/* SmartFinance — blog / guides (static HTML) */

:root {
  --brand: #1d9e75;
  --brand-dark: #0f7558;
  --brand-tint: #ecfdf5;
  --brand-line: #a7f3d0;
  --ink: #0f172a;
  --ink-mute: #475569;
  --ink-faint: #94a3b8;
  --line: #e5e7eb;
  --bg: #f7f8f6;
  --surface: #ffffff;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 1px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.04);
  --text: var(--ink);
  --muted-light: #64748b;
  --border: var(--line);
}

* { box-sizing: border-box; }

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 100% -10%, #ecfdf5 0%, transparent 55%),
    radial-gradient(1000px 500px at -10% 110%, #f1f5f9 0%, transparent 50%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Sticky top nav (matches calculator pages) ───────────── */
.topnav {
  height: 52px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: 0 24px;
  gap: 6px;
  font-size: 13px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.breadcrumb-item {
  color: var(--muted-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s;
}

.breadcrumb-item:hover,
.breadcrumb-item:focus-visible {
  color: var(--ink);
}

.breadcrumb-sep {
  color: #d1d5db;
  user-select: none;
}

.breadcrumb-current {
  font-weight: 600;
  color: var(--ink);
}

/* ── Layout ───────────────────────────────────────────────── */
.blog-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 24px 64px;
}

.blog-index-page {
  max-width: 900px;
}

.blog-article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 28px 32px;
  box-shadow: var(--shadow-md);
}

.blog-kicker {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
}

.blog-article h1 {
  margin: 0 0 12px;
  font-size: clamp(1.55rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
}

.blog-deck {
  margin: 0 0 18px;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--ink-mute);
}

.blog-tool-cta {
  margin: 0 0 20px;
  padding: 14px 16px;
  background: linear-gradient(135deg, var(--brand-tint) 0%, #f8fafc 100%);
  border: 1px solid var(--brand-line);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-mute);
}

.blog-tool-cta a {
  color: var(--brand-dark);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(29, 158, 117, 0.35);
  text-underline-offset: 3px;
}

.blog-tool-cta a:hover {
  color: var(--brand);
}

.blog-disclaimer {
  margin: 0 0 24px;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-mute);
  background: #f8fafc;
  border-left: 3px solid var(--ink-faint);
  border-radius: 0 8px 8px 0;
}

/* ── Prose ──────────────────────────────────────────────── */
.blog-body h2 {
  margin: 28px 0 12px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.blog-body h2:first-child {
  margin-top: 0;
}

.blog-body p {
  margin: 0 0 14px;
  color: var(--ink-mute);
  font-size: 1rem;
  line-height: 1.7;
}

.blog-body ul {
  margin: 0 0 16px;
  padding-left: 1.25rem;
  color: var(--ink-mute);
}

.blog-body li {
  margin-bottom: 8px;
}

.blog-body a {
  color: var(--brand-dark);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: rgba(29, 158, 117, 0.4);
  text-underline-offset: 2px;
}

.blog-body a:hover {
  color: var(--brand);
}

.blog-related {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-mute);
}

.blog-related strong {
  color: var(--ink);
}

.blog-related a {
  color: var(--brand-dark);
  font-weight: 600;
  text-decoration: none;
}

.blog-related a:hover {
  text-decoration: underline;
}

/* ── Blog index ───────────────────────────────────────────── */
.blog-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.blog-list li {
  margin: 0;
}

.blog-list a {
  display: block;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.blog-list a:hover {
  border-color: var(--brand-line);
  box-shadow: var(--shadow-md);
}

.blog-list-title {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.blog-list a:hover .blog-list-title {
  color: var(--brand-dark);
}

.blog-list-blurb {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-mute);
}

.blog-list-meta {
  margin: 10px 0 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand);
}

.blog-footer {
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 14px 22px;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--ink-faint);
}

.blog-footer a {
  color: var(--ink-mute);
  font-weight: 500;
  text-decoration: none;
}

.blog-footer a:hover {
  color: var(--brand-dark);
  text-decoration: underline;
}

@media (max-width: 600px) {
  .blog-article {
    padding: 22px 18px 26px;
  }

  .topnav {
    height: auto;
    min-height: 48px;
    padding-top: 10px;
    padding-bottom: 10px;
  }
}