/* =========================================================
   AI Agents in Finance — site.css
   Token architecture mirrors the course landing pages
   (training-b2c) so the funnel feels seamless.
   Site accent: authority navy + gold secondary.
   Level accents (blue / violet / teal) kept for level cards.
   ========================================================= */

:root {
  /* dark theme is the site's default — teal-tinted charcoal */
  color-scheme: dark;
  --bg: #0b1514;
  --bg-alt: #101d1c;
  --bg-card: #142523;
  --text: #edf7f6;
  --text-muted: #9db8b4;
  --border: #23403d;
  --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);

  /* brand teal (#68dad5) — accents AND primary buttons */
  --brand: #68dad5;
  --accent: #68dad5;
  --accent-strong: #3b82f6;
  --accent-soft: #123f3c;
  --accent-text: #8ce8e2;
  --accent-rgb: 104, 218, 213;
  --btn-bg: linear-gradient(135deg, #74e3de, #3db9b2);
  --btn-text: #04211f;

  /* atmosphere (backgrounds) */
  --glow-teal: rgba(104, 218, 213, .17);
  --glow-navy: rgba(59, 130, 246, .14);

  /* gold secondary — credibility highlights (kickers, stars, book) */
  --gold: #fbbf24;
  --gold-soft: #3a2c0f;
  --gold-text: #fcd34d;

  /* semantic */
  --green: #4ade80;
  --red: #f87171;
  --star: #f59e0b;

  /* level accents (for cards linking to course landing pages) */
  --l1: #60a5fa; --l1-soft: #1e3a5f; --l1-text: #93c5fd;
  --l2: #a78bfa; --l2-soft: #2e1f5e; --l2-text: #c4b5fd;
  --l3: #2dd4bf; --l3-soft: #123f39; --l3-text: #7deee0;
}

/* ---------- base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent-text); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
section { padding: 72px 0; }
.alt {
  background:
    radial-gradient(700px 320px at 92% 0%, var(--glow-teal), transparent 65%),
    linear-gradient(180deg, var(--bg-alt), color-mix(in srgb, var(--brand) 5%, var(--bg)));
}

h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.12; letter-spacing: -.03em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); letter-spacing: -.02em; margin-bottom: 12px; }
h3 { font-size: 1.15rem; letter-spacing: -.01em; }
.lead { font-size: 1.05rem; color: var(--text-muted); max-width: 680px; }
.center { text-align: center; }
.center .lead { margin: 0 auto; }

.kicker {
  font-size: .8rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent-text); margin-bottom: 10px;
}
.kicker.gold { color: var(--gold); }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; background: var(--btn-bg); color: var(--btn-text);
  font-weight: 700; padding: 14px 28px; border-radius: 10px;
  text-decoration: none; border: none; cursor: pointer; font-size: 1rem;
  box-shadow: 0 4px 16px rgba(var(--accent-rgb), .40);
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); box-shadow: 0 6px 22px rgba(var(--accent-rgb), .55); }
.btn-ghost {
  display: inline-block; color: var(--accent-text); font-weight: 600;
  padding: 14px 28px; border-radius: 10px; text-decoration: none;
  border: 1px solid var(--border); transition: background .15s ease;
}
.btn-ghost:hover { background: var(--accent-soft); }
.btn-sm { padding: 10px 18px; font-size: .9rem; }

/* ---------- topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; max-width: 1120px; margin: 0 auto; gap: 16px;
}
.brand { font-weight: 700; font-size: 1.05rem; text-decoration: none; color: var(--text); white-space: nowrap; }
.brand span { color: var(--accent); }
.site-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.site-nav a {
  color: var(--text-muted); text-decoration: none; font-weight: 500;
  font-size: .92rem; padding: 8px 12px; border-radius: 8px;
}
.site-nav a:hover { color: var(--text); background: var(--bg-alt); }
.site-nav a[aria-current="page"] { color: var(--accent-text); background: var(--accent-soft); }
.site-nav .nav-cta { background: var(--btn-bg); color: var(--btn-text); font-weight: 700; margin-left: 6px; }
.site-nav .nav-cta:hover { background: var(--btn-bg); color: var(--btn-text); filter: brightness(1.05); }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 12px; font-size: 1.1rem; color: var(--text); cursor: pointer;
}
@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; padding: 12px 24px 20px;
    background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
  }
  .site-nav.is-open { display: flex; }
}

