/* ══════════════════════════════════════════════════════
   Angler BI — blog.css
   Blog index + individual article styles
   Extends styles.css design tokens ("Blueprint", light)
══════════════════════════════════════════════════════ */

/* ─── BLOG HERO ──────────────────────────────────────── */
.blog-hero {
  padding: calc(var(--nav-h) + 96px) 0 72px;
  background: var(--paper);
  position: relative;
}

.blog-hero-inner {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.blog-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  border: 1px solid var(--hairline-2);
  border-radius: 100px;
  background: var(--white);
  animation: heroRise 0.9s var(--ease) both;
}

.blog-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.blog-headline {
  font-size: clamp(2.5rem, 5.2vw, 4rem);
  font-weight: 620;
  line-height: 1.04;
  letter-spacing: -0.04em;
  margin-top: 24px;
  max-width: 16ch;
  animation: heroRise 0.9s 0.08s var(--ease) both;
}

.blog-headline em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.blog-subhead {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.65;
  margin-top: 20px;
  max-width: 54ch;
  animation: heroRise 0.9s 0.16s var(--ease) both;
}

@media (prefers-reduced-motion: reduce) {

  .blog-eyebrow,
  .blog-headline,
  .blog-subhead {
    animation: none;
  }
}

/* ─── FILTER TABS ────────────────────────────────────── */
.blog-filters {
  position: sticky;
  top: var(--nav-h);
  z-index: 20;
  background: rgba(251, 252, 253, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.blog-filters-inner {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block: 14px;
  scrollbar-width: none;
}

.blog-filters-inner::-webkit-scrollbar {
  display: none;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: var(--white);
  border: 1px solid var(--hairline-2);
  border-radius: 100px;
  padding: 9px 18px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.3s var(--ease);
}

.filter-btn:hover {
  color: var(--ink);
  border-color: var(--ink);
  transform: translateY(-1px);
}

.filter-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

/* ─── ARTICLES GRID ──────────────────────────────────── */
.blog-grid-section {
  background: var(--paper-2);
  padding-block: clamp(56px, 8vw, 88px);
  min-height: 50vh;
}

.blog-grid-inner {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease), border-color 0.45s var(--ease);
  opacity: 0;
  transform: translateY(20px);
  animation: cardIn 0.7s var(--ease) forwards;
  animation-delay: calc(var(--i, 0) * 0.07s);
}

@keyframes cardIn {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-card {
    opacity: 1;
    transform: none;
    animation: none;
  }
}

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
  border-color: var(--hairline-2);
}

.blog-card-cover {
  aspect-ratio: 16 / 9;
  background-size: cover;
  background-position: center;
  position: relative;
  border-bottom: 1px solid var(--hairline);
}

.blog-card-cover--empty {
  background:
    radial-gradient(ellipse 70% 90% at 50% 110%, var(--tint-2), transparent 70%),
    var(--tint-1);
}

.blog-card-cover--empty::before {
  content: '◇';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--tint-3);
}

.blog-card-body {
  padding: 26px 26px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-card-category {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-ink);
}

.blog-card-title {
  font-size: 1.18rem;
  font-weight: 620;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-top: 12px;
  transition: color 0.3s var(--ease);
}

.blog-card:hover .blog-card-title {
  color: var(--accent-ink);
}

.blog-card-excerpt {
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.58;
  margin-top: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-excerpt:empty {
  display: none;
}

.blog-card-date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin-top: auto;
  padding-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.blog-card-date::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  transition: background 0.3s var(--ease);
}

.blog-card:hover .blog-card-date::before {
  background: var(--accent);
}

/* featured: applied by JS to the newest post */
.blog-card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
}

.blog-card.featured .blog-card-cover {
  aspect-ratio: auto;
  min-height: 300px;
  height: 100%;
  border-bottom: none;
  border-right: 1px solid var(--hairline);
}

.blog-card.featured .blog-card-body {
  padding: clamp(28px, 4vw, 48px);
  justify-content: center;
}

.blog-card.featured .blog-card-title {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  letter-spacing: -0.03em;
}

.blog-card.featured .blog-card-excerpt {
  font-size: 1rem;
  -webkit-line-clamp: 4;
}

.blog-card.featured .blog-card-category::after {
  content: 'LATEST';
  margin-left: 12px;
  padding: 3px 9px;
  border-radius: 100px;
  background: var(--ink);
  color: var(--white);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
}

/* empty state */
.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 90px 24px;
  border: 1px dashed var(--dash);
  border-radius: var(--radius-lg);
  background: var(--white);
}

.blog-empty-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: var(--tint-3);
}

.blog-empty h3 {
  font-size: 1.4rem;
  font-weight: 620;
  letter-spacing: -0.02em;
}

.blog-empty p {
  color: var(--muted);
  margin-top: 10px;
}

.blog-empty a {
  color: var(--accent-ink);
  border-bottom: 1px dotted var(--accent);
}

/* ─── NEWSLETTER ─────────────────────────────────────── */
.blog-newsletter {
  background: var(--paper);
  border-top: 1px solid var(--hairline);
  padding-block: clamp(80px, 11vw, 120px);
}

.blog-newsletter-inner {
  width: min(640px, calc(100% - 48px));
  margin: 0 auto;
  text-align: center;
}

.blog-newsletter h2 {
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  font-weight: 620;
  letter-spacing: -0.035em;
}

.blog-newsletter>.blog-newsletter-inner>p {
  color: var(--muted);
  margin-top: 14px;
}

.newsletter-form {
  display: flex;
  gap: 10px;
  margin-top: 34px;
}

.newsletter-input {
  flex: 1;
  background: var(--white);
  border: 1px solid var(--hairline-2);
  border-radius: 100px;
  padding: 15px 22px;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.newsletter-input::placeholder {
  color: var(--faint);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(7, 195, 232, 0.14);
}

