:root {
  --bg: #f6f7f5;
  --ink: #161a18;
  --muted: #58615c;
  --accent: #1d5c4a;
  --line: rgba(22, 26, 24, 0.16);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Archivo", system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 660px; margin: 0 auto; padding: 0 22px; }
a { color: var(--ink); text-decoration-color: var(--line); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

nav { padding: 26px 0 0; }
nav .wrap { display: flex; gap: 18px; flex-wrap: wrap; align-items: baseline; }
nav a {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em;
  text-decoration: none; color: var(--muted);
}
nav a.here { color: var(--accent); border-bottom: 2px solid var(--accent); }
nav a.name { color: var(--ink); margin-right: auto; font-weight: 600; }

header.hero { padding: 84px 0 30px; }
.greet {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.08em;
  color: var(--accent); min-height: 1.4em; display: block;
}
h1 {
  font-size: clamp(2.5rem, 8vw, 3.7rem); font-weight: 700;
  letter-spacing: -0.025em; line-height: 1.05; margin: 10px 0 16px;
}
.lede { font-size: 1.15rem; color: var(--muted); max-width: 32ch; }

main { padding: 26px 0 40px; }
h2 {
  font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em;
  margin: 44px 0 12px;
}
h2 .k {
  font-family: var(--mono); font-size: 12px; font-weight: 400;
  color: var(--accent); letter-spacing: 0.08em; display: block; margin-bottom: 6px;
}
p + p { margin-top: 14px; }
.muted { color: var(--muted); }

ul.index { list-style: none; padding: 0; margin: 40px 0 0; border-top: 1px solid var(--line); }
ul.index li { border-bottom: 1px solid var(--line); }
ul.index a {
  display: flex; justify-content: space-between; align-items: baseline; gap: 14px;
  padding: 18px 2px; text-decoration: none;
}
ul.index .t { font-weight: 600; }
ul.index .d { color: var(--muted); font-size: 0.95rem; text-align: right; }
ul.index a:hover .t { color: var(--accent); }

.tl { list-style: none; padding: 0; margin: 8px 0 0; }
.tl li { display: flex; gap: 18px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.tl .y { font-family: var(--mono); font-size: 13px; color: var(--muted); white-space: nowrap; min-width: 9ch; padding-top: 2px; }

.proj { margin: 30px 0; }
.proj h3 { font-size: 1.05rem; font-weight: 600; }
.proj .sub { font-family: var(--mono); font-size: 12.5px; color: var(--muted); margin: 2px 0 8px; }

footer { border-top: 1px solid var(--line); margin-top: 50px; padding: 22px 0 46px; }
footer .wrap { display: flex; gap: 16px; flex-wrap: wrap; }
footer a, footer span { font-family: var(--mono); font-size: 13px; color: var(--muted); }

.chat { border: 1px solid var(--line); background: #fff; margin-top: 18px; }
.chat .log { padding: 16px; min-height: 130px; max-height: 420px; overflow-y: auto; }
.chat .m { margin: 0 0 12px; font-size: 0.98rem; }
.chat .m.q { font-weight: 600; }
.chat .m.a { color: var(--ink); }
.chat .m.a::before { content: "answer"; display: block; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: var(--accent); }
.chat form { display: flex; border-top: 1px solid var(--line); }
.chat input {
  flex: 1; border: 0; padding: 14px 16px; font: inherit; font-size: 1rem;
  background: transparent; color: var(--ink);
}
.chat button {
  border: 0; background: var(--accent); color: #fff; font-family: var(--mono);
  font-size: 13px; padding: 0 20px; cursor: pointer;
}
.chat button:disabled { opacity: 0.5; cursor: wait; }

@media (max-width: 480px) {
  header.hero { padding-top: 56px; }
  ul.index a { flex-direction: column; gap: 4px; }
  ul.index .d { text-align: left; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }