:root {
  --bg: #e9f4f1;
  --bg-deep: #d9ece8;
  --ink: #102325;
  --muted: #2d5553;
  --panel: #f4fbf9;
  --edge: #2a7a70;
  --accent: #007f73;
  --link: #005f8f;
  --path-bg: #f0f7f5;
  --path-ink: #1b2c2d;
  --path-accent: #0c4aa2;
  --shadow: 0 12px 24px rgba(8, 56, 56, 0.12);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Calibri, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 78% 14%, rgba(0, 127, 115, 0.12), transparent 36%),
    linear-gradient(160deg, var(--bg), var(--bg-deep));
  line-height: 1.5;
  min-height: 100vh;
}

.page-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 84% 74%, rgba(0, 127, 115, 0.12), transparent 34%);
  z-index: -1;
}

.hero,
main,
footer {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.hero {
  padding: 3.4rem 0 1.6rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: #ffffff;
  color: #000;
  padding: 0.5rem 0.75rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.brand-bar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
  margin-bottom: 0.65rem;
}

.exeter-logo {
  width: min(250px, 46vw);
  height: auto;
}

h1,
h2,
h3 {
  line-height: 1.15;
}

h1 {
  margin: 0.35rem 0 0.55rem;
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
}

h2 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
}

.hero-copy,
.section-head p,
p {
  color: color-mix(in oklab, var(--muted), white 14%);
}

main {
  display: grid;
  gap: 1rem;
  padding-bottom: 2.2rem;
}

.panel {
  background: color-mix(in oklab, var(--panel), white 8%);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  padding: clamp(1rem, 2vw, 1.25rem);
  box-shadow: var(--shadow);
}

.pathway-grid {
  display: grid;
  gap: 0.8rem;
}

.prereq-toggle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.55rem;
  align-items: start;
  margin: 0.3rem 0 0.9rem;
  color: var(--path-ink);
}

.prereq-toggle input {
  margin-top: 0.25rem;
}

.pathway-matrix {
  border: 2px solid #6b8cc1;
  border-radius: 12px;
  background: var(--path-bg);
  color: var(--path-ink);
  padding: 1rem;
}

.matrix-title {
  margin: 0;
  color: var(--path-accent);
  font-size: 1.3rem;
}

.matrix-summary,
.path-hint {
  margin: 0.45rem 0 0.7rem;
  color: var(--path-ink);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.level-card {
  border: 1px solid color-mix(in oklab, var(--path-accent), white 55%);
  border-radius: 10px;
  background: color-mix(in oklab, var(--path-bg), white 10%);
  padding: 0.8rem;
}

.level-title {
  margin: 0;
  color: var(--path-accent);
}

.level-focus,
.level-includes {
  margin: 0.45rem 0;
  color: var(--path-ink);
}

.level-course-list {
  margin: 0 0 0.75rem;
  padding-left: 1.1rem;
}

.level-course-list li {
  margin-bottom: 0.2rem;
}

.path-actions {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 0.35rem;
  gap: 0.5rem;
}

.path-hint {
  margin: 0.45rem 0 0;
  font-size: 0.9rem;
}

.selection-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

#selectionText {
  width: 100%;
  background: #ffffff;
  color: #112425;
  border-radius: 10px;
  border: 1px solid var(--edge);
  padding: 0.75rem;
  font: 0.98rem/1.45 Calibri, "Segoe UI", Arial, sans-serif;
}

.action-row {
  margin-top: 0.7rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
}

.btn {
  display: inline-block;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #ffffff;
  padding: 0.58rem 1rem;
  font-weight: 700;
  cursor: pointer;
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid color-mix(in oklab, var(--edge), black 10%);
}

.small-btn {
  font-size: 0.9rem;
  padding: 0.4rem 0.8rem;
}

.copy-status {
  margin: 0;
  font-weight: 700;
  color: #00635c;
}

a {
  color: var(--link);
}

footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  padding: 0 0 1.8rem;
  flex-wrap: wrap;
}

footer a {
  color: var(--accent);
}

@media (max-width: 700px) {
  .hero {
    padding-top: 2.5rem;
  }

  .brand-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .level-grid {
    grid-template-columns: 1fr;
  }
}