:root {
  --bg: #fafaf7; --fg: #1f2328; --muted: #656d76; --accent: #2da44e;
  --card: #ffffff; --line: #d8dee4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117; --fg: #e6edf3; --muted: #8b949e; --accent: #3fb950;
    --card: #161b22; --line: #30363d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh;
  background: var(--bg); color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.7;
}
.wrap { width: min(92vw, 760px); margin: 0 auto; }

header { padding: 40px 0 0; }
.site-title { margin: 0; font-size: 1.5rem; }
.site-title a { color: inherit; text-decoration: none; }
.site-sub { margin: 4px 0 20px; color: var(--muted); }

nav.tabs {
  display: flex; gap: 4px; overflow-x: auto;
  border-bottom: 1px solid var(--line);
}
nav.tabs a {
  flex: none; padding: 10px 16px; color: var(--muted); text-decoration: none;
  border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap;
}
nav.tabs a:hover { color: var(--fg); }
nav.tabs a[aria-current="page"] {
  color: var(--fg); font-weight: 600; border-bottom-color: var(--accent);
}

main { padding: 32px 0 48px; }
h2 { margin: 0 0 16px; font-size: 1.4rem; }
h3 { margin: 0 0 6px; font-size: 1.05rem; }
p { margin: 0 0 16px; }
.muted { color: var(--muted); }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 20px; margin-bottom: 12px;
}
.card p:last-child { margin-bottom: 0; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
a.card { display: block; color: inherit; text-decoration: none; }
a.card:hover { border-color: var(--accent); }

.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li {
  display: flex; justify-content: space-between; gap: 16px;
  padding: 14px 0; border-bottom: 1px solid var(--line);
}
.post-list time { flex: none; color: var(--muted); font-variant-numeric: tabular-nums; }

.tag {
  display: inline-block; padding: 2px 10px; margin: 0 6px 6px 0;
  font-size: .85rem; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px;
}
dl.info { display: grid; grid-template-columns: 7em 1fr; gap: 10px 12px; margin: 0; }
dl.info dt { color: var(--muted); }
dl.info dd { margin: 0; }
a { color: var(--accent); }

/* 로그인 잠금 */
html.locked .wrap { display: none; }
html:not(.locked) #login { display: none; }
#login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(92vw, 360px); }
.login-card label { display: block; margin-bottom: 12px; color: var(--muted); font-size: .9rem; }
.login-card input {
  display: block; width: 100%; margin-top: 4px; padding: 10px 12px; font-size: 1rem;
  color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
}
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.login-card button {
  width: 100%; padding: 10px; font-size: 1rem; color: #fff; background: var(--accent);
  border: 0; border-radius: 8px; cursor: pointer;
}
.login-error { color: #cf222e; font-size: .9rem; margin: 0 0 12px; }
@media (prefers-color-scheme: dark) { .login-error { color: #ff7b72; } }
nav.tabs .logout {
  flex: none; margin-left: auto; padding: 10px 4px; font-size: .9rem; cursor: pointer;
  color: var(--muted); background: none; border: 0;
}
nav.tabs .logout:hover { color: var(--fg); }

footer { padding: 24px 0 40px; color: var(--muted); font-size: .9rem; border-top: 1px solid var(--line); }