:root {
  --orange: #ff5a1f;
  --orange-soft: #ff7a43;
  --white: #fcfcfc;
  --ink: #0f1115;
  --muted: #5b6370;
  --line: #eef0f2;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--white);
  color: var(--ink);
  font-family: "VAG Rounded Bold", "VAG Rounded Std", "VAG Rounded",
    "Arial Rounded MT Bold", system-ui, -apple-system, sans-serif;
  font-weight: 700;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.brand-mark {
  color: var(--orange);
  font-size: 22px;
}

.nav-links {
  display: flex;
  gap: 32px;
  font-size: 15px;
  color: var(--muted);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 20px;
  border-radius: 2px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.08s ease, background 0.15s ease;
  border: 1px solid transparent;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--orange);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--orange-soft);
}

.btn-ghost {
  color: var(--ink);
  border-color: var(--line);
  background: var(--white);
}

.btn-ghost:hover {
  border-color: var(--ink);
}

.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 40px 160px;
}

.hero-inner {
  max-width: 760px;
}

.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: center;
}

.mobius {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.0;
  color: var(--ink);
  margin: 0;
  white-space: pre;
  letter-spacing: 0;
  user-select: none;
}

.mobius .m-hi {
  color: var(--orange);
  font-weight: 700;
}

@media (max-width: 900px) {
  .hero-split {
    grid-template-columns: 1fr;
  }
  .mobius {
    display: none;
  }
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 600;
  color: var(--orange);
  margin: 0 0 20px;
}

h1 {
  font-size: clamp(44px, 7vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0 0 24px;
}

.accent {
  color: var(--orange);
}

.lede {
  font-size: 20px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0 0 36px;
  max-width: 560px;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 40px 48px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
}

.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 80px 40px 120px;
}

.prose h1 {
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 8px 0 32px;
}

.prose h2 {
  font-size: 24px;
  font-style: italic;
  letter-spacing: -0.01em;
  margin: 44px 0 12px;
  color: var(--ink);
}

.prose .semester-note {
  margin: -4px 0 10px;
  color: var(--muted);
  font-size: 15px;
}

.prose p a:not(.discord-btn) {
  color: var(--orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.discord-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: #5865f2;
  color: #ffffff;
  border-radius: 2px;
  font-weight: 700;
  font-size: 16px;
  transition: background 0.15s ease, transform 0.08s ease;
}

.discord-btn:hover {
  background: #4752c4;
}

.discord-btn:active {
  transform: translateY(1px);
}

.prose p {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-weight: 400;
}

.prose ul.topics {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-weight: 400;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  padding-left: 20px;
  margin: 0 0 18px;
}

.prose ul.topics li {
  margin-bottom: 6px;
}

.prose ul.topics li::marker {
  color: var(--orange);
}

.prose p strong {
  font-weight: 700;
  color: var(--ink);
}

.prose p em {
  font-style: italic;
  color: var(--orange);
}

.prose p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0 0 18px;
}

@media (max-width: 640px) {
  .prose {
    padding: 48px 22px 80px;
  }
  .nav {
    padding: 18px 22px;
  }
  .nav-links {
    display: none;
  }
  .hero {
    padding: 60px 22px 100px;
  }
  footer {
    padding: 24px 22px 36px;
  }
}