:root {
  --bg: #f8f9fd;
  --surface: #ffffff;
  --surface-soft: #f2f5fb;
  --ink: #23274f;
  --muted: #68708f;
  --brand-blue: #0F9CD1;
  --brand-indigo: #393FA1;
  --brand-yellow: #FFD350;
  --brand-red: #EB5753;
  --brand-green: #2FBD45;
  --green: #0F9CD1;
  --green-2: #393FA1;
  --lime: #FFD350;
  --line: rgba(57, 63, 161, 0.12);
  --shadow: 0 24px 70px rgba(57, 63, 161, 0.14);
  --radius: 28px;
  --container: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, Manrope, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
button { cursor: pointer; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: 112px 0; }
.section-soft { background: var(--surface-soft); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  padding: 14px 0;
  background: rgba(248, 249, 253, 0.90);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled {
  border-color: var(--line);
  box-shadow: 0 8px 30px rgba(57, 63, 161, .10);
}
.header-inner { display: flex; align-items: center; gap: 30px; }
.brand {
  display: inline-flex; align-items: center; text-decoration: none;
  white-space: nowrap;
}
.brand-logo {
  display: block; width: 112px; height: auto;
}
.brand-light .brand-logo { filter: invert(1); }
.main-nav { margin-left: auto; display: flex; gap: 24px; align-items: center; }
.main-nav a {
  color: #4f5785; text-decoration: none; font-size: 14px; font-weight: 650;
  transition: color .2s ease;
}
.main-nav a:hover { color: var(--brand-blue); }
.menu-toggle { display: none; border: 0; background: transparent; padding: 8px; }
.menu-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: var(--ink); }

.button {
  min-height: 48px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-dark { background: linear-gradient(135deg, var(--brand-indigo), #5258bd); color: #fff; box-shadow: 0 12px 32px rgba(57,63,161,.22); }
.button-accent { background: linear-gradient(135deg, var(--brand-green), #53cc65); color: #fff; box-shadow: 0 10px 30px rgba(47,189,69,.24); }
.button-ghost { border-color: rgba(57,63,161,.14); background: rgba(255,255,255,.72); color: var(--brand-indigo); }
.button-wide { width: 100%; }

.hero { padding-top: 170px; overflow: hidden; }
.hero-grid { min-height: 650px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 76px; align-items: center; }
.eyebrow {
  margin: 0 0 18px;
  color: var(--green);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0;
  font-size: clamp(52px, 7vw, 92px);
  line-height: .93;
  letter-spacing: -.065em;
  max-width: 760px;
}
.hero-lead { margin: 28px 0 0; max-width: 650px; font-size: 22px; font-weight: 700; letter-spacing: -.02em; }
.hero-sub { margin: 18px 0 0; max-width: 670px; color: var(--muted); font-size: 16px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.microcopy { color: var(--muted); font-size: 13px; max-width: 540px; margin: 16px 0 0; }

.hero-visual { position: relative; min-height: 560px; }
.orb { position: absolute; border-radius: 50%; filter: blur(1px); }
.orb-one { width: 420px; height: 420px; right: -70px; top: 30px; background: linear-gradient(145deg, var(--brand-blue), var(--brand-indigo)); }
.orb-two { width: 280px; height: 280px; left: 10px; bottom: 10px; background: linear-gradient(145deg, var(--brand-green), #8ddd97); }
.orb-three { width: 118px; height: 118px; left: 18%; top: 3%; background: var(--brand-yellow); opacity: .95; }
.orb-four { width: 88px; height: 88px; right: 15%; bottom: 3%; background: var(--brand-red); opacity: .92; }
.hero-card {
  position: absolute;
  border: 1px solid rgba(255,255,255,.45);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.hero-card-main {
  width: min(420px, 86%); right: 5%; top: 22%; z-index: 2;
  padding: 34px; border-radius: 34px; background: rgba(255,255,255,.9);
}
.hero-card-main strong { display: block; font-size: 30px; line-height: 1.08; letter-spacing: -.04em; }
.hero-card-main p { color: var(--muted); margin: 18px 0 0; }
.hero-card-kicker { display: inline-block; margin-bottom: 22px; color: var(--green); font-weight: 800; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }
.hero-card-small {
  z-index: 3; min-width: 150px; padding: 18px 20px; border-radius: 22px; background: linear-gradient(135deg, var(--brand-indigo), rgba(15,156,209,.92)); color: #fff;
}
.hero-card-small span { display: block; color: #fff; font-size: 12px; font-weight: 900; margin-bottom: 4px; }
.card-a { left: 2%; top: 17%; background: linear-gradient(135deg, var(--brand-indigo), #585ec5); }
.card-b { right: 0; bottom: 8%; background: linear-gradient(135deg, var(--brand-blue), #36b7e7); }
.card-c { left: 12%; bottom: 15%; background: linear-gradient(135deg, var(--brand-red), #f0716d); color: #fff; }

