:root {
  --ink: #1a1a1a;
  --text: #55595c;
  --muted: rgba(0, 0, 0, 0.3);
  --rule: rgba(0, 0, 0, 0.1);
  --bg: #fff;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Nunito Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17.6px;
  font-weight: 200;
  line-height: 1.5;
  letter-spacing: 1px;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 16px; }

a { color: var(--ink); text-decoration: none; font-weight: 300; }
a:hover { text-decoration: underline; }

strong, b { font-weight: 700; color: var(--ink); }

h1, h2, h3 { color: var(--ink); font-weight: 600; text-transform: uppercase; }
h1 { font-size: 32px; letter-spacing: 3px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 20px; letter-spacing: 2px; margin: 32px 0 12px; }
h3 { font-size: 16px; letter-spacing: 1.5px; margin: 24px 0 8px; }
p { margin: 0 0 16px; }

/* ---- top navigation ---- */
.topnav {
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  padding: 24px 0;
  margin-bottom: 24px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.topnav__inner { display: flex; align-items: center; flex-wrap: wrap; gap: 0 32px; }
.brand { color: var(--ink); font-size: 20.8px; font-weight: 600; letter-spacing: 1px; padding: 5px 0; }
.brand:hover { text-decoration: none; }
.menu, .icons { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; }
.menu a, .icons a { display: block; color: var(--muted); font-size: 14.7px; font-weight: 600; padding: 11px 12px; }
.menu a:hover, .icons a:hover, .menu a.active { color: var(--ink); text-decoration: none; }
.icons { margin-left: auto; }
.icons a { font-size: 15px; padding: 11px 10px; }
.menu-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--rule); border-radius: 4px; color: var(--text); font-size: 18px; padding: 4px 10px; cursor: pointer; }

/* ---- welcome page ---- */
.portrait { float: left; width: 150px; height: 150px; object-fit: cover; margin: 6px 20px 12px 0; }
.clearfix::after { content: ""; display: table; clear: both; }

/* ---- lists (publications, resume) ---- */
ol, ul { padding-left: 1.4em; margin: 0 0 16px; }
li { margin-bottom: 10px; }
.meta { color: #777; }
small { font-size: 14px; }

/* ---- resume tabs ---- */
.tabs { list-style: none; display: flex; flex-wrap: wrap; padding: 0; margin: 16px 0 0; border-bottom: 1px solid var(--rule); }
.tabs li { margin: 0 0 -1px; }
.tabs a { display: block; padding: 8px 16px; color: var(--text); font-weight: 200; border: 1px solid transparent; border-radius: 4px 4px 0 0; }
.tabs a:hover { text-decoration: none; border-color: #e9ecef #e9ecef var(--rule); }
.tabs a.active { border-color: var(--rule) var(--rule) var(--bg); background: var(--bg); }
.tab-pane { padding-top: 16px; }
.tab-pane h2:first-child { margin-top: 0; }

/* ---- featured project ---- */
.feature { border: 1px solid var(--rule); border-radius: 6px; padding: 20px 24px 8px; margin: 24px 0 32px; }
.feature h2 { margin-top: 4px; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; color: #b45309; }
.demo { display: block; width: 100%; height: auto; border-radius: 4px; margin: 4px 0 16px; background: #111; }
@media (max-width: 700px) { .feature { padding: 16px 16px 4px; } }

/* ---- blog ---- */
.post-list { list-style: none; padding: 0; }
.post-list li { margin-bottom: 18px; }
.post-date { display: inline-block; min-width: 64px; color: #777; }
.post-excerpt { color: #777; font-size: 15.5px; margin: 2px 0 0 68px; }
.post-meta { color: #777; margin: 0 0 24px; }
.post-tag { display: inline-block; font-size: 13px; border: 1px solid var(--rule); border-radius: 12px; padding: 0 9px; margin-right: 4px; }
.post-body img { max-width: 100%; height: auto; }
.post-body pre { background: #f6f8fa; border-radius: 4px; padding: 12px 14px; overflow-x: auto; font-size: 14px; letter-spacing: 0; }
.post-body code { font-size: 0.9em; letter-spacing: 0; }
.post-body blockquote { margin: 0 0 16px; padding-left: 16px; border-left: 3px solid var(--rule); color: #777; }
.post-nav { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--rule); margin-top: 32px; padding-top: 16px; font-size: 15px; }
@media (max-width: 700px) { .post-excerpt { margin-left: 0; } .post-nav { flex-direction: column; } }

.btn { display: inline-block; background: var(--ink); color: #fff; font-weight: 600; font-size: 15px; letter-spacing: 1px; padding: 8px 16px; border-radius: 4px; margin: 0 12px 12px 0; }
.btn:hover { background: #333; text-decoration: none; }

/* ---- footer ---- */
footer { border-top: 1px solid var(--rule); margin: 32px 0 40px; padding-top: 19px; color: #777; }

@media (max-width: 700px) {
  body { font-size: 16px; }
  h1 { font-size: 26px; }
  .menu-toggle { display: block; }
  .menu, .icons { display: none; width: 100%; }
  .open .menu, .open .icons { display: flex; }
  .menu { flex-direction: column; margin-top: 12px; }
  .icons { margin-left: 0; }
  .menu a { padding: 8px 0; }
  .icons a { padding: 8px 16px 8px 0; }
  .portrait { width: 110px; height: 110px; }
}