/* Ubertech — shared styles for the landing page and blog */

:root {
  --paper: #FFFFFF;
  --wash: #EBF4FB;
  --ink: #0F2D52;
  --heading: #1D4F91;
  --subhead: #4F7FB4;
  --body: #22364F;
  --muted: #56677D;
  --line: #D6E3EF;
  --channel: #1D4F91;
  --signal: #DDF1EA;
  --signal-ink: #135C48;
  --accent: #2E9E7E;
  --code-bg: #EBF4FB;
  --band-bg: #0F2D52;
  --band-fg: #FFFFFF;
  --band-muted: #B9CCE2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0B1A2E;
    --wash: #10243D;
    --ink: #EAF2FA;
    --heading: #8DB8E8;
    --subhead: #7FA6CF;
    --body: #D3E0EE;
    --muted: #9DB1C8;
    --line: #213955;
    --channel: #8DB8E8;
    --signal: #123A33;
    --signal-ink: #8FDCC2;
    --accent: #5CC7A5;
    --code-bg: #10243D;
    --band-bg: #10243D;
    --band-fg: #EAF2FA;
    --band-muted: #9DB1C8;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Lexend", system-ui, -apple-system, sans-serif;
  font-weight: 300;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--body);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-underline-offset: 4px; }
a:focus-visible {
  outline: 2px solid var(--channel);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1.5rem; }
.narrow { max-width: 44rem; }

h1, h2, h3 {
  font-family: "Lexend", system-ui, sans-serif;
  line-height: 1.12;
  color: var(--heading);
}
strong { font-weight: 600; color: var(--ink); }

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-family: "Lexend", system-ui, sans-serif;
  font-weight: 600;
  font-size: 1.4rem;
  color: var(--ink);
}
.wordmark svg { width: 28px; height: 28px; flex: none; }
.site-nav a {
  text-decoration: none;
  margin-left: 1.75rem;
  color: var(--ink);
  font-weight: 400;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; }

/* Top band: header and hero on a pale-blue wash */
.top { background: var(--wash); }
.top::after {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(135deg, var(--accent) 0 2px, transparent 2px 10px);
  opacity: 0.55;
}

/* Hero */
.hero { padding: 4.5rem 0 5rem; }
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
  max-width: 17ch;
}
.lede {
  font-size: 1.3rem;
  color: var(--body);
  max-width: 36rem;
  margin: 0 0 2.25rem;
}
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; }
.button {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--ink);
  text-decoration: none;
  font-weight: 500;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
}
.button:hover { background: var(--heading); border-color: var(--heading); }
.button.outline { background: transparent; color: var(--ink); }
.button.outline:hover { background: var(--ink); color: var(--paper); }
.text-link { font-weight: 400; color: var(--ink); }

/* Sections */
.section { padding: 5rem 0 0; }
.section h2 {
  font-weight: 700;
  color: var(--subhead);
  font-size: clamp(1.9rem, 3.4vw, 2.5rem);
  margin: 0 0 2rem;
}

.row {
  display: grid;
  grid-template-columns: 17rem 1fr;
  gap: 2.5rem;
  padding: 2rem 0;
  border-top: 1px solid var(--line);
}
.row h3 { font-weight: 600; color: var(--ink); font-size: 1.45rem; margin: 0 0 0.35rem; }
.row p { margin: 0 0 0.9rem; max-width: 40rem; }
.row p:last-child { margin-bottom: 0; }
.row ul { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.row li { margin: 0.2rem 0; }
.row li::marker { color: var(--accent); }

.badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  color: var(--signal-ink);
  background: var(--signal);
}
.badge.outline { background: transparent; color: var(--heading); border: 1.5px solid var(--heading); }

/* Post list (landing page and blog index) */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}
.post-list time { color: var(--muted); font-size: 0.95rem; padding-top: 0.2rem; }
.post-list a {
  font-family: "Lexend", system-ui, sans-serif;
  font-weight: 600;
  font-size: 1.3rem;
  text-decoration: none;
}
.post-list a { color: var(--ink); }
.post-list a:hover { text-decoration: underline; color: var(--heading); }
.post-list p { margin: 0.25rem 0 0; color: var(--muted); }
.more { margin: 1.5rem 0 0; font-weight: 500; }

/* Article (blog posts) */
.article { padding: 3.5rem 0 0; }
.article .meta { color: var(--accent); font-weight: 500; margin: 0 0 0.75rem; }
.article h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 700; margin: 0 0 1.5rem; }
.article h2 { font-size: 1.7rem; font-weight: 600; color: var(--subhead); margin: 2.5rem 0 0.75rem; }
.article p, .article li { max-width: 40rem; }
.article li { margin: 0.3rem 0; }
.article code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}
.article pre {
  background: var(--code-bg);
  padding: 1rem 1.25rem;
  border-radius: 6px;
  overflow-x: auto;
  line-height: 1.5;
}
.article pre code { background: none; padding: 0; }
.back { display: inline-block; margin-top: 3rem; font-weight: 500; }

/* Contact band and footer */
.contact {
  margin-top: 6rem;
  background: var(--band-bg);
  color: var(--band-fg);
  padding: 5rem 0;
}
.contact h2 { font-size: clamp(2.2rem, 5vw, 3.5rem); font-weight: 700; margin: 0 0 1rem; color: var(--band-fg); }
.contact p { color: var(--band-muted); max-width: 34rem; margin: 0 0 2rem; font-size: 1.15rem; }
.contact .email {
  font-family: "Lexend", system-ui, sans-serif;
  font-weight: 600;
  font-size: clamp(1.05rem, 3.2vw, 2rem);
  color: var(--band-fg);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 3px;
  text-underline-offset: 8px;
  overflow-wrap: anywhere;
}
.contact .email:hover { color: #9FE3CB; }
.contact .email:focus-visible { outline-color: #9FE3CB; }

.site-footer {
  background: var(--band-bg);
  color: var(--band-muted);
  font-size: 0.9rem;
  padding: 0 0 2.5rem;
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.5rem;
}
.plain-footer { margin-top: 5rem; padding: 1.5rem 0 2.5rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }

/* Small screens */
@media (max-width: 760px) {
  .site-nav a { margin-left: 1rem; }
  .hero { padding: 2.5rem 0 3.5rem; }
  .row { grid-template-columns: 1fr; gap: 0.75rem; }
  .post-list li { grid-template-columns: 1fr; gap: 0.1rem; }
  .section { padding-top: 3.5rem; }
  .contact { margin-top: 4rem; padding: 3.5rem 0; }
}