/* Frontier Inference Margins — theme + layout
   Palette: dataviz reference instance (validated). Text never wears series color. */

:root {
  --surface-1: #fcfcfb;
  --page: #f9f9f7;
  --ink-1: #0b0b0b;
  --ink-2: #52514e;
  --ink-3: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11,11,11,0.10);
  --series-1: #2a78d6;  /* blue   */
  --series-2: #1baf7a;  /* aqua   */
  --series-3: #eda100;  /* yellow */
  --series-4: #008300;  /* green  */
  --series-5: #4a3aa7;  /* violet */
  --series-6: #e34948;  /* red    */
  --seq-250: #86b6ef;
  --seq-400: #3987e5;
  --seq-550: #1c5cab;
  --accent: #2a78d6;
  --good: #006300;
  --warn: #b25f00;
  --wash: rgba(42,120,214,0.10);
  --tile: #ffffff;
  --shadow: 0 1px 3px rgba(11,11,11,0.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --surface-1: #1a1a19;
    --page: #0d0d0d;
    --ink-1: #ffffff;
    --ink-2: #c3c2b7;
    --ink-3: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255,255,255,0.10);
    --series-1: #3987e5;
    --series-2: #199e70;
    --series-3: #c98500;
    --series-4: #008300;
    --series-5: #9085e9;
    --series-6: #e66767;
    --accent: #3987e5;
    --good: #0ca30c;
    --warn: #fab219;
    --wash: rgba(57,135,229,0.14);
    --tile: #201f1e;
    --shadow: 0 1px 3px rgba(0,0,0,0.4);
  }
}
:root[data-theme="light"] {
  --surface-1: #fcfcfb; --page: #f9f9f7; --ink-1: #0b0b0b; --ink-2: #52514e;
  --ink-3: #898781; --grid: #e1e0d9; --baseline: #c3c2b7; --border: rgba(11,11,11,0.10);
  --series-1: #2a78d6; --series-2: #1baf7a; --series-3: #eda100; --series-4: #008300;
  --series-5: #4a3aa7; --series-6: #e34948; --accent: #2a78d6; --good: #006300;
  --warn: #b25f00; --wash: rgba(42,120,214,0.10); --tile: #ffffff;
  --shadow: 0 1px 3px rgba(11,11,11,0.06);
}
:root[data-theme="dark"] {
  --surface-1: #1a1a19; --page: #0d0d0d; --ink-1: #ffffff; --ink-2: #c3c2b7;
  --ink-3: #898781; --grid: #2c2c2a; --baseline: #383835; --border: rgba(255,255,255,0.10);
  --series-1: #3987e5; --series-2: #199e70; --series-3: #c98500; --series-4: #008300;
  --series-5: #9085e9; --series-6: #e66767; --accent: #3987e5; --good: #0ca30c;
  --warn: #fab219; --wash: rgba(57,135,229,0.14); --tile: #201f1e;
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink-1);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}
.page { max-width: 1240px; margin: 0 auto; padding: 24px 20px 60px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Masthead */
.masthead-row { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
h1 { font-size: 28px; margin: 0 0 4px; letter-spacing: -0.02em; }
.subtitle { color: var(--ink-2); max-width: 900px; margin: 6px 0 18px; }
.masthead-actions { display: flex; gap: 8px; }
.ghost-btn {
  background: none; border: 1px solid var(--border); border-radius: 8px;
  color: var(--ink-2); padding: 5px 12px; font: inherit; font-size: 13px;
  cursor: pointer; white-space: nowrap;
}
.ghost-btn:hover { background: var(--wash); color: var(--ink-1); }

/* Preset bar */
.preset-bar {
  display: flex; align-items: end; gap: 14px; flex-wrap: wrap;
  padding: 12px 14px; background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 16px; box-shadow: var(--shadow);
}
.preset-group { display: flex; flex-direction: column; gap: 3px; }
.preset-group label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-3); }
.preset-bar select {
  font: inherit; font-size: 14px; color: var(--ink-1); background: var(--tile);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; min-width: 170px;
}
.preset-note { font-size: 12px; color: var(--ink-3); margin-left: auto; max-width: 340px; }

/* Hero tiles */
.hero-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 18px; }
.tile {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; box-shadow: var(--shadow);
}
.tile-hero { background: var(--wash); }
.tile-label { font-size: 12.5px; color: var(--ink-2); display: flex; align-items: center; gap: 5px; }
.tile-value { font-size: 34px; font-weight: 600; margin-top: 2px; letter-spacing: -0.02em; }
.tile-hero .tile-value { font-size: 48px; }
.tile-small { font-size: 20px; }
.tile-delta { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

/* Layout */
.layout { display: grid; grid-template-columns: 390px 1fr; gap: 18px; align-items: start; }
@media (max-width: 980px) { .layout { grid-template-columns: 1fr; } }

/* Controls */
.controls { display: flex; flex-direction: column; gap: 12px; }
.ctl-section {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); overflow: hidden;
}
.ctl-section > summary {
  cursor: pointer; padding: 11px 14px; font-weight: 600; font-size: 14px;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
  user-select: none;
}
.ctl-section > summary::-webkit-details-marker { display: none; }
.ctl-section > summary::after { content: "▾"; color: var(--ink-3); font-size: 12px; transition: transform .15s; }
.ctl-section:not([open]) > summary::after { transform: rotate(-90deg); }
.ctl-body { padding: 2px 14px 14px; display: flex; flex-direction: column; gap: 14px; }

