/* ============================================================
   SV INSTITUTE – BLOG LISTING PAGE CSS
   Sections: Hero · Featured · Categories · Grid · CTA · Newsletter
   Page-specific only. Tokens from global.css.
   ============================================================ */

/* ── HERO ─────────────────────────────────────────────────── */
.bl-hero {
  position:   relative;
  overflow:   hidden;
  background: var(--svi-navy);
  padding:    calc(var(--svi-nav-height) + 2.5rem) 0 5rem;
}
.bl-hero__bg {
  position:   absolute;
  inset:      0;
  background:
    radial-gradient(ellipse 70% 60% at 80% 30%, rgba(30,136,229,0.15) 0%, transparent 65%),
    radial-gradient(ellipse 45% 50% at 5% 75%,  rgba(21,101,192,0.12) 0%, transparent 60%),
    linear-gradient(155deg, #0B1C39 0%, #0e2248 60%, #0a1b38 100%);
}
.bl-hero__bg-grid {
  position:   absolute;
  inset:      0;
  background-image:
    linear-gradient(rgba(30,136,229,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,136,229,0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.bl-hero__orb {
  position:      absolute;
  border-radius: 50%;
  pointer-events: none;
  animation:     bl-orb 9s ease-in-out infinite;
}
.bl-hero__orb--1 {
  width: 440px; height: 440px;
  top: -140px; right: -80px;
  background: radial-gradient(circle, rgba(30,136,229,0.10) 0%, transparent 70%);
}
.bl-hero__orb--2 {
  width: 280px; height: 280px;
  bottom: -60px; left: 5%;
  background: radial-gradient(circle, rgba(21,101,192,0.09) 0%, transparent 70%);
  animation-delay: 3.5s;
}
@keyframes bl-orb {
  0%,100%  { transform: translate(0,0); }
  40%      { transform: translate(14px,-18px); }
  70%      { transform: translate(-8px,10px); }
}

.bl-hero__inner {
  position:  relative;
  z-index:   2;
  max-width: 760px;
}

/* Breadcrumb */
.bl-breadcrumb {
  display:     flex;
  align-items: center;
  flex-wrap:   wrap;
  gap:         0.3rem;
  margin-bottom: 1.5rem;
  padding:     0;
}
.bl-breadcrumb li { display: flex; align-items: center; }
.bl-breadcrumb a {
  color:           rgba(255,255,255,0.6);
  font-size:       var(--svi-text-xs);
  font-weight:     500;
  text-decoration: none;
  transition:      color 0.2s;
}
.bl-breadcrumb a:hover   { color: var(--svi-white); }
.bl-breadcrumb__sep      { color: rgba(255,255,255,0.3); font-size: 0.7rem; margin: 0 0.15rem; }
.bl-breadcrumb li:last-child span {
  color:     rgba(255,255,255,0.85);
  font-size: var(--svi-text-xs);
  font-weight: 600;
}

.bl-hero__title {
  font-family:   var(--svi-font-heading);
  font-size:     clamp(1.9rem, 5vw, 3.25rem);
  font-weight:   800;
  line-height:   1.18;
  color:         var(--svi-white);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}
.bl-hero__title-accent {
  color:      transparent;
  background: linear-gradient(90deg, #60A5FA, #93C5FD, #60A5FA);
  background-size: 200%;
  -webkit-background-clip: text;
  background-clip:         text;
  animation:  bl-shimmer 4s ease infinite;
}
@keyframes bl-shimmer {
  0%,100% { background-position: 0%; }
  50%     { background-position: 100%; }
}

.bl-hero__subtitle {
  color:         rgba(255,255,255,0.72);
  font-size:     var(--svi-text-lg);
  line-height:   1.75;
  max-width:     600px;
  margin-bottom: 2rem;
}

/* Search */
.bl-search-wrap {
  position:  relative;
  display:   flex;
  max-width: 580px;
  gap:       0;
}
.bl-search-wrap__icon {
  position:    absolute;
  left:        1rem;
  top:         50%;
  transform:   translateY(-50%);
  color:       var(--svi-text-muted);
  font-size:   1rem;
  z-index:     2;
  pointer-events: none;
}
.bl-search-input {
  flex:          1;
  padding:       0.85rem 1rem 0.85rem 2.75rem;
  font-family:   var(--svi-font-body);
  font-size:     var(--svi-text-sm);
  border:        1.5px solid rgba(255,255,255,0.12);
  border-right:  none;
  border-radius: var(--svi-radius-sm) 0 0 var(--svi-radius-sm);
  background:    rgba(255,255,255,0.07);
  color:         var(--svi-white);
  backdrop-filter: blur(8px);
  outline:       none;
  min-height:    48px;
  transition:    border-color 0.2s, background 0.2s;
}
.bl-search-input::placeholder { color: rgba(255,255,255,0.4); }
.bl-search-input:focus {
  border-color: rgba(30,136,229,0.6);
  background:   rgba(255,255,255,0.10);
}
.bl-search-btn {
  border-radius: 0 var(--svi-radius-sm) var(--svi-radius-sm) 0 !important;
  flex-shrink:   0;
  min-width:     100px;
}

