/* ============================================================
   LeaderSourceLearn — Stylesheet
   ============================================================
   Edit theme colors in :root below. One file, all styles.
   ============================================================ */

:root {
  /* Brand palette */
  --navy: #2a3162;
  --navy-deep: #1a2049;
  --navy-soft: #4a5189;
  --cornflower: #5996ff;
  --cornflower-deep: #3b7fef;

  /* Surface */
  --paper: #ffffff;
  --paper-tint: #f6f8fc;
  --paper-warm: #fdfbf6;

  /* Text */
  --text: #1a1f3a;
  --text-muted: #5d6480;
  --text-soft: #8d94a8;

  /* Lines */
  --rule: #e3e8f1;

  /* Status colors */
  --required: #b9492a;
  --required-bg: #fcf0ea;
  --placeholder-color: #b9492a;
  --placeholder-bg: #fcf5e8;

  /* Typography */
  --font-body: 'Manrope', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e1228;
    --paper-tint: #161b35;
    --paper-warm: #1a1d35;
    --text: #e6eafd;
    --text-muted: #a0a7c4;
    --text-soft: #6a7090;
    --rule: #232a4c;
    --navy: #c5cef0;
    --navy-deep: #ffffff;
    --navy-soft: #8a93b8;
    --required: #ff8c63;
    --required-bg: #2a1a16;
    --placeholder-color: #ff8c63;
    --placeholder-bg: #2e2316;
  }
}

* { box-sizing: border-box; }
html, body, h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; padding: 0; }

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--text);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 1.25rem 0;
}

.site-header-inner {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.brand-logo {
  height: 26px;
  width: auto;
  display: block;
}

.brand-divider {
  width: 1px;
  height: 22px;
  background: var(--rule);
}

.brand-section {
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: -0.005em;
  color: var(--text-muted);
}

@media (prefers-color-scheme: dark) {
  /* Dark mode: invert the logo since it's a navy/cornflower wordmark on white */
  .brand-logo { filter: brightness(0) invert(1); opacity: 0.92; }
}

nav.site-nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

nav.site-nav a {
  font-weight: 500;
  font-size: 0.94rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: -0.005em;
  transition: color 0.15s ease;
  position: relative;
}

nav.site-nav a:hover { color: var(--cornflower-deep); }

nav.site-nav a[aria-current="page"] {
  color: var(--text);
}
nav.site-nav a[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--cornflower);
}

/* ============================================================
   Main content
   ============================================================ */
main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 3.5rem 1.75rem 5rem;
}

/* Headings */
h1 {
  font-size: clamp(2.1rem, 5vw, 2.85rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.028em;
  color: var(--navy-deep);
  margin-bottom: 0.7rem;
}

.lede {
  font-size: 1.25rem;
  line-height: 1.45;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 3rem;
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.018em;
  margin-top: 3rem;
  margin-bottom: 0.9rem;
  color: var(--text);
}
h2:first-of-type { margin-top: 0; }

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.008em;
  margin-bottom: 0.4rem;
  color: var(--text);
}

p {
  font-size: 1.02rem;
  margin-bottom: 1.05rem;
  color: var(--text);
}

a {
  color: var(--cornflower-deep);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
  font-weight: 500;
  transition: text-decoration-thickness 0.15s ease;
}
a:hover { text-decoration-thickness: 2px; }

strong { font-weight: 600; color: var(--text); }
em { font-style: italic; }

ul, ol { margin: 0 0 1.05rem 1.2rem; }
ul li, ol li { margin-bottom: 0.3rem; padding-left: 0.2rem; }

/* ============================================================
   Components
   ============================================================ */

/* Eyebrow - small label above an H1 */
.eyebrow {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cornflower-deep);
  margin-bottom: 0.9rem;
}

/* Mistake / principle block */
.mistake {
  margin-bottom: 1.6rem;
}
.mistake p:first-child {
  margin-bottom: 0.35rem;
}
.mistake strong {
  font-weight: 700;
  color: var(--navy-deep);
}

/* Resource card */
.resource {
  border-top: 1px solid var(--rule);
  padding: 1.6rem 0 0.3rem;
  margin-top: 1.4rem;
}
.resource:first-of-type { margin-top: 1.2rem; }
.resource h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy-deep);
  letter-spacing: -0.015em;
}
.resource-meta {
  font-size: 0.88rem;
  color: var(--text-soft);
  margin-bottom: 0.8rem;
  font-weight: 500;
}
.resource-link {
  display: inline-block;
  margin-top: 0.2rem;
  font-weight: 600;
  font-size: 0.97rem;
  text-decoration: none;
  color: var(--cornflower-deep);
}
.resource-link::after {
  content: ' \2192';
  display: inline-block;
  transition: transform 0.15s ease;
}
.resource-link:hover {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.25em;
}
.resource-link:hover::after { transform: translateX(2px); }

