/* ═══════════════════════════════════════════════════════════
   NexusChat — Blog Page Stylesheet
═══════════════════════════════════════════════════════════ */

/* ── HERO ─────────────────────────────────────────────────── */
.blog-hero { background: linear-gradient(180deg, rgba(240,160,48,0.04) 0%, transparent 100%); }

/* ── FILTER BAR ───────────────────────────────────────────── */
.blog-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 64px;
  z-index: 90;
  flex-wrap: wrap;
}

.blog-filter-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.blog-filter-tab {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: var(--main-bg);
  transition: 0.22s ease;
}
.blog-filter-tab:hover { border-color: var(--accent); color: var(--accent-dark); }
.blog-filter-tab.active {
  background: var(--text-primary);
  border-color: var(--text-primary);
  color: #fff;
}

.blog-search-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--main-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  color: var(--text-muted);
  min-width: 220px;
  transition: 0.22s ease;
}
.blog-search-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.blog-search-wrap input {
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--text-primary);
  width: 100%;
}
.blog-search-wrap input::placeholder { color: var(--text-muted); }

/* ── FEATURED POST ───────────────────────────────────────── */
.blog-featured {
  padding: 48px 40px 0;
}

.blog-hero-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--card-shadow-hover);
  transition: 0.22s ease;
}
.blog-hero-card:hover { box-shadow: 0 16px 48px rgba(0,0,0,0.12); }

.blog-hero-card__img {
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.blog-hero-card__img-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  color: rgba(255,255,255,0.5);
}

.blog-hero-card__img-text span:first-child {
  font-size: 48px;
  color: var(--accent);
  line-height: 1;
}

.blog-hero-card__img-text span:last-child {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.blog-hero-card__body {
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.blog-hero-card__body h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.3;
  margin: 12px 0 14px;
}

.blog-hero-card__body > p {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.blog-read-link {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent-dark);
  margin-top: auto;
  transition: 0.2s;
  align-self: flex-start;
}
.blog-read-link:hover { color: var(--accent); }

/* ── BLOG META ELEMENTS ──────────────────────────────────── */
.blog-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.blog-tag {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 4px;
}

.blog-tag--product  { background: #eff6ff; color: #1d4ed8; }
.blog-tag--research { background: #faf5ff; color: #7e22ce; }
.blog-tag--safety   { background: #f0fdf4; color: #166534; }
.blog-tag--creator  { background: #fff7ed; color: #c2410c; }
.blog-tag--company  { background: #fefce8; color: #a16207; }

.blog-date, .blog-read-time {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.blog-author {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.blog-author img {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--border-subtle);
  flex-shrink: 0;
}

.blog-author strong {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
}

.blog-author span {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.blog-author--sm {
  display: flex;
  align-items: center;
  gap: 8px;
}

.blog-author--sm img {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--border-subtle);
}

.blog-author--sm span {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* ── BLOG GRID ───────────────────────────────────────────── */
.blog-grid-section {
  padding: 48px 40px;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: 0.22s ease;
  box-shadow: var(--card-shadow);
  cursor: pointer;
  animation: fadeUp 0.4s ease backwards;
}

.blog-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-3px);
  border-color: rgba(240,160,48,0.25);
}

/* Stagger animations */
.blog-card:nth-child(1) { animation-delay: 0.05s; }
.blog-card:nth-child(2) { animation-delay: 0.10s; }
.blog-card:nth-child(3) { animation-delay: 0.15s; }
.blog-card:nth-child(4) { animation-delay: 0.20s; }
.blog-card:nth-child(5) { animation-delay: 0.25s; }
.blog-card:nth-child(6) { animation-delay: 0.30s; }
.blog-card:nth-child(7) { animation-delay: 0.35s; }
.blog-card:nth-child(8) { animation-delay: 0.40s; }
.blog-card:nth-child(9) { animation-delay: 0.45s; }

