:root {
  --ink: #1b2430;
  --muted: #5b6b7a;
  --bg: #f6f1e8;
  --paper: #faf6ef;
  --line: #e0d6c8;
  --accent: #5b7c99;
  --accent-dark: #3e5a73;
  --gold: #c4a574;
  --sidebar: #f3ede3;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.app { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
}

.brand {
  font-weight: 800;
  color: var(--accent-dark);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.top-links { display: flex; gap: 14px; margin-left: 8px; }
.top-links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.top-links a.is-on { color: var(--accent-dark); }

.lang-switch { margin-left: auto; display: flex; gap: 6px; }
.lang-btn, .menu-btn {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-weight: 700;
}
.lang-btn.is-on {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.menu-btn { display: none; }

.shell { display: flex; flex: 1; min-height: 0; }

.sidebar {
  width: 300px;
  flex-shrink: 0;
  background: var(--sidebar);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 52px);
  position: sticky;
  top: 52px;
}

.sidebar-head { padding: 12px; }
.sidebar-head input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 0.95rem;
}

.sidebar-scroll {
  overflow: auto;
  padding: 0 8px 24px;
}

.nav-parent { margin-bottom: 4px; }
.nav-parent-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  padding: 10px 10px;
  font-weight: 800;
  color: var(--accent-dark);
  cursor: pointer;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.nav-parent-btn:hover, .nav-parent-btn.is-on { background: #fff; }
.nav-children { display: none; padding: 0 0 8px 8px; }
.nav-parent.is-open .nav-children { display: block; }
.nav-child {
  display: block;
  padding: 7px 10px;
  color: var(--ink);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.92rem;
}
.nav-child:hover, .nav-child.is-on {
  background: #fff;
  color: var(--accent-dark);
}
.nav-blog-link {
  display: block;
  padding: 10px;
  font-weight: 800;
  color: var(--accent-dark);
  text-decoration: none;
  border-radius: 10px;
  margin-top: 8px;
}
.nav-blog-link.is-on, .nav-blog-link:hover { background: #fff; }

.main {
  flex: 1;
  padding: 28px 32px 64px;
  max-width: 860px;
}

.loading { color: var(--muted); }

.hero h1 { margin: 0 0 8px; font-size: 1.85rem; line-height: 1.25; }
.lead { color: var(--muted); font-size: 1.05rem; }
.path {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 0.92rem;
  margin: 16px 0 20px;
}
.shot {
  width: 100%;
  max-width: 420px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  margin: 8px 0 20px;
}
.section { margin: 22px 0; }
.section h2 { font-size: 1.15rem; margin: 0 0 8px; color: var(--accent-dark); }
.section p, .prose p { white-space: pre-wrap; margin: 0 0 10px; }
.prose h2 {
  font-size: 1.28rem;
  line-height: 1.25;
  margin: 1.6em 0 0.45em;
  color: var(--ink);
}
.prose h3 {
  font-size: 1.08rem;
  margin: 1.25em 0 0.35em;
  color: var(--accent-dark);
}
.prose a { color: var(--accent); font-weight: 700; text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--accent-dark); }
.cards {
  display: grid;
  gap: 12px;
}
.card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
}
.card:hover { border-color: var(--accent); }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.kw { font-size: 0.8rem; color: var(--gold); font-weight: 700; margin-top: 8px; }
.related {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.error { color: #8a2b2b; }

@media (max-width: 900px) {
  .menu-btn { display: inline-flex; }
  .sidebar {
    position: fixed;
    left: 0;
    top: 52px;
    bottom: 0;
    z-index: 30;
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    max-height: none;
  }
  .sidebar.is-open { transform: translateX(0); }
  .backdrop {
    position: fixed;
    inset: 52px 0 0;
    background: rgba(27, 36, 48, 0.35);
    z-index: 25;
  }
  .main { padding: 20px 16px 48px; }
}

.lang-switch select {
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  padding: 6px 8px;
  font-weight: 700;
  max-width: 220px;
}
.nav-parent-btn a { color: inherit; text-decoration: none; flex: 1; }
.nav-toggle {
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
}
[dir="rtl"] .sidebar { border-right: 0; border-left: 1px solid var(--line); }