:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface-1: #fcfcfb;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;   /* tokens sent */
  --series-2: #eb6834;   /* tokens saved */
  --good: #0ca30c;
  --good-text: #006300;
  --critical: #d03b3b;
  --accent: #2a78d6;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface-1: #1a1a19;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --series-2: #d95926;
    --good: #0ca30c;
    --good-text: #0ca30c;
    --critical: #d03b3b;
    --accent: #3987e5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface-1: #1a1a19;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --grid: #2c2c2a;
  --baseline: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --series-1: #3987e5;
  --series-2: #d95926;
  --good: #0ca30c;
  --good-text: #0ca30c;
  --critical: #d03b3b;
  --accent: #3987e5;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 1060px; margin: 0 auto; padding: 24px 16px 48px; }

header {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 20px; border-bottom: 1px solid var(--border);
  background: var(--surface-1);
}
.mark {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: var(--accent); color: #fff; font-weight: 700;
}
.brand h1 { font-size: 17px; margin: 0; line-height: 1.2; }
.brand p { margin: 0; font-size: 12.5px; color: var(--text-secondary); }
header .badge { margin-left: auto; }
.badge {
  font-size: 12.5px; padding: 3px 10px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--good-text); background: transparent;
}
.badge.bad { color: var(--critical); }

h2 { margin: 0; font-size: 21px; }
h3 { margin: 0 0 10px; font-size: 15.5px; }
.eyebrow {
  margin: 0 0 2px; font-size: 11px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-muted);
}
.note { font-size: 12.5px; color: var(--text-muted); margin: 8px 0 0; }
.figure-note { font-size: 12.5px; color: var(--text-secondary); font-weight: 400; }
.empty { color: var(--text-muted); font-size: 13.5px; text-align: center; padding: 24px 0; }

.bar { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin: 18px 0 14px; flex-wrap: wrap; }
.bar.slim { margin: 0 0 10px; align-items: baseline; }
.controls { display: flex; gap: 8px; align-items: center; }

button {
  font: inherit; font-size: 13.5px; border-radius: 8px; padding: 7px 14px;
  cursor: pointer; border: 1px solid var(--border);
  background: var(--surface-1); color: var(--text-primary);
}
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.ghost:hover, .segmented button:hover { background: color-mix(in oklab, var(--text-primary) 6%, var(--surface-1)); }
.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.segmented button { border: 0; border-radius: 0; padding: 6px 12px; color: var(--text-secondary); }
.segmented button.on { background: color-mix(in oklab, var(--text-primary) 9%, var(--surface-1)); color: var(--text-primary); font-weight: 600; }

.panel {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 18px; margin: 0 0 16px;
}
.login-card { max-width: 420px; margin: 8vh auto 0; background: var(--surface-1); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
label { display: block; font-size: 13px; color: var(--text-secondary); margin: 12px 0 4px; }
.row-label { display: flex; align-items: center; gap: 8px; }
input[type="text"], input[type="password"], input:not([type]), select, textarea {
  width: 100%; font: inherit; font-size: 14px; margin-top: 4px;
  padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--page); color: var(--text-primary);
}
textarea { resize: vertical; }
#login button.primary { margin-top: 16px; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 0 0 16px; }
.tile { background: var(--surface-1); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.tile strong { display: block; font-size: 26px; font-weight: 650; line-height: 1.15; }
.tile span { font-size: 12.5px; color: var(--text-secondary); }
.tile .delta-good { color: var(--good-text); font-weight: 600; }

figure.viz-root { margin: 0 0 16px; }
figure figcaption { margin-bottom: 10px; display: flex; flex-direction: column; gap: 1px; }
figure figcaption strong { font-size: 15.5px; }
#chart-wrap { position: relative; }
#chart { display: block; width: 100%; height: 240px; }
#chart text { font: 11.5px system-ui, -apple-system, "Segoe UI", sans-serif; fill: var(--text-muted); font-variant-numeric: tabular-nums; }
#chart .gridline { stroke: var(--grid); stroke-width: 1; }
#chart .axisline { stroke: var(--baseline); stroke-width: 1; }
#chart .sent { fill: var(--series-1); }
#chart .saved { fill: var(--series-2); }
#chart .hit { fill: transparent; }
#chart .hit:hover + g rect, #chart g.hover rect { filter: brightness(1.08); }
#tooltip {
  position: absolute; pointer-events: none; z-index: 2;
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px; font-size: 12.5px; box-shadow: 0 4px 14px rgba(0,0,0,0.18);
  color: var(--text-secondary); white-space: nowrap;
}
#tooltip strong { color: var(--text-primary); font-variant-numeric: tabular-nums; }
#tooltip .tt-row { display: flex; align-items: center; gap: 6px; }
.legend { display: flex; gap: 16px; align-items: center; margin-top: 10px; font-size: 12.5px; color: var(--text-secondary); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend .swatch, #tooltip .swatch { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.swatch.s1 { background: var(--series-1); }
.swatch.s2 { background: var(--series-2); }

.table-panel .scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--grid); white-space: nowrap; }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
th.num, td.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr:hover { background: color-mix(in oklab, var(--text-primary) 4%, transparent); }
td .pill { font-size: 11.5px; border: 1px solid var(--border); border-radius: 999px; padding: 1px 8px; color: var(--text-secondary); }
td .pill.ok { color: var(--good-text); }
td .pill.err { color: var(--critical); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; margin-bottom: 16px; }
.grid button.card { text-align: left; padding: 14px 16px; border-radius: 12px; display: block; }
.grid button.card strong { display: block; margin-bottom: 2px; }
.grid button.card span { font-size: 12.5px; color: var(--text-secondary); }

pre { background: var(--page); border: 1px solid var(--border); border-radius: 8px; padding: 10px; overflow-x: auto; font-size: 12.5px; }
#error { color: var(--critical); font-size: 13.5px; min-height: 1em; }
footer { text-align: center; color: var(--text-muted); font-size: 12.5px; padding: 18px 0 26px; border-top: 1px solid var(--border); }
details summary { cursor: pointer; font-weight: 600; font-size: 14px; }

/* Use-case breakdown: one row per kind of content the optimizer compressed. */
.use-cases { display: flex; flex-direction: column; gap: .55rem; padding: .25rem 0; }
.uc-row {
  display: grid;
  grid-template-columns: minmax(9rem, 14rem) 1fr auto auto;
  align-items: center;
  gap: .75rem;
}
.uc-name { color: var(--ink); font-size: .9rem; }
.uc-track { background: var(--track, rgba(127,127,127,.18)); border-radius: 999px; height: .55rem; overflow: hidden; }
.uc-fill { background: var(--s2, #3f8f74); height: 100%; border-radius: 999px; min-width: 2px; }
.uc-value { font-variant-numeric: tabular-nums; font-weight: 600; }
.uc-count { color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; }
@media (max-width: 560px) {
  .uc-row { grid-template-columns: 1fr auto; row-gap: .25rem; }
  .uc-track { grid-column: 1 / -1; }
}