/* =========================================================
   KNOWLEDGE VAULT
   Scoped styles only. No generic selectors.
========================================================= */

.kv-hero {
  margin: 20px auto 0;
  width: calc(100% - 32px);
  max-width: 1320px;
  border-radius: 26px;
  background: linear-gradient(135deg, #172554 0%, #1e3a8a 56%, #0f766e 100%);
  color: #ffffff;
  overflow: hidden;
}

.kv-hero-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 72px 28px 64px;
  text-align: center;
}

.kv-eyebrow,
.kv-section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .15em;
  color: #e8b254;
}

.kv-hero h1 {
  margin: 16px auto 18px;
  max-width: 820px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  line-height: 1.08;
  font-weight: 500;
}

.kv-hero p {
  max-width: 760px;
  margin: 0 auto;
  color: #dbeafe;
  font-size: 18px;
  line-height: 1.75;
}

.kv-search-box {
  max-width: 720px;
  margin: 34px auto 0;
  text-align: left;
}

.kv-search-box label {
  display: block;
  margin-bottom: 8px;
  color: #f8fafc;
  font-size: 13px;
  font-weight: 700;
}

.kv-search-box input {
  width: 100%;
  min-height: 54px;
  padding: 14px 18px;
  box-sizing: border-box;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 14px;
  background: rgba(255,255,255,.98);
  color: #172554;
  font-size: 16px;
  outline: none;
}

.kv-search-box input:focus {
  border-color: #e8b254;
  box-shadow: 0 0 0 4px rgba(232,178,84,.18);
}

.kv-content {
  max-width: 1240px;
  margin: 0 auto;
  padding: 58px 18px 70px;
}

.kv-heading {
  max-width: 760px;
  margin: 0 auto 30px;
  text-align: center;
}

.kv-heading h2,
.kv-note h2 {
  margin: 10px 0 10px;
  color: #17365d;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 600;
}

.kv-heading p,
.kv-note p {
  margin: 0;
  color: #4b5563;
  font-size: 16px;
  line-height: 1.75;
}

.kv-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.kv-card {
  display: flex;
  flex-direction: column;
  min-height: 300px;
  padding: 26px;
  border: 1px solid #e6eaf0;
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 10px 28px rgba(15,23,42,.06);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.kv-card:hover {
  transform: translateY(-5px);
  border-color: #cbd5e1;
  box-shadow: 0 18px 38px rgba(15,23,42,.10);
}

.kv-card[hidden] {
  display: none;
}

.kv-card-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 16px;
  background: #f1f5f9;
  font-size: 30px;
}

.kv-card-tag {
  display: inline-block;
  margin-bottom: 8px;
  color: #2563eb;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.kv-card h3 {
  margin: 0 0 10px;
  color: #17365d;
  font-size: 22px;
  line-height: 1.35;
}

.kv-card p {
  margin: 0 0 20px;
  color: #4b5563;
  font-size: 15px;
  line-height: 1.75;
}

.kv-card a {
  margin-top: auto;
  color: #0d6efd;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.kv-card a:hover {
  text-decoration: underline;
}

.kv-empty {
  margin: 28px auto 0;
  padding: 24px;
  border: 1px dashed #cbd5e1;
  border-radius: 14px;
  text-align: center;
  color: #4b5563;
}

.kv-empty[hidden] {
  display: none;
}

.kv-empty strong {
  display: block;
  margin-bottom: 6px;
  color: #17365d;
}

.kv-note {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 28px;
  margin-top: 58px;
  padding: 34px;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  background: #f8fafc;
}

.kv-note-points {
  display: grid;
  gap: 14px;
}

.kv-note-points p {
  margin: 0;
  padding: 16px 18px;
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid #e7edf5;
  line-height: 1.6;
}

.kv-note-points strong {
  color: #17365d;
}

@media (max-width: 900px) {
  .kv-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kv-note {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .kv-hero {
    width: calc(100% - 20px);
    border-radius: 20px;
  }

  .kv-hero-inner {
    padding: 48px 20px 46px;
  }

  .kv-hero h1 {
    font-size: 2.3rem;
  }

  .kv-hero p {
    font-size: 16px;
  }

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

  .kv-content {
    padding: 44px 12px 56px;
  }

  .kv-card {
    min-height: auto;
  }

  .kv-note {
    padding: 24px 20px;
  }
}


/* =========================================================
   KNOWLEDGE VAULT ARTICLE PAGES
   Scoped to .kva-* to prevent collisions with site CSS.
========================================================= */

