/* ══════════════════════════════════════
   FERROS BLOG — TYPOGRAPHY-FIRST DESIGN
   ══════════════════════════════════════ */

/* ── READING PROGRESS ── */
.reading-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 200;
  background: linear-gradient(90deg, var(--brand-500), var(--brand-300));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.1s linear;
  box-shadow: 0 0 10px rgba(45,212,191,0.4);
}

/* ── ARTICLE LAYOUT ── */
.article-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 720px);
  gap: 64px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

/* ── TABLE OF CONTENTS ── */
.toc {
  position: relative;
  padding-top: 280px;
}
.toc-inner {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.toc-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--surface-400);
  margin-bottom: 16px;
}
.toc-link {
  font-size: 0.8rem;
  color: var(--surface-500);
  padding: 8px 0 8px 16px;
  border-left: 2px solid var(--border-subtle);
  transition: all 0.25s;
  line-height: 1.4;
}
.toc-link:hover {
  color: var(--surface-700);
  border-left-color: var(--surface-400);
}
.toc-link.active {
  color: var(--brand-400);
  border-left-color: var(--brand-400);
}

/* ── ARTICLE CONTENT ── */
.article-content {
  max-width: 720px;
  padding: 120px 0 120px;
}

/* ── Header elements inside article ── */
.article-breadcrumb {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.85rem; font-weight: 500; color: var(--surface-500);
  margin-bottom: 32px; transition: color 0.2s;
}
.article-breadcrumb:hover { color: var(--brand-400); }
.article-meta {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 24px;
  font-size: 0.85rem; font-weight: 500; color: var(--surface-500);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.3px;
}
.meta-dot {
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--surface-400);
}
.article-title {
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--surface-900);
}
.article-lede {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--surface-600);
  max-width: 640px;
  margin-bottom: 0;
}

/* ── Body typography ── */
.article-content p {
  font-size: 1.08rem;
  line-height: 1.85;
  color: var(--surface-700);
  margin-bottom: 24px;
}
.article-content h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--surface-900);
}
.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 48px;
  margin-bottom: 16px;
  color: var(--surface-800);
}
.article-content em {
  font-style: italic;
  color: var(--surface-800);
}
.article-content code {
  background: var(--surface-100);
  border: 1px solid var(--border-subtle);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.88rem;
  color: var(--brand-400);
}

/* ── PULL QUOTES ── */
.pullquote {
  margin: 48px 0 48px -32px;
  padding: 0 0 0 32px;
  border-left: 3px solid transparent;
  position: relative;
}
.pullquote p {
  font-size: 1.35rem !important;
  font-weight: 700;
  line-height: 1.5 !important;
  color: var(--surface-900) !important;
  letter-spacing: -0.01em;
}
.pullquote::before {
  content: '';
  position: absolute;
  left: -3px; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--brand-300), var(--brand-600));
  border-radius: 2px;
}

/* ── SECTION DIVIDERS ── */
.article-divider {
  height: 1px;
  border: none;
  margin: 64px 0;
  background: linear-gradient(90deg, var(--brand-500), rgba(20,184,166,0.15), transparent);
  position: relative;
}

/* ── STATUS GRID ── */
.status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 32px 0 32px;
}
.status-col {
  padding: 28px;
  border-radius: var(--r);
  border: 1px solid var(--border-subtle);
  background: var(--surface-50);
}
.status-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}
.status-built h4 { color: var(--brand-400); }
.status-coming h4 { color: var(--surface-500); }

.status-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.status-col li {
  font-size: 0.9rem;
  color: var(--surface-600);
  line-height: 1.5;
  padding-left: 24px;
  position: relative;
}
.status-built li::before {
  content: '';
  position: absolute;
  left: 0; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: rgba(20,184,166,0.15);
  border: 2px solid var(--brand-500);
}
.status-coming li::before {
  content: '';
  position: absolute;
  left: 0; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 2px solid var(--surface-300);
}
.status-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(20,184,166,0.1);
  color: var(--brand-400);
  margin-left: 4px;
  vertical-align: middle;
}
.status-note {
  display: block;
  font-size: 0.8rem;
  color: var(--surface-500);
  margin-top: 2px;
}

/* ── INVITE CARDS ── */
.invite-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 32px 0 48px;
}
.invite-card {
  padding: 28px 24px;
  border-radius: var(--r);
  border: 1px solid var(--border-subtle);
  background: var(--surface-50);
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
  cursor: pointer;
  text-decoration: none;
}
.invite-card:hover {
  border-color: var(--border-brand);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}
.invite-card svg {
  width: 28px; height: 28px;
  color: var(--brand-400);
}
.invite-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--surface-900);
  margin: 0;
}
.invite-card p {
  font-size: 0.85rem !important;
  color: var(--surface-500) !important;
  line-height: 1.5 !important;
  margin: 0 !important;
}

