/* ===========================================================
   Local Home Lab — shared stylesheet
   Plain CSS, mobile-first, no build step.
   =========================================================== */

:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-text: #1c2430;
  --color-text-muted: #56606f;
  --color-primary: #2a6f4b;
  --color-primary-dark: #1e5136;
  --color-accent: #d97b29;
  --color-border: #e2e5ea;
  --max-width: 1080px;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(20, 30, 20, 0.08), 0 1px 2px rgba(20, 30, 20, 0.06);
  font-size: 17px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header / nav ---------- */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
  gap: 0.75rem;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.site-brand:hover {
  text-decoration: none;
}

.site-brand .logo-mark {
  display: inline-block;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-primary);
}

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(160deg, #eef4ef 0%, #f7f8fa 60%);
  border-bottom: 1px solid var(--color-border);
}

.hero .container {
  padding-top: 3.25rem;
  padding-bottom: 3rem;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 0.75rem;
  max-width: 40ch;
}

.hero p.lede {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 0 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- Main content layout ---------- */

main {
  padding: 2.5rem 0 3rem;
}

.section-title {
  font-size: 1.5rem;
  margin: 0 0 1.25rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0 2.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.card .tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  background: #e7f1ea;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.6rem;
}

/* ---------- Article ---------- */

.article-header {
  max-width: 72ch;
  margin: 0 auto 1.5rem;
}

.article-header .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  background: #e7f1ea;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.article-header h1 {
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  margin: 0 0 0.6rem;
}

.article-meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

article.article-body {
  max-width: 72ch;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow);
}

article.article-body h2 {
  font-size: 1.35rem;
  margin-top: 2rem;
}

article.article-body h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
}

article.article-body ul,
article.article-body ol {
  padding-left: 1.4rem;
}

article.article-body li {
  margin-bottom: 0.4rem;
}

article.article-body code {
  background: #eef1f5;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

article.article-body pre {
  background: #1c2430;
  color: #e9edf2;
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
}

article.article-body pre code {
  background: none;
  padding: 0;
  color: inherit;
}

article.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  margin: 1.25rem 0;
  padding: 0.25rem 1rem;
  color: var(--color-text-muted);
  background: #f2f6f3;
  border-radius: 0 6px 6px 0;
}

.callout {
  background: #fdf3e7;
  border: 1px solid #f1d9b5;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.callout strong {
  color: var(--color-accent);
}

.related-links {
  max-width: 72ch;
  margin: 2rem auto 0;
}

/* ---------- Ad slots ---------- */

.ad-slot {
  max-width: 72ch;
  margin: 2rem auto;
  text-align: center;
}

.ad-slot .ad-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

/* ---------- Simple content pages (about/privacy) ---------- */

.prose {
  max-width: 72ch;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow);
}

.prose h1 {
  margin-top: 0;
}

.prose h2 {
  font-size: 1.25rem;
  margin-top: 1.75rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-top: 2rem;
}

.site-footer .container {
  padding: 1.75rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  :root {
    font-size: 16px;
  }

  article.article-body,
  .prose {
    padding: 1.25rem 1.25rem;
  }

  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }
}