.kva-page {
  max-width: 100%;
  padding: 0 14px 70px;
}

.kva-article {
  max-width: 1080px;
  margin: 0 auto;
}

.kva-article .kv-hero {
  width: 100%;
  max-width: none;
  margin-top: 20px;
}

.kva-article .kv-hero-inner {
  max-width: 900px;
}

.kva-section {
  margin: 42px 0;
}

.kva-section h2 {
  margin: 0 0 16px;
  color: #17365d;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  line-height: 1.25;
}

.kva-section h3 {
  margin: 26px 0 12px;
  color: #17365d;
  font-size: 1.3rem;
}

.kva-section p,
.kva-section li {
  color: #374151;
  font-size: 16px;
  line-height: 1.8;
}

.kva-section ul {
  padding-left: 24px;
}

.kva-section li {
  margin: 8px 0;
}

.kva-lead,
.kva-example,
.kva-important {
  margin: 20px 0;
  padding: 18px 20px;
  border-left: 4px solid #2563eb;
  border-radius: 10px;
  background: #f8fafc;
  color: #334155;
  line-height: 1.75;
}

.kva-example {
  border-left-color: #0f766e;
  background: #f0fdfa;
}

.kva-important {
  border-left-color: #d97706;
  background: #fffbeb;
}

.kva-formula {
  margin: 22px 0;
  padding: 18px;
  border: 1px solid #dbe4ee;
  border-radius: 12px;
  background: #f8fafc;
  color: #17365d;
  text-align: center;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 700;
}

.kva-formula-small {
  font-size: 1.15rem;
  text-align: left;
}

.kva-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 22px 0;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #ffffff;
}

.kva-table-wrap table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.kva-table-wrap th,
.kva-table-wrap td {
  padding: 13px 15px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
  vertical-align: top;
  color: #374151;
  line-height: 1.6;
}

.kva-table-wrap th {
  background: #f1f5f9;
  color: #17365d;
  font-weight: 800;
}

.kva-table-wrap tr:last-child td {
  border-bottom: 0;
}

.kva-problem {
  margin: 28px 0;
  padding: 24px;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(15,23,42,.05);
}

.kva-problem h3 {
  margin-top: 0;
}

.kva-working {
  margin: 16px 0;
  padding: 16px 18px;
  border-radius: 10px;
  background: #f8fafc;
  color: #1f2937;
  font-family: "Courier New", monospace;
  line-height: 1.9;
  overflow-x: auto;
}

.kva-checklist {
  margin: 0;
  padding: 22px 28px;
  border-radius: 14px;
  background: #f8fafc;
}

.kva-revision {
  padding: 22px 24px;
  border: 1px solid #dbe4ee;
  border-radius: 14px;
  background: #f8fafc;
}

.kva-revision p {
  margin: 9px 0;
}

.kva-faq details {
  margin: 12px 0;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #ffffff;
}

.kva-faq summary {
  padding: 17px 18px;
  cursor: pointer;
  color: #17365d;
  font-weight: 800;
  line-height: 1.5;
}

.kva-faq details p {
  margin: 0;
  padding: 0 18px 18px;
}

.kva-doubt {
  margin: 54px 0 30px;
  padding: 36px 28px;
  border-radius: 20px;
  background: linear-gradient(135deg, #172554, #1e3a8a);
  color: #ffffff;
  text-align: center;
}

.kva-doubt h2 {
  margin: 10px 0;
  color: #ffffff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.9rem, 4vw, 2.7rem);
}

.kva-doubt p {
  max-width: 700px;
  margin: 0 auto 22px;
  color: #dbeafe;
  line-height: 1.75;
}

.kva-doubt a {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 10px;
  background: #ffffff;
  color: #17365d;
  font-weight: 800;
  text-decoration: none;
}

.kva-doubt a:hover {
  text-decoration: underline;
}

.kva-bottom-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
}

.kva-bottom-nav a {
  color: #0d6efd;
  font-weight: 800;
  text-decoration: none;
}

.kva-bottom-nav a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .kva-page {
    padding: 0 10px 50px;
  }

  .kva-section {
    margin: 34px 0;
  }

  .kva-section p,
  .kva-section li {
    font-size: 15px;
  }

  .kva-problem {
    padding: 20px 17px;
  }

  .kva-doubt {
    padding: 30px 20px;
  }

  .kva-bottom-nav {
    flex-direction: column;
  }
}