/* ── STAT CALLOUTS ── */
.blog-stat-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 56px 0;
  background: var(--border-subtle);
  border-radius: var(--r);
  overflow: hidden;
}
.blog-stat {
  text-align: center;
  padding: 28px 16px;
  background: var(--surface-50);
}
.blog-stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 900;
  font-size: 1.8rem;
  color: var(--brand-400);
  line-height: 1;
  margin-bottom: 6px;
}
.blog-stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--surface-500);
}

/* ── ARCHITECTURE DIAGRAM ── */
.blog-arch {
  margin: 40px 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.blog-arch-layer {
  padding: 24px 28px;
  border-radius: var(--r);
  border: 1px solid var(--border-subtle);
}
.blog-arch-edge {
  background: rgba(20,184,166,0.03);
  border-color: var(--border-brand);
}
.blog-arch-root {
  background: var(--surface-100);
}
.blog-arch-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.blog-arch-badge {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.blog-arch-edge .blog-arch-badge {
  background: rgba(20,184,166,0.15);
  color: var(--brand-400);
}
.blog-arch-root .blog-arch-badge {
  background: rgba(255,255,255,0.06);
  color: var(--surface-500);
}
.blog-arch-timing {
  font-size: 0.75rem;
  color: var(--surface-500);
  font-family: 'JetBrains Mono', monospace;
}
.blog-arch-layer p {
  font-size: 0.88rem !important;
  color: var(--surface-500) !important;
  margin: 0 !important;
}
.blog-arch-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 0;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--surface-400);
  gap: 10px;
}
.blog-arch-line {
  width: 2px;
  height: 20px;
  background: var(--border-subtle);
}

/* ── USE CASE CARDS ── */
.blog-usecase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 32px 0;
}
.blog-usecase {
  padding: 24px;
  border-radius: var(--r);
  border: 1px solid var(--border-subtle);
  background: var(--surface-50);
}
.blog-usecase h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  color: var(--surface-900);
}
.blog-usecase p {
  font-size: 0.88rem !important;
  color: var(--surface-500) !important;
  line-height: 1.5 !important;
  margin: 0 !important;
}
.blog-usecase .blog-usecase-ferros {
  color: var(--brand-400) !important;
  font-weight: 600;
  margin-top: 8px !important;
  display: block;
}

/* ── PRIVACY TIERS (blog) ── */
.blog-privacy-tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 32px 0;
}
.blog-privacy-tier {
  padding: 24px;
  border-radius: var(--r);
  border: 1px solid var(--border-subtle);
  background: var(--surface-50);
  text-align: center;
}
.blog-privacy-tier-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.blog-tier-transparent .blog-privacy-tier-badge {
  background: rgba(20,184,166,0.15); color: var(--brand-400);
}
.blog-tier-confidential .blog-privacy-tier-badge {
  background: rgba(192,132,252,0.15); color: #c084fc;
}
.blog-tier-private .blog-privacy-tier-badge {
  background: rgba(251,191,36,0.15); color: #fbbf24;
}
.blog-privacy-tier h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
  color: var(--surface-900);
}
.blog-privacy-tier p {
  font-size: 0.82rem !important;
  color: var(--surface-500) !important;
  line-height: 1.5 !important;
  margin: 0 !important;
}

/* ── SECTION BACKGROUNDS ── */
.article-content section:nth-of-type(even) {
  background: var(--surface-50);
  margin-left: -32px;
  margin-right: -32px;
  padding: 48px 32px;
  border-radius: var(--r-lg);
}

/* ── CLOSING ── */
.article-closing {
  font-size: 1.15rem !important;
  font-weight: 600;
  color: var(--surface-800) !important;
}
.article-sign-off {
  font-style: italic;
  color: var(--surface-500) !important;
  margin-top: 48px !important;
}

/* ── CONTACT MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.modal {
  background: var(--surface-50);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg, 16px);
  padding: 40px;
  width: 100%;
  max-width: 560px;
  position: relative;
  transform: translateY(16px);
  transition: transform 0.25s;
}
.modal-overlay.open .modal {
  transform: translateY(0);
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--surface-500);
  cursor: pointer;
  padding: 4px;
  transition: color 0.2s;
}
.modal-close:hover {
  color: var(--surface-900);
}
.contact-heading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--surface-900);
  margin: 0 0 8px;
}
.contact-subheading {
  font-size: 0.9rem !important;
  color: var(--surface-500) !important;
  margin: 0 0 28px !important;
}

