/* =========================================================
   KVWEB-09C — Knowledge Center Design System (Hub)
   Scope: .knowledge-page / .knowledge-hub
   ========================================================= */

.knowledge-page {
  --kc-bg: #FFFFFF;
  --kc-bg-soft: #F7F9FC;
  --kc-bg-section: #F2F6FB;
  --kc-surface: #FFFFFF;
  --kc-text: #111827;
  --kc-text-secondary: #374151;
  --kc-muted: #6B7280;
  --kc-border: #E5E7EB;
  --kc-dark: #081120;
  --kc-navy: #101A35;
  --kc-purple: #6D28D9;
  --kc-blue: #2563EB;
  --kc-cyan: #06B6D4;
  --kc-success: #10B981;
  --kc-gradient: linear-gradient(135deg, #6D28D9 0%, #2563EB 100%);
  --kc-hero-gradient:
    radial-gradient(circle at top right, rgba(109, 40, 217, 0.28), transparent 35%),
    radial-gradient(circle at bottom left, rgba(6, 182, 212, 0.18), transparent 35%),
    #081120;
  --kc-radius-sm: 12px;
  --kc-radius-md: 16px;
  --kc-radius-lg: 20px;
  --kc-radius-xl: 24px;
  --kc-shadow-sm: 0 4px 16px rgba(15, 23, 42, 0.05);
  --kc-shadow-md: 0 10px 28px rgba(15, 23, 42, 0.08);
  --kc-shadow-lg: 0 18px 40px rgba(15, 23, 42, 0.12);
  --kc-transition: 0.22s ease;
  --kc-space-1: 4px;
  --kc-space-2: 8px;
  --kc-space-3: 12px;
  --kc-space-4: 16px;
  --kc-space-5: 20px;
  --kc-space-6: 24px;
  --kc-space-8: 32px;
  --kc-space-10: 40px;
  --kc-space-12: 48px;
  --kc-space-16: 64px;
  --kc-space-20: 80px;
  background: var(--kc-bg);
  color: var(--kc-text);
}

body:has(.knowledge-page) .kv-footer {
  background: var(--kc-bg-soft, #F7F9FC);
  margin-top: 0;
}

/* ---- Hero ---- */
.kv-knowledge-hub-hero {
  position: relative;
  margin-top: -76px; /* transparan navbar'ın altına uzansın (.kv-hero ile aynı) */
  padding: 148px 0 48px;
  min-height: 280px;
  max-height: none;
  display: flex;
  align-items: center;
  background: var(--kc-hero-gradient);
  color: #fff;
  overflow-x: clip;
  max-width: 100%;
}

.kv-knowledge-hub-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 48px;
  background: linear-gradient(180deg, transparent, var(--kc-bg));
  pointer-events: none;
}

.kv-knowledge-hub-hero .kv-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--kv-max-width, 1180px);
  min-width: 0;
  box-sizing: border-box;
}

.kv-knowledge-hub-hero h1 {
  max-width: 18ch;
  margin: 0 0 12px;
  font-size: clamp(1.85rem, 3.2vw, 2.55rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.kv-knowledge-hub-lead {
  max-width: 54ch;
  margin: 0 0 24px;
  font-size: 1.05rem;
  line-height: 1.65;
  font-weight: 400;
  color: rgba(226, 242, 255, 0.92);
}

.kv-knowledge-hub-search {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 720px;
  min-width: 0;
  padding: 10px 12px 10px 16px;
  border-radius: 16px;
  background: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--kc-shadow-md);
  box-sizing: border-box;
}

.kv-knowledge-hub-search i {
  color: var(--kc-purple);
  font-size: 1.05rem;
}

.kv-knowledge-hub-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--kc-text);
  font-size: 1rem;
}

.kv-knowledge-hub-search input::placeholder {
  color: var(--kc-muted);
}

.kv-knowledge-hub-search input:focus-visible {
  outline: none;
}

.kv-knowledge-hub-search:focus-within {
  box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.28), var(--kc-shadow-md);
}

/* ---- Chips ---- */
.kv-kc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  max-width: 100%;
  min-width: 0;
}

.kv-kc-chips--hero {
  flex-wrap: wrap;
  overflow-x: auto;
  margin-top: 18px;
  padding-bottom: 4px;
  max-width: 100%;
  min-width: 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.kv-kc-chips--hero::-webkit-scrollbar {
  display: none;
}