.newsletter-btn {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 550;
  background: var(--ink);
  color: var(--white);
  border: none;
  border-radius: 100px;
  padding: 15px 30px;
  cursor: pointer;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.35s var(--ease), background 0.3s var(--ease);
}

.newsletter-btn:hover {
  transform: translateY(-2px);
  background: #1d3045;
  box-shadow: 0 12px 28px rgba(14, 26, 38, 0.18);
}

.newsletter-fine {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  margin-top: 16px;
}

/* ─── BLOG / ARTICLE FOOTER ──────────────────────────── */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.85);
  padding-block: 56px 40px;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 70% at 85% 115%, rgba(7, 195, 232, 0.14), transparent 65%);
  pointer-events: none;
}

.site-footer .footer-inner {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding-bottom: 0;
  text-align: center;
  position: relative;
}

.site-footer .logo-mark {
  color: #ffffff;
}

.site-footer .logo-accent {
  color: var(--accent);
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.92rem;
}

.site-footer .footer-links {
  display: flex;
  gap: 28px;
}

.site-footer .footer-links a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
  transition: color 0.3s var(--ease);
}

.site-footer .footer-links a:hover {
  color: var(--accent);
  padding-left: 0;
}

.footer-copy {
  font-family: var(--font-mono);
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  margin-top: 10px;
}

/* ─── ARTICLE PAGE ───────────────────────────────────── */
.article-main {
  background: var(--paper);
  padding: calc(var(--nav-h) + 64px) 0 96px;
}

.article-container {
  width: min(760px, calc(100% - 48px));
  margin: 0 auto;
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.3s var(--ease), transform 0.3s var(--ease);
}

.back-link:hover {
  color: var(--accent-ink);
  transform: translateX(-4px);
}

.article-header {
  margin-top: 36px;
}

.article-category {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.article-category::before {
  content: '';
  width: 22px;
  height: 1px;
  background: var(--accent);
}

.article-title {
  font-size: clamp(2rem, 4.4vw, 3.1rem);
  font-weight: 620;
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin-top: 18px;
  text-wrap: balance;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 22px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--hairline);
}

.article-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}

.article-hero-image {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  margin-top: 36px;
}

.article-hero-image--placeholder {
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(ellipse 70% 90% at 50% 110%, var(--tint-2), transparent 70%),
    var(--tint-1);
}

/* article typography */
.article-body {
  margin-top: 44px;
  color: var(--ink-2);
  font-size: 1.06rem;
  line-height: 1.8;
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 620;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 52px 0 18px;
  line-height: 1.22;
}

.article-body h3 {
  font-size: 1.28rem;
  font-weight: 620;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 40px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body strong {
  color: var(--ink);
  font-weight: 620;
}

.article-body a {
  color: var(--accent-ink);
  border-bottom: 1px solid var(--tint-3);
  transition: border-color 0.3s var(--ease);
}

.article-body a:hover {
  border-bottom-color: var(--accent-ink);
}

.article-body ul,
.article-body ol {
  margin: 0 0 20px 4px;
  display: grid;
  gap: 10px;
}

.article-body ul li {
  position: relative;
  padding-left: 26px;
  list-style: none;
}

.article-body ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-deep);
  font-size: 0.85rem;
}

.article-body ol {
  margin-left: 24px;
}

.article-body ol li {
  padding-left: 6px;
}

.article-body ol li::marker {
  font-family: var(--font-mono);
  color: var(--accent-ink);
  font-size: 0.9rem;
}

.article-body blockquote {
  border-left: 3px solid var(--accent);
  background: var(--tint-1);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 22px 26px;
  margin: 28px 0;
  font-size: 1.12rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink);
}

.article-body blockquote p {
  margin-bottom: 0;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 2px 7px;
  color: var(--accent-ink);
}

.article-body pre {
  background: var(--ink);
  border-radius: var(--radius);
  padding: 22px;
  overflow-x: auto;
  margin: 24px 0;
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: #e8eef4;
}

.article-body img {
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  margin: 28px 0;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 44px 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.94rem;
}

.article-body th {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-ink);
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--hairline-2);
}

.article-body td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--hairline);
}

/* article footer / CTA */
.article-footer {
  margin-top: 64px;
}

.article-cta {
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: #ffffff;
  padding: clamp(36px, 5vw, 52px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.article-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 90% at 85% 115%, rgba(7, 195, 232, 0.22), transparent 65%);
  pointer-events: none;
}

.article-cta h3 {
  font-size: 1.5rem;
  font-weight: 620;
  letter-spacing: -0.025em;
  position: relative;
}

.article-cta p {
  color: rgba(255, 255, 255, 0.65);
  margin-top: 12px;
  max-width: 46ch;
  margin-inline: auto;
  position: relative;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 0.94rem;
  font-weight: 550;
  background: var(--accent);
  color: var(--ink);
  border-radius: 100px;
  padding: 14px 30px;
  margin-top: 26px;
  position: relative;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.35s var(--ease), background 0.3s var(--ease);
}

.cta-btn:hover {
  transform: translateY(-2px);
  background: #4fd9f5;
  box-shadow: 0 10px 28px rgba(7, 195, 232, 0.35);
}

/* ─── RESPONSIVE ─────────────────────────────────────── */
@media (max-width: 1020px) {
  .blog-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .blog-card.featured {
    grid-template-columns: 1fr;
  }

  .blog-card.featured .blog-card-cover {
    aspect-ratio: 16 / 9;
    min-height: 0;
    border-right: none;
    border-bottom: 1px solid var(--hairline);
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-btn {
    width: 100%;
  }
}