/* Hero stats */
.bl-hero__stats {
  display:     flex;
  align-items: center;
  flex-wrap:   wrap;
  gap:         0.5rem 0;
  margin-top:  2.5rem;
  background:  rgba(255,255,255,0.05);
  border:      1px solid rgba(255,255,255,0.08);
  border-radius: var(--svi-radius-md);
  padding:     1rem 1.5rem;
  max-width:   480px;
  backdrop-filter: blur(8px);
}
.bl-hero__stat {
  display:        flex;
  flex-direction: column;
  align-items:    center;
  flex:           1 1 120px;
  padding:        0.4rem 0.75rem;
}
.bl-hero__stat strong {
  font-family:  var(--svi-font-heading);
  font-size:    var(--svi-text-xl);
  font-weight:  800;
  color:        var(--svi-white);
  line-height:  1;
}
.bl-hero__stat span {
  font-size:  var(--svi-text-xs);
  color:      rgba(255,255,255,0.55);
  margin-top: 0.2rem;
}
.bl-hero__stat-sep {
  width:      1px;
  height:     32px;
  background: rgba(255,255,255,0.12);
  flex-shrink: 0;
}

/* Hero wave */
.bl-hero__wave {
  position: absolute;
  bottom:   -1px;
  left:     0; right: 0;
}
.bl-hero__wave svg { display: block; width: 100%; height: auto; }

/* ── FEATURED ARTICLE ─────────────────────────────────────── */
.bl-featured {
  background:    var(--svi-bg);
  padding-top:   var(--svi-space-xl);
}
.bl-featured__label {
  display:       inline-flex;
  align-items:   center;
  gap:           0.4rem;
  font-family:   var(--svi-font-heading);
  font-size:     var(--svi-text-xs);
  font-weight:   700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color:         var(--svi-blue);
  margin-bottom: 1.25rem;
}

.bl-featured__card {
  display:       grid;
  grid-template-columns: 1fr;
  border-radius: var(--svi-radius-xl);
  overflow:      hidden;
  background:    var(--svi-white);
  box-shadow:    var(--svi-shadow-lg);
  border:        1px solid var(--svi-border);
  transition:    var(--svi-transition-slow);
}
.bl-featured__card:hover {
  box-shadow: 0 24px 72px rgba(0,0,0,0.14);
  transform:  translateY(-4px);
}

.bl-featured__img-wrap {
  position:    relative;
  overflow:    hidden;
  display:     block;
  height:      280px;
  flex-shrink: 0;
}
.bl-featured__img {
  width:      100%;
  height:     100%;
  object-fit: cover;
  display:    block;
  transition: transform 0.5s ease;
}
.bl-featured__card:hover .bl-featured__img { transform: scale(1.04); }
.bl-featured__img-overlay {
  position:   absolute;
  inset:      0;
  background: linear-gradient(to right, rgba(11,28,57,0.35), transparent);
}

.bl-featured__body {
  padding:        var(--svi-space-lg);
  display:        flex;
  flex-direction: column;
  gap:            1rem;
}
.bl-featured__meta {
  display:     flex;
  flex-wrap:   wrap;
  align-items: center;
  gap:         0.75rem;
}
.bl-meta-date, .bl-meta-read {
  display:     flex;
  align-items: center;
  gap:         0.35rem;
  font-size:   var(--svi-text-xs);
  color:       var(--svi-text-muted);
  font-weight: 500;
}
.bl-meta-date i, .bl-meta-read i { color: var(--svi-blue); }

.bl-featured__title {
  font-family:  var(--svi-font-heading);
  font-size:    clamp(1.35rem, 3vw, 2rem);
  font-weight:  800;
  line-height:  1.25;
  color:        var(--svi-navy);
  margin:       0;
}
.bl-featured__title a {
  color:           inherit;
  text-decoration: none;
  transition:      color 0.2s;
}
.bl-featured__title a:hover { color: var(--svi-blue); }