.blog-card__img {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card__img--product  { background: linear-gradient(135deg, #0a1030, #102060); }
.blog-card__img--research { background: linear-gradient(135deg, #1a0a30, #350060); }
.blog-card__img--safety   { background: linear-gradient(135deg, #001a10, #003020); }
.blog-card__img--creator  { background: linear-gradient(135deg, #1a0800, #3a1500); }
.blog-card__img--company  { background: linear-gradient(135deg, #1a1000, #352000); }

.blog-card__img-icon {
  font-size: 42px;
  opacity: 0.7;
}

.blog-card__body { padding: 20px; }

.blog-card__body h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin: 8px 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__body > p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.blog-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

/* ── NO RESULTS ──────────────────────────────────────────── */
.blog-no-results {
  text-align: center;
  padding: 80px 0;
  animation: fadeIn 0.3s ease;
}
.blog-no-results span { font-size: 48px; display: block; margin-bottom: 16px; }
.blog-no-results h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.blog-no-results p { font-size: 0.875rem; color: var(--text-muted); }

/* ── LOAD MORE ───────────────────────────────────────────── */
.blog-load-more {
  text-align: center;
  margin-top: 48px;
}

.btn-load-more {
  padding: 12px 36px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--surface);
  transition: 0.22s ease;
}
.btn-load-more:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  background: var(--accent-subtle);
}
.btn-load-more:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── NEWSLETTER ──────────────────────────────────────────── */
.newsletter-section {
  padding: 0 0 80px;
}

.newsletter-card {
  background: var(--text-primary);
  border-radius: 20px;
  padding: 56px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.newsletter-card::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(240,160,48,0.1), transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.newsletter-icon {
  font-size: 36px;
  display: block;
  margin-bottom: 16px;
}

.newsletter-card h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.newsletter-card > p {
  font-size: 0.925rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 28px;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.newsletter-form { position: relative; z-index: 1; }

.newsletter-input-wrap {
  display: flex;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  overflow: hidden;
  max-width: 460px;
  margin: 0 auto 12px;
  transition: 0.22s ease;
}

.newsletter-input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(240,160,48,0.2);
}

.newsletter-input-wrap input {
  flex: 1;
  padding: 13px 18px;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: #fff;
}

.newsletter-input-wrap input::placeholder { color: rgba(255,255,255,0.3); }

.newsletter-input-wrap button {
  padding: 13px 24px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 0.875rem;
  font-family: var(--font-display);
  transition: 0.22s ease;
  flex-shrink: 0;
}

.newsletter-input-wrap button:hover { background: var(--accent-dark); }

.newsletter-consent {
  font-size: 0.74rem;
  color: rgba(255,255,255,0.25);
  line-height: 1.5;
}
.newsletter-consent a { color: rgba(255,255,255,0.4); text-decoration: underline; }
.newsletter-consent a:hover { color: rgba(255,255,255,0.7); }

.newsletter-success {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px;
  background: rgba(72,200,130,0.1);
  border: 1px solid rgba(72,200,130,0.25);
  border-radius: 10px;
  max-width: 460px;
  margin: 0 auto;
  animation: fadeIn 0.3s ease;
  position: relative;
  z-index: 1;
}
.newsletter-success span { font-size: 20px; color: var(--accent); }
.newsletter-success p { font-size: 0.875rem; color: rgba(255,255,255,0.7); }

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 1280px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-hero-card { grid-template-columns: 1fr; }
  .blog-hero-card__img { min-height: 240px; }
  .blog-hero-card__body { padding: 32px 32px; }
  .blog-hero-card__body h2 { font-size: 1.3rem; }
}

@media (max-width: 1024px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-filter-bar { gap: 12px; }
  .blog-filter-tabs { gap: 4px; }
  .blog-filter-tab { padding: 6px 14px; font-size: 0.78rem; }
  .blog-hero-card__body h2 { font-size: 1.2rem; }
  .blog-hero-card__body > p { font-size: 0.875rem; }
  .blog-card__img { height: 140px; }
  .blog-card__img-icon { font-size: 36px; }
  .blog-card__body h3 { font-size: 0.9rem; }
  .newsletter-card h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); }
  .newsletter-card > p { font-size: 0.875rem; }
}

