/* ═══════════════════════════════════════════════════════════════════
   BLOGS PAGE — blogs.css
   Extends styles.css — inherits all CSS custom properties and base
   ═══════════════════════════════════════════════════════════════════ */

/* ── Blog Hero ───────────────────────────────────────────────────── */
.blog-hero {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-height: 38vh;
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 4vw, 3rem) clamp(2rem, 4vw, 3.5rem);
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
}

.blog-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.28);
  border-radius: 999px;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  padding: 0.32rem 0.9rem;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.blog-hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-strong);
  animation: pulse-dot 2s ease-in-out infinite;
}

.blog-hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.0;
  max-width: 16ch;
  margin-bottom: 1.1rem;
  letter-spacing: -0.02em;
}

.blog-hero-sub {
  color: var(--muted);
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  line-height: 1.7;
  max-width: 52ch;
  margin-bottom: 0;
}

/* ── Blog Controls Bar ───────────────────────────────────────────── */
.blog-controls {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem) 2.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.blog-search-wrap {
  position: relative;
  flex: 1;
  min-width: 220px;
  max-width: 400px;
}

.blog-search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--quiet);
  pointer-events: none;
  display: flex;
  align-items: center;
}

.blog-search {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.65rem 1rem 0.65rem 2.6rem;
  outline: none;
  transition: border-color 220ms ease, box-shadow 220ms ease;
}

.blog-search::placeholder { color: var(--quiet); }

.blog-search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.blog-category-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.blog-cat-btn {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  min-height: 2.3rem;
  padding: 0.45rem 0.85rem;
  transition: background 220ms ease, border-color 220ms ease, color 220ms ease;
}

.blog-cat-btn:hover,
.blog-cat-btn.active {
  background: var(--panel);
  border-color: var(--accent);
  color: var(--text);
}

.blog-cat-btn.active {
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent-strong);
}

.blog-count {
  margin-left: auto;
  color: var(--quiet);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

/* ── Blog Grid + Cards ───────────────────────────────────────────── */
.blog-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem) clamp(4rem, 6vw, 6rem);
}

.blog-featured-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.blog-featured-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* Featured (first) card — full width */
.blog-card--featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  margin-bottom: 2.5rem;
  position: relative;
  transition: border-color 250ms ease, box-shadow 250ms ease, transform 250ms ease;
  min-height: 340px;
}

.blog-card--featured:hover {
  border-color: rgba(37, 99, 235, 0.4);
  box-shadow: 0 20px 56px rgba(0, 0, 0, 0.38);
  transform: translateY(-4px);
}

.blog-card--featured .blog-card-visual {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a1a2e 100%);
  position: relative;
  overflow: hidden;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card-visual-icon {
  font-size: 4.5rem;
  opacity: 0.18;
  user-select: none;
  pointer-events: none;
}

/* Animated grid pattern on featured visual */
.blog-card--featured .blog-card-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  animation: grid-drift 18s linear infinite;
}

.blog-card--featured .blog-card-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 70% at 50% 50%, rgba(37,99,235,0.14) 0%, transparent 70%);
}

@keyframes grid-drift {
  from { background-position: 0 0; }
  to   { background-position: 32px 32px; }
}

.blog-card--featured .blog-card-body {
  padding: 2.5rem 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.9rem;
}

/* Regular card grid */
.blog-grid-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--quiet);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.blog-grid-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

/* Standard blog card */
.blog-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  transition: border-color 250ms ease, box-shadow 250ms ease, transform 250ms ease;
  cursor: pointer;
}

.blog-card:hover {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.32);
  transform: translateY(-4px);
}

/* Revolving glow on hover — same pattern as project cards */
.blog-card-glow {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.blog-card-glow::before {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: conic-gradient(
    from 0deg,
    transparent 0%, transparent 42%,
    #1d4ed8 56%, #3b82f6 60%, #bfdbfe 62%, #3b82f6 64%, #1d4ed8 68%,
    transparent 80%, transparent 100%
  );
  opacity: 0;
  animation: cardSpin 2.2s linear infinite;
  animation-play-state: paused;
  transition: opacity 0.3s ease;
}

