/* The Learning Professionals Community — shared design system */

:root {
  --ink: #10201F;
  --ink-soft: #24403D;
  --paper: #F6F3ED;
  --surface: #FFFFFF;
  --surface-alt: #FBF9F5;
  --teal: #0F6F68;
  --teal-deep: #0A4B46;
  --teal-wash: #E6F0EE;
  --clay: #C2563B;
  --clay-deep: #9C4028;
  --amber: #C98A2E;
  --muted: #5C6B69;
  --line: #E2DDD3;
  --line-soft: #EDE9E1;

  --serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

  --wrap: 1060px;
  --narrow: 720px;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(16, 32, 31, 0.05), 0 1px 3px rgba(16, 32, 31, 0.04);
  --shadow-md: 0 4px 16px rgba(16, 32, 31, 0.08);
  --shadow-lg: 0 16px 48px rgba(16, 32, 31, 0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 86px; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--teal); }

/* ---------- Masthead ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 243, 237, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.masthead-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.wordmark .mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.wordmark-text {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.15;
  color: var(--ink);
  letter-spacing: -0.015em;
}

.wordmark-text span {
  display: block;
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 2px;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 7px 12px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.site-nav a:hover { background: var(--surface); color: var(--teal-deep); }
.site-nav a.current { color: var(--teal-deep); font-weight: 600; }

.site-nav a.nav-cta {
  background: var(--clay);
  color: #fff;
  font-weight: 600;
  padding: 8px 16px;
  margin-left: 6px;
}

.site-nav a.nav-cta:hover { background: var(--clay-deep); color: #fff; }

/* ---------- Layout ---------- */

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: var(--narrow); }

section { padding: 72px 0; }
section.tight { padding: 52px 0; }

.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--clay);
  margin-bottom: 14px;
}

h1, h2, h3 { font-family: var(--serif); letter-spacing: -0.02em; line-height: 1.15; font-weight: 600; }

h2 { font-size: clamp(28px, 4vw, 38px); color: var(--ink); margin-bottom: 14px; }
h3 { font-size: 20px; letter-spacing: -0.015em; }

.lede { font-size: 18px; color: var(--ink-soft); max-width: 62ch; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  padding: 13px 24px;
  border-radius: 8px;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  border: 1px solid transparent;
}

.btn-primary { background: var(--clay); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--clay-deep); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: var(--surface); border-color: var(--muted); transform: translateY(-1px); }

.btn-light { background: rgba(255,255,255,0.12); color: #fff; border-color: rgba(255,255,255,0.3); }
.btn-light:hover { background: rgba(255,255,255,0.2); transform: translateY(-1px); }

/* ---------- Footer ---------- */

.site-foot {
  background: var(--ink);
  color: #BFCFCC;
  padding: 56px 0 40px;
  font-size: 14px;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  align-items: start;
}

.site-foot .foot-name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.015em;
  margin-bottom: 10px;
}

.site-foot p { max-width: 42ch; line-height: 1.65; }

.foot-col h4 {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #7E9793;
  margin-bottom: 12px;
}

.foot-col a {
  display: block;
  color: #DCE7E5;
  text-decoration: none;
  padding: 4px 0;
  transition: color 0.15s;
}

.foot-col a:hover { color: #fff; text-decoration: underline; }

.foot-rule {
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: 40px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #7E9793;
}

.foot-rule a { color: #BFCFCC; }

@media (max-width: 760px) {
  body { font-size: 16px; }
  section { padding: 52px 0; }
  .masthead-inner { padding: 12px 18px; gap: 12px; }
  .wrap { padding: 0 18px; }
  .site-nav { gap: 2px; }
  .site-nav a { padding: 6px 9px; font-size: 13px; }
  .site-nav a.nav-cta { padding: 7px 13px; margin-left: 2px; }
  .wordmark-text { font-size: 15px; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 420px) {
  .site-nav a:not(.nav-cta) { display: none; }
}