@media (max-width: 860px) {
  .blog-filter-bar { top: 0; flex-direction: column; align-items: flex-start; padding: 12px 20px; }
  .blog-search-wrap { min-width: 100%; }
  .blog-featured { padding: 24px 20px 0; }
  .blog-grid-section { padding: 32px 20px; }
  .newsletter-card { padding: 36px 24px; }
  .blog-hero-card__img { min-height: 200px; }
  .blog-hero-card__body { padding: 28px 24px; }
  .blog-hero-card__body h2 { font-size: 1.1rem; }
  .blog-card__body { padding: 16px; }
  .blog-card__body h3 { font-size: 0.85rem; }
  .blog-card__body > p { font-size: 0.78rem; }
  .blog-author--sm span { font-size: 0.74rem; }
  .blog-date, .blog-read-time { font-size: 0.72rem; }
  .btn-load-more { padding: 10px 32px; font-size: 0.82rem; }
}

@media (max-width: 640px) {
  .blog-grid { grid-template-columns: 1fr; }
  .newsletter-input-wrap { flex-direction: column; border-radius: 10px; }
  .newsletter-input-wrap button { border-radius: 0 0 9px 9px; }
  .blog-filter-tabs { flex-wrap: wrap; }
  .blog-filter-tab { flex: 1 1 calc(50% - 2px); text-align: center; }
  .blog-hero-card__img { min-height: 180px; }
  .blog-hero-card__body { padding: 24px 20px; }
  .blog-hero-card__body h2 { font-size: 1rem; }
  .blog-card__img { height: 120px; }
  .blog-card__img-icon { font-size: 32px; }
  .blog-card__body h3 { font-size: 0.8rem; }
  .blog-card__body > p { font-size: 0.74rem; }
  .newsletter-card { padding: 32px 20px; }
  .newsletter-card h2 { font-size: clamp(1.2rem, 3vw, 1.5rem); }
  .newsletter-input-wrap input { padding: 12px 16px; font-size: 0.82rem; }
  .newsletter-input-wrap button { padding: 12px 20px; font-size: 0.82rem; }
  .newsletter-consent { font-size: 0.7rem; }
}

@media (max-width: 400px) {
  .blog-filter-tab { flex: 1 1 100%; }
  .blog-hero-card__img { min-height: 160px; }
  .blog-hero-card__body { padding: 20px 16px; }
  .blog-hero-card__body h2 { font-size: 0.95rem; }
  .blog-hero-card__body > p { font-size: 0.8rem; }
  .blog-card__img { height: 100px; }
  .blog-card__img-icon { font-size: 28px; }
  .blog-card__body { padding: 14px; }
  .blog-card__body h3 { font-size: 0.78rem; }
  .blog-card__body > p { font-size: 0.7rem; }
  .btn-load-more { padding: 8px 28px; font-size: 0.78rem; }
  .newsletter-card { padding: 28px 16px; }
  .newsletter-card h2 { font-size: 1.1rem; }
  .newsletter-card > p { font-size: 0.8rem; }
  .newsletter-input-wrap input { padding: 10px 14px; }
  .newsletter-input-wrap button { padding: 10px 16px; }
}

@media (max-width: 320px) {
  .blog-hero-card__body h2 { font-size: 0.9rem; }
  .blog-hero-card__body > p { font-size: 0.76rem; }
  .blog-card__body h3 { font-size: 0.74rem; }
  .blog-card__body > p { font-size: 0.68rem; }
  .newsletter-card h2 { font-size: 1rem; }
  .newsletter-card > p { font-size: 0.76rem; }
  .newsletter-consent { font-size: 0.66rem; }
}