.bl-featured__excerpt {
  font-size:   var(--svi-text-base);
  color:       var(--svi-text-muted);
  line-height: 1.75;
  margin:      0;
}
.bl-featured__footer {
  display:         flex;
  flex-wrap:       wrap;
  align-items:     center;
  justify-content: space-between;
  gap:             1rem;
  padding-top:     1rem;
  border-top:      1px solid var(--svi-border);
  margin-top:      auto;
}

/* Author mini */
.bl-author-mini {
  display:     flex;
  align-items: center;
  gap:         0.65rem;
}
.bl-author-mini__avatar {
  display:          flex;
  align-items:      center;
  justify-content:  center;
  width:            40px;
  height:           40px;
  border-radius:    50%;
  background:       var(--svi-gradient);
  color:            var(--svi-white);
  font-family:      var(--svi-font-heading);
  font-size:        var(--svi-text-xs);
  font-weight:      800;
  flex-shrink:      0;
}
.bl-author-mini div strong {
  display:     block;
  font-size:   var(--svi-text-sm);
  font-weight: 700;
  color:       var(--svi-navy);
}
.bl-author-mini div span {
  display:   block;
  font-size: var(--svi-text-xs);
  color:     var(--svi-text-muted);
}
.bl-author-mini--sm .bl-author-mini__avatar {
  width: 30px; height: 30px; font-size: 0.65rem;
}
.bl-author-mini--sm span {
  font-size:  var(--svi-text-xs);
  color:      var(--svi-text-muted);
  font-weight: 500;
}

/* ── CATEGORY FILTERS ─────────────────────────────────────── */
.bl-categories { background: var(--svi-white); border-bottom: 1px solid var(--svi-border); padding: 1.25rem 0; }
.bl-category-filters {
  display:    flex;
  flex-wrap:  wrap;
  gap:        0.5rem;
  align-items: center;
}
.bl-filter-btn {
  display:        inline-flex;
  align-items:    center;
  gap:            0.4rem;
  padding:        0.55rem 1.1rem;
  border:         1.5px solid var(--svi-border);
  border-radius:  var(--svi-radius-pill);
  background:     var(--svi-white);
  color:          var(--svi-text-muted);
  font-family:    var(--svi-font-heading);
  font-size:      var(--svi-text-xs);
  font-weight:    600;
  cursor:         pointer;
  transition:     var(--svi-transition);
  white-space:    nowrap;
  min-height:     40px;
}
.bl-filter-btn i { font-size: 0.8rem; }
.bl-filter-btn:hover {
  border-color: var(--svi-blue);
  color:        var(--svi-blue);
  background:   var(--svi-blue-light);
}
.bl-filter-btn.is-active {
  background:   var(--svi-navy);
  color:        var(--svi-white);
  border-color: var(--svi-navy);
  box-shadow:   var(--svi-shadow-sm);
}

/* Category badges (on cards) */
.bl-category-badge {
  display:      inline-flex;
  align-items:  center;
  gap:          0.3rem;
  padding:      0.3rem 0.75rem;
  border-radius: var(--svi-radius-pill);
  font-size:    var(--svi-text-xs);
  font-weight:  700;
}
.bl-category-badge--neet        { background: #FEF3C7; color: #92400E; }
.bl-category-badge--engineering { background: #EDE9FE; color: #5B21B6; }
.bl-category-badge--mbbs        { background: #DCFCE7; color: #166534; }
.bl-category-badge--banking     { background: #FEE2E2; color: #991B1B; }
.bl-category-badge--career      { background: #E0F2FE; color: #075985; }

/* ── BLOG GRID ────────────────────────────────────────────── */
.bl-grid-section { background: var(--svi-bg); }
.bl-grid-header {
  display:         flex;
  align-items:     baseline;
  justify-content: space-between;
  gap:             1rem;
  flex-wrap:       wrap;
  margin-bottom:   2rem;
}
.bl-grid-header__title {
  font-size:   var(--svi-text-2xl);
  font-weight: 800;
  color:       var(--svi-navy);
  margin:      0;
}
.bl-grid-header__count {
  font-size:  var(--svi-text-sm);
  color:      var(--svi-text-muted);
  margin:     0;
}

/* Grid */
.bl-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap:     1.75rem;
}

/* Blog card */
.bl-card {
  background:     var(--svi-white);
  border-radius:  var(--svi-radius-lg);
  border:         1px solid var(--svi-border);
  overflow:       hidden;
  display:        flex;
  flex-direction: column;
  height:         100%;
  transition:     var(--svi-transition-slow);
}
.bl-card:hover {
  transform:   translateY(-5px);
  box-shadow:  var(--svi-shadow-lg);
  border-color: transparent;
}

