:root {
  --bg: #f7f4ed;
  --ink: #1a1814;
  --muted: #7d7468;
  --rule: #ded6c7;
  --card: #fff;
  --accent: #ff4d1c;
  --ok: #15803d;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.nav-brand-icon {
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.nav-brand-icon img { width: 100%; height: 100%; border-radius: inherit; display: block; object-fit: cover; }
.nav-brand h1 { font-size: 20px; font-weight: 800; }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links > a,
.nav-drop > button {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
  padding: 0;
}
.nav-links > a:hover,
.nav-links > a.active,
.nav-drop > button:hover,
.nav-drop.open > button { color: var(--ink); }
.nav-drop { position: relative; }
.nav-drop > button {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 11px 0;
}
.nav-drop > button::after {
  content: "";
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  margin-top: 1px;
}
.nav-menu {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(26, 24, 20, 0.08);
  padding: 6px;
  z-index: 200;
}
.nav-drop.open .nav-menu,
.nav-drop:focus-within .nav-menu { display: block; }
.nav-menu a {
  display: block;
  padding: 10px 12px;
  border-radius: 7px;
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
}
.nav-menu a:hover,
.nav-menu a.active { background: #fff3f0; color: var(--accent); }
.nav-menu .hint {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}
.nav-links a.btn-nav {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 18px;
  font: inherit;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.nav-burger { display: none; }
.mobile-menu { display: none; }

main { flex: 1; }

.page-header {
  max-width: 900px;
  margin: 0 auto;
  padding: 56px 24px 32px;
}
.page-label {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 12px;
}
.page-header h2 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 12px;
}
.page-header p {
  font-size: 17px;
  color: var(--muted);
  max-width: 620px;
}

.filter-bar {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.filter-bar span {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-right: 4px;
}
.filter-chip {
  background: var(--card);
  border: 1.5px solid var(--rule);
  border-radius: 99px;
  padding: 11px 16px;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.filter-chip:hover { border-color: var(--accent); }
.filter-chip.active {
  background: #fff3f0;
  border-color: var(--accent);
  color: var(--accent);
}

.post-grid {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 64px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.post-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.post-card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 24px rgba(255, 77, 28, 0.1);
  transform: translateY(-2px);
}
.post-card.hidden { display: none; }
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.post-tag {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: 99px;
  background: var(--bg);
  border: 1px solid var(--rule);
  color: var(--muted);
}
.post-tag.courier { color: var(--accent); border-color: #ffd5cc; background: #fff3f0; }
.post-card h3 {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 8px;
}
.post-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  flex: 1;
}
.post-card .read-more {
  margin-top: 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}

.empty-state {
  max-width: 900px;
  margin: 0 auto 64px;
  padding: 32px 24px;
  text-align: center;
  color: var(--muted);
  display: none;
}
.empty-state.show { display: block; }

/* Post article */
.article-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}
.article-wrap h1 {
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 900;
  letter-spacing: -.5px;
  line-height: 1.15;
  margin-bottom: 16px;
}
.article-meta {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
}
.article-wrap h2 {
  font-size: 22px;
  font-weight: 800;
  margin: 36px 0 12px;
}
.article-wrap p,
.article-wrap li {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 16px;
}
.article-wrap ul,
.article-wrap ol {
  padding-left: 24px;
  margin-bottom: 20px;
}
.placeholder-block {
  background: #fff8f5;
  border: 1.5px dashed #ffd5cc;
  border-radius: 12px;
  padding: 24px;
  margin: 28px 0;
  font-size: 14px;
  color: var(--muted);
}
.placeholder-block strong { color: var(--accent); display: block; margin-bottom: 6px; }
.cta-box {
  background: var(--card);
  border: 1.5px solid var(--rule);
  border-radius: 14px;
  padding: 28px;
  margin-top: 40px;
  text-align: center;
}
.cta-box h3 { font-size: 18px; font-weight: 800; margin-bottom: 8px; }
.cta-box p { font-size: 14px; color: var(--muted); margin-bottom: 16px; }
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 12px 24px;
  font: inherit;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
}
.breadcrumb {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 13px;
  color: var(--muted);
}
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }

/* Tutorials */
.tutorial-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 48px;
}
.tutorial-section h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 6px;
}
.tutorial-section > p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 20px;
}
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.tutorial-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 14px;
  overflow: hidden;
}
.video-placeholder {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #2a2620 0%, #1a1814 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  position: relative;
}
.video-placeholder::before {
  content: "▶";
  font-size: 28px;
  opacity: .9;
}
.video-placeholder span {
  position: absolute;
  bottom: 10px;
  left: 12px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  opacity: .7;
}
.tutorial-body { padding: 20px; }
.tutorial-body h4 { font-size: 16px; font-weight: 800; margin-bottom: 6px; }
.tutorial-body p { font-size: 14px; color: var(--muted); line-height: 1.5; margin-bottom: 12px; }
.tutorial-body a {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}

footer {
  border-top: 1px solid var(--rule);
  padding: 28px 32px;
  text-align: center;
}
.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.footer-links a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--ink); }
.footer-copy { font-size: 13px; color: var(--muted); }

@media (max-width: 700px) {
  nav { padding: 10px 16px; }
  .nav-links { gap: 10px; }
  .nav-links > a:not(.btn-nav),
  .nav-drop { display: none; }
  .nav-links a.btn-nav { padding: 8px 12px; font-size: 13px; }
  .btn-nav-tail { display: none; }
  .nav-burger {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 11px 10px;
    background: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
  }
  .nav-burger span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--ink);
    border-radius: 2px;
    transition: transform .25s cubic-bezier(.22, 1, .36, 1), opacity .2s ease;
  }
  .nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-burger.open span:nth-child(2) { opacity: 0; }
  .nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .mobile-menu {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--rule);
    box-shadow: 0 12px 24px rgba(26, 24, 20, .08);
    padding: 6px 8px 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity .2s ease, transform .25s cubic-bezier(.22, 1, .36, 1), visibility .2s;
  }
  .mobile-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .mobile-menu a {
    display: block;
    padding: 13px 12px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--ink);
    font-size: 15px;
    font-weight: 600;
  }
  .mobile-menu a:hover { background: #fff3f0; color: var(--accent); }
  .page-header { padding-top: 40px; }
}
@media (prefers-reduced-motion: reduce) {
  .nav-burger span,
  .mobile-menu { transition: none; }
}