.param { display: flex; flex-direction: column; gap: 4px; }
.param-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.param-name { font-size: 13px; color: var(--ink-2); display: flex; align-items: center; gap: 5px; }
.param-val { font-size: 13.5px; font-weight: 600; font-variant-numeric: tabular-nums; }
.param input[type="range"] { width: 100%; accent-color: var(--accent); margin: 0; height: 22px; }
.param select, .param input[type="text"], .param input[type="number"] {
  font: inherit; font-size: 13.5px; color: var(--ink-1); background: var(--tile);
  border: 1px solid var(--border); border-radius: 8px; padding: 5px 8px;
}
.ticks { position: relative; height: 26px; margin-top: -3px; }
.tick {
  position: absolute; transform: translateX(-50%); top: 0; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  background: none; border: none; padding: 0; font: inherit;
}
.tick i { display: block; width: 1px; height: 5px; background: var(--baseline); }
.tick span {
  font-size: 10px; color: var(--ink-3); white-space: nowrap; line-height: 1.15;
  max-width: 86px; overflow: hidden; text-overflow: ellipsis;
}
.tick:hover span { color: var(--accent); }
.tick.tk-alt { top: 13px; }
.tick.tk-alt i { display: none; }

.info {
  background: none; border: none; color: var(--ink-3); cursor: help; font-size: 12px;
  padding: 0 2px; line-height: 1;
}
.info:hover, .info:focus { color: var(--accent); }

/* Hardware blend rows */
.hw-row { display: grid; grid-template-columns: 118px 1fr 44px; gap: 8px; align-items: center; }
.hw-name { font-size: 13px; color: var(--ink-2); display: flex; align-items: center; gap: 5px; }
.hw-pct { font-size: 12.5px; font-weight: 600; text-align: right; font-variant-numeric: tabular-nums; }
.hw-meta { grid-column: 1 / -1; font-size: 11px; color: var(--ink-3); margin: -4px 0 2px; }

.radio-row { display: flex; gap: 6px; flex-wrap: wrap; }
.radio-row button {
  font: inherit; font-size: 12.5px; padding: 5px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--tile); color: var(--ink-2); cursor: pointer;
}
.radio-row button[aria-pressed="true"] { background: var(--wash); color: var(--ink-1); border-color: var(--accent); }

/* Charts */
.results { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.chart-card {
  margin: 0; background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 16px 10px; box-shadow: var(--shadow);
}
.chart-card figcaption { display: flex; flex-direction: column; gap: 1px; margin-bottom: 6px; }
.chart-title { font-weight: 600; font-size: 14.5px; }
.chart-sub { font-size: 12px; color: var(--ink-3); }
.chart { width: 100%; }
.chart svg { display: block; width: 100%; height: auto; }
.chart text { font-family: system-ui, -apple-system, "Segoe UI", sans-serif; }

/* Tooltip */
.tooltip {
  position: fixed; z-index: 50; max-width: 320px; pointer-events: none;
  background: var(--tile); color: var(--ink-1); border: 1px solid var(--border);
  border-radius: 10px; padding: 9px 11px; font-size: 12.5px; line-height: 1.45;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
}
.tooltip .tt-title { font-weight: 600; margin-bottom: 3px; }
.tooltip .tt-src { color: var(--ink-3); font-size: 11.5px; margin-top: 4px; }
.tooltip .tt-row { display: flex; justify-content: space-between; gap: 14px; }
.tooltip .tt-row b { font-variant-numeric: tabular-nums; }
.tt-key { display: inline-block; width: 12px; height: 3px; border-radius: 2px; margin-right: 6px; vertical-align: middle; }

/* Subscription card */
#sub-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; margin-bottom: 8px; }
@media (max-width: 700px) { #sub-controls { grid-template-columns: 1fr; } }

/* Report */
.report {
  margin-top: 34px; background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px clamp(18px, 4vw, 44px); box-shadow: var(--shadow);
}
.report h2 { font-size: 24px; margin: 8px 0 4px; letter-spacing: -0.01em; }
.report h3 { font-size: 18px; margin: 26px 0 6px; }
.report h4 { font-size: 15px; margin: 18px 0 4px; }
.report p, .report li { color: var(--ink-2); font-size: 14.5px; }
.report strong { color: var(--ink-1); }
.report .byline { color: var(--ink-3); font-size: 13px; margin-bottom: 14px; }
.report table {
  border-collapse: collapse; width: 100%; font-size: 13px; margin: 10px 0 16px;
  display: block; overflow-x: auto;
}
.report th, .report td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
.report th { color: var(--ink-3); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.report td { color: var(--ink-2); }
.report td b, .report td strong { color: var(--ink-1); }
.report blockquote {
  margin: 10px 0; padding: 8px 14px; border-left: 3px solid var(--accent);
  background: var(--wash); border-radius: 0 8px 8px 0; color: var(--ink-2); font-size: 14px;
}
.report code { background: var(--wash); border-radius: 4px; padding: 1px 5px; font-size: 13px; }
.report .toc { columns: 2; font-size: 13.5px; }
@media (max-width: 700px) { .report .toc { columns: 1; } }
.report .verdict {
  border: 1px solid var(--accent); background: var(--wash); border-radius: 10px;
  padding: 12px 16px; margin: 12px 0;
}
.report details { margin: 8px 0; }
.report details summary { cursor: pointer; color: var(--ink-1); font-weight: 600; font-size: 14px; }

.footer { margin-top: 22px; color: var(--ink-3); font-size: 12.5px; text-align: center; }