/* Lead Centers | Foundations: design tokens, reset, layout helpers, buttons
   Part of the split stylesheet. Load order: base, layout, components, responsive. */

/* --- Design tokens ------------------------------------------------------- */
:root {
  /* Brand, sampled from the Lead Centers logo */
  --navy:         #143a75;  /* logo background navy */
  --sky:          #45a6e0;  /* "Centers" light blue */
  --brand:        #1a56a8;  /* primary action blue */
  --brand-dark:   #143a75;
  --brand-soft:   #eaf2fc;
  --brand-border: #c3ddf5;

  /* Accents */
  --green:        #16a34a;
  --green-soft:   #eafaf0;
  --amber:        #b45309;
  --amber-soft:   #fef6e7;
  --violet:       #2f8fce;  /* sky family, used for intent/secondary tags */
  --violet-soft:  #e7f4fd;

  /* Neutrals */
  --ink:          #0f172a;
  --ink-2:        #334155;
  --muted:        #5b6478;
  --muted-2:      #8b93a5;
  --line:         #e6e9f0;
  --line-strong:  #d3d9e4;
  --surface:      #ffffff;
  --surface-2:    #f7f8fb;
  --surface-3:    #f1f3f9;

  /* Shape & depth */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 26px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, .06), 0 12px 28px rgba(15, 23, 42, .05);
  --shadow-lg: 0 10px 24px rgba(15, 23, 42, .08), 0 28px 60px rgba(15, 23, 42, .08);

  /* Layout */
  --maxw: 1180px;
  --gutter: 24px;

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

/* --- Base ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-2);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

/* --- Layout helpers ------------------------------------------------------ */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

section { padding: 88px 0; }
.section--tint { background: var(--surface-2); }
.section--edge { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.head--left { margin-inline: 0; text-align: left; }

.h2 { font-size: clamp(28px, 3.6vw, 42px); }
.h3 { font-size: clamp(21px, 2.2vw, 26px); }

.lede {
  margin-top: 16px;
  font-size: 17.5px;
  color: var(--muted);
  line-height: 1.65;
}

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* --- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 620;
  line-height: 1;
  padding: 14px 22px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .14s ease, box-shadow .18s ease, background .18s ease,
              border-color .18s ease, color .18s ease;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 1px 2px rgba(26, 86, 168,.28), 0 8px 20px rgba(26, 86, 168,.24);
}
.btn--primary:hover { background: var(--brand-dark); box-shadow: 0 2px 4px rgba(26,86,168,.3), 0 14px 28px rgba(26,86,168,.28); }

.btn--ghost {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { border-color: var(--muted-2); background: var(--surface-2); }

.btn--sm { padding: 10px 16px; font-size: 14px; }
.btn--lg { padding: 17px 30px; font-size: 16.5px; }
.btn--block { width: 100%; }

.btn--onbrand { background: #fff; color: var(--brand-dark); }
.btn--onbrand:hover { background: #f3f6ff; }

.btn--outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .45);
}
.btn--outline-light:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }