:root {
  --qa-ink: #0f2745;
  --qa-muted: #52657a;
  --qa-line: #d8e3ed;
  --qa-soft: #f4f8fb;
  --qa-accent: #0b7a75;
  --qa-accent-dark: #075d59;
  --qa-warm: #f2a33a;
}

.qa-hero {
  background:
    radial-gradient(circle at 85% 15%, rgba(45, 171, 164, .24), transparent 34%),
    linear-gradient(135deg, #0f2745 0%, #123c62 58%, #0b615f 100%);
  color: #fff;
  padding: clamp(58px, 8vw, 96px) 0;
}

.qa-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: 42px;
  align-items: center;
}

.qa-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 16px;
  color: #bff3ee;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.qa-eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--qa-warm);
}

.qa-hero h1 {
  max-width: 850px;
  margin: 0;
  color: #fff;
  font-size: clamp(38px, 5.4vw, 68px);
  line-height: 1.05;
  letter-spacing: -.035em;
}

.qa-hero-copy {
  max-width: 760px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, .82);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.7;
}

.qa-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.qa-stat {
  min-height: 118px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 16px;
  background: rgba(255, 255, 255, .08);
  backdrop-filter: blur(7px);
}

.qa-stat strong {
  display: block;
  color: #fff;
  font-size: 30px;
  line-height: 1;
}

.qa-stat span {
  display: block;
  margin-top: 10px;
  color: rgba(255, 255, 255, .7);
  font-size: 13px;
  line-height: 1.45;
}

.qa-section {
  padding: clamp(58px, 7vw, 92px) 0;
}

.qa-section.qa-soft {
  background: var(--qa-soft);
}

.qa-section-head {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: end;
  margin-bottom: 30px;
}

.qa-section-head h2 {
  max-width: 720px;
  margin: 0;
  color: var(--qa-ink);
  font-size: clamp(28px, 3.5vw, 42px);
  line-height: 1.15;
}

.qa-section-head p {
  max-width: 620px;
  margin: 10px 0 0;
  color: var(--qa-muted);
  line-height: 1.7;
}

.qa-search-panel {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) auto;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--qa-line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(15, 39, 69, .08);
}

.qa-search {
  width: 100%;
  min-height: 50px;
  padding: 0 18px;
  border: 1px solid var(--qa-line);
  border-radius: 11px;
  color: var(--qa-ink);
  font: inherit;
  outline: none;
}

.qa-search:focus {
  border-color: var(--qa-accent);
  box-shadow: 0 0 0 4px rgba(11, 122, 117, .1);
}

.qa-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 20px 0 28px;
}

.qa-filter {
  padding: 9px 14px;
  border: 1px solid var(--qa-line);
  border-radius: 999px;
  background: #fff;
  color: var(--qa-muted);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.qa-filter:hover,
.qa-filter[aria-pressed="true"] {
  border-color: var(--qa-accent);
  background: var(--qa-accent);
  color: #fff;
}

.qa-results-meta {
  margin: -10px 0 24px;
  color: var(--qa-muted);
  font-size: 14px;
}

.qa-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.qa-card {
  position: relative;
  display: flex;
  min-height: 220px;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--qa-line);
  border-radius: 18px;
  background: #fff;
  color: inherit;
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.qa-card:hover {
  transform: translateY(-4px);
  border-color: rgba(11, 122, 117, .45);
  box-shadow: 0 18px 40px rgba(15, 39, 69, .1);
}

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

.qa-card-top {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
}

.qa-number {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: #e8f4f3;
  color: var(--qa-accent-dark);
  font-size: 13px;
  font-weight: 800;
}

.qa-tag {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: #edf3f8;
  color: #36536c;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.qa-card h3 {
  margin: 22px 0 12px;
  color: var(--qa-ink);
  font-size: 21px;
  line-height: 1.35;
}

.qa-card p {
  margin: 0;
  color: var(--qa-muted);
  font-size: 14px;
  line-height: 1.65;
}

.qa-card-link {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-top: auto;
  padding-top: 22px;
  color: var(--qa-accent-dark);
  font-size: 14px;
  font-weight: 800;
}

.qa-card-link::after {
  content: "→";
  transition: transform .2s ease;
}

.qa-card:hover .qa-card-link::after {
  transform: translateX(4px);
}

.qa-empty {
  padding: 34px;
  border: 1px dashed var(--qa-line);
  border-radius: 16px;
  color: var(--qa-muted);
  text-align: center;
}

.qa-topic-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.qa-topic-card {
  padding: 20px;
  border: 1px solid var(--qa-line);
  border-radius: 15px;
  background: #fff;
}

.qa-topic-card strong {
  display: block;
  color: var(--qa-ink);
  font-size: 16px;
  line-height: 1.45;
}

.qa-topic-card span,
.qa-topic-card a {
  display: block;
  margin-top: 10px;
  color: var(--qa-muted);
  font-size: 13px;
  line-height: 1.5;
}

.qa-topic-card a {
  color: var(--qa-accent-dark);
  font-weight: 800;
}

.qa-method-note {
  margin-top: 24px;
  padding: 20px 22px;
  border-left: 4px solid var(--qa-warm);
  border-radius: 0 12px 12px 0;
  background: #fff8ed;
  color: #5d4b32;
  line-height: 1.7;
}

