/* Shared look for every page: tokens, base type, page frame, site header and footer. */
:root {
  --bg: #f3f5f6;
  --surface: #fdfdfc;
  --ink: #0f1418;
  --ink-2: #4a535c;
  --muted: #7d8791;
  --line: #dfe3e6;
  --accent: #256abf;
  --accent-soft: #e3eefb;
  --zero: #e6e9ec;
  --hatch: #b4bcc4;
  --c0: #b7d3f6; --c1: #6da7ec; --c2: #3987e5; --c3: #256abf; --c4: #104281;
  /* Oil balance: crude (imported, domestic) and one colour per product, the same wherever it appears. */
  --s1: #2a78d6; --s3: #1baf7a; --flow: #9aa6b2; --link-op: .45;
  --d1: #0f7f58; --d2: #1baf7a; --d3: #5ccb9f; --d4: #9fe0c4;  /* domestic crude: ONGC, Oil India, contract blocks, condensate */
  --p-lpg: #eb6834; --p-petcoke: #4b5563; --p-diesel: #eda100; --p-petrol: #e87ba4; --p-jet: #008300; --p-naphtha: #4a3aa7; --p-other: #b3bcc6;
  --display: "Archivo", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --body: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1114; --surface: #161a1e; --ink: #f1f3f5; --ink-2: #b8c0c8; --muted: #7f8892;
    --line: #2a3036; --accent: #6da7ec; --accent-soft: #1b2a3c; --zero: #262b31; --hatch: #4a525b;
    --c0: #184f95; --c1: #256abf; --c2: #3987e5; --c3: #6da7ec; --c4: #b7d3f6;
    --s1: #3987e5; --s3: #199e70; --flow: #5d6873; --link-op: .62;
    --d1: #127552; --d2: #199e70; --d3: #3fc490; --d4: #8adbb8;
    --p-lpg: #d95926; --p-petcoke: #9aa3ad; --p-diesel: #c98500; --p-petrol: #d55181; --p-jet: #008300; --p-naphtha: #9085e9; --p-other: #5d6873;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1114; --surface: #161a1e; --ink: #f1f3f5; --ink-2: #b8c0c8; --muted: #7f8892;
  --line: #2a3036; --accent: #6da7ec; --accent-soft: #1b2a3c; --zero: #262b31; --hatch: #4a525b;
  --c0: #184f95; --c1: #256abf; --c2: #3987e5; --c3: #6da7ec; --c4: #b7d3f6;
  --s1: #3987e5; --s3: #199e70; --flow: #5d6873; --link-op: .62;
  --d1: #127552; --d2: #199e70; --d3: #3fc490; --d4: #8adbb8;
  --p-lpg: #d95926; --p-petcoke: #9aa3ad; --p-diesel: #c98500; --p-petrol: #d55181; --p-jet: #008300; --p-naphtha: #9085e9; --p-other: #5d6873;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { background: var(--bg); color: var(--ink); font-family: var(--body); font-size: 14px; line-height: 1.45; }
.page { max-width: 1240px; margin: 0 auto; padding-inline: 20px; padding-block: 24px 40px; display: flex; flex-direction: column; gap: 18px; }
@media (max-width: 600px) { .page { padding-inline: 16px; padding-block: 16px 32px; } }

header .eyebrow { margin: 0 0 4px; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
h1 { margin: 0; font-family: var(--display); font-stretch: 78%; font-weight: 800; font-size: clamp(28px, 4.2vw, 42px); line-height: 1.02; letter-spacing: -.01em; text-wrap: balance; }
header p.lede { margin: 8px 0 0; color: var(--ink-2); max-width: 68ch; }

footer { color: var(--muted); font-size: 12px; display: flex; flex-direction: column; gap: 4px; max-width: 90ch; }
footer a { color: var(--ink-2); }

html { background: var(--bg); }
body { margin: 0; }
[hidden] { display: none !important; }
a { color: var(--accent); }

.site-nav { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.site-nav .brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-family: var(--display); font-stretch: 85%; font-weight: 700; font-size: 16px; }
.site-nav .brand svg { width: 22px; height: 22px; flex: none; }
.site-nav .links { display: flex; gap: 4px; }
.site-nav .links a { color: var(--ink-2); text-decoration: none; font-weight: 600; font-size: 13px; padding: 6px 10px; border-radius: 6px; }
.site-nav .links a:hover { background: var(--accent-soft); color: var(--ink); }
.site-nav .links a[aria-current="page"] { color: var(--ink); background: var(--accent-soft); }
.site-nav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Embed mode (see embed.js): just the chart, a source line and a link back. */
html.embed .site-nav, html.embed .page > header, html.embed .page > footer { display: none; }
html.embed .page { padding: 12px 0; gap: 12px; }
.embedfoot { display: flex; justify-content: space-between; align-items: baseline; gap: 6px 16px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.embedfoot a { color: var(--accent); font-weight: 600; text-decoration: none; }
.embedfoot .brand-sm { font-family: var(--display); font-stretch: 85%; font-weight: 700; color: var(--ink-2); font-size: 13px; }
/* Static mode: a fixed 1200px layout for images, with nothing that only makes sense on hover. */
html.static body { width: 1200px; }
html.static .page { max-width: none; width: 1200px; padding-inline: 24px; }
html.static .tip, html.static .scrollhint, html.static .more { display: none !important; }