/* ============ TOKENS ============ */
:root {
  /* Surfaces */
  --bg-0: oklch(0.16 0.012 255);   /* page */
  --bg-1: oklch(0.19 0.014 255);   /* panel */
  --bg-2: oklch(0.22 0.016 255);   /* raised */
  --bg-3: oklch(0.26 0.018 255);   /* hover */

  /* Ink */
  --ink-0: oklch(0.97 0.005 255);  /* primary text */
  --ink-1: oklch(0.78 0.008 255);  /* secondary */
  --ink-2: oklch(0.58 0.010 255);  /* tertiary / labels */
  --ink-3: oklch(0.42 0.010 255);  /* muted */

  /* Hairlines */
  --line-0: oklch(0.30 0.014 255);
  --line-1: oklch(0.36 0.016 255);

  /* Accent — heat / velocity */
  --heat-0: oklch(0.78 0.19 55);   /* amber */
  --heat-1: oklch(0.68 0.21 35);   /* red-orange */
  --cool-0: oklch(0.72 0.14 230);  /* cool blue for contrast on plots */

  /* Semantic */
  --good: oklch(0.78 0.16 150);
  --warn: oklch(0.78 0.16 80);
  --bad:  oklch(0.68 0.21 25);

  /* Type */
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  /* Radii — analytics UIs use little-to-no rounding */
  --r-sm: 2px;
  --r-md: 4px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg-0);
  color: var(--ink-0);
  font-family: var(--sans);
  font-feature-settings: "ss01", "cv11", "tnum";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

/* Background grain + grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, oklch(0.30 0.014 255 / 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(0.30 0.014 255 / 0.14) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 75%);
  z-index: 0;
}

.mono { font-family: var(--mono); font-feature-settings: "tnum", "zero"; }
.tnum { font-variant-numeric: tabular-nums; }

/* Labels */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid var(--line-0);
  background: var(--bg-1);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-1);
  border-radius: var(--r-sm);
}

.chip--heat { border-color: color-mix(in oklch, var(--heat-0), transparent 50%); color: var(--heat-0); }
.chip--good { border-color: color-mix(in oklch, var(--good), transparent 50%); color: var(--good); }

/* Panels */
.panel {
  background: var(--bg-1);
  border: 1px solid var(--line-0);
  border-radius: var(--r-md);
  position: relative;
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-0);
}
.panel__title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-1);
}
.panel__meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-0);
  background: transparent;
  border: 1px solid var(--line-1);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: 120ms ease;
  text-decoration: none;
}
.btn:hover { background: var(--bg-2); border-color: var(--ink-2); }
.btn--primary {
  background: var(--ink-0);
  color: var(--bg-0);
  border-color: var(--ink-0);
}
.btn--primary:hover { background: var(--heat-0); border-color: var(--heat-0); color: var(--bg-0); }

/* Numbers */
.stat-num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: -0.02em;
}

/* Dividers */
.hr {
  height: 1px;
  background: var(--line-0);
  border: 0;
}

/* Links */
a { color: inherit; }

/* Section anchors */
section { scroll-margin-top: 52px; }

/* Selection */
::selection { background: var(--heat-0); color: var(--bg-0); }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb { background: var(--line-1); border-radius: 0; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }