:root {
  --blue: #24408f;
  --blue-dark: #1c3479;
  --yellow: #ffc817;
  --yellow-light: #fff6cf;
  --text: #505a6b;
  --white: #ffffff;
  --light: #f7f9fc;
  --border: #e8ecf3;
}


/* =========================
   GENERAL
========================= */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

a {
  color: inherit;
}


/* =========================
   NAVIGATION
========================= */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;

  background: rgba(255, 255, 255, 0.97);

  border-bottom: 1px solid var(--border);

  backdrop-filter: blur(12px);
}

.nav-container {
  width: min(1160px, calc(100% - 40px));
  min-height: 86px;

  margin: 0 auto;

  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;

  color: var(--blue);

  text-decoration: none;

  font-size: 23px;
  font-weight: 800;
}

.logo {
  width: 55px;
  height: 55px;

  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--blue);

  text-decoration: none;

  font-size: 15px;
  font-weight: 700;
}

.nav-button {
  padding: 12px 21px;

  border-radius: 10px;

  background: var(--blue);

  color: white !important;
}

.nav-button:hover {
  background: var(--blue-dark);
}


/* =========================
   HERO
========================= */

.hero {
  padding: 95px 20px 90px;

  text-align: center;

  background:
    radial-gradient(
      circle at 88% 20%,
      rgba(255, 200, 23, 0.18),
      transparent 30%
    ),
    linear-gradient(
      180deg,
      #f5f9ff 0%,
      #ffffff 100%
    );
}

.hero-container {
  width: min(900px, 100%);

  margin: 0 auto;
}

.eyebrow {
  display: inline-block;

  margin: 0 0 20px;

  padding: 8px 16px;

  border-radius: 30px;

  background: var(--yellow-light);

  color: var(--blue);

  font-size: 13px;

  font-weight: 800;

  letter-spacing: 1.5px;
}

.hero h1 {
  max-width: 900px;

  margin: 0 auto;

  color: var(--blue);

  font-size: clamp(43px, 6.5vw, 74px);

  line-height: 1.04;

  letter-spacing: -2.5px;

  font-weight: 800;
}

.hero h1 span {
  display: block;

  margin-top: 10px;

  color: var(--yellow);
}

.hero-subtitle {
  max-width: 680px;

  margin: 25px auto 0;

  color: var(--text);

  font-size: 19px;

  line-height: 1.7;
}


/* =========================
   ARTICLE
========================= */

.article-wrapper {
  padding: 85px 20px 100px;

  background: white;
}

.article {
  width: min(820px, 100%);

  margin: 0 auto;
}

.article p {
  margin: 0 0 28px;

  color: var(--text);

  font-size: 18px;

  line-height: 1.9;
}

.article ul {
  margin: 10px 0 35px;

  padding-left: 28px;
}

.article li {
  margin-bottom: 23px;

  color: var(--text);

  font-size: 18px;

  line-height: 1.85;
}

.article li::marker {
  color: var(--yellow);

  font-size: 1.3em;
}


/* =========================
   RESEARCH LINKS
========================= */

.article a:not(.cta-button) {
  color: var(--blue);

  font-weight: 700;

  text-decoration: underline;

  text-decoration-color: var(--yellow);

  text-decoration-thickness: 2px;

  text-underline-offset: 4px;
}


/* =========================
   JOIN SECTION
========================= */

.article-cta {
  margin-top: 75px;

  padding: 55px 35px;

  border-radius: 24px;

  background: var(--yellow);

  text-align: center;
}

.article-cta h2 {
  margin: 0;

  color: var(--blue);

  font-size: clamp(34px, 5vw, 50px);

  line-height: 1.1;
}

.article-cta p {
  margin: 15px 0 5px;

  color: var(--blue-dark);

  font-size: 18px;
}

.cta-button {
  display: inline-block;

  margin-top: 15px;

  padding: 15px 28px;

  border-radius: 10px;

  background: var(--blue);

  color: white !important;

  text-decoration: none !important;

  font-size: 16px;

  font-weight: 800;

  transition: transform 0.2s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
}


/* =========================
   FOOTER
========================= */

.footer {
  padding: 50px 20px 30px;

  background: var(--blue);

  color: white;
}

.footer-container {
  width: min(1100px, 100%);

  margin: 0 auto;

  text-align: center;
}

.footer-brand {
  display: flex;

  align-items: center;

  justify-content: center;

  gap: 12px;

  font-size: 21px;

  font-weight: 800;
}

.footer-brand img {
  width: 50px;
  height: 50px;

  object-fit: contain;
}

.footer p {
  color: rgba(255, 255, 255, 0.75);

  font-size: 14px;
}

.copyright {
  margin-top: 25px;

  padding-top: 20px;

  border-top: 1px solid rgba(255, 255, 255, 0.15);
}


/* =========================
   MOBILE
========================= */

@media (max-width: 700px) {

  .nav-container {
    width: calc(100% - 28px);

    min-height: 74px;
  }

  .logo {
    width: 47px;
    height: 47px;
  }

  .brand {
    font-size: 18px;
  }

  .nav-links a:first-child {
    display: none;
  }

  .nav-button {
    padding: 10px 14px;

    font-size: 13px !important;
  }

  .hero {
    padding: 65px 20px 70px;
  }

  .hero h1 {
    font-size: clamp(39px, 11vw, 58px);

    letter-spacing: -1.5px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .article-wrapper {
    padding: 55px 20px 75px;
  }

  .article p,
  .article li {
    font-size: 17px;

    line-height: 1.8;
  }

  .article-cta {
    padding: 45px 22px;
  }

}