:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1f24;
  --muted: #6b6f78;
  --border: #e6e3dc;
  --accent: #0f7b6c;
  --accent-soft: #e3f2ef;
  --code-bg: #f3f1ec;
  --radius: 14px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --surface: #171a20;
    --text: #e6e8ec;
    --muted: #9aa0ab;
    --border: #262a32;
    --accent: #3cc2ad;
    --accent-soft: #15302c;
    --code-bg: #1d2128;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.7 Georgia, "Times New Roman", serif;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { border-bottom: 1px solid var(--border); background: var(--surface); }
.site-header .wrap { display: flex; align-items: center; gap: 18px; padding-top: 16px; padding-bottom: 16px; flex-wrap: wrap; }
.logo {
  display: flex; align-items: center; gap: 10px;
  font: 700 20px/1 ui-monospace, "Cascadia Mono", Consolas, monospace;
  color: var(--text); text-decoration: none; margin-right: auto;
}
.logo img { width: 30px; height: 30px; }
.nav { display: flex; gap: 18px; font: 15px/1 system-ui, -apple-system, "Segoe UI", sans-serif; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

/* Hero */
.hero { padding: 48px 0 16px; }
.hero h1 { font-size: 34px; line-height: 1.2; margin: 0 0 12px; }
.hero p { color: var(--muted); font-size: 18px; margin: 0; }

/* Post list */
.section-title {
  font: 600 13px/1 system-ui, sans-serif; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted); margin: 40px 0 8px;
}
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { padding: 22px 0; border-bottom: 1px solid var(--border); }
.post-list li:last-child { border-bottom: 0; }
.post-list a.title { font-size: 22px; font-weight: 700; color: var(--text); text-decoration: none; }
.post-list a.title:hover { color: var(--accent); }
.post-list p { margin: 6px 0 0; color: var(--muted); }
.meta { font: 14px/1.4 system-ui, sans-serif; color: var(--muted); }
.tag {
  display: inline-block; font: 12px/1 system-ui, sans-serif; padding: 4px 8px; margin-right: 6px;
  border-radius: 999px; background: var(--accent-soft); color: var(--accent);
}

/* Article */
article { padding: 40px 0 24px; }
article h1 { font-size: 32px; line-height: 1.25; margin: 8px 0 12px; }
article h2 { font-size: 23px; margin: 36px 0 10px; }
article figure { margin: 28px 0; }
article figure img { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
article figcaption { font: 14px/1.5 system-ui, sans-serif; color: var(--muted); margin-top: 8px; text-align: center; }
code, pre { font: 14.5px/1.6 ui-monospace, "Cascadia Mono", Consolas, monospace; }
code { background: var(--code-bg); padding: 2px 6px; border-radius: 6px; }
pre { background: var(--code-bg); padding: 16px 18px; border-radius: var(--radius); overflow-x: auto; border: 1px solid var(--border); }
pre code { background: none; padding: 0; }
blockquote { margin: 24px 0; padding: 4px 20px; border-left: 3px solid var(--accent); color: var(--muted); }
.note {
  background: var(--accent-soft); border-radius: var(--radius); padding: 14px 18px; margin: 24px 0;
  font: 15.5px/1.6 system-ui, sans-serif;
}
.post-nav { display: flex; justify-content: space-between; gap: 16px; margin: 32px 0 0; font: 15px/1.5 system-ui, sans-serif; }

/* Cards (projects) */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin: 16px 0 0; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
  font: 15.5px/1.55 system-ui, sans-serif;
}
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); }
.card.placeholder { border-style: dashed; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 56px; }
.site-footer .wrap { padding-top: 20px; padding-bottom: 32px; font: 14px/1.6 system-ui, sans-serif; color: var(--muted); }

@media (max-width: 560px) {
  body { font-size: 16.5px; }
  .hero h1 { font-size: 28px; }
  article h1 { font-size: 26px; }
}

/* Personal cabinet login */
.login { max-width: 380px; margin: 0 auto; padding: 56px 0 72px; }
.login h1 { font-size: 30px; margin: 0 0 8px; }
.login-note { color: var(--muted); margin: 0 0 24px; }
.login-form { display: grid; gap: 10px; font: 15px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif; }
.login-form input {
  font: inherit; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text);
}
.login-form input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.login-form button {
  font: 600 15px/1 system-ui, sans-serif; padding: 13px; border: 0; border-radius: 10px;
  background: var(--accent); color: #fff; cursor: pointer; margin-top: 6px;
}
.login-form button:disabled { opacity: .6; cursor: progress; }
.login-error { color: #c0392b; margin: 4px 0 0; }