/* =========================================================
   GMS Marketing Site - shared stylesheet
   Brand: Global Market Signals (parent) + SRS + Catalyst + Institute
   Tokens derived from gms-brand skill (v0.5)
   ========================================================= */

:root {
  /* Ground */
  --navy: #0E2A3D;
  --navy-deeper: #091F2E;
  --navy-soft: #163A52;
  --paper: #F7F9FA;
  --paper-alt: #EEF2F5;
  --ink: #0E2A3D;
  --ink-soft: #3E5160;
  --ink-mute: #6B7D8A;
  --line: #D8DFE4;
  --line-dark: #1B3C50;

  /* GMS parent */
  --aqua: #5AD9C9;
  --aqua-soft: #A9EAE1;
  --teal: #2DB8B3;
  --ocean: #1E6E8A;
  --sky: #6FB4D6;
  --deep: #0B3A5B;
  --amber: #F5A623;

  /* SRS */
  --mint: #45EBD8;
  --mint-dark: #1E8E89;
  --green: #3EE686;
  --green-dark: #1F8A54;

  /* Catalyst */
  --coral: #E9604B;
  --coral-dark: #C44A37;

  /* Scale */
  --radius: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --maxw: 1200px;
  --pad: clamp(1.25rem, 3vw, 2rem);

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur-fast: 140ms;
  --dur: 220ms;
  --dur-slow: 400ms;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(14,42,61,0.05), 0 1px 1px rgba(14,42,61,0.04);
  --shadow-md: 0 6px 18px -6px rgba(14,42,61,0.12), 0 2px 4px rgba(14,42,61,0.06);
  --shadow-lg: 0 20px 40px -12px rgba(14,42,61,0.18), 0 6px 12px -4px rgba(14,42,61,0.08);
  --shadow-mint: 0 14px 30px -10px rgba(30,142,137,0.35);
  --shadow-coral: 0 14px 30px -10px rgba(233,96,75,0.30);

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

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

.mono { font-family: var(--mono); }

a {
  color: var(--teal);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}
a:hover { color: var(--ocean); text-decoration: underline; text-underline-offset: 3px; }

img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.5rem, 5.5vw, 4.25rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.9rem, 3.8vw, 2.75rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.015em; line-height: 1.25; }
h4 { font-size: 0.92rem; }
p  { margin: 0 0 1em; max-width: 62ch; }

em { font-style: italic; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247,249,250,0.85);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.875rem var(--pad);
  max-width: var(--maxw);
  margin: 0 auto;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.nav__brand img, .nav__brand svg { height: 48px; width: auto; display: block; }
.nav__links { display: flex; gap: 1.5rem; align-items: center; flex-wrap: wrap; }
.nav__links a { color: var(--ink); font-size: 0.95rem; font-weight: 500; position: relative; }
.nav__links a:hover { color: var(--teal); text-decoration: none; }
.nav__links a:not(.nav__cta)::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav__links a:not(.nav__cta):hover::after,
.nav__links a:not(.nav__cta)[aria-current="page"]::after { transform: scaleX(1); }
.nav__links a[aria-current="page"] { color: var(--teal); }
.nav__cta {
  background: var(--navy);
  color: var(--paper) !important;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav__cta:hover { background: var(--teal); color: var(--navy) !important; text-decoration: none; }
.nav__toggle { display: none; background: none; border: 0; font-size: 1.5rem; cursor: pointer; color: var(--ink); padding: 0.5rem 0.65rem; border-radius: var(--radius); }
.nav__toggle:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; border-radius: 2px; }
.btn:focus-visible { outline: 2px solid var(--aqua); outline-offset: 3px; }

@media (max-width: 860px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem var(--pad) 1.25rem;
    gap: 0.75rem;
    display: none;
    box-shadow: var(--shadow-md);
  }
  .nav[data-open="true"] .nav__links { display: flex; }
}

