/* Reset, typography, utilities, buttons */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--text-body);
  background: var(--white);
  overflow-x: hidden;
  line-height: 1.65;
  font-feature-settings: 'ss01', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; font-family: inherit; }

/* ── TYPOGRAPHY ── */
.font-display { font-family: 'Plus Jakarta Sans', sans-serif; letter-spacing: -0.025em; }
.font-mono { font-family: 'IBM Plex Mono', 'IBM Plex Sans', monospace; font-feature-settings: 'tnum'; }
.font-num { font-family: 'IBM Plex Sans', 'Inter', sans-serif; font-feature-settings: 'tnum', 'ss01'; letter-spacing: -0.02em; }
h1,h2,h3,h4 { font-family: 'Plus Jakarta Sans', 'Inter', sans-serif; line-height: 1.15; font-weight: 600; letter-spacing: -0.025em; color: var(--gray-800); }
h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); font-weight: 600; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); font-weight: 600; letter-spacing: -0.03em; }
h3 { font-size: clamp(1.05rem, 1.8vw, 1.25rem); font-weight: 600; letter-spacing: -0.015em; }
h4 { font-size: 0.92rem; font-weight: 600; letter-spacing: -0.01em; }
p { color: var(--text-body); line-height: 1.7; font-size: 0.95rem; }

/* ── UTILITIES ── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.text-accent { color: var(--brand-blue-600); }
.text-navy { color: var(--brand-blue-700); }
.text-center { text-align: center; }
/* Section divider rule — one of the sanctioned gradient uses */
.accent-line {
  display: block; width: 52px; height: 3px;
  background: var(--grad-divider);
  border-radius: 2px; margin: 18px 0;
}
.accent-line-center { margin: 18px auto; }
.label-tag {
  display: inline-block; font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--brand-blue-700);
  background: var(--brand-blue-50); padding: 5px 14px; border-radius: 20px;
  border: 1px solid var(--brand-blue-200); margin-bottom: 14px;
}

/* Visually-hidden — paired with ✓/– marks so screen readers hear
   "Required" / "Not required" instead of "check, check, dash". */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: var(--radius); font-size: 0.88rem;
  font-weight: 600; letter-spacing: -0.005em; transition: var(--transition);
  cursor: pointer; font-family: 'Inter', sans-serif; border: none;
}
/* Sits on the dark hero — stays white, fills with the brand gradient on hover */
.btn-primary {
  background: var(--white); color: var(--brand-blue-900);
  border: 1px solid var(--white);
}
.btn-primary:hover {
  background: var(--grad-primary); color: var(--white);
  border-color: transparent; transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(var(--brand-blue-900-rgb),0.35);
}
.btn-outline {
  background: transparent; color: var(--white);
  border: 1px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: var(--white); }
.btn-ghost {
  background: transparent; color: rgba(255,255,255,0.85);
  border: 1px solid rgba(255,255,255,0.18);
}
.btn-ghost:hover { background: rgba(255,255,255,0.06); color: var(--white); border-color: rgba(255,255,255,0.4); }
.btn-ghost-light {
  background: transparent; color: var(--white);
  border: 1px solid rgba(255,255,255,0.3); text-decoration: none;
}
.btn-ghost-light:hover { background: rgba(255,255,255,0.08); border-color: var(--white); }
/* Primary solid CTA on white — gradient fill (white text = 6.67:1 min) */
.btn-navy, .btn-brand {
  background: var(--grad-primary); color: var(--white);
}
.btn-navy:hover, .btn-brand:hover {
  background: var(--grad-primary-hover); transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(var(--brand-blue-600-rgb),0.30);
}
.link-arrow {
  background: transparent; border: none; color: var(--brand-blue-600); font-weight: 600;
  font-size: 0.88rem; padding: 8px 0; cursor: pointer; display: inline-flex;
  align-items: center; gap: 6px; font-family: inherit; letter-spacing: -0.005em;
  border-bottom: 1px solid transparent; transition: var(--transition);
}
.link-arrow:hover { gap: 10px; color: var(--brand-blue-700); border-bottom-color: var(--brand-blue-600); }

/* Keyboard focus — visible on both light and dark surfaces */
:focus-visible {
  outline: 2px solid var(--brand-blue-600);
  outline-offset: 2px; border-radius: 2px;
}
.btn-outline:focus-visible, .btn-ghost:focus-visible,
.btn-ghost-light:focus-visible, .btn-primary:focus-visible {
  outline-color: var(--white);
}