.kv-kc-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--kc-border);
  background: #FFFFFF;
  color: var(--kc-text);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  transition: border-color var(--kc-transition), color var(--kc-transition), background var(--kc-transition), transform var(--kc-transition);
}

.kv-kc-chips--hero .kv-kc-chip {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(255, 255, 255, 0.55);
}

.kv-kc-chip:hover {
  border-color: var(--kc-purple);
  color: var(--kc-purple);
  transform: translateY(-1px);
}

.kv-kc-chip:focus-visible {
  outline: 2px solid var(--kc-blue);
  outline-offset: 2px;
}

.kv-kc-chip.is-active {
  border-color: transparent;
  background: var(--kc-gradient);
  color: #FFFFFF;
}

.kv-cat-count {
  margin-left: 2px;
  opacity: 0.72;
  font-size: 0.8em;
  font-weight: 500;
}

/* ---- Sections ---- */
.kv-kc-section {
  padding: 48px 0;
  background: var(--kc-bg);
}

.kv-kc-section--soft {
  background: var(--kc-bg-section);
}

.kv-kc-section-head {
  margin-bottom: 24px;
}

.kv-kc-section-head h2 {
  margin: 0 0 8px;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  font-weight: 700;
  color: var(--kc-navy);
  letter-spacing: -0.015em;
}

.kv-kc-section-head p {
  margin: 0;
  color: var(--kc-text-secondary);
  font-size: 1rem;
  max-width: 48ch;
}

/* ---- Cards ---- */
.kv-knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  align-items: stretch;
}

.kv-knowledge-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  border-radius: 20px;
  overflow: hidden;
  background: var(--kc-surface);
  border: 1px solid var(--kc-border);
  box-shadow: var(--kc-shadow-sm);
  transition: transform var(--kc-transition), border-color var(--kc-transition), box-shadow var(--kc-transition);
}

.kv-knowledge-card:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: rgba(109, 40, 217, 0.45);
  box-shadow: var(--kc-shadow-lg);
}

.kv-knowledge-card-media {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--kc-bg-section);
}

.kv-knowledge-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.kv-knowledge-card:hover .kv-knowledge-card-media img {
  transform: scale(1.04);
}

.kv-knowledge-card-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 20px 22px;
  flex: 1;
  min-height: 0;
}

.kv-knowledge-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--kc-muted);
}

.kv-kc-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(109, 40, 217, 0.08);
  color: var(--kc-purple);
  font-size: 0.75rem;
  font-weight: 650;
  position: static;
}

.kv-knowledge-read-time {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.kv-knowledge-card-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.7em;
}

.kv-knowledge-card-title a {
  color: var(--kc-text);
  text-decoration: none;
}

.kv-knowledge-card-title a:hover,
.kv-knowledge-card-title a:focus-visible {
  color: var(--kc-purple);
  outline: none;
}

.kv-knowledge-card-summary {
  margin: 0;
  color: var(--kc-text-secondary);
  line-height: 1.6;
  font-size: 0.95rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.kv-knowledge-card-link {
  margin-top: auto;
  color: var(--kc-blue);
  font-weight: 650;
  text-decoration: none;
  font-size: 0.95rem;
}

.kv-knowledge-card-link:hover,
.kv-knowledge-card-link:focus-visible {
  color: var(--kc-purple);
  outline: none;
}

/* ---- Toolbar / browse ---- */
.kv-knowledge-toolbar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.kv-knowledge-search {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 720px;
  padding: 10px 12px 10px 16px;
  border-radius: 16px;
  background: #FFFFFF;
  border: 1px solid var(--kc-border);
  box-shadow: var(--kc-shadow-sm);
}

.kv-knowledge-search i {
  color: var(--kc-purple);
}

.kv-knowledge-search input[type="search"] {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--kc-text);
  font-size: 0.98rem;
}

.kv-knowledge-search input[type="search"]::placeholder {
  color: var(--kc-muted);
}

.kv-knowledge-search:focus-within {
  border-color: rgba(109, 40, 217, 0.45);
  box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.16);
}

.kv-knowledge-sort {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.kv-knowledge-sort-btn {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--kc-border);
  background: #FFFFFF;
  color: var(--kc-text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: border-color var(--kc-transition), color var(--kc-transition), background var(--kc-transition);
}