.section-heading { display: grid; grid-template-columns: 62px minmax(0, 760px); gap: 18px; align-items: start; margin-bottom: 54px; }
.section-index {
  width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--line); font-weight: 850; color: var(--brand-indigo);
}
.section-heading h2, .result-copy h2, .pay-card h2 {
  margin: 0;
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1.02;
  letter-spacing: -.05em;
}
.split { display: grid; grid-template-columns: 1fr .85fr; gap: 70px; align-items: start; }
.split .section-heading { display: grid; grid-template-columns: 62px 1fr; margin: 0; }
.about-copy > p { margin: 0 0 30px; font-size: 20px; letter-spacing: -.02em; }
.feature-list { display: grid; gap: 12px; }
.feature-list article { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 18px 0; border-top: 1px solid rgba(57,63,161,.12); }
.feature-list article span { color: var(--green); font-weight: 900; }
.feature-list p { margin: 0; }

.program-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.program-card { min-height: 330px; padding: 34px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); position: relative; overflow: hidden; }
.program-card::before { content: ""; position: absolute; inset: 0 auto auto 0; width: 100%; height: 5px; background: var(--brand-blue); }
.program-card:nth-child(1)::before { background: var(--brand-blue); }
.program-card:nth-child(2)::before { background: var(--brand-indigo); }
.program-card:nth-child(3)::before { background: var(--brand-green); }
.program-card:nth-child(4)::before { background: var(--brand-red); }
.program-card:nth-child(1) .program-number, .program-card:nth-child(1) .program-tag { color: var(--brand-blue); }
.program-card:nth-child(2) .program-number, .program-card:nth-child(2) .program-tag { color: var(--brand-indigo); }
.program-card:nth-child(3) .program-number, .program-card:nth-child(3) .program-tag { color: var(--brand-green); }
.program-card:nth-child(4) .program-number, .program-card:nth-child(4) .program-tag { color: var(--brand-red); }
.program-card::after { content: ""; width: 110px; height: 110px; position: absolute; right: -35px; bottom: -35px; border-radius: 50%; background: rgba(15,156,209,.12); }
.program-number { color: var(--green); font-weight: 900; }
.program-card h3 { margin: 54px 0 4px; font-size: 30px; letter-spacing: -.04em; }
.program-tag { margin: 0 0 18px; color: var(--green); font-size: 13px; font-weight: 850; text-transform: uppercase; letter-spacing: .08em; }
.program-card > p:last-child { color: var(--muted); max-width: 520px; }

.section-dark { background: linear-gradient(135deg, #252b73 0%, #31398e 58%, #145f92 100%); color: #f6faf7; }
.result-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.eyebrow-light { color: #dcecff; }
.result-copy > p:not(.eyebrow) { color: rgba(246,250,247,.78); max-width: 520px; }
.result-copy .button { margin-top: 22px; }
.result-cards { display: grid; gap: 14px; }
.result-card { padding: 30px; border-radius: 24px; border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.08); }
.result-card span { color: #fff; font-weight: 900; font-size: 13px; }
.result-card { position: relative; overflow: hidden; }
.result-card::before { content: ""; position: absolute; left: 0; top: 0; width: 5px; height: 100%; background: var(--brand-blue); }
.result-card:nth-child(1)::before { background: var(--brand-blue); }
.result-card:nth-child(2)::before { background: var(--brand-green); }
.result-card:nth-child(3)::before { background: var(--brand-yellow); }
.result-card h3 { margin: 24px 0 8px; font-size: 26px; }
.result-card p { margin: 0; color: rgba(246,250,247,.68); }

