/* ---------- 1. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
body,
h1,
h2,
h3,
p,
ul,
ol,
figure {
  margin: 0;
}
img {
  max-width: 100%;
  display: block;
}
/* ---------- 2. Tokens ---------- */
:root {
  --bg: #faf8f5;
  --surface: #ece7e0;
  --text: #1a1614;
  --muted: #6b635c;
  --accent: #e85d04;
  --accent-dark: #b84803;
  --accent2: #c9187e;
  --serif: "Bricolage Grotesque", Georgia, serif;
  --sans: "Inter", system-ui, sans-serif;
}
/* ---------- 3. Page layout ---------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.7;
  max-width: 740px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}
/* ---------- 4. Typography ---------- */
h1 {
  font-family: var(--serif);
  font-size: 3.5rem;
  line-height: 1.1;
  margin: 0 0 1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}
h2 {
  position: relative;
  font-family: var(--serif);
  font-size: 1.6rem;
  padding-top: 0.6rem;
  margin-top: 2.5rem;
  letter-spacing: -0.03em;
}
h2::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5rem;
  height: 3px;
  background: var(--accent);
}
p {
  margin: 0 0 1.2rem;
}
/* ---------- 5. Links ---------- */
a {
  text-decoration: none;
  color: var(--accent);
}
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
p a {
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}
p a:hover {
  border-bottom-color: var(--accent);
}
/* ---------- 6. Lists ---------- */
ul {
  list-style: none;
  padding-left: 0;
}
li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.4rem;
}
li a {
  color: var(--accent);
  font-weight: 500;
}
li a:hover {
  color: var(--accent-dark);
}
li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent);
}
li a::after {
  content: "→";
  opacity: 0;
  display: inline-block;
  transition:
    opacity 0.15s ease,
    margin-left 0.15s ease;
}
li a:hover::after {
  opacity: 1;
  margin-left: 0.6rem;
}
/* ---------- 7. Nav ---------- */
nav {
  display: flex;
  gap: 2rem;
  margin-bottom: 4rem;
  border-bottom: 1px solid var(--surface);
  padding-bottom: 1rem;
}
nav a {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.15s ease;
}
nav a.active {
  color: var(--text);
  border-bottom: 2px solid var(--accent);
}
nav a:hover {
  color: var(--accent);
}
/* ---------- 8. Footer ---------- */
footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--surface);
  color: var(--muted);
  font-size: 0.9rem;
}
footer p {
  margin-bottom: 0.2rem;
}
/* ---- classes ---- */
.tagline {
  font-family: var(--serif);
  font-size: 1.9rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.course-meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: -0.4rem;
}
.links {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
}
/* GitHub / Email */
.links a {
  font-weight: 500;
}
.links a:hover {
  color: var(--accent-dark);
}
/* --- cards --- */
.cards {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.card {
  background: var(--surface);
  padding: 1.5rem 1.75rem 1.75rem;
  border-radius: 4px;
}
.card h2 {
  margin-top: 0;
  padding-top: 0;
  font-size: 1.35rem;
  /* color: var(--accent); */
}
.card h2::before {
  display: none;
}
.card-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
}
.card-link {
  display: inline-block;
  font-weight: 500;
  margin-top: 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}
.card-link:hover {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
}

/* ---------- Mobile ---------- */
@media (max-width: 600px) {
  body {
    padding: 2rem 1.25rem;
    font-size: 17px;
  }
  h1 {
    font-size: 2.4rem;
  }
  nav {
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem 1.25rem;
    margin-bottom: 2.5rem;
  }
  li a {
    padding: 0.6rem 0.3rem;
  }
  nav a {
    padding: 0.4rem 0;
  }
  .card {
    padding: 1.25rem 1.25rem 1.5rem;
  }
}