.kv-knowledge-sort-btn:hover,
.kv-knowledge-sort-btn:focus-visible {
  border-color: var(--kc-purple);
  color: var(--kc-purple);
  outline: none;
}

.kv-knowledge-sort-btn.is-active {
  border-color: transparent;
  background: var(--kc-gradient);
  color: #FFFFFF;
}

.kv-knowledge-browse-sub {
  margin: 0;
  color: var(--kc-muted);
}

/* ---- CTA ---- */
.kv-hub-cta {
  padding: 40px 36px;
  border-radius: 24px;
  background: var(--kc-gradient);
  box-shadow: var(--kc-shadow-lg);
  color: #FFFFFF;
}

.kv-hub-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  font-weight: 750;
  color: #FFFFFF;
}

.kv-hub-cta > p {
  margin: 0 0 24px;
  max-width: 42ch;
  color: rgba(255, 255, 255, 0.92);
  line-height: 1.65;
  font-size: 1.05rem;
}

.kv-hub-cta .kv-btn-primary {
  background: #FFFFFF;
  color: var(--kc-purple);
  border: 0;
  box-shadow: var(--kc-shadow-sm);
}

.kv-hub-cta .kv-btn-primary:hover,
.kv-hub-cta .kv-btn-primary:focus-visible {
  background: #F8FAFF;
  color: var(--kc-navy);
  outline: none;
}

/* ---- FAQ ---- */
.kv-hub-faq-wrap {
  max-width: 820px;
}

.knowledge-hub .kv-faq-list {
  display: grid;
  gap: 12px;
}

.knowledge-hub .kv-faq-item {
  border-radius: 16px;
  border: 1px solid var(--kc-border);
  background: #FFFFFF;
  box-shadow: var(--kc-shadow-sm);
  overflow: hidden;
}

.knowledge-hub .kv-faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border: 0;
  background: transparent;
  color: var(--kc-text);
  text-align: left;
  font-size: 1rem;
  font-weight: 650;
  cursor: pointer;
}

.knowledge-hub .kv-faq-trigger:focus-visible {
  outline: 2px solid var(--kc-blue);
  outline-offset: -2px;
}

.knowledge-hub .kv-faq-item:has(.kv-faq-trigger[aria-expanded="true"]) {
  background: linear-gradient(135deg, rgba(109, 40, 217, 0.08), rgba(37, 99, 235, 0.08));
  border-color: rgba(109, 40, 217, 0.28);
}

.knowledge-hub .kv-faq-trigger[aria-expanded="true"] i {
  transform: rotate(180deg);
  color: var(--kc-purple);
}

.knowledge-hub .kv-faq-panel {
  padding: 0 18px 16px;
  color: var(--kc-text-secondary);
  line-height: 1.7;
}

.knowledge-hub .kv-faq-panel[hidden] {
  display: none !important;
}

/* ---- Empty / pagination ---- */
.kv-kc-empty {
  text-align: center;
  padding: 48px 24px;
  border-radius: 20px;
  border: 1px solid var(--kc-border);
  background: #FFFFFF;
  box-shadow: var(--kc-shadow-sm);
}

.kv-kc-empty i {
  font-size: 2rem;
  color: var(--kc-purple);
}

.kv-kc-empty p {
  margin: 16px 0 24px;
  color: var(--kc-text-secondary);
  font-size: 1.05rem;
}

.kv-kc-empty-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.kv-knowledge-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.kv-kc-page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--kc-border);
  background: #FFFFFF;
  color: var(--kc-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  transition: border-color var(--kc-transition), color var(--kc-transition), background var(--kc-transition);
}

.kv-kc-page-btn:hover,
.kv-kc-page-btn:focus-visible {
  border-color: var(--kc-purple);
  color: var(--kc-purple);
  outline: none;
}

.kv-kc-page-btn.is-active {
  border-color: transparent;
  background: var(--kc-gradient);
  color: #FFFFFF;
}

.kv-kc-page-btn.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .kv-knowledge-hub-hero {
    padding: 132px 0 40px;
    min-height: 240px;
    max-width: 100%;
  }

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

  /* Hub hero + içerik: site .kv-container ile aynı genişlik/hizalama */
  .kv-knowledge-hub-hero .kv-container,
  .kv-kc-section .kv-container {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }

