/* ── Shared KashVector vars (mirrors brand.css for standalone dev) ── */
:root {
  --kv-bg:      #0f172a;
  --kv-card:    #1e293b;
  --kv-card-2:  #273449;
  --kv-text:    #f1f5f9;
  --kv-muted:   #94a3b8;
  --kv-accent:  #38bdf8;
  --kv-accent-h:#0ea5e9;
  --kv-border:  #334155;
  --kv-pass:    #22c55e;
}

/* ── Light mode ── */
html:not(.dark) {
  --kv-bg:     #edf2f7;
  --kv-card:   #d4dce8;
  --kv-card-2: #c5cfe0;
  --kv-text:   #0f172a;
  --kv-muted:  #64748b;
  --kv-border: #e2e8f0;
  --kv-accent: #0369a1;
  --kv-warn:   #d97706;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--kv-bg);
  color: var(--kv-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  min-height: 100vh;
}

/* ── Header ── */
.app-header {
  position: relative;
  text-align: center;
  padding: 28px 20px 20px;
  border-bottom: 1px solid var(--kv-border);
}

.app-header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--kv-text);
}

.app-header p {
  font-size: 0.85rem;
  color: var(--kv-muted);
  margin-top: 4px;
}

.home-logo {
  position: absolute;
  top: 12px;
  left: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-decoration: none;
}

.home-logo img { width: 32px; height: 32px; opacity: 0.9; display: block; transition: opacity 0.15s; }
.home-logo:hover img { opacity: 1; }
.home-logo-label {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--kv-muted);
  transition: color 0.15s;
  white-space: nowrap;
}
.home-logo:hover .home-logo-label { color: var(--kv-accent); }

.theme-toggle {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--kv-border);
  background: var(--kv-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--kv-muted);
  font-size: 0.9rem;
  transition: background 0.15s, border-color 0.15s;
}
.theme-toggle:hover { background: var(--kv-card-2); border-color: var(--kv-accent); color: var(--kv-text); }

/* ── Articles listing page ── */
.articles-list {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

.articles-list-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--kv-text);
  margin-bottom: 6px;
}

.articles-list-subtitle {
  font-size: 0.9rem;
  color: var(--kv-muted);
  margin-bottom: 40px;
}

.article-entry {
  border-bottom: 1px solid var(--kv-border);
  padding: 20px 0;
}

.article-entry:last-child { border-bottom: none; }

.article-entry-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.article-entry-title a {
  color: var(--kv-text);
  text-decoration: none;
  transition: color 0.15s;
}

.article-entry-title a:hover { color: var(--kv-accent); }

.article-entry-date {
  font-size: 0.78rem;
  color: var(--kv-muted);
  margin-bottom: 6px;
}

.article-entry-desc {
  font-size: 0.88rem;
  color: var(--kv-muted);
  line-height: 1.5;
  margin-bottom: 8px;
}

.article-entry-read {
  font-size: 0.82rem;
  color: var(--kv-accent);
  text-decoration: none;
  font-weight: 500;
}

.article-entry-read:hover { color: var(--kv-accent-h); }

/* ── Article page body ── */
.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.article-breadcrumb {
  font-size: 0.8rem;
  color: var(--kv-muted);
  margin-bottom: 20px;
}

.article-breadcrumb a {
  color: var(--kv-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.article-breadcrumb a:hover { color: var(--kv-accent); }

.article-headline {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--kv-text);
  margin-bottom: 12px;
}

.article-byline {
  font-size: 0.82rem;
  color: var(--kv-muted);
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--kv-border);
}

.article-ai-note {
  font-size: 0.78rem;
  color: var(--kv-muted);
  font-style: italic;
  border-left: 3px solid var(--kv-border);
  padding: 8px 12px;
  margin-top: -16px;
  margin-bottom: 28px;
  line-height: 1.6;
}

.article-body p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--kv-text);
  margin-bottom: 16px;
}

.article-body h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--kv-text);
  margin: 36px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--kv-border);
}

.article-body ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.article-body li {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--kv-text);
  margin-bottom: 6px;
}

.article-summary {
  background: var(--kv-card);
  border: 1px solid var(--kv-border);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 28px;
}

.article-summary p {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--kv-muted);
  margin-bottom: 10px;
}

.article-summary ul { margin: 0; }
.article-summary li { font-size: 0.9rem; color: var(--kv-muted); }

/* ── CTA card ── */
.article-cta {
  display: block;
  background: var(--kv-card);
  border: 1px solid var(--kv-accent);
  border-radius: 10px;
  padding: 16px 20px;
  margin: 24px 0 32px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.article-cta:hover { background: var(--kv-card-2); border-color: var(--kv-accent-h); }

.article-cta-label {
  display: block;
  font-size: 0.72rem;
  color: var(--kv-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-cta-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--kv-accent);
}

/* ── Disclaimer ── */
.article-disclaimer {
  font-size: 0.8rem;
  color: var(--kv-muted);
  font-style: italic;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--kv-border);
  line-height: 1.6;
}

/* ── FAQ section (reuses KashVector pattern) ── */
.tool-info {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 48px;
}

.tool-info h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--kv-text);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--kv-border);
}

.faq-item { border-bottom: 1px solid var(--kv-border); padding: 10px 0; }
.faq-item summary {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--kv-text);
  cursor: pointer;
  list-style: none;
  padding-right: 20px;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; position: absolute; right: 0; color: var(--kv-muted); }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { font-size: 0.85rem; color: var(--kv-muted); line-height: 1.6; margin-top: 8px; }

/* ── Footer ── */
footer {
  text-align: center;
  padding: 24px 20px;
  border-top: 1px solid var(--kv-border);
  font-size: 0.8rem;
  color: var(--kv-muted);
}

footer a { color: var(--kv-muted); text-decoration: none; }
footer a:hover { color: var(--kv-accent); }

/* ── Mobile ── */
@media (max-width: 680px) {
  .app-header { display: flex; align-items: flex-start; gap: 8px; padding: 12px 16px; text-align: left; }
  .home-logo { position: static; flex: 0 0 auto; order: 1; padding-top: 4px; }
  .app-header-center { flex: 1; min-width: 0; order: 2; text-align: center; }
  .theme-toggle { position: static; flex: 0 0 auto; order: 3; width: 44px; height: 44px; }
  .app-header h1 { font-size: 1.1rem; }
  .article-headline { font-size: 1.3rem; }
  input, select, textarea { font-size: 16px; }
}