/* ---------- nav dropdown ("Work with me") ---------- */
.nav-group { position: relative; }
.nav-drop-btn {
  background: none; border: none; cursor: pointer; font: inherit;
  color: #ffffff; font-weight: 600; font-size: .92rem;
  padding: 8px 12px; border-radius: 8px;
}
.nav-drop-btn:hover { color: #ffffff; background: var(--bg-alt); }
.nav-drop {
  display: none; position: absolute; top: 100%; left: 0; min-width: 260px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); padding: 8px; z-index: 60;
}
.nav-drop a {
  display: block; padding: 10px 14px; border-radius: 8px;
  color: var(--text); text-decoration: none; font-size: .92rem; font-weight: 500;
}
.nav-drop a:hover { background: var(--accent-soft); color: var(--accent-text); }
.nav-drop a .drop-note { display: block; font-size: .8rem; font-weight: 400; color: var(--text-muted); }
.nav-group:hover .nav-drop,
.nav-group:focus-within .nav-drop,
.nav-group.is-open .nav-drop { display: block; }
@media (max-width: 880px) {
  .nav-group { position: static; }
  .nav-drop {
    display: block; position: static; border: none; box-shadow: none;
    padding: 0 0 0 16px; min-width: 0; background: transparent;
  }
  .nav-drop-btn { display: none; }
}

/* ---------- photos ---------- */
.avatar-photo {
  width: 200px; height: 200px; object-fit: cover; object-position: top;
  border-radius: 20px; box-shadow: var(--shadow);
}
.portrait {
  width: 100%; max-width: 380px; border-radius: 16px;
  box-shadow: var(--shadow); border: 1px solid var(--border);
}

/* ---------- promo banner (configurable launch slot) ---------- */
.promo-banner {
  background: var(--gold-soft); color: var(--gold-text);
  text-align: center; padding: 10px 24px; font-size: .92rem; font-weight: 600;
}
.promo-banner a { color: inherit; }

/* ---------- hero ---------- */
.hero {
  padding: 88px 0 72px;
  background:
    radial-gradient(1100px 520px at 80% -12%, var(--glow-teal), transparent 62%),
    radial-gradient(750px 420px at 4% 108%, var(--glow-navy), transparent 62%),
    linear-gradient(180deg, color-mix(in srgb, var(--brand) 7%, var(--bg)), var(--bg) 78%);
}
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr;
  gap: 48px; align-items: center;
}
.hero-photo-frame { position: relative; justify-self: end; max-width: 380px; }
.hero-photo-frame::before {
  content: ""; position: absolute; inset: -14px -14px 14px 14px;
  border-radius: 24px; z-index: -1;
  background: linear-gradient(140deg, var(--brand), transparent 65%);
  opacity: .55;
}
.hero-photo {
  width: 100%; border-radius: 20px; display: block;
  box-shadow: 0 18px 44px rgba(6, 48, 45, .30);
}
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-photo-frame { justify-self: center; max-width: 300px; }
}
.hero .badge {
  display: inline-block; background: var(--accent-soft); color: var(--accent-text);
  font-size: .85rem; font-weight: 600; padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}
.hero .sub { font-size: 1.15rem; color: var(--text-muted); max-width: 640px; margin: 18px 0 28px; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.chips { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 28px; }
.chip {
  font-size: .85rem; color: var(--text-muted); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 999px; background: var(--bg-card);
}

/* ---------- proof strip ---------- */
.proof-strip {
  background:
    radial-gradient(700px 320px at 92% 0%, var(--glow-teal), transparent 65%),
    linear-gradient(180deg, var(--bg-alt), color-mix(in srgb, var(--brand) 5%, var(--bg)));
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 18px 0; font-size: .92rem; color: var(--text-muted);
}
.proof-strip .wrap { display: flex; gap: 12px 32px; flex-wrap: wrap; justify-content: center; }

/* ---------- cards & grids ---------- */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 24px; box-shadow: var(--shadow);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.card:hover {
  border-color: color-mix(in srgb, var(--brand) 45%, var(--border));
  box-shadow: 0 6px 24px rgba(var(--accent-rgb), .16);
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 880px) { .grid3, .grid4 { grid-template-columns: 1fr; } }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }

/* offer cards (offers hub + home) */
.offer-card {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px; box-shadow: var(--shadow);
  border-top: 4px solid var(--brand);
  transition: transform .15s ease, border-color .2s ease, box-shadow .2s ease;
}
.offer-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--brand) 45%, var(--border));
  box-shadow: 0 8px 28px rgba(var(--accent-rgb), .18);
}
.offer-card .icon { font-size: 1.8rem; }
.offer-card .who {
  font-size: .85rem; font-weight: 600; color: var(--accent-text);
  background: var(--accent-soft); align-self: flex-start;
  padding: 4px 12px; border-radius: 999px;
}
.offer-card p { color: var(--text-muted); font-size: .95rem; flex: 1; }
.offer-card .card-cta { font-weight: 600; text-decoration: none; color: var(--accent-text); }

