/* ── Variables ─────────────────────────── */
:root {
  --navy:    #1E3A5F;
  --blue:    #2E6B9E;
  --orange:  #E8541A;
  --white:   #FFFFFF;
  --surface: #F7F8FA;
  --border:  #E8ECF0;
  --muted:   #64748B;
  --radius:  8px;
}

/* ── Reset ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--navy);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ── Header ────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1260px; margin: 0 auto; padding: 0 2rem;
  height: 66px; display: flex; align-items: center;
  justify-content: space-between; position: relative;
}
.logo img { height: 34px; width: auto; }

.menu-toggle {
  display: none; background: none; border: none;
  cursor: pointer; color: var(--navy); padding: 4px;
}

nav { display: flex; align-items: center; gap: 2rem; }
nav a { font-size: 0.82rem; font-weight: 600; color: var(--muted); transition: color 0.15s; }
nav a:hover, nav a.active { color: var(--navy); }
.nav-cta {
  background: var(--orange) !important; color: var(--white) !important;
  padding: 0.45rem 1.1rem; border-radius: var(--radius);
  font-size: 0.8rem; font-weight: 700 !important; transition: opacity 0.15s;
}
.nav-cta:hover { opacity: 0.85; }

/* ── Hero ──────────────────────────────── */
.hero {
  background: var(--navy);
  padding: 5rem 2rem;
  border-bottom: 3px solid var(--orange);
}
.hero-inner { max-width: 1260px; margin: 0 auto; }

.hero-eyebrow {
  display: inline-block; font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--orange); margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.75rem); font-weight: 800;
  line-height: 1.08; letter-spacing: -0.03em;
  color: var(--white); margin-bottom: 1.25rem; max-width: 700px;
}
.hero h1 span { color: var(--orange); }
.hero-sub {
  font-size: 0.975rem; color: rgba(255,255,255,0.6);
  line-height: 1.75; max-width: 480px; font-weight: 500;
}

/* ── Page Layout ───────────────────────── */
.page-layout {
  max-width: 1260px; margin: 0 auto;
  padding: 3.5rem 2rem 6rem;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 4rem;
  align-items: start;
}

/* ── Sidebar ───────────────────────────── */
.sidebar { position: sticky; top: 84px; }

.search-wrap { position: relative; margin-bottom: 2.25rem; }
.search-icon {
  position: absolute; left: 0.875rem; top: 50%;
  transform: translateY(-50%); color: var(--muted); pointer-events: none;
}
.search-input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.5rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 0.82rem;
  color: var(--navy); background: var(--white); outline: none;
  transition: border-color 0.15s; -webkit-appearance: none;
}
.search-input::placeholder { color: var(--muted); opacity: 0.6; }
.search-input:focus { border-color: var(--orange); }

.sidebar-label {
  font-size: 0.62rem; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 0.625rem;
  display: block;
}
.cat-nav { display: flex; flex-direction: column; gap: 2px; }
.cat-nav a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.575rem 0.75rem; border-radius: 6px;
  font-size: 0.82rem; font-weight: 600; color: var(--muted);
  transition: all 0.15s;
}
.cat-nav a:hover { background: var(--surface); color: var(--navy); }
.cat-nav a.active { background: var(--surface); color: var(--navy); }
.cat-nav a.active-cat { color: var(--orange); background: #FFF3EE; }

.cat-count {
  font-size: 0.68rem; font-weight: 600; color: var(--muted);
  background: var(--surface); padding: 0.1rem 0.45rem; border-radius: 20px;
}

/* ── Main Content ──────────────────────── */
.content { min-width: 0; }

/* ── Featured Card ─────────────────────── */
.featured-card {
  display: block; background: var(--navy); color: var(--white);
  padding: 2.75rem; border-radius: var(--radius);
  margin-bottom: 1.5rem; transition: opacity 0.15s;
}
.featured-card:hover { opacity: 0.93; }