/* ---------- Sections ---------- */
section { padding: clamp(3.5rem, 8vw, 6.5rem) 0; position: relative; }
section.dark { background: var(--navy); color: var(--paper); }
section.dark a { color: var(--aqua); }
section.dark h1, section.dark h2, section.dark h3 { color: var(--paper); }
section.paper-alt { background: var(--paper-alt); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--teal);
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--teal);
  display: inline-block;
}
.dark .eyebrow { color: var(--aqua); }
.dark .eyebrow::before { background: var(--aqua); }

/* ---------- Hero ---------- */
.hero {
  background: var(--navy);
  color: var(--paper);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: url('/assets/bg/topography.svg') no-repeat center / cover;
  opacity: 0.55;
  z-index: -1;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 55% 60% at 82% 35%, rgba(90,217,201,0.22), transparent 60%),
    radial-gradient(ellipse 50% 60% at 10% 90%, rgba(30,110,138,0.25), transparent 60%);
  pointer-events: none;
  z-index: -1;
}
.hero__inner { position: relative; z-index: 1; padding-block: clamp(4.5rem, 11vw, 8rem) clamp(4rem, 10vw, 7rem); }
.hero h1 { color: var(--paper); max-width: 18ch; }
.hero .lede { font-size: clamp(1.05rem, 1.5vw, 1.25rem); color: #CAD4DB; max-width: 58ch; }
.hero .tagline { color: var(--aqua); font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.14em; text-transform: uppercase; }

/* Hero statline - live below the CTA row */
.hero__stat {
  margin-top: 3rem;
  display: flex; flex-wrap: wrap; gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(247,249,250,0.12);
}
.hero__stat .metric__value { color: var(--aqua); font-size: clamp(1.6rem, 2.8vw, 2.25rem); }
.hero__stat .metric__label { color: #94A3AE; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 0;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
  letter-spacing: -0.005em;
  line-height: 1;
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--aqua); color: var(--navy) !important; }
.btn--primary:hover { background: var(--paper); }
.btn--ghost { background: transparent; border: 1px solid currentColor; color: inherit !important; }
.btn--ghost:hover { background: rgba(247,249,250,0.08); box-shadow: none; }
.dark .btn--ghost:hover { background: rgba(247,249,250,0.08); }
body > section:not(.dark):not(.hero) .btn--ghost { color: var(--ink) !important; border-color: var(--line); }
body > section:not(.dark):not(.hero) .btn--ghost:hover { background: var(--paper-alt); border-color: var(--navy); }
.hero .btn--ghost { color: var(--paper) !important; border-color: rgba(247,249,250,0.55); }
.hero .btn--ghost:hover { background: rgba(247,249,250,0.08); border-color: var(--paper); }
.btn--coral { background: var(--coral); color: var(--paper) !important; }
.btn--coral:hover { background: var(--coral-dark); box-shadow: var(--shadow-coral); }
.btn--mint { background: var(--mint); color: var(--navy) !important; }
.btn--mint:hover { background: var(--aqua-soft); box-shadow: var(--shadow-mint); }
.btn-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.75rem; }

/* ---------- Cards & grids ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.9rem;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  position: relative;
  overflow: hidden;
}
.card:hover { border-color: var(--teal); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card h3 { margin-top: 0.5rem; }
.card p { color: var(--ink-soft); font-size: 0.97rem; }
.card a { font-weight: 600; }

.card__tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.6rem;
}
.tag--gms { background: rgba(45,184,179,0.12); color: var(--ocean); }
.tag--srs { background: rgba(69,235,216,0.18); color: var(--mint-dark); }
.tag--catalyst { background: rgba(233,96,75,0.14); color: var(--coral-dark); }
.tag--institute { background: rgba(14,42,61,0.08); color: var(--navy); }

.card--dark { background: var(--navy-soft); color: var(--paper); border-color: var(--line-dark); }
.card--dark h3 { color: var(--paper); }
.card--dark p { color: #B6C3CB; }
.card--dark:hover { border-color: var(--aqua); }
.card--dark a { color: var(--aqua); }

/* Card variants that pick up sub-brand hover accents */
.card--srs:hover { border-color: var(--mint); }
.card--catalyst:hover { border-color: var(--coral); }
.card--institute:hover { border-color: var(--navy); }

/* Whole-card click target: applies to .card--linked, expands the first inline link to fill the card */
.card--linked { cursor: point