/* level cards — keep course accent colors */
.level-card { border-top: 4px solid var(--l1); }
.level-card.l2 { border-top-color: var(--l2); }
.level-card.l3 { border-top-color: var(--l3); }
.level-tag {
  align-self: flex-start; font-size: .8rem; font-weight: 700;
  padding: 4px 12px; border-radius: 999px; background: var(--l1-soft); color: var(--l1-text);
}
.level-card.l2 .level-tag { background: var(--l2-soft); color: var(--l2-text); }
.level-card.l3 .level-tag { background: var(--l3-soft); color: var(--l3-text); }
.level-card .price { font-weight: 800; font-size: 1.3rem; }
.level-card .meta { font-size: .88rem; color: var(--text-muted); }

/* numbered outcomes */
.outcome { display: flex; gap: 14px; align-items: flex-start; }
.outcome .num {
  flex: 0 0 26px; height: 26px; border-radius: 8px; background: var(--accent-soft);
  color: var(--accent-text); font-weight: 800; font-size: .9rem;
  display: flex; align-items: center; justify-content: center;
}

/* ---------- article / observatory lists ---------- */
.article-list { display: flex; flex-direction: column; gap: 16px; }
.article-item {
  display: block; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 24px; text-decoration: none; color: var(--text);
  transition: border-color .15s ease;
}
.article-item:hover { border-color: var(--accent); }
.article-item h3 { margin-bottom: 4px; }
.article-item .meta { font-size: .85rem; color: var(--text-muted); }
.article-item .excerpt { font-size: .95rem; color: var(--text-muted); margin-top: 6px; }
.tag {
  display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; padding: 3px 10px; border-radius: 6px;
  background: var(--accent-soft); color: var(--accent-text); margin-bottom: 8px;
}
.tag.gold { background: var(--gold-soft); color: var(--gold-text); }
.tag.green { background: color-mix(in srgb, var(--green) 15%, transparent); color: var(--green); }

/* observatory entries */
.obs-entry {
  border-left: 3px solid var(--accent); padding: 4px 0 4px 20px; margin-bottom: 28px;
}
.obs-entry .date { font-size: .82rem; font-weight: 700; color: var(--text-muted); letter-spacing: .06em; text-transform: uppercase; }
.obs-entry h3 { margin: 4px 0; }
.obs-entry p { color: var(--text-muted); font-size: .95rem; }
.obs-entry .src { font-size: .85rem; }

/* ---------- accordion (FAQ / curriculum) ---------- */
details.acc {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 0; margin-bottom: 12px; overflow: hidden;
}
details.acc summary {
  list-style: none; cursor: pointer; display: flex; align-items: center;
  gap: 12px; padding: 18px 22px; font-weight: 600;
}
details.acc summary::-webkit-details-marker { display: none; }
details.acc summary::after {
  content: "+"; margin-left: auto; font-size: 1.3rem; color: var(--accent);
  transition: transform .2s ease;
}
details.acc[open] summary::after { transform: rotate(45deg); }
details.acc .acc-body { padding: 0 22px 18px; color: var(--text-muted); }

/* ---------- instructor / about ---------- */
.instructor { display: grid; grid-template-columns: 200px 1fr; gap: 36px; align-items: start; }
@media (max-width: 720px) { .instructor { grid-template-columns: 1fr; } }
.avatar {
  width: 200px; height: 200px; border-radius: 20px;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem; font-weight: 800; color: #fff;
}
.creds { list-style: none; margin-top: 14px; }
.creds li { padding-left: 20px; position: relative; margin-bottom: 8px; color: var(--text-muted); }
.creds li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); }

/* checklists */
.checks { list-style: none; }
.checks li { padding-left: 26px; position: relative; margin-bottom: 10px; }
.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 700; }

/* ---------- email capture ---------- */
.capture {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 32px; box-shadow: var(--shadow);
}
.capture form { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 16px; }
.capture input[type="email"] {
  flex: 1; min-width: 220px; padding: 13px 16px; font-size: 1rem;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg); color: var(--text);
}
.form-note { margin-top: 10px; font-size: .9rem; color: var(--green); }

/* ---------- book ---------- */
.book-photo {
  width: 100%; max-width: 300px; border-radius: 10px; display: block;
  box-shadow: 0 16px 40px rgba(6, 48, 45, .28);
  transition: transform .2s ease;
}
.book-photo:hover { transform: translateY(-3px) rotate(-.5deg); }
.book-cover {
  width: 100%; max-width: 280px; aspect-ratio: 2 / 3; border-radius: 8px;
  background: linear-gradient(150deg, var(--accent-strong), var(--accent) 55%, var(--gold));
  box-shadow: var(--shadow); display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; text-align: center; padding: 24px; font-size: 1.05rem;
}

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border); padding: 48px 0 32px;
  background:
    radial-gradient(800px 300px at 12% 0%, var(--glow-teal), transparent 65%),
    linear-gradient(180deg, var(--bg-alt), color-mix(in srgb, var(--brand) 6%, var(--bg-alt)));
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 12px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--text-muted); text-decoration: none; font-size: .92rem; }
.site-footer a:hover { color: var(--text); }
.footer-bottom { font-size: .85rem; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: 20px; }