/* Badges */
.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  margin-right: 0.4rem;
  vertical-align: 0.05em;
}
.badge--required {
  background: var(--required);
  color: #ffffff;
}
.badge--recommended {
  background: transparent;
  color: var(--cornflower-deep);
  border: 1.5px solid var(--cornflower-deep);
  padding: 0.15rem 0.6rem;
}
.badge--optional {
  background: transparent;
  color: var(--text-soft);
  border: 1.5px solid var(--rule);
  padding: 0.15rem 0.6rem;
}
.badge--placeholder {
  background: var(--placeholder-bg);
  color: var(--placeholder-color);
  border: 1px dashed var(--placeholder-color);
  padding: 0.12rem 0.55rem;
}

/* Callout - framing note */
.callout {
  background: var(--paper-tint);
  border-left: 3px solid var(--cornflower);
  padding: 1.1rem 1.3rem;
  margin: 1.8rem 0;
  border-radius: 0 6px 6px 0;
}
.callout p {
  font-size: 0.98rem;
  margin-bottom: 0.7rem;
  color: var(--text-muted);
}
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--navy-deep); }

/* Tracks grid (home page) */
.tracks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
  margin: 1.5rem 0 0;
}
.track-card {
  padding: 1.3rem 1.4rem;
  background: var(--paper-tint);
  border-radius: 8px;
  border-left: 3px solid var(--rule);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.track-card.live { border-left-color: var(--cornflower); }
.track-card:hover { transform: translateX(2px); }
.track-card h3 {
  font-size: 1.05rem;
  margin: 0 0 0.2rem;
}
.track-card h3 a {
  color: var(--navy-deep);
  text-decoration: none;
  font-weight: 700;
}
.track-card h3 a:hover { color: var(--cornflower-deep); }
.track-card .track-status {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 0.45rem;
}
.track-card.live .track-status { color: var(--cornflower-deep); }
.track-card p {
  font-size: 0.94rem;
  color: var(--text-muted);
  margin: 0;
}

/* Next-step CTA (dark navy panel) */
.next-step {
  margin-top: 3rem;
  padding: 1.6rem 1.8rem;
  background: var(--navy-deep);
  color: #ffffff;
  border-radius: 10px;
}
.next-step p {
  color: #ffffff;
  margin-bottom: 0.4rem;
}
.next-step p:last-child { margin-bottom: 0; }
.next-step strong { color: #ffffff; }
.next-step a {
  color: #ffffff;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: underline;
  text-decoration-color: var(--cornflower);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.25em;
}
.next-step a:hover { text-decoration-color: #ffffff; }

@media (prefers-color-scheme: dark) {
  .next-step {
    background: var(--cornflower);
    color: #0e1228;
  }
  .next-step p, .next-step strong { color: #0e1228; }
  .next-step a { color: #0e1228; text-decoration-color: #0e1228; }
}

/* Coming soon placeholder */
.coming-soon {
  text-align: center;
  padding: 5rem 0 3rem;
}
.coming-soon .eyebrow { display: inline-block; margin-bottom: 1.5rem; }
.coming-soon h1 { margin-bottom: 1.2rem; }
.coming-soon p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 32rem;
  margin: 0 auto;
}
.coming-soon p + p { margin-top: 1rem; }

/* Section divider */
hr.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3rem 0;
}

/* ============================================================
   Footer
   ============================================================ */
footer.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2.5rem 1.75rem 3rem;
  margin-top: 2rem;
  text-align: center;
  color: var(--text-soft);
  font-size: 0.9rem;
}
footer.site-footer p {
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  color: var(--text-soft);
}
footer.site-footer a {
  color: var(--text-muted);
  font-weight: 500;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 640px) {
  html { font-size: 16px; }
  main { padding: 2.5rem 1.5rem 4rem; }
  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 0 1.5rem;
  }
  nav.site-nav { gap: 1.1rem 1.3rem; font-size: 0.9rem; }
  h1 { letter-spacing: -0.022em; }
  h2 { margin-top: 2.4rem; }
  .next-step { padding: 1.3rem 1.4rem; }
  .resource h3 { font-size: 1.15rem; }
}

@media (max-width: 420px) {
  nav.site-nav { gap: 0.9rem 1rem; font-size: 0.88rem; }
}


/* "More courses" sub-section on foundations page */
.more-courses {
  margin-top: 3rem;
  font-size: 1.1rem;
}