/* === EventStudyTools refresh — design tokens === */
:root {
  /* Base palette — keeping the site's existing blue DNA */
  --blue-600: #1F6FA0;         /* primary; darkened from #2B8BC7 for WCAG AA (4.5:1) on small text + buttons */
  --blue-700: #18567C;         /* darker, used for hover/active so links still deepen on hover */
  --blue-500: #4FA8DD;
  --blue-100: #E7F2FA;
  --blue-50:  #F3F8FC;
  --ink-900:  #0E2439;         /* deep navy for body text */
  --ink-700:  #2B3E54;
  --ink-500:  #5A6B7D;
  --ink-400:  #8695A6;
  --ink-300:  #B7C3CF;
  --ink-200:  #DDE4EC;
  --ink-100:  #EEF2F6;
  --paper:    #FBFAF7;         /* warm off-white */
  --paper-2:  #F5F2EB;
  --white:    #FFFFFF;
  --coral:    #E07A5F;         /* accent sampled from line-chart graphic */
  --gold:     #D4A64A;
  --green:    #4B8F6B;

  --accent: var(--blue-600);
  --bg: var(--paper);
  --fg: var(--ink-900);
  --muted: var(--ink-500);
  --line: var(--ink-200);
  --card: var(--white);

  /* Type */
  --sans: 'Inter Tight', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --serif: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Scale */
  --density: 1;
  --pad: calc(24px * var(--density));
  --gap: calc(32px * var(--density));
  --radius: 4px;
  --radius-lg: 10px;

  /* Shadow */
  --shadow-sm: 0 1px 0 rgba(14, 36, 57, 0.04), 0 1px 2px rgba(14, 36, 57, 0.04);
  --shadow-md: 0 2px 4px rgba(14, 36, 57, 0.05), 0 8px 24px rgba(14, 36, 57, 0.06);
}

[data-theme="dark"] {
  --bg: #0B1520;
  --paper: #0B1520;
  --paper-2: #0F1C2A;
  --fg: #E6ECF3;
  --ink-900: #E6ECF3;
  --ink-700: #C9D3DE;
  --ink-500: #8E9CAC;
  --ink-400: #6A7888;
  --ink-300: #4A5868;
  --ink-200: #1F2E3F;
  --ink-100: #162434;
  --white: #0F1C2A;
  --card: #0F1C2A;
  --line: #1F2E3F;
  --blue-100: #152A3D;
  --blue-50: #0F1C2A;
  --muted: var(--ink-500);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

body[data-serif="true"] h1,
body[data-serif="true"] h2,
body[data-serif="true"] .display,
body[data-serif="true"] .editorial {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.01em;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* Layout */
.page { max-width: 1320px; margin: 0 auto; padding: 0 40px; }
@media (max-width: 720px) { .page { padding: 0 20px; } }

/* Top nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; gap: 32px;
  height: 64px;
  max-width: 1320px; margin: 0 auto; padding: 0 40px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600; letter-spacing: -0.01em;
  font-size: 16px;
}
.brand-mark {
  width: 28px; height: 28px; border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.brand-mark img { width: 28px; height: 28px; display: block; }
/* Legacy SVG mark — kept for the footer's smaller variant */
.brand-mark svg { width: 16px; height: 16px; }
.brand strong { font-weight: 700; }
.brand em { font-style: normal; color: var(--blue-600); font-weight: 500; }

.nav-links { display: flex; gap: 2px; margin-left: auto; }
.nav-link {
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--ink-700);
  font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px;
  transition: background 120ms, color 120ms;
}
.nav-link:hover { background: var(--ink-100); color: var(--ink-900); }
.nav-link .caret { opacity: 0.4; font-size: 9px; }

.nav-cta {
  padding: 8px 14px;
  background: var(--blue-600);
  color: white;
  border-radius: 6px;
  font-size: 13px; font-weight: 500;
  border: none;
}
.nav-cta:hover { background: var(--blue-700); }

/* Eyebrows & labels */
.eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--blue-600);
}

/* Small caps used as a subtle homage to the original ALL CAPS */
.smallcaps {
  font-variant-caps: all-small-caps;
  letter-spacing: 0.04em;
  font-weight: 500;
  color: var(--ink-500);
  font-size: 13px;
}

/* Section */
.section { padding: 88px 0; border-top: 1px solid var(--line); }
.section:first-of-type { border-top: none; }
.section-head { display: flex; align-items: baseline; gap: 24px; flex-wrap: wrap; margin-bottom: 40px; }
.section-head h2 {
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.1;
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}
.section-head .lede { color: var(--muted); max-width: 520px; font-size: 15px; margin: 0; }

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--pad);
}

/* Chips */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px; font-weight: 500;
  background: var(--blue-100);
  color: var(--blue-700);
  border: 1px solid color-mix(in srgb, var(--blue-600) 18%, transparent);
  font-variant-numeric: tabular-nums;
}
.chip.mono { font-family: var(--mono); letter-spacing: 0; }
.chip.coral { background: color-mix(in srgb, var(--coral) 15%, var(--white)); color: color-mix(in srgb, var(--coral) 70%, var(--ink-900)); border-color: color-mix(in srgb, var(--coral) 30%, transparent); }

/* Data/mono */
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink-900);
  font-size: 13px; font-weight: 500;
  transition: all 120ms;
}
.btn:hover { border-color: var(--ink-400); }
.btn-primary {
  background: var(--blue-600); color: white; border-color: var(--blue-600);
}
.btn-primary:hover { background: var(--blue-700); border-color: var(--blue-700); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-700); }
.btn-ghost:hover { background: var(--ink-100); }

/* Scrollbars, focus */
:focus-visible { outline: 2px solid var(--blue-500); outline-offset: 2px; border-radius: 4px; }

/* Hairline separators */
.hairline { height: 1px; background: var(--line); border: 0; margin: 0; }