bar-fill {
  background: var(--c-rate-2);
}

/* Expanded examples */
.top-terms .term-examples {
  list-style: none;
  margin: 6px 0 6px 18px;
  padding: 0;
  font-size: 11px;
}
.top-terms .term-examples li {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 2px 0;
  border-bottom: none;
}
.top-terms .ex-kind {
  color: var(--fg-mute);
  min-width: 88px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.top-terms .ex-link {
  color: var(--fg-dim);
  border-bottom-color: transparent;
  font-variant-numeric: tabular-nums;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.top-terms .ex-link:hover {
  color: var(--lemon-rind);
  border-bottom-color: currentColor;
}

/* ============================================================
   METHODOLOGY
   ============================================================ */
.methodology {
  max-width: 800px;
  margin: var(--space-6) auto;
  padding: var(--space-4);
}
.methodology h2 {
  font-size: 28px;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
  border-bottom: 2px solid var(--lemon-rind);
  padding-bottom: var(--space-1);
  display: inline-block;
}
.methodology .lead {
  font-size: 16px;
  color: var(--fg);
  margin-bottom: var(--space-5);
  padding: var(--space-3);
  border-left: 3px solid var(--lemon-rind);
  background: var(--bg-2);
}
.caveat {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px dashed var(--rule);
}
.caveat:last-child { border-bottom: none; }
.caveat h3 {
  font-size: 14px;
  color: var(--lemon-flesh);
  margin-bottom: var(--space-2);
}
.caveat p {
  color: var(--fg-dim);
  max-width: 60ch;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--rule);
  padding: var(--space-4);
  text-align: center;
  color: var(--fg-mute);
  font-size: 11px;
  margin-top: var(--space-6);
}

/* ============================================================
   MOBILE TIGHTENING — phones (≤480px)
   The 1024px breakpoint above already collapses the dashboard to
   single column. This block tightens spacing and tames the large
   typography for narrow viewports so the H1/big-number don't
   overflow and section padding doesn't waste pixels.
   ============================================================ */
@media (max-width: 480px) {
  .masthead {
    padding: var(--space-4) var(--space-3) var(--space-3);
  }
  .masthead h1 {
    font-size: clamp(26px, 9vw, 36px);
  }
  .controls {
    padding: 0 var(--space-3) var(--space-3);
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  .controls-note {
    text-align: left;
    flex-basis: 100%;
  }
  .dashboard {
    padding: var(--space-3);
    gap: var(--space-4);
  }
  .model-panel {
    padding: var(--space-3);
  }
  .panel-head h2 {
    font-size: 18px;
  }
  .toggle {
    padding: 10px 18px;
    min-height: 44px;
  }
  .big-number {
    font-size: clamp(56px, 18vw, 96px);
  }
  .methodology {
    padding: var(--space-3);
    margin: var(--space-4) auto;
  }
  .methodology h2 {
    font-size: 22px;
  }
  .banner {
    padding: var(--space-2) var(--space-3);
  }
}