.qa-page-hero {
  padding: clamp(50px, 7vw, 82px) 0;
  background:
    radial-gradient(circle at 78% -18%, rgba(11, 122, 117, .10), transparent 38%),
    linear-gradient(135deg, #f7f9fb, #eef3f7);
  border-bottom: 1px solid var(--qa-line);
  color: var(--qa-ink);
  text-align: center;
}

.qa-page-hero h1 {
  max-width: 940px;
  margin: 14px auto 20px;
  color: var(--qa-ink);
  font-size: clamp(32px, 4.5vw, 54px);
  line-height: 1.12;
  letter-spacing: -.03em;
}

.qa-page-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.qa-page-meta span {
  padding: 7px 11px;
  border: 1px solid var(--qa-line);
  border-radius: 999px;
  background: #fff;
  color: var(--qa-muted);
  font-size: 12px;
  font-weight: 700;
}

.qa-page-hero .qa-eyebrow {
  color: var(--qa-accent-dark);
}

.qa-single-section {
  background: #fff;
}

.qa-single-shell {
  max-width: 900px;
  margin: 0 auto;
}

.qa-answer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  align-items: start;
}

.qa-direct-answer {
  padding: 0 0 0 clamp(20px, 3vw, 30px);
  border-left: 4px solid var(--qa-accent);
}

.qa-direct-answer h2 {
  margin: 0 0 14px;
  color: var(--qa-ink);
  font-size: 25px;
}

.qa-direct-answer p {
  margin: 0;
  color: var(--qa-ink);
  font-size: 18px;
  line-height: 1.8;
  font-weight: 650;
}

.qa-answer-body {
  margin-top: 38px;
}

.qa-answer-body h2 {
  margin: 34px 0 12px;
  color: var(--qa-ink);
  font-size: 26px;
}

.qa-answer-body h2:first-child {
  margin-top: 0;
}

.qa-answer-body p,
.qa-answer-body li {
  color: var(--qa-muted);
  font-size: 16px;
  line-height: 1.78;
}

.qa-answer-body a {
  color: var(--qa-accent-dark);
  font-weight: 700;
  text-underline-offset: 3px;
}

.qa-answer-body ul,
.qa-answer-body ol {
  margin: 12px 0 0;
  padding-left: 22px;
}

.qa-answer-body li + li {
  margin-top: 9px;
}

.qa-inline-route {
  margin: 26px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--qa-line);
  border-radius: 12px;
  background: var(--qa-soft);
}

.qa-topic-context {
  margin: 24px 0 0;
}

.qa-context-link {
  text-decoration-thickness: 1px;
}

.qa-related-panel {
  margin-top: 44px;
  padding-top: 8px;
  border-top: 1px solid var(--qa-line);
}

.qa-related-panel ul {
  padding-left: 20px;
}

.qa-all-questions {
  display: inline-block;
  margin-top: 16px;
}

.qa-project-note {
  margin-top: 42px;
  padding: 26px 28px;
  border-radius: 14px;
  background: var(--qa-ink);
  color: #fff;
}

.qa-project-note h2 {
  margin: 0 0 10px;
  color: #fff;
  font-size: 24px;
}

.qa-project-note p {
  margin: 0 0 14px;
  color: rgba(255, 255, 255, .78);
}

.qa-project-note a {
  color: #fff;
}

.qa-side-card {
  position: sticky;
  top: 92px;
  padding: 22px;
  border: 1px solid var(--qa-line);
  border-radius: 16px;
  background: #fff;
}

.qa-side-card h2 {
  margin: 0 0 12px;
  color: var(--qa-ink);
  font-size: 18px;
}

.qa-side-card a {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--qa-line);
  color: var(--qa-accent-dark);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.45;
}

.qa-side-card a:last-child {
  border-bottom: 0;
}

.qa-source-list {
  padding: 0;
  list-style: none;
}

.qa-source-list li {
  margin-top: 10px;
}

.qa-source-list a {
  color: var(--qa-accent-dark);
  font-weight: 700;
}

.qa-caution {
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid #f1d6aa;
  border-radius: 13px;
  background: #fff8ed;
  color: #5f4a2c;
  line-height: 1.7;
}

.qa-covered-questions {
  margin: 12px 0 0;
  padding-left: 24px;
}

.qa-covered-questions li + li {
  margin-top: 9px;
}

.qa-covered-questions a {
  color: var(--qa-accent-dark);
  font-weight: 700;
}

.qa-archive-list {
  margin: 0;
  padding-left: 38px;
}

.qa-archive-list li {
  padding: 12px 14px;
  border-bottom: 1px solid var(--qa-line);
  color: var(--qa-ink);
  line-height: 1.55;
}

.qa-archive-list li:nth-child(odd) {
  background: #f8fafc;
}

.qa-source-meta {
  display: block;
  margin-top: 5px;
  color: var(--qa-muted);
  font-size: 12px;
}

.qa-pagination {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 28px;
}

@media (max-width: 1020px) {
  .qa-hero-grid,
  .qa-answer-layout {
    grid-template-columns: 1fr;
  }

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

  .qa-side-card {
    position: static;
  }
}

@media (max-width: 720px) {
  .qa-grid,
  .qa-search-panel,
  .qa-topic-grid {
    grid-template-columns: 1fr;
  }

  .qa-section-head {
    display: block;
  }

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

  .qa-card {
    min-height: 0;
  }
}

@media (max-width: 430px) {
  .qa-hero-stats {
    grid-template-columns: 1fr;
  }

  .qa-filter-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .qa-filter {
    flex: 0 0 auto;
  }
}