.speaker-card { display: grid; grid-template-columns: .8fr 1.2fr; background: var(--surface); border: 1px solid var(--line); border-radius: 34px; overflow: hidden; box-shadow: var(--shadow); }
.speaker-copy { padding: 50px; display: flex; flex-direction: column; justify-content: center; }
.speaker-copy h3 { font-size: 34px; line-height: 1.1; letter-spacing: -.04em; margin: 20px 0; }
.speaker-copy p { color: var(--muted); margin: 0; }
.pill { align-self: flex-start; padding: 8px 12px; border-radius: 999px; background: rgba(57,63,161,.10); color: var(--brand-indigo); font-size: 12px; font-weight: 850; }
.speaker-image-wrap { background: linear-gradient(145deg, rgba(255,211,80,.14), rgba(15,156,209,.10)); padding: 24px; display: grid; place-items: center; }
.speaker-image-wrap img { width: 100%; border-radius: 18px; }

.trust-wrap { text-align: left; }
.trust-image { background: #fff; border-radius: 30px; padding: 34px; border: 1px solid var(--line); position: relative; overflow: hidden; }
.trust-image::before { content: ""; position: absolute; inset: 0 0 auto; height: 5px; background: linear-gradient(90deg, var(--brand-red), var(--brand-yellow), var(--brand-green), var(--brand-blue), var(--brand-indigo)); }
.trust-image img { width: 100%; max-width: 900px; margin: 0 auto; }

.pay-section { padding-top: 88px; padding-bottom: 88px; }
.pay-card { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: end; padding: 48px; border-radius: 34px; background: linear-gradient(135deg, rgba(15,156,209,.10), rgba(47,189,69,.10) 48%, rgba(255,211,80,.17)); color: var(--ink); border: 1px solid rgba(57,63,161,.10); position: relative; overflow: hidden; }
.pay-card::before { content: ""; position: absolute; inset: 0 0 auto; height: 6px; background: linear-gradient(90deg, var(--brand-red), var(--brand-yellow), var(--brand-green), var(--brand-blue), var(--brand-indigo)); }
.pay-card .eyebrow { color: var(--brand-green); }
.pay-card p:not(.eyebrow) { max-width: 720px; }
.pay-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
.pay-card .button-accent { background: linear-gradient(135deg, var(--brand-green), #53cc65); color: #fff; }

.footer { padding: 76px 0 28px; background: #222750; color: #f5f8f6; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.brand-light .brand-mark { color: var(--brand-yellow); }
.footer-grid > div:first-child p { color: rgba(245,248,246,.58); max-width: 460px; }
.footer-links { display: grid; gap: 16px; align-content: start; }
.footer-title { color: #bfeaff; font-weight: 850; text-transform: uppercase; letter-spacing: .1em; font-size: 12px; }
.contact-icons { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.contact-link {
  min-width: 0; padding: 14px; display: flex; align-items: center; gap: 11px;
  border: 1px solid rgba(255,255,255,.12); border-radius: 18px;
  background: rgba(255,255,255,.05); color: #f5f8f6; text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.contact-link:hover { transform: translateY(-2px); border-color: rgba(255,211,80,.55); background: rgba(255,255,255,.08); }
.contact-icon {
  flex: 0 0 auto; width: 38px; height: 38px; display: grid; place-items: center;
  border-radius: 50%; background: var(--brand-yellow); color: var(--brand-indigo);
}
.contact-icon svg { width: 20px; height: 20px; fill: currentColor; }
.contact-link:nth-child(1) .contact-icon { background: rgba(15,156,209,.18); color: #53c7ef; }
.contact-link:nth-child(2) .contact-icon { background: rgba(235,87,83,.18); color: #ff8b87; }
.contact-link:nth-child(3) .contact-icon { background: rgba(47,189,69,.18); color: #6be17c; }
.contact-link > span:last-child { min-width: 0; display: grid; gap: 2px; }
.contact-link strong { font-size: 13px; }
.contact-link small { color: rgba(245,248,246,.56); font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 44px; margin-top: 48px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(245,248,246,.45); font-size: 12px; }

.floating-cta {
  position: fixed; right: 20px; bottom: 20px; z-index: 40;
  min-height: 50px; padding: 0 20px; border: 0; border-radius: 999px; background: linear-gradient(135deg, var(--brand-green), #53cc65); color: #fff; font-weight: 900; box-shadow: 0 16px 40px rgba(47,189,69,.26);
  display: none;
}

