/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fafafa;
}

/* === Nav === */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 2rem;
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
}
.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: #1a1a1a;
  text-decoration: none;
}
.nav-links a {
  margin-left: 1.5rem;
  color: #555;
  text-decoration: none;
  font-size: 0.95rem;
}
.nav-links a:hover { color: #1a1a1a; }

/* === Container === */
.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

/* === Stats === */
.stats {
  display: flex;
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.stat-card {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  padding: 1.2rem 2rem;
  text-align: center;
}
.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: #2563eb;
}
.stat-label {
  font-size: 0.85rem;
  color: #888;
  text-transform: uppercase;
}

/* === Headings === */
h1 { font-size: 1.6rem; margin-bottom: 1rem; }
h2 { font-size: 1.3rem; margin: 1.5rem 0 0.8rem; }

/* === Page list === */
.page-list { list-style: none; }
.page-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid #f0f0f0;
}
.page-list a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
}
.page-list a:hover { text-decoration: underline; }
.meta {
  margin-left: 0.8rem;
  font-size: 0.85rem;
  color: #999;
}
.snippet {
  margin-top: 0.3rem;
  font-size: 0.9rem;
  color: #666;
}
.empty { color: #999; font-style: italic; }

/* === Tags === */
.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  margin: 0.15rem;
  background: #e8f0fe;
  color: #2563eb;
  border-radius: 4px;
  font-size: 0.8rem;
  text-decoration: none;
}
.tag:hover { background: #d0e0fd; }
.tag-active { background: #2563eb; color: #fff; }
.tag-count {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-left: 0.2rem;
}
.tag-cloud { margin: 1rem 0; }
.page-tags { margin: 0.5rem 0 1rem; }

/* === Page view === */
.page-meta {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 0.5rem;
}
.page-meta span { margin-right: 1.5rem; }
.page-content {
  margin-top: 1.5rem;
  line-height: 1.8;
}
.page-content h1 { font-size: 1.4rem; }
.page-content h2 { font-size: 1.2rem; }
.page-content h3 { font-size: 1.05rem; }
.page-content p { margin: 0.8rem 0; }
.page-content ul, .page-content ol { margin: 0.8rem 0 0.8rem 1.5rem; }
.page-content code {
  background: #f4f4f4;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
}
.page-content pre {
  background: #f4f4f4;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1rem 0;
}
.page-content pre code { background: none; padding: 0; }
.page-content blockquote {
  border-left: 3px solid #ddd;
  padding-left: 1rem;
  color: #666;
  margin: 1rem 0;
}
.page-content img { max-width: 100%; border-radius: 6px; margin: 0.5rem 0; }
.page-content a { color: #2563eb; }
.page-content table {
  border-collapse: collapse;
  margin: 1rem 0;
  width: 100%;
}
.page-content th, .page-content td {
  border: 1px solid #ddd;
  padding: 0.5rem 0.8rem;
  text-align: left;
}
.page-content th { background: #f8f8f8; }

/* === Search & Ask === */
.search-form {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
}
.search-form input {
  flex: 1;
  padding: 0.6rem 0.8rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
}
.search-form button {
  padding: 0.6rem 1.2rem;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}
.search-form button:hover { background: #1d4ed8; }
.result-count {
  font-size: 0.9rem;
  color: #888;
  margin-bottom: 0.5rem;
}
.answer-box {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1rem;
}

/* === Login === */
.login-container {
  max-width: 400px;
  margin: 8rem auto;
  text-align: center;
}
.login-subtitle {
  color: #888;
  margin-bottom: 2rem;
}
.login-form {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.login-form input {
  padding: 0.8rem 1rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
  text-align: center;
}
.login-form button {
  padding: 0.8rem;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}
.login-form button:hover { background: #1d4ed8; }
.error-msg {
  background: #fef2f2;
  color: #dc2626;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

/* === Nav user === */
.nav-user {
  margin-left: 1.5rem;
  font-size: 0.85rem;
  color: #888;
  padding: 0.2rem 0.6rem;
  background: #f0f0f0;
  border-radius: 4px;
}
.nav-logout {
  font-size: 0.85rem;
  color: #dc2626 !important;
}

/* === Knowledge Graph === */
.graph-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.graph-stats { display: flex; gap: 0.5rem; }
.stat-pill {
  padding: 0.2rem 0.7rem;
  background: #e8f0fe;
  color: #2563eb;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 500;
}
.graph-controls {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  margin-bottom: 0.8rem;
  flex-wrap: wrap;
}
.graph-controls select {
  padding: 0.4rem 0.6rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 0.9rem;
  background: #fff;
}
.graph-checkbox {
  font-size: 0.9rem;
  color: #666;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
#graph-container {
  width: 100%;
  height: 600px;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  background: #fff;
}
.graph-info {
  margin-top: 1rem;
  padding: 1rem;
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  font-size: 0.9rem;
  min-height: 2rem;
}
.graph-info ul {
  list-style: none;
  margin-top: 0.5rem;
}
.graph-info li { padding: 0.2rem 0; }
.graph-info a { color: #2563eb; text-decoration: none; }
.graph-info a:hover { text-decoration: underline; }
.graph-info em { color: #888; font-size: 0.85rem; }

/* === Footer === */
.footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.85rem;
  color: #aaa;
}

/* === Submit form + empty-state CTA (added with /submit route) === */
.nav-add {
  background: #2563eb;
  color: #fff !important;
  padding: 0.3em 0.8em;
  border-radius: 6px;
  font-weight: 600;
}
.nav-add:hover { background: #1d4ed8; }

.submit-form {
  display: flex;
  flex-direction: column;
  gap: 1em;
  max-width: 640px;
  margin-top: 1em;
}
.submit-form label {
  display: flex;
  flex-direction: column;
  gap: 0.3em;
  font-weight: 600;
  font-size: 0.9rem;
  color: #444;
}
.submit-form label .required { color: #dc2626; }
.submit-form input[type="url"],
.submit-form textarea {
  padding: 0.6em 0.8em;
  border: 1px solid #d4d4d8;
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
}
.submit-form textarea { font-family: ui-monospace, Menlo, monospace; font-size: 0.85rem; }
.submit-form button {
  align-self: flex-start;
  padding: 0.6em 1.4em;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
}
.submit-form button:hover { background: #1d4ed8; }

.empty-hero {
  text-align: center;
  padding: 2rem 1rem;
  border: 2px dashed #e5e7eb;
  border-radius: 12px;
  margin-top: 1rem;
}
.cta-primary {
  display: inline-block;
  padding: 0.7em 1.6em;
  background: #2563eb;
  color: #fff !important;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  margin-top: 0.5em;
}
.cta-primary:hover { background: #1d4ed8; }

.subtle { color: #71717a; font-size: 0.9rem; }
.notice { background: #dcfce7; color: #166534; padding: 0.8em 1em; border-radius: 6px; margin: 1em 0; }
.error  { background: #fee2e2; color: #991b1b; padding: 0.8em 1em; border-radius: 6px; margin: 1em 0; }

details { margin-top: 1.5em; font-size: 0.9rem; }
details summary { cursor: pointer; color: #2563eb; }
details pre { background: #f4f4f5; padding: 0.8em; border-radius: 6px; overflow-x: auto; }