/* ==========================================================
   Shared styles for every page on the site.
   Change a value here and all four pages update.
   ========================================================== */

/* ---------- 1. Design tokens ----------
   "Tokens" are named values reused everywhere below.
   To change the look, start here. */
:root {
  --bg: #ffffff;
  --text: #1c1c1c;        /* near-black body text */
  --muted: #5c6166;       /* secondary text: dates, captions */
  --accent: #16615b;      /* deep teal: links, small highlights */
  --line: #e6e6e3;        /* hairline dividers */

  /* Serif for headings, sans for body. Both use fonts already on
     the visitor's device, so nothing is downloaded. */
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --width: 46rem;         /* max width of the content column */
}

/* Dark mode: same token names, different values.
   The browser picks this automatically from the visitor's OS setting. */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141615;
    --text: #e9e9e6;
    --muted: #a3a8a6;
    --accent: #7cc8bb;
    --line: #2b2f2e;
  }
}

/* ---------- 2. Base ---------- */
* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
}

/* Centers the content in a readable column with a side gutter. */
.container {
  max-width: var(--width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.2;
}
h1 { font-size: 2.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.5rem; margin: 3rem 0 1rem; }
h3 { font-size: 1.1875rem; margin: 0 0 0.25rem; }

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

/* Visible outline for keyboard users (Tab key). */
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.muted { color: var(--muted); }

/* ---------- 3. Header and nav (same on every page) ---------- */
.site-header { padding: 1.5rem 0; }
.site-header .container {
  display: flex;
  flex-wrap: wrap;          /* lets nav drop below the name on phones */
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
}
.site-name {
  font-family: var(--serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.9375rem;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
}
.site-nav a:hover { color: var(--text); }
/* aria-current="page" marks the page you're on; style it as active. */
.site-nav a[aria-current="page"] {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
}

/* ---------- 4. Main content ---------- */
main { padding: 3rem 0 4rem; }

.lede {
  font-size: 1.1875rem;
  color: var(--muted);
}

/* Home page intro: text on the left, photo on the right.
   On phones the photo stacks on top (see media query below). */
.intro {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2.5rem;
  align-items: center;
}
.intro h1 { font-size: 3rem; }

.photo {
  width: 168px;
  height: 168px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--line);  /* gray circle until the photo exists */
}

/* Home page: list of links to the other pages. */
.home-links {
  list-style: none;
  padding: 0;
  margin: 3.5rem 0 0;
  border-top: 1px solid var(--line);
}
.home-links a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}
.home-links strong {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  min-width: 7rem;
}
.home-links span { color: var(--muted); flex: 1; }
.home-links a::after { content: "→"; color: var(--accent); }
.home-links a:hover strong { color: var(--accent); }

/* Projects: one entry per project, separated by hairlines. */
.projects {
  list-style: none;
  padding: 0;
  margin: 2.5rem 0 0;
  border-top: 1px solid var(--line);
}
.project {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}
.project .meta {
  color: var(--muted);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}
.project p { margin: 0.25rem 0 0.5rem; }

/* Experience: dates in a narrow left column, details on the right. */
.timeline { margin-top: 2.5rem; }
.entry {
  display: grid;
  grid-template-columns: 10.5rem 1fr;
  gap: 0.25rem 1.5rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}
.entry .dates {
  color: var(--muted);
  font-size: 0.9375rem;
  padding-top: 0.2rem;
  white-space: nowrap;   /* keep "Aug 2024 – Aug 2026" on one line */
}
.entry .title { color: var(--muted); margin: 0; }
.entry p { margin: 0.5rem 0 0; }
.highlights { margin: 0.5rem 0 0; padding-left: 1.1rem; }
.highlights li { margin-bottom: 0.35rem; }
.highlights li::marker { color: var(--accent); }

/* ---------- 5. Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* ---------- 6. Phones ----------
   Below 600px wide, collapse two-column layouts into one. */
@media (max-width: 600px) {
  h1, .intro h1 { font-size: 2.25rem; }
  .intro { grid-template-columns: 1fr; gap: 1.5rem; }
  .intro .photo { order: -1; width: 120px; height: 120px; }
  .entry { grid-template-columns: 1fr; }
  .entry .dates { padding-top: 0; }
  .home-links a { flex-wrap: wrap; }
  .home-links span { flex-basis: 100%; order: 3; }
}