/* Cards in filter-hidden state */
.bl-card.is-hidden {
  display: none;
}

.bl-card__img-wrap {
  position:    relative;
  overflow:    hidden;
  display:     block;
  height:      200px;
  flex-shrink: 0;
  text-decoration: none;
}
.bl-card__img {
  width:      100%;
  height:     100%;
  object-fit: cover;
  display:    block;
  transition: transform 0.45s ease;
}
.bl-card:hover .bl-card__img { transform: scale(1.05); }

.bl-card__category {
  position:      absolute;
  top:           0.85rem;
  left:          0.85rem;
  display:       inline-flex;
  align-items:   center;
  gap:           0.3rem;
  padding:       0.28rem 0.65rem;
  border-radius: var(--svi-radius-pill);
  font-size:     var(--svi-text-xs);
  font-weight:   700;
  backdrop-filter: blur(6px);
}
.bl-card__category--neet        { background: rgba(254,243,199,0.92); color: #92400E; }
.bl-card__category--engineering { background: rgba(237,233,254,0.92); color: #5B21B6; }
.bl-card__category--mbbs        { background: rgba(220,252,231,0.92); color: #166534; }
.bl-card__category--banking     { background: rgba(254,226,226,0.92); color: #991B1B; }
.bl-card__category--career      { background: rgba(224,242,254,0.92); color: #075985; }

.bl-card__body {
  padding:        1.25rem;
  display:        flex;
  flex-direction: column;
  gap:            0.65rem;
  flex:           1;
}
.bl-card__meta {
  display:     flex;
  align-items: center;
  gap:         0.4rem;
  font-size:   var(--svi-text-xs);
  color:       var(--svi-text-muted);
  flex-wrap:   wrap;
}
.bl-card__title {
  font-family:  var(--svi-font-heading);
  font-size:    var(--svi-text-base);
  font-weight:  700;
  line-height:  1.4;
  color:        var(--svi-navy);
  margin:       0;
  flex:         1;
}
.bl-card__title a {
  color:           inherit;
  text-decoration: none;
  transition:      color 0.2s;
}
.bl-card__title a:hover { color: var(--svi-blue); }
.bl-card__excerpt {
  font-size:   var(--svi-text-sm);
  color:       var(--svi-text-muted);
  line-height: 1.7;
  margin:      0;
  display:     -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow:    hidden;
}
.bl-card__footer {
  display:         flex;
  align-items:     center;
  justify-content: space-between;
  gap:             0.5rem;
  padding-top:     0.85rem;
  border-top:      1px solid var(--svi-border);
  margin-top:      auto;
  flex-wrap:       wrap;
}
.bl-card__read-link {
  display:         inline-flex;
  align-items:     center;
  gap:             0.3rem;
  font-size:       var(--svi-text-xs);
  font-weight:     700;
  color:           var(--svi-blue);
  text-decoration: none;
  white-space:     nowrap;
  transition:      gap 0.2s, color 0.2s;
}
.bl-card__read-link i { transition: transform 0.2s; }
.bl-card:hover .bl-card__read-link i { transform: translateX(3px); }

/* No results */
.bl-no-results {
  text-align:  center;
  padding:     3rem 1rem;
}
.bl-no-results i {
  font-size:     2.5rem;
  color:         var(--svi-border);
  display:       block;
  margin-bottom: 1rem;
}
.bl-no-results p {
  color:         var(--svi-text-muted);
  margin-bottom: 1.5rem;
}
.bl-no-results[hidden] { display: none; }

/* Load more */
.bl-load-more {
  text-align:  center;
  margin-top:  2.5rem;
}

/* ── CTA SECTION ──────────────────────────────────────────── */
.bl-cta-section {
  position:  relative;
  overflow:  hidden;
  background: var(--svi-white);
}
.bl-cta-section__bg {
  position:   absolute;
  inset:      0;
  background: var(--svi-gradient-dark);
  clip-path:  polygon(0 0, 100% 0, 100% 75%, 0 100%);
}
.bl-cta-section .container { position: relative; z-index: 2; }

.bl-cta-section__content { }
.bl-cta-section__heading {
  font-size:     clamp(1.75rem, 4vw, 2.5rem);
  font-weight:   800;
  color:         var(--svi-white);
  line-height:   1.2;
  margin-bottom: 1rem;
}
.bl-cta-section__heading-accent {
  color:      transparent;
  background: linear-gradient(90deg, #60A5FA, #93C5FD);
  -webkit-background-clip: text;
  background-clip: text;
}
.bl-cta-section__text {
  color:         rgba(255,255,255,0.75);
  font-size:     var(--svi-text-lg);
  line-height:   1.75;
  margin-bottom: 2rem;
  max-width:     480px;
}
.bl-cta-section__btns {
  display:   flex;
  gap:       1rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}

