:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1e2a36;
  --muted: #5c6b77;
  --border: #d8dee4;

  /* Yale-inspired palette */
  --yale-blue: #00356b;
  --accent: #3f6fa8;
  --accent-hover: #2f5a8f;
  --accent-light: #e7eff8;
  --accent-very-light: #f3f7fb;

  --max-width: 1120px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

header {
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-bottom: 1px solid var(--accent-hover);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0;
}

.site-title {
  font-size: 1.9rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

.site-title a {
  color: #ffffff !important;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0;
  margin: 0;
}

nav a {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.95rem;
  color: #ffffff;
  opacity: 0.95;
}

nav a:hover {
  opacity: 1;
  text-decoration: underline;
}

.nav-dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 220px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(30, 42, 54, 0.14);
  padding: 0.5rem;
  z-index: 1000;
}

.dropdown-menu li {
  width: 100%;
}

.dropdown-menu a {
  display: block;
  color: var(--text);
  opacity: 1;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
}

.dropdown-menu a:hover {
  background: var(--accent-very-light);
  text-decoration: none;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
  display: block;
}

.hero {
  padding: 3.5rem 0 3rem;
  background:
    linear-gradient(135deg, rgba(63, 111, 168, 0.14), rgba(243, 247, 251, 0.98)),
    linear-gradient(to bottom, #ffffff, var(--accent-very-light));
  border-bottom: 1px solid var(--border);
}

.compact-hero {
  padding: 3rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-hover);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 3.2vw, 2.6rem);
  line-height: 1.2;
  margin: 0 0 1rem;
  color: var(--text);
}

.hero p {
  font-size: 1.1rem;
  max-width: 62ch;
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.button {
  display: inline-block;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--accent);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.button.primary {
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
}

.button.secondary:hover {
  background: var(--accent-light);
  text-decoration: none;
}

.hero-card,
.panel,
.article-card,
.note-panel,
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.hero-card,
.panel,
.note-panel,
.card {
  padding: 1.5rem;
}

.hero-card {
  border-top: 4px solid var(--accent);
}

.hero-card h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.meta-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.75rem;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--muted);
  font-size: 0.95rem;
}

main section {
  padding: 2.75rem 0;
}

.section-heading {
  font-size: 2rem;
  margin: 0 0 0.75rem;
}

.section-intro {
  color: var(--muted);
  max-width: 72ch;
  margin: 0 0 1.5rem;
}

.badges {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.badge {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 600;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.cards.three-col {
  grid-template-columns: repeat(3, 1fr);
}

.card-label,
.article-meta {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-hover);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
}

.card p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 1rem;
}

.why-publish ul,
.panel ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.cta-panel {
  background: linear-gradient(135deg, var(--surface), var(--accent-very-light));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.diamond-panel {
  border-top: 4px solid var(--accent);
}

.two-column {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  align-items: start;
}

.panel h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
}

.panel p,
.panel li {
  color: var(--muted);
}

.articles {
  display: grid;
  gap: 1rem;
}

.article-card {
  padding: 1.25rem;
}

.article-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.article-card p {
  margin: 0.35rem 0;
  color: var(--muted);
}

.small-note {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.92rem;
  color: var(--muted);
}

footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 2rem 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.95rem;
  color: var(--muted);
}

#back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  background: rgba(231, 239, 248, 0.92);
  color: var(--accent-hover);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 0.8rem 1rem;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(30, 42, 54, 0.12);
  transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

#back-to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

#back-to-top:hover {
  background: var(--accent-light);
}

@media (max-width: 900px) {
  .hero-grid,
  .badges,
  .cards,
  .cards.three-col,
  .two-column {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    margin-top: 0.5rem;
  }
}