  .kv-knowledge-hub-hero h1 {
    width: 100%;
    max-width: 100%;
    overflow-wrap: break-word;
    word-break: normal;
  }

  .kv-knowledge-hub-lead {
    width: 100%;
    max-width: 100%;
    overflow-wrap: break-word;
    word-break: normal;
  }

  .kv-knowledge-hub-search,
  .kv-knowledge-search {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }

  .kv-kc-chips--hero {
    flex-wrap: wrap;
    overflow-x: visible;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    gap: 8px;
  }

  .kv-knowledge-card,
  .kv-knowledge-grid {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
  }

  .kv-knowledge-card img,
  .kv-knowledge-card-media img {
    max-width: 100%;
    height: auto;
  }
}

/* Tablet: site container padding (32px) ile hizalı — ayrı max-width yok */
@media (min-width: 768px) and (max-width: 1024px) {
  .kv-knowledge-hub-hero .kv-container,
  .kv-kc-section .kv-container {
    max-width: 100%;
    margin-inline: auto;
  }

  .kv-knowledge-hub-hero h1 {
    font-size: clamp(1.85rem, 3.6vw, 2.35rem);
  }
}

@media (max-width: 768px) {
  .kv-knowledge-hub-hero h1 {
    font-size: clamp(1.65rem, 7.5vw, 2.2rem);
    width: 100%;
    max-width: 100%;
  }

  .kv-knowledge-hub-search,
  .kv-knowledge-search {
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .kv-knowledge-hub-hero {
    padding: 124px 0 36px;
    min-height: 220px;
  }

  .kv-knowledge-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .kv-knowledge-hub-search,
  .kv-knowledge-search {
    flex-wrap: wrap;
  }

  .kv-knowledge-hub-search button,
  .kv-knowledge-search button,
  .kv-hub-cta .kv-btn,
  .kv-kc-empty-actions .kv-btn {
    width: 100%;
    justify-content: center;
  }

  .kv-hub-cta {
    padding: 28px 22px;
    border-radius: 22px;
  }

  .kv-kc-section {
    padding: 40px 0;
  }
}

@media (max-width: 540px) {
  .kv-knowledge-hub-hero .kv-container,
  .kv-kc-section .kv-container {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .kv-knowledge-hub-hero h1,
  .kv-knowledge-hub-lead,
  .kv-knowledge-hub-search,
  .kv-kc-chips--hero {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kv-knowledge-card,
  .kv-knowledge-card-media img,
  .kv-kc-chip {
    transition: none;
  }

  .kv-knowledge-card:hover {
    transform: none;
  }
}

/* ---- Hub videos (KVWEB-09D) ---- */
.kv-hub-video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.kv-hub-video-card {
  display: flex;
  flex-direction: column;
  border-radius: 20px;
  border: 1px solid var(--kc-border);
  background: #FFFFFF;
  box-shadow: var(--kc-shadow-sm);
  overflow: hidden;
}

.kv-hub-video-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 20px 20px;
  flex: 1;
}

.kv-hub-video-body h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--kc-navy);
}

.kv-hub-video-body p {
  margin: 0;
  color: var(--kc-text-secondary);
  font-size: 0.95rem;
  line-height: 1.55;
  flex: 1;
}

.kv-hub-video-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  font-size: 0.82rem;
  color: var(--kc-muted);
  font-weight: 500;
}

.kv-hub-video-body .kv-knowledge-card-link {
  align-self: flex-start;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  font: inherit;
}

.kv-hub-section-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--kc-blue);
  font-weight: 650;
  text-decoration: none;
}

.kv-hub-section-link:hover,
.kv-hub-section-link:focus-visible {
  color: var(--kc-purple);
  outline: none;
}

/* ---- YouTube lite ---- */
.kv-yt-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0b1220;
  overflow: hidden;
}

.kv-yt-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.kv-yt-lite {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  cursor: pointer;
  background: #0b1220;
}

.kv-yt-lite img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.kv-yt-play {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--kc-gradient);
  color: #fff;
  font-size: 1.6rem;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.35);
}

.kv-yt-lite:focus-visible {
  outline: 3px solid var(--kc-cyan);
  outline-offset: 2px;
}

@media (max-width: 1024px) {
  .kv-hub-video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .kv-hub-video-grid {
    grid-template-columns: 1fr;
  }
}