/* ============================================================
   Munro AI — Foundations
   Brand sub-mark of The Munro Agency, focused on AI search /
   generative engine optimization (GEO) for B2B clients.
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:ital,wght@0,400;0,500;0,700;1,400&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  /* ---------- Brand palette (sourced from Figma) ---------- */
  --ink-900: rgb(9, 46, 55);          /* primary brand dark — "deep teal" */
  --ink-800: rgb(2, 88, 101);         /* secondary deep teal */
  --teal-500: rgb(50, 180, 152);      /* mint/teal accent dot */
  --teal-300: rgb(120, 210, 188);     /* soft mint */
  --lime-400: rgb(171, 239, 6);       /* electric lime — high-energy accent */
  --lavender-300: rgb(199, 181, 243); /* soft lavender — supporting accent */
  --cream-50: rgb(255, 250, 231);     /* warm cream — page surface */
  --paper: #ffffff;
  --black: #000000;

  /* ---------- Neutrals (derived) ---------- */
  --ink-700: #14535f;
  --ink-600: #2c6c78;
  --ink-500: #4f8590;
  --ink-400: #7ea4ac;
  --ink-300: #b6cbd0;
  --ink-200: #dde8eb;
  --ink-100: #eef4f6;
  --ink-50:  #f7fafb;

  /* ---------- Semantic surfaces ---------- */
  --bg: var(--cream-50);
  --bg-paper: var(--paper);
  --bg-dark: var(--ink-900);
  --bg-muted: var(--ink-100);

  /* ---------- Semantic foreground ---------- */
  --fg-1: var(--ink-900);             /* headlines / primary text */
  --fg-2: #2a4951;                    /* body */
  --fg-3: #5d7980;                    /* muted body */
  --fg-4: #95aab0;                    /* tertiary / captions */
  --fg-on-dark-1: var(--cream-50);
  --fg-on-dark-2: rgba(255, 250, 231, 0.72);
  --fg-on-dark-3: rgba(255, 250, 231, 0.5);

  /* ---------- Accents (semantic) ---------- */
  --accent: var(--teal-500);          /* the "dot" — primary brand accent */
  --accent-strong: var(--lime-400);   /* attention-grabbing CTA highlight */
  --accent-soft: var(--lavender-300); /* supporting tag/highlight */

  /* ---------- Borders & lines ---------- */
  --border-1: rgba(9, 46, 55, 0.12);
  --border-2: rgba(9, 46, 55, 0.22);
  --border-on-dark: rgba(255, 250, 231, 0.18);

  /* ---------- Typography families ---------- */
  --font-serif: "DM Serif Display", "Times New Roman", Georgia, serif;
  --font-sans:  "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* ---------- Typographic scale (rem-based, base 16) ---------- */
  --fs-display-xl: clamp(56px, 9vw, 128px); /* hero serif */
  --fs-display-l:  clamp(48px, 6vw, 88px);  /* section serif */
  --fs-display-m:  clamp(36px, 4vw, 56px);
  --fs-display-s:  clamp(28px, 3vw, 40px);
  --fs-h1: 40px;
  --fs-h2: 32px;
  --fs-h3: 24px;
  --fs-h4: 20px;
  --fs-body-lg: 20px;
  --fs-body: 18px;
  --fs-body-sm: 16px;
  --fs-caption: 14px;
  --fs-eyebrow: 13px;

  /* ---------- Line heights ---------- */
  --lh-display: 0.94;     /* tight serif headline */
  --lh-tight: 1.1;
  --lh-snug: 1.25;
  --lh-body: 1.4;          /* DM Sans body — figma spec */
  --lh-loose: 1.6;

  /* ---------- Letter spacing ---------- */
  --ls-display: -0.02em;
  --ls-tight: -0.01em;
  --ls-eyebrow: 0.14em;

  /* ---------- Spacing (4px base) ---------- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;
  --space-11: 160px;

  /* ---------- Radii ---------- */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --radius-circle: 50%;

  /* ---------- Shadows (restrained / editorial) ---------- */
  --shadow-1: 0 1px 2px rgba(9, 46, 55, 0.06), 0 1px 1px rgba(9, 46, 55, 0.04);
  --shadow-2: 0 4px 16px rgba(9, 46, 55, 0.08);
  --shadow-3: 0 14px 40px rgba(9, 46, 55, 0.14);
  --shadow-glow-teal: 0 0 0 6px rgba(50, 180, 152, 0.18);
  --shadow-glow-lime: 0 0 0 6px rgba(171, 239, 6, 0.22);

  /* ---------- Motion ---------- */
  --ease-standard: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-emphasis: cubic-bezier(0.16, 0.84, 0.32, 1);
  --dur-1: 120ms;
  --dur-2: 220ms;
  --dur-3: 360ms;
  --dur-4: 600ms;

  /* ---------- Layout ---------- */
  --max-w: 1240px;
  --gutter: clamp(20px, 4vw, 48px);
}

/* ============================================================
   Element defaults
   ============================================================ */
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg-1);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-feature-settings: "ss01", "kern";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Headings — DM Serif Display, tight, slight negative tracking */
h1, h2, h3, .display, .serif {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: var(--ls-display);
  line-height: var(--lh-display);
  color: var(--fg-1);
  text-wrap: balance;
}
h1 { font-size: var(--fs-display-l); margin: 0 0 var(--space-5); }
h2 { font-size: var(--fs-display-m); line-height: var(--lh-tight); margin: 0 0 var(--space-4); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-snug); margin: 0 0 var(--space-3); letter-spacing: var(--ls-tight); }
h4 { font-family: var(--font-sans); font-weight: 700; font-size: var(--fs-h4); line-height: var(--lh-snug); margin: 0 0 var(--space-2); }

p { margin: 0 0 var(--space-4); color: var(--fg-2); text-wrap: pretty; }
strong, b { font-weight: 700; color: var(--fg-1); }
em, i { font-style: italic; }

a {
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 1px solid var(--border-2);
  transition: color var(--dur-2) var(--ease-standard), border-color var(--dur-2) var(--ease-standard);
}
a:hover { color: var(--ink-800); border-color: var(--accent); }

code, pre, kbd, samp { font-family: var(--font-mono); font-size: 0.92em; }
code { background: var(--ink-100); padding: 2px 6px; border-radius: 4px; }

::selection { background: var(--lime-400); color: var(--ink-900); }

/* ============================================================
   Utility classes
   ============================================================ */
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--fg-3);
}
.serif-italic { font-family: var(--font-serif); font-style: italic; font-weight: 400; }
.dot {
  display: inline-block;
  width: 0.42em;
  height: 0.42em;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 0.04em;
  margin-left: 0.04em;
}
.muted { color: var(--fg-3); }
.on-dark { color: var(--fg-on-dark-1); }
.on-dark p, .on-dark .muted { color: var(--fg-on-dark-2); }