:root {
  --nav: #232f3e; --ink: #16191f; --muted: #5f6b7a; --page: #f2f3f3;
  --surface: #fff; --line: #d5dbdb; --blue: #0972d3; --blue-hover: #033160;
  --orange: #ff9900;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
body { margin: 0; background: var(--page); color: var(--ink); font: 14px/1.5 Arial, "Helvetica Neue", sans-serif; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-hover); text-decoration: underline; }
.shell { width: min(1040px, calc(100% - 40px)); margin: 0 auto; }
.site-header { background: var(--nav); color: #fff; border-bottom: 3px solid var(--orange); }
.nav { min-height: 54px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav nav { display: flex; align-items: center; gap: 18px; }
.nav nav a { color: #fff; }
.brand { color: #fff; font-size: 18px; font-weight: 700; letter-spacing: .01em; }
.brand:hover { color: #fff; text-decoration: none; }
.brand span { color: var(--orange); }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; border: 1px solid var(--blue); border-radius: 2px; padding: 7px 16px; background: var(--blue); color: #fff; font: inherit; font-weight: 700; cursor: pointer; }
.button:hover { background: var(--blue-hover); color: #fff; text-decoration: none; }
.button.small { min-height: 32px; padding: 5px 12px; }
.button.secondary { background: #fff; border-color: #7d8998; color: var(--ink); }
.button.secondary:hover { background: #f4f4f4; color: var(--ink); }
.page-heading { padding: 40px 0 20px; }
.page-heading h1 { margin: 0 0 5px; font-size: 28px; line-height: 1.25; }
.page-heading p { margin: 0; color: var(--muted); }
.search { margin: 0 0 22px; padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 2px; }
.search label { display: block; margin-bottom: 7px; font-weight: 700; }
.search-control { display: flex; gap: 8px; }
.search-control input { flex: 1; }
input { width: 100%; min-height: 38px; border: 1px solid #7d8998; border-radius: 2px; background: #fff; padding: 7px 10px; color: var(--ink); font: inherit; }
input:focus { outline: 2px solid #539fe5; outline-offset: 1px; border-color: var(--blue); }
.post-list { background: var(--surface); border: 1px solid var(--line); border-radius: 2px; }
.post-list:empty { display: none; }
.post-card { padding: 20px 22px; border-bottom: 1px solid var(--line); }
.post-card:last-child { border-bottom: 0; }
.post-card:hover { background: #fafafa; }
.post-card h2, .post-card h3 { margin: 8px 0 6px; font-size: 19px; line-height: 1.35; }
.post-card h2 a, .post-card h3 a { color: var(--ink); }
.post-card p { max-width: 760px; margin: 0 0 10px; color: var(--muted); }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; }
.category { display: inline-flex; padding: 2px 7px; background: #e9f3fc; color: var(--blue-hover); border-radius: 2px; font-weight: 700; }
.byline { color: var(--muted); font-size: 12px; }
.load-status { min-height: 58px; padding: 18px; text-align: center; color: var(--muted); }
#post-sentinel { height: 1px; }
.hidden { display: none !important; }
.empty { padding: 52px 24px; border: 1px solid var(--line); background: #fff; text-align: center; }
.empty h2 { margin: 0 0 6px; font-size: 20px; }
.empty p { margin: 0; color: var(--muted); }
.section-head { display: flex; justify-content: space-between; align-items: baseline; margin: 28px 0 12px; border-bottom: 1px solid var(--line); }
.section-head h2 { margin: 0 0 9px; font-size: 20px; }
.section-head span { color: var(--muted); font-size: 12px; }
.footer { margin-top: 54px; padding: 25px 0 38px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.article { width: min(800px, 100%); margin: 42px auto; padding: 36px 42px; background: #fff; border: 1px solid var(--line); }
.article-header { margin-bottom: 34px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.article-header h1 { margin: 14px 0 10px; font-size: clamp(30px, 5vw, 44px); line-height: 1.15; letter-spacing: -.02em; }
.article-excerpt { color: var(--muted); font-size: 17px; }
.prose { font: 16px/1.75 Georgia, "Times New Roman", serif; }
.prose h2, .prose h3 { margin: 1.8em 0 .5em; line-height: 1.25; font-family: Arial, "Helvetica Neue", sans-serif; }
.prose img { max-width: 100%; }
.prose pre { overflow: auto; padding: 18px; background: var(--page); border: 1px solid var(--line); font: 13px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; }
.prose blockquote { margin-left: 0; padding-left: 18px; border-left: 4px solid var(--orange); color: var(--muted); }
.prose table, table { width: 100%; border-collapse: collapse; }
.prose th, .prose td, th, td { padding: 10px; border: 1px solid var(--line); text-align: left; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 34px; color: var(--muted); }
.auth-card { width: min(500px, 100%); margin: 48px auto; padding: 30px; background: #fff; border: 1px solid var(--line); }
.auth-card h1 { margin: 0 0 8px; font-size: 28px; }
.form-stack { display: grid; gap: 16px; margin-top: 24px; }
.form-stack label { display: grid; gap: 6px; font-weight: 700; }
.form-note { margin-top: 20px; color: var(--muted); }
.alert, .success { margin: 20px 0; padding: 14px 16px; border: 1px solid; border-radius: 2px; }
.alert { background: #fff0f0; border-color: #d91515; color: #7a0b0b; }
.success { background: #f2fcf3; border-color: #29ad32; }
.token { display: block; overflow-wrap: anywhere; margin-top: 10px; padding: 11px; background: #fff; border: 1px solid var(--line); }
.account-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 30px; padding: 40px 0 12px; }
.account-head h1 { margin: 0 0 5px; font-size: 28px; }
.account-head p { margin: 0; color: var(--muted); }
.link-button { border: 0; background: none; color: var(--blue); text-decoration: underline; cursor: pointer; font: inherit; }
.guide { margin: 28px 0; padding: 20px; background: #fff; border: 1px solid var(--line); }
.guide .section-head { margin-top: 0; }
.guide pre { overflow: auto; margin-bottom: 0; padding: 16px; background: var(--page); border: 1px solid var(--line); font-size: 13px; }
.danger-zone { margin: 28px 0; padding: 20px; background: #fff8e8; border: 1px solid #e0a100; }
.danger-zone h3 { margin-top: 0; }
@media (max-width: 700px) {
  .shell { width: min(100% - 24px, 1040px); }
  .nav { min-height: 50px; }
  .nav nav { gap: 10px; }
  .nav nav > a:first-child:not(:last-child) { display: none; }
  .page-heading { padding-top: 28px; }
  .search-control { display: grid; }
  .post-card { padding: 17px; }
  .article { margin: 20px auto; padding: 24px 18px; }
  .account-head { flex-direction: column; }
}