/* WhatsApp btn */
.bl-wa-btn {
  display:         inline-flex;
  align-items:     center;
  justify-content: center;
  gap:             0.5rem;
  font-family:     var(--svi-font-heading);
  font-size:       var(--svi-text-sm);
  font-weight:     600;
  padding:         0.85rem 1.75rem;
  border-radius:   var(--svi-radius-sm);
  border:          2px solid #25D366;
  background:      rgba(37,211,102,0.1);
  color:           #25D366;
  text-decoration: none;
  white-space:     nowrap;
  min-height:      48px;
  transition:      var(--svi-transition);
  cursor:          pointer;
}
.bl-wa-btn:hover {
  background: #25D366;
  color:      var(--svi-white);
  transform:  translateY(-2px);
  box-shadow: 0 8px 28px rgba(37,211,102,0.3);
}
.bl-wa-btn.svi-btn--lg {
  padding:    1rem 2.25rem;
  min-height: 56px;
  font-size:  var(--svi-text-base);
}

.bl-cta-section__trust {
  display:   flex;
  flex-wrap: wrap;
  gap:       0.5rem 1.5rem;
}
.bl-cta-section__trust span {
  display:     flex;
  align-items: center;
  gap:         0.35rem;
  font-size:   var(--svi-text-xs);
  color:       rgba(255,255,255,0.65);
  font-weight: 500;
}
.bl-cta-section__trust i { color: #22C55E; }

/* Newsletter */
.bl-newsletter {
  background:    var(--svi-white);
  border-radius: var(--svi-radius-xl);
  padding:       var(--svi-space-lg);
  box-shadow:    var(--svi-shadow-lg);
  border:        1px solid var(--svi-border);
}
.bl-newsletter__icon {
  display:         inline-flex;
  align-items:     center;
  justify-content: center;
  width:           56px;
  height:          56px;
  border-radius:   var(--svi-radius-md);
  background:      var(--svi-gradient);
  color:           var(--svi-white);
  font-size:       1.5rem;
  margin-bottom:   1rem;
}
.bl-newsletter__title {
  font-family:   var(--svi-font-heading);
  font-size:     var(--svi-text-xl);
  font-weight:   800;
  color:         var(--svi-navy);
  margin-bottom: 0.5rem;
}
.bl-newsletter__text {
  font-size:     var(--svi-text-sm);
  color:         var(--svi-text-muted);
  line-height:   1.7;
  margin-bottom: 1.5rem;
}
.bl-newsletter__form {
  display:        flex;
  flex-direction: column;
  gap:            0.85rem;
}
.bl-newsletter__field { }
.bl-newsletter__submit { }
.bl-newsletter__disclaimer {
  display:     flex;
  align-items: center;
  gap:         0.4rem;
  font-size:   var(--svi-text-xs);
  color:       var(--svi-text-muted);
  margin:      0;
  justify-content: center;
}
.bl-newsletter__disclaimer i { color: var(--svi-blue); }

/* Visually hidden helper */
.visually-hidden {
  position: absolute;
  width:    1px;
  height:   1px;
  padding:  0;
  margin:   -1px;
  overflow: hidden;
  clip:     rect(0,0,0,0);
  border:   0;
}

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (min-width: 576px) {
  .bl-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 992px) {
  .bl-grid { grid-template-columns: repeat(3, 1fr); }
  .bl-featured__card {
    grid-template-columns: 1.1fr 1fr;
  }
  .bl-featured__img-wrap { height: auto; min-height: 360px; }
}
@media (min-width: 1200px) {
  .bl-featured__img-wrap { min-height: 420px; }
}
@media (max-width: 575.98px) {
  .bl-hero { padding-bottom: 4rem; }
  .bl-search-wrap { flex-direction: column; max-width: 100%; }
  .bl-search-input {
    border-right: 1.5px solid rgba(255,255,255,0.12);
    border-radius: var(--svi-radius-sm);
  }
  .bl-search-btn { border-radius: var(--svi-radius-sm) !important; width: 100%; }
  .bl-cta-section__btns { flex-direction: column; }
  .bl-cta-section__btns .btn { width: 100%; justify-content: center; }
  .bl-hero__stat-sep { display: none; }
}
@media (max-width: 991.98px) {
  .bl-hero { padding-top: calc(var(--svi-nav-height-mobile) + 2rem); }
}