.blog-card-glow::after {
  content: "";
  position: absolute;
  inset: 2px;
  background: var(--panel);
  border-radius: 18px;
}

@keyframes cardSpin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.blog-card:hover .blog-card-glow::before {
  opacity: 1;
  animation-play-state: running;
}

/* Card visual strip */
.blog-card-thumb {
  height: 148px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.blog-card-thumb-emoji {
  font-size: 2.8rem;
  opacity: 0.22;
  user-select: none;
  pointer-events: none;
  position: relative;
  z-index: 1;
}

.blog-card-thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.07) 1px, transparent 1px);
  background-size: 24px 24px;
}

.blog-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.6rem;
  position: relative;
  z-index: 1;
}

/* Card top-line category tag */
.blog-card-category {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.blog-card-category-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.blog-card h3 {
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 0;
}

.blog-card--featured .blog-card-body h3 {
  font-size: 1.55rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.blog-card-excerpt {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.65;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card--featured .blog-card-excerpt {
  -webkit-line-clamp: 4;
  font-size: 0.95rem;
}

/* Card footer meta */
.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.blog-card-date,
.blog-card-read {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--quiet);
  font-size: 0.76rem;
  font-weight: 600;
}

.blog-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-left: auto;
}

.blog-card-tag {
  background: var(--secondary-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.18rem 0.5rem;
}

/* Read more link */
.blog-read-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 800;
  margin-top: 0.4rem;
  transition: gap 200ms ease, color 200ms ease;
}

.blog-read-link:hover {
  gap: 0.65rem;
  color: var(--accent);
}

.blog-read-link svg {
  flex-shrink: 0;
  transition: transform 200ms ease;
}

.blog-read-link:hover svg {
  transform: translateX(3px);
}

/* ── Coming Soon / Empty State ───────────────────────────────────── */
.blog-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
  gap: 1rem;
  color: var(--quiet);
  display: none;
}

.blog-empty.visible { display: flex; }

.blog-empty-icon {
  font-size: 3rem;
  opacity: 0.4;
}

.blog-empty p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* ── Newsletter / Subscribe CTA ─────────────────────────────────── */
.blog-subscribe-section {
  padding: clamp(3rem, 6vw, 6rem) clamp(1rem, 4vw, 3rem);
  position: relative;
}

/* Pattern behind the card so backdrop-filter has something to blur */
.blog-subscribe-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 80% at 20% 50%, rgba(99, 120, 255, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 40% 70% at 80% 30%, rgba(160, 100, 255, 0.14) 0%, transparent 60%),
    radial-gradient(ellipse 35% 60% at 60% 80%, rgba(50, 180, 255, 0.12) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.blog-subscribe-card {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(40px) saturate(180%) brightness(1.4);
  -webkit-backdrop-filter: blur(40px) saturate(180%) brightness(1.4);
  border: 1px solid rgba(255, 255, 255, 0.30);
  border-radius: 28px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  box-shadow:
    0 8px 40px rgba(0, 0, 0, 0.20),
    inset 0 1.5px 0 rgba(255, 255, 255, 0.55),
    inset 0 -1px 0 rgba(255, 255, 255, 0.08);
}

.blog-subscribe-glow {
  display: none;
}

.blog-subscribe-left {
  position: relative;
  z-index: 1;
  padding: clamp(2rem, 4vw, 3.5rem);
  border-right: 1px solid rgba(255, 255, 255, 0.10);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.blog-subscribe-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(37,99,235,0.10);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: 999px;
  color: var(--accent-strong);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.28rem 0.85rem;
  width: fit-content;
}

.blog-subscribe-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-strong);
  animation: pulse-dot 2s ease-in-out infinite;
}

.blog-subscribe-left h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
}

.blog-subscribe-desc {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.72;
  margin: 0;
}

.blog-subscribe-perks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.blog-subscribe-perks li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
}

.blog-subscribe-perks li svg {
  flex-shrink: 0;
  color: var(--accent-strong);
}

.blog-subscribe-right {
  position: relative;
  z-index: 1;
  padding: clamp(2rem, 4vw, 3.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.4rem;
}

