/* =============================================
   BLOG — blog.css
   Extends style.css — do not duplicate base tokens here
   ============================================= */

/* ---- Blog Hero ---- */
.blog-hero {
  padding: 148px 0 80px;
  border-bottom: 1px solid var(--border);
}

.blog-hero-title {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin: 12px 0 20px 0;
}

.blog-hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 440px;
  margin-bottom: 32px;
}

/* ---- Tag filter ---- */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-btn {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.tag-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tag-btn.active {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
}

/* ---- Post list ---- */
.blog-list-section {
  padding: 80px 0 100px 0;
}

.posts-grid {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
}

/* ---- Post card ---- */
.post-card {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 28px 32px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 20px;
  cursor: pointer;
  text-align: left;
  width: 100%;
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text);
  transition: background var(--transition);
}

.posts-grid .post-card:last-child { border-bottom: none; }

.post-card:hover {
  background: var(--surface);
}

.post-card-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.post-card-date {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
}

.post-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.post-card-tag {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 2px 8px;
}

.post-card-title {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  margin: 0;
}

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

.post-card-excerpt {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-arrow {
  font-size: 1.2rem;
  color: var(--muted);
  align-self: center;
  flex-shrink: 0;
}

.post-card:hover .post-card-arrow {
  color: var(--accent);
}

/* ---- Empty state ---- */
.posts-empty {
  text-align: center;
  padding: 60px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---- Active nav link ---- */
.nav-active {
  color: var(--accent) !important;
}

/* ---- Modal ---- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal[hidden] { display: none; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--backdrop);
  cursor: pointer;
}

.modal-panel {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  max-width: 680px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
  padding: 40px;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  width: 32px;
  height: 32px;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), border-color var(--transition);
}

.modal-close:hover {
  color: var(--text);
  border-color: var(--muted);
}

.modal-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.modal-date {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 500;
}

.modal-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.modal-title {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  margin: 0 0 28px 0;
}

.modal-body {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}

.modal-body p {
  margin: 0 0 20px 0;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .post-card {
    grid-template-columns: 1fr;
    padding: 20px 24px;
  }
  .post-card-arrow { display: none; }
  .modal-panel { padding: 24px; }
}