/* ── NEWSLETTER ── */
.newsletter-section {
  margin-top: 56px;
  padding: 36px;
  border-radius: var(--r);
  border: 1px solid var(--border-subtle);
  background: var(--surface-50);
  text-align: center;
}
.newsletter-heading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--surface-900);
  margin: 0 0 8px;
}
.newsletter-subheading {
  font-size: 0.9rem !important;
  color: var(--surface-500) !important;
  margin: 0 0 24px !important;
}
.newsletter-form {
  display: flex;
  gap: 10px;
  max-width: 440px;
  margin: 0 auto;
}
.newsletter-form input {
  flex: 1;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--surface-100);
  color: var(--surface-900);
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.newsletter-form input::placeholder {
  color: var(--surface-400);
}
.newsletter-form input:focus {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(20,184,166,0.15);
}
.newsletter-form button {
  padding: 12px 28px;
  border-radius: 8px;
  border: none;
  background: var(--brand-500);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s, transform 0.15s;
}
.newsletter-form button:hover {
  background: var(--brand-400);
  transform: translateY(-1px);
}
.newsletter-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.contact-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.contact-field label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--surface-500);
}
.contact-field input,
.contact-field textarea {
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--surface-100);
  color: var(--surface-900);
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.contact-field input::placeholder,
.contact-field textarea::placeholder {
  color: var(--surface-400);
}
.contact-field input:focus,
.contact-field textarea:focus {
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(20,184,166,0.15);
}
.contact-field textarea {
  resize: vertical;
  min-height: 100px;
}
.contact-submit {
  align-self: flex-start;
  padding: 12px 32px;
  border-radius: 8px;
  border: none;
  background: var(--brand-500);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.contact-submit:hover {
  background: var(--brand-400);
  transform: translateY(-1px);
}
.contact-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.contact-status {
  font-size: 0.85rem !important;
  margin: 0 !important;
  min-height: 1.2em;
}
.contact-status.success {
  color: var(--brand-400) !important;
}
.contact-status.error {
  color: #ef4444 !important;
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .toc {
    display: none;
  }
  .article-content {
    padding: 100px 0 80px;
  }
}
@media (max-width: 768px) {
  .article-title { font-size: 2rem; }
  .article-lede { font-size: 1.05rem; }
  .article-content { padding: 90px 0 80px; }
  .article-content p { font-size: 1rem; }
  .article-content h2 { font-size: 1.5rem; }
  .pullquote { margin-left: 0; }
  .pullquote p { font-size: 1.15rem !important; }
  .blog-stat-strip { grid-template-columns: 1fr; }
  .blog-usecase-grid { grid-template-columns: 1fr; }
  .blog-privacy-tiers { grid-template-columns: 1fr; }
  .article-content section:nth-of-type(even) { margin-left: -16px; margin-right: -16px; padding: 32px 16px; }
  .status-grid { grid-template-columns: 1fr; }
  .invite-cards { grid-template-columns: 1fr; }
  .contact-row { grid-template-columns: 1fr; }
  .modal { padding: 28px 20px; }
  .newsletter-form { flex-direction: column; }
  .newsletter-section { padding: 28px 20px; }
  .article-divider { margin: 48px 0; }
}

/* ══════════════════════════════════════
   THE FORGE — BLOG INDEX
   ══════════════════════════════════════ */

/* ── HEADER ── */
.forge-header {
  padding: 160px 0 64px;
}
.forge-identity {
  max-width: 640px;
}
.forge-title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 20px;
}
.forge-tagline {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--surface-500);
  max-width: 480px;
}

/* ── POST LIST ── */
.forge-posts {
  padding: 0 0 80px;
}
.post-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 760px;
}

/* ── POST CARD ── */
.post-card {
  display: block;
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  transition: all 0.3s;
}
.post-card:last-child {
  border-bottom: 1px solid var(--border-subtle);
}
.post-card-inner {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.post-card:hover .post-card-inner {
  transform: translateX(8px);
}
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--surface-400);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.3px;
}
.post-card-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--surface-900);
  margin-bottom: 12px;
  transition: color 0.2s;
}
.post-card:hover .post-card-title {
  color: var(--brand-400);
}
.post-card-excerpt {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--surface-500);
  max-width: 600px;
  margin-bottom: 20px;
}
.post-card-read {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-400);
  transition: gap 0.2s;
}
.post-card:hover .post-card-read {
  gap: 10px;
}

/* ── NEWSLETTER (index) ── */
.forge-newsletter {
  padding: 0 0 120px;
}
.forge-newsletter .newsletter-section {
  max-width: 760px;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .forge-header { padding: 120px 0 48px; }
  .forge-title { font-size: 2.4rem; }
  .forge-tagline { font-size: 1rem; }
  .post-card { padding: 28px 0; }
  .post-card-title { font-size: 1.3rem; }
  .post-card-excerpt { font-size: 0.92rem; }
  .forge-newsletter { padding: 0 0 80px; }
}