@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  --bg: #fff;
  --ink: #1a1a1a;
  --ink-soft: #6f6f6f;
  --hairline: #e6e6e6;
  --chip-bg: #f0f0f0;
  --chip-ink: #565656;

  --accent: #1e3a8a;
  --accent-dark: #14275c;

  --content-width: 700px;
  --nav-h: 60px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* top bar */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.75rem;
  background: var(--bg);
  border-bottom: 1px solid var(--hairline);
  z-index: 50;
}

.topbar .mark {
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.topbar .tabs {
  list-style: none;
  display: flex;
  gap: 1.75rem;
}

.topbar .tabs a {
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-decoration: none;
}

.topbar .tabs a:hover,
.topbar .tabs a[aria-current="page"] {
  color: var(--accent);
}

.menu-btn {
  display: none;
  background: none;
  border: 0;
  color: var(--ink);
}

@media (max-width: 620px) {
  .menu-btn { display: block; }
  .topbar .tabs {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--hairline);
    padding: 1.25rem 1.75rem;
  }
  .topbar .tabs.is-open { display: flex; }
}

/* page shell */
main {
  padding-top: var(--nav-h);
}

.block {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 4rem 1.75rem;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  letter-spacing: 0.03em;
  margin-bottom: 0.9rem;
}

h1.title {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

/* about layout */
.about-layout {
  display: flex;
  gap: 3rem;
}

.about-layout .copy { flex: 1; min-width: 0; }
.about-layout .portrait { flex: none; }

.portrait img {
  width: 132px;
  height: 132px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--hairline);
}

@media (max-width: 620px) {
  .about-layout { flex-direction: column-reverse; gap: 1.5rem; }
}

p { font-size: 0.95rem; margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

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

.stint { margin-top: 1.75rem; }
.stint h2 {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 0.75rem;
}
.stint h2.stint-small { font-size: 1.05rem; }

.reach-out {
  display: flex;
  gap: 1.25rem;
  margin-top: 1.75rem;
}
.reach-out a { font-family: var(--mono); font-size: 0.8rem; }

.chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  background: var(--chip-bg);
  color: var(--chip-ink);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  text-decoration: none;
}
.chip:hover { background: var(--hairline); }

.tbd {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* projects */
.page-header { padding: 3rem 1.75rem 1rem; }
.page-header-inner { max-width: var(--content-width); margin: 0 auto; }
.page-header h1 {
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--ink);
}
.page-header + .block { padding-top: 1.5rem; }

.project-item { padding: 1.5rem 0; border-bottom: 1px solid var(--hairline); }
.project-item:last-child { border-bottom: none; }
.project-header { display: flex; align-items: baseline; gap: 0.75rem; margin-bottom: 0.5rem; }
.project-title {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.project-title:hover { color: var(--accent); border-bottom-color: var(--accent); }
.project-title .arrow { display: inline-block; transition: transform 0.2s ease; }
.project-title:hover .arrow { transform: rotate(-45deg); }
.project-desc { font-size: 0.88rem; color: var(--ink-soft); line-height: 1.65; }

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  background: var(--chip-bg);
  color: var(--chip-ink);
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
}

@media (max-width: 620px) {
  .page-header { padding: 2rem 1.75rem 1rem; }
}