.featured-label {
  display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.25rem;
}
.featured-tag {
  font-size: 0.6rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--orange);
}
.featured-badge {
  font-size: 0.6rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.08); padding: 0.2rem 0.6rem; border-radius: 20px;
}
.featured-card h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.1rem); font-weight: 800;
  line-height: 1.2; letter-spacing: -0.025em;
  color: var(--white); margin-bottom: 1rem;
}
.featured-card .excerpt {
  font-size: 0.925rem; opacity: 0.65; line-height: 1.75;
  margin-bottom: 2rem; font-weight: 500;
}
.featured-footer {
  display: flex; align-items: center; justify-content: space-between;
}
.featured-meta { font-size: 0.75rem; color: rgba(255,255,255,0.4); font-weight: 500; }
.read-link {
  font-size: 0.78rem; font-weight: 700; color: var(--orange);
  letter-spacing: 0.04em; display: flex; align-items: center; gap: 0.375rem;
}

/* ── Articles Grid ─────────────────────── */
.articles-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
}
@media (max-width: 700px) { .articles-grid { grid-template-columns: 1fr; } }

/* ── Card ──────────────────────────────── */
.card {
  display: flex; flex-direction: column; padding: 1.625rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--white); transition: border-color 0.15s, box-shadow 0.15s;
}
.card:hover {
  border-color: #C8D3DD;
  box-shadow: 0 4px 16px rgba(30,58,95,0.06);
}
.card-cat {
  font-size: 0.62rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; margin-bottom: 0.875rem;
}
.card-cat.building { color: var(--blue); }
.card-cat.fixing   { color: var(--navy); }
.card-cat.scaling  { color: var(--orange); }

.card h2 {
  font-size: 1rem; font-weight: 700; line-height: 1.35;
  margin-bottom: 0.625rem; color: var(--navy); letter-spacing: -0.01em;
}
.card p {
  font-size: 0.825rem; color: var(--muted); line-height: 1.7;
  flex: 1; margin-bottom: 1.25rem; font-weight: 500;
}
.card-meta { font-size: 0.72rem; color: var(--muted); font-weight: 600; opacity: 0.75; }

/* ── No results ────────────────────────── */
.no-results {
  grid-column: 1 / -1; text-align: center;
  padding: 3rem; color: var(--muted); font-size: 0.9rem; font-weight: 500;
}

/* ── Article Page ──────────────────────── */
.post-wrap { max-width: 680px; margin: 0 auto; padding: 4.5rem 2rem 7rem; }
.back {
  display: inline-flex; align-items: center; gap: 0.375rem;
  font-size: 0.78rem; font-weight: 700; color: var(--muted);
  margin-bottom: 2.25rem; transition: color 0.15s; letter-spacing: 0.02em;
}
.back:hover { color: var(--orange); }
.post-cat {
  font-size: 0.62rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; margin-bottom: 1rem; display: block;
}
.post-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 800;
  line-height: 1.15; letter-spacing: -0.025em; margin-bottom: 0.875rem;
}
.post-byline {
  font-size: 0.78rem; color: var(--muted); font-weight: 600;
  padding-bottom: 2.5rem; border-bottom: 1px solid var(--border); margin-bottom: 2.5rem;
}