.modal { position: fixed; inset: 0; z-index: 100; display: none; }
.modal.is-open { display: block; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(6,12,9,.64); backdrop-filter: blur(9px); }
.modal-dialog {
  position: relative; z-index: 1; width: min(620px, calc(100% - 30px)); max-height: calc(100vh - 40px); overflow: auto;
  margin: 20px auto; padding: 38px; border-radius: 28px; background: var(--surface); box-shadow: 0 30px 90px rgba(0,0,0,.25);
}
.modal-dialog h2 { font-size: 38px; line-height: 1.05; letter-spacing: -.04em; margin: 0; }
.modal-intro { color: var(--muted); }
.modal-close { position: absolute; right: 18px; top: 14px; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: #fff; font-size: 28px; line-height: 1; }
form { display: grid; gap: 15px; margin-top: 28px; }
label { display: grid; gap: 7px; font-weight: 750; font-size: 13px; }
input {
  width: 100%; min-height: 50px; padding: 0 15px; border-radius: 14px; border: 1px solid var(--line); background: #fbfcf9; outline: none;
}
input:focus { border-color: var(--brand-blue); box-shadow: 0 0 0 3px rgba(15,156,209,.12); }
input.invalid { border-color: #b83a3a; }
.form-note { margin: 0; color: var(--muted); font-size: 12px; }
.form-status { min-height: 22px; margin: 0; font-weight: 750; font-size: 13px; }

.toast {
  position: fixed; left: 50%; bottom: 26px; z-index: 120; transform: translate(-50%, 120px);
  max-width: min(520px, calc(100% - 30px)); padding: 14px 18px; border-radius: 16px; background: linear-gradient(135deg, var(--brand-indigo), var(--brand-blue)); color: #fff; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: .3s ease;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .section { padding: 86px 0; }
  .header-cta { display: none; }
  .menu-toggle { display: block; margin-left: auto; }
  .main-nav {
    position: absolute; left: 20px; right: 20px; top: 72px; display: none; flex-direction: column; align-items: stretch; gap: 0;
    padding: 12px; border-radius: 18px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 12px; }
  .hero-grid, .split, .result-grid, .speaker-card, .pay-card { grid-template-columns: 1fr; }
  .hero-grid { gap: 30px; }
  .hero-visual { min-height: 480px; }
  .split .section-heading { margin-bottom: 24px; }
  .result-grid { gap: 48px; }
  .pay-actions { justify-content: flex-start; }
  .floating-cta { display: block; }
}

@media (max-width: 720px) {
  :root { --container: min(100% - 24px, 1180px); --radius: 22px; }
  .section { padding: 68px 0; }
  .hero { padding-top: 126px; }
  .hero-grid { min-height: auto; }
  .hero h1 { font-size: clamp(48px, 14vw, 70px); }
  .hero-lead { font-size: 19px; }
  .hero-actions .button { width: 100%; }
  .hero-visual { min-height: 410px; }
  .orb-one { width: 310px; height: 310px; right: -70px; }
  .orb-two { width: 210px; height: 210px; }
  .hero-card-main { right: 1%; width: 90%; padding: 26px; }
  .hero-card-main strong { font-size: 25px; }
  .hero-card-small { min-width: 120px; padding: 14px 16px; }
  .card-a { top: 5%; }
  .card-b { right: 1%; bottom: 2%; }
  .card-c { left: 3%; bottom: 9%; }
  .section-heading { grid-template-columns: 48px 1fr; gap: 12px; margin-bottom: 34px; }
  .section-index { width: 40px; height: 40px; font-size: 12px; }
  .program-grid { grid-template-columns: 1fr; }
  .program-card { min-height: 290px; padding: 26px; }
  .program-card h3 { margin-top: 42px; }
  .speaker-copy { padding: 30px; }
  .speaker-copy h3 { font-size: 28px; }
  .speaker-image-wrap { padding: 12px; }
  .trust-image { padding: 16px; border-radius: 20px; }
  .pay-card { padding: 30px; }
  .pay-actions .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .contact-icons { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .modal-dialog { padding: 30px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Tanu AI multicolor brand accents */
#about .section-index { color: var(--brand-blue); border-color: rgba(15,156,209,.22); }
#program .section-index { color: var(--brand-indigo); border-color: rgba(57,63,161,.22); }
#speaker .section-index { color: var(--brand-red); border-color: rgba(235,87,83,.22); }
#trust .section-index { color: var(--brand-green); border-color: rgba(47,189,69,.22); }
#about .feature-list article:nth-child(1) span { color: var(--brand-blue); }
#about .feature-list article:nth-child(2) span { color: var(--brand-indigo); }
#about .feature-list article:nth-child(3) span { color: var(--brand-green); }
#about .feature-list article:nth-child(4) span { color: var(--brand-red); }