.blog-subscribe-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.blog-subscribe-topics span {
  background: var(--secondary-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
}

.blog-subscribe-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}

.blog-subscribe-input-row {
  position: relative;
  margin-bottom: 0.75rem;
}

.blog-subscribe-input-icon {
  position: absolute;
  left: 0.95rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--quiet);
  display: flex;
  align-items: center;
  pointer-events: none;
}

.blog-subscribe-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.82rem 1rem 0.82rem 2.65rem;
  outline: none;
  transition: border-color 220ms ease, box-shadow 220ms ease;
  box-sizing: border-box;
}

.blog-subscribe-input::placeholder { color: var(--quiet); }

.blog-subscribe-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.14);
}

.blog-subscribe-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  background: var(--accent);
  border: none;
  border-radius: 14px;
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 800;
  padding: 0.85rem 1.4rem;
  transition: background 220ms ease, transform 200ms ease, box-shadow 220ms ease;
}

.blog-subscribe-btn:hover {
  background: var(--accent-strong);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.35);
}

.blog-subscribe-btn svg {
  flex-shrink: 0;
  transition: transform 200ms ease;
}

.blog-subscribe-btn:hover svg {
  transform: translateX(3px);
}

.blog-subscribe-note {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.76rem;
  color: var(--quiet);
  margin: 0;
}

.blog-subscribe-note svg {
  flex-shrink: 0;
  color: var(--quiet);
}

@media (max-width: 760px) {
  .blog-subscribe-card {
    grid-template-columns: 1fr;
  }
  .blog-subscribe-left {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
  }
}

/* ── Color themes for card thumbnails ────────────────────────────── */
.blog-thumb-blue   { background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%); }
.blog-thumb-purple { background: linear-gradient(135deg, #130f1a 0%, #2d1b4e 100%); }
.blog-thumb-teal   { background: linear-gradient(135deg, #0a1f1f 0%, #0d4040 100%); }
.blog-thumb-amber  { background: linear-gradient(135deg, #1a1200 0%, #3d2c00 100%); }
.blog-thumb-rose   { background: linear-gradient(135deg, #1a0a0a 0%, #3d1515 100%); }
.blog-thumb-green  { background: linear-gradient(135deg, #0a1a0a 0%, #0d3d1b 100%); }
.blog-thumb-indigo { background: linear-gradient(135deg, #0d0f26 0%, #1a1f5e 100%); }

/* ── Stagger animation ───────────────────────────────────────────── */
.blog-card {
  animation: rise-in 350ms ease both;
}

.blog-grid .blog-card:nth-child(1) { animation-delay: 0ms; }
.blog-grid .blog-card:nth-child(2) { animation-delay: 80ms; }
.blog-grid .blog-card:nth-child(3) { animation-delay: 160ms; }
.blog-grid .blog-card:nth-child(4) { animation-delay: 240ms; }
.blog-grid .blog-card:nth-child(5) { animation-delay: 320ms; }
.blog-grid .blog-card:nth-child(6) { animation-delay: 400ms; }

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .blog-card--featured {
    grid-template-columns: 1fr;
  }

  .blog-card--featured .blog-card-visual {
    min-height: 200px;
  }

  .blog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .blog-hero h1 {
    font-size: clamp(1.9rem, 7.5vw, 2.6rem);
  }

  .blog-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .blog-search-wrap {
    max-width: 100%;
  }

  .blog-category-group {
    width: 100%;
  }

  .blog-cat-btn {
    flex: 1;
    text-align: center;
  }

  .blog-count {
    margin-left: 0;
    text-align: right;
  }

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

  .blog-card--featured .blog-card-body {
    padding: 1.5rem 1.25rem;
  }

  .blog-card--featured .blog-card-body h3 {
    font-size: 1.2rem;
  }

  .blog-subscribe-form {
    flex-direction: column;
  }

  .blog-subscribe-btn {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .blog-hero {
    padding-top: 3rem;
  }

  .blog-card-body {
    padding: 1.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blog-card-glow::before { animation: none !important; opacity: 0 !important; }
  .blog-card--featured .blog-card-visual::before { animation: none; }
  .blog-card { animation: none; }
}