/* The classic one-page portfolio. */
html { scroll-behavior: smooth; }
body {
  background: var(--bg-2);
  background-image: radial-gradient(rgba(31, 36, 48, 0.06) 1px, transparent 1px);
  background-size: 22px 22px;
  line-height: 1.6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141a2e;
    --bg-2: #10152a;
    --ink: #eef0f8;
    --ink-2: #c3c8da;
    --muted: #8c93aa;
    --line: rgba(255, 255, 255, 0.12);
    --card-solid: #1a2038;
  }
  body { background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px); }
  .chip { background: rgba(255, 255, 255, 0.08); }
  .btn.primary { background: var(--ink); color: var(--bg-2); }
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 4vw, 48px);
  background: color-mix(in srgb, var(--bg-2) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.mark {
  font-family: var(--serif);
  font-size: 26px;
  text-decoration: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--bg-2);
  font-style: italic;
}
.topbar nav { display: flex; gap: 26px; font-size: 14px; }
.topbar nav a { text-decoration: none; color: var(--ink-2); }
.topbar nav a:hover { color: var(--ink); }
.top-actions { display: flex; gap: 8px; }
.btn.ghost { background: transparent; }

main { max-width: 1120px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px); }

.hero { padding: clamp(56px, 10vw, 120px) 0 56px; }
.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(56px, 11vw, 148px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  margin: 10px 0 18px;
}
.hero h1 em { color: var(--accent); }
.hero-role { font-size: clamp(16px, 2vw, 20px); color: var(--ink-2); margin: 0 0 12px; font-weight: 500; }
.hero-intro { font-size: clamp(16px, 1.8vw, 19px); max-width: 640px; color: var(--ink-2); margin: 0 0 28px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 56px; }

.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.metric { background: var(--card-solid); padding: 22px 20px; }
.metric b { display: block; font-family: var(--serif); font-weight: 400; font-size: clamp(30px, 3.4vw, 42px); line-height: 1; margin-bottom: 8px; }
.metric span { font-size: 13px; color: var(--muted); line-height: 1.4; display: block; }

.block {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  padding: 72px 0;
  border-top: 1px solid var(--line);
}
.block-head { position: sticky; top: 96px; align-self: start; }
.block-head h2 { font-family: var(--serif); font-weight: 400; font-size: 44px; line-height: 1; margin: 0; }
.period { font-family: var(--mono); font-size: 12px; color: var(--muted); }

.exp-item { border-bottom: 1px solid var(--line); }
.exp-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 150px 1fr auto 24px;
  gap: 16px;
  align-items: baseline;
  padding: 20px 0;
}
.exp-item summary::-webkit-details-marker { display: none; }
.exp-item .org b { display: block; font-size: 18px; }
.exp-item .org em { font-style: normal; color: var(--ink-2); font-size: 14px; }
.exp-item .place { font-size: 13px; color: var(--muted); }
.exp-item .plus { font-size: 22px; color: var(--accent); transition: transform 0.25s ease; text-align: right; }
.exp-item[open] .plus { transform: rotate(45deg); }
.exp-item ul { margin: 0 0 22px 166px; padding-left: 18px; color: var(--ink-2); font-size: 15px; }
.exp-item li { margin-bottom: 6px; }
.exp-item li::marker { color: var(--accent); }

.proj { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.proj-card {
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 14px 18px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.proj-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.proj-art {
  height: 130px;
  border-radius: 12px;
  margin-bottom: 14px;
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.35), transparent 40%),
    linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #1f2430));
  display: grid;
  place-items: center;
}
.proj-art span { font-family: var(--serif); font-size: 64px; color: rgba(255, 255, 255, 0.9); font-style: italic; }
.proj-meta { display: flex; justify-content: space-between; gap: 8px; }
.proj-meta .stack { font-size: 12px; color: var(--muted); }
.proj-card h3 { margin: 6px 0 4px; font-size: 18px; }
.proj-card p { margin: 0 0 10px; color: var(--ink-2); font-size: 14px; }
.proj-card a { font-size: 13px; font-weight: 600; text-decoration: none; border-bottom: 1.5px solid var(--accent); }

.edu-list { display: grid; gap: 22px; }
.edu-item { padding-left: 18px; border-left: 4px solid var(--accent); }
.edu-item h3 { margin: 2px 0; font-size: 20px; }
.edu-item p { margin: 2px 0; }
.sub { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 40px 0 12px; font-weight: 500; }
.award-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.award-list li { display: grid; gap: 2px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.award-list .muted { font-size: 14px; }

.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.skill h3 { margin: 0 0 10px; font-size: 16px; }
.skill .chip { font-size: 13px; padding: 5px 12px; }

.contact-block { text-align: center; padding: 110px 0 90px; border-top: 1px solid var(--line); }
.contact-block h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(64px, 12vw, 150px); line-height: 0.9; margin: 8px 0 24px; letter-spacing: -0.03em; }
.email { font-size: clamp(18px, 3vw, 28px); text-decoration: none; border-bottom: 2px solid var(--accent); }
.contact-links { display: flex; gap: 24px; justify-content: center; margin-top: 22px; font-size: 14px; }
.contact-links a { color: var(--ink-2); }

.foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 24px clamp(16px, 4vw, 48px);
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 860px) {
  .topbar nav { display: none; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .block { grid-template-columns: 1fr; gap: 20px; padding: 56px 0; }
  .block-head { position: static; }
  .exp-item summary { grid-template-columns: 1fr 24px; }
  .exp-item .period { grid-column: 1; }
  .exp-item .org { grid-column: 1; }
  .exp-item .place { display: none; }
  .exp-item .plus { grid-column: 2; grid-row: 1 / span 2; }
  .exp-item ul { margin-left: 0; }
  .skills { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .top-actions .btn.primary span { display: none; }
}