/* Prose */
.prose { font-size: 1rem; line-height: 1.85; color: #2C3E52; font-weight: 400; }
.prose h2 {
  font-size: 1.2rem; font-weight: 700; color: var(--navy);
  margin: 2.5rem 0 0.875rem; line-height: 1.3; letter-spacing: -0.015em;
}
.prose h3 { font-size: 1rem; font-weight: 700; color: var(--navy); margin: 2rem 0 0.625rem; }
.prose p  { margin-bottom: 1.5rem; }
.prose ul, .prose ol { padding-left: 1.5rem; margin-bottom: 1.5rem; }
.prose li { margin-bottom: 0.5rem; line-height: 1.7; }
.prose blockquote {
  border-left: 2px solid var(--orange); margin: 2.5rem 0;
  padding: 0 0 0 1.5rem; font-size: 1.05rem;
  font-style: italic; color: var(--navy); font-weight: 600;
}
.prose strong { color: var(--navy); font-weight: 700; }
.prose a { color: var(--blue); text-decoration: underline; }
.prose a:hover { color: var(--orange); }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* ── Contact Page ──────────────────────── */
.contact-wrap { max-width: 620px; margin: 0 auto; padding: 6rem 2rem 5rem; }
.contact-wrap h1 {
  font-size: clamp(2rem, 4vw, 3rem); font-weight: 800;
  letter-spacing: -0.025em; margin-bottom: 1rem; line-height: 1.1;
}
.contact-wrap h1 span { color: var(--orange); }
.contact-wrap .lead {
  font-size: 1rem; color: var(--muted); line-height: 1.8;
  margin-bottom: 3.5rem; font-weight: 500;
}
.contact-options {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 3rem;
}
@media (max-width: 600px) { .contact-options { grid-template-columns: 1fr; } }
.contact-option {
  padding: 1.625rem; border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color 0.15s;
}
.contact-option:hover { border-color: var(--navy); }
.contact-option h3 { font-size: 0.9rem; font-weight: 700; margin-bottom: 0.5rem; }
.contact-option p { font-size: 0.825rem; color: var(--muted); line-height: 1.65; font-weight: 500; }

/* ── CTA Section ───────────────────────── */
.cta { background: var(--navy); color: var(--white); text-align: center; padding: 6rem 2rem; }
.cta-inner { max-width: 500px; margin: 0 auto; }
.cta h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem); font-weight: 800;
  letter-spacing: -0.025em; line-height: 1.15; margin-bottom: 1rem;
}
.cta h2 span { color: var(--orange); }
.cta p {
  font-size: 0.95rem; opacity: 0.6; line-height: 1.75;
  margin-bottom: 2.5rem; font-weight: 500;
}
.cta-btn {
  display: inline-block; background: var(--orange); color: var(--white);
  padding: 0.875rem 2.25rem; border-radius: var(--radius); font-weight: 700;
  font-size: 0.9rem; letter-spacing: 0.02em; font-family: 'Montserrat', sans-serif;
  transition: opacity 0.15s, transform 0.15s;
}
.cta-btn:hover { opacity: 0.88; transform: translateY(-1px); }

/* ── Footer ────────────────────────────── */
.site-footer { border-top: 1px solid var(--border); padding: 2rem; }
.footer-inner {
  max-width: 1260px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 2rem; flex-wrap: wrap;
}
.footer-logo img { height: 26px; }
.footer-links { display: flex; gap: 1.75rem; }
.footer-links a { font-size: 0.775rem; color: var(--muted); font-weight: 600; transition: color 0.15s; }
.footer-links a:hover { color: var(--navy); }
.footer-copy { font-size: 0.75rem; color: var(--muted); font-weight: 500; }

/* ── Utility ───────────────────────────── */
.loading, .empty { text-align: center; padding: 4rem 2rem; color: var(--muted); font-size: 0.9rem; font-weight: 500; }

/* ── Mobile ────────────────────────────── */
@media (max-width: 900px) {
  .page-layout { grid-template-columns: 1fr; gap: 2rem; }
  .sidebar { position: static; }
  .cat-nav { flex-direction: row; flex-wrap: wrap; gap: 0.5rem; }
  .cat-nav a { padding: 0.4rem 0.875rem; border: 1px solid var(--border); border-radius: 20px; }
  .cat-nav a.active, .cat-nav a.active-cat { border-color: transparent; }
}
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  nav {
    display: none; position: absolute; top: 66px; left: 0; right: 0;
    background: var(--white); flex-direction: column; align-items: flex-start;
    padding: 1.5rem 2rem; border-bottom: 1px solid var(--border);
    gap: 1.25rem; box-shadow: 0 8px 16px rgba(0,0,0,0.05);
  }
  nav.open { display: flex; }
  .hero { padding: 3.5rem 1.5rem; }
  .post-wrap { padding: 2.5rem 1.5rem 4rem; }
  .cta { padding: 4.5rem 1.5rem; }
  .footer-inner { flex-direction: column; text-align: center; gap: 1rem; }
  .footer-links { justify-content: center; }
}