:root {
  --bg: #06060a;
  --surface: #0f1016;
  --surface-2: #151720;
  --line: rgba(245, 243, 238, 0.12);
  --line-strong: rgba(245, 243, 238, 0.2);
  --ink: #f5f3ee;
  --ink-2: rgba(245, 243, 238, 0.76);
  --muted: rgba(245, 243, 238, 0.52);
  --gold: #c9a84c;
  --gold-2: #e2bf5e;
  --green: #6fcf97;
  --sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { background: var(--bg); color: var(--ink); }
body {
  margin: 0;
  background: radial-gradient(circle at top, rgba(201, 168, 76, 0.12), transparent 34rem), var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-2); }

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
  background: rgba(6, 6, 10, 0.86);
  backdrop-filter: blur(18px);
}
.brand {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0.22em;
  font-size: 14px;
}
.brand span { color: var(--gold); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.nav-links a {
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 600;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}
.article-shell {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}
.kb-hero,
.article-hero {
  padding: 78px 0 42px;
}
.kb-hero.small { padding-bottom: 20px; }
.article-hero { padding-bottom: 22px; }
.kicker,
.eyebrow,
.article-meta,
.count {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1 {
  max-width: 920px;
  margin-bottom: 18px;
  font-size: clamp(34px, 7vw, 70px);
  line-height: 0.96;
  letter-spacing: 0;
}
.article-hero h1 {
  max-width: 760px;
  font-size: clamp(34px, 6vw, 58px);
}
h2 {
  margin-bottom: 12px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.08;
}
.lede {
  max-width: 760px;
  margin-bottom: 26px;
  color: var(--ink-2);
  font-size: 18px;
}

.search {
  display: flex;
  width: min(720px, 100%);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface);
}
.search input {
  min-width: 0;
  flex: 1;
  border: 0;
  outline: 0;
  padding: 17px 18px;
  background: transparent;
  color: var(--ink);
  font: 500 15px var(--sans);
}
.search input::placeholder { color: var(--muted); }
.search button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid var(--gold);
  border-radius: 8px;
  padding: 0 18px;
  background: var(--gold);
  color: #0a0a10;
  font: 800 13px var(--sans);
  cursor: pointer;
}
.search button { border-radius: 0; }
.button.secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.button.ghost {
  background: rgba(245, 243, 238, 0.04);
  color: var(--ink);
  border-color: var(--line);
}

main section {
  padding: 30px 0;
  border-top: 1px solid var(--line);
}
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}
.count { color: var(--muted); }

.support-strip {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(201, 168, 76, 0.12), rgba(111, 207, 151, 0.08));
}
.support-strip h2 {
  margin-bottom: 8px;
  font-size: 24px;
}
.support-strip p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--ink-2);
}
.strip-actions,
.support-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.support-actions {
  align-items: center;
  justify-content: flex-end;
}
.support-strip .support-actions {
  max-width: 430px;
}

.category-grid,
.article-grid {
  display: grid;
  gap: 14px;
}
.category-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.article-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.category-card,
.article-card {
  display: grid;
  gap: 10px;
  min-height: 168px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(15, 16, 22, 0.86);
  color: var(--ink);
}
.category-card:hover,
.article-card:hover {
  border-color: var(--gold);
  color: var(--ink);
}
.category-card .num {
  color: var(--gold);
  font: 700 12px var(--mono);
}
.category-card strong,
.article-card strong {
  font-size: 18px;
  line-height: 1.2;
}
.category-card small,
.article-card small {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.48;
}
.category-card em {
  align-self: end;
  color: var(--muted);
  font: normal 11px var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.all-articles { margin-bottom: 20px; }
.empty {
  padding: 18px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--ink-2);
}

.article-body {
  color: var(--ink-2);
  font-size: 16px;
}
.article-body section {
  padding: 28px 0;
}
.article-body h2 {
  color: var(--ink);
  font-size: 27px;
}
.article-body p,
.article-body li {
  color: var(--ink-2);
}
.article-body ul {
  margin: 14px 0 0;
  padding-left: 20px;
}
.article-body li + li { margin-top: 8px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  background: var(--surface);
}
.faq details + details { margin-top: 10px; }
.faq summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 700;
}
.faq p { margin: 10px 0 0; }
.callout {
  margin-top: 18px;
  margin-bottom: 28px;
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface-2);
}
.callout h2 {
  font-size: 24px;
}
.callout p {
  margin-bottom: 0;
  color: var(--ink-2);
}
.callout .support-actions {
  justify-content: flex-start;
  margin-top: 18px;
}

.kb-toast {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 2147483647;
  max-width: min(420px, calc(100vw - 40px));
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--ink);
  box-shadow: 0 18px 48px -12px rgba(0, 0, 0, 0.56);
  font-size: 13px;
}

.kb-chat-panel {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 2147483646;
  display: flex;
  flex-direction: column;
  width: min(390px, calc(100vw - 36px));
  max-height: min(680px, calc(100vh - 36px));
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #ffffff;
  color: #1f2937;
  box-shadow: 0 24px 60px -14px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}
.kb-chat-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: #0a0a10;
  color: #ffffff;
}
.kb-chat-avatar {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gold);
  color: #0a0a10;
  font-weight: 800;
}
.kb-chat-title {
  flex: 1;
  line-height: 1.28;
}
.kb-chat-title small {
  display: block;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}
.kb-chat-close {
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #ffffff;
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  padding: 4px 8px;
}
.kb-chat-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 10px;
  min-height: 180px;
  overflow-y: auto;
  padding: 16px;
  background: #f8f9fb;
}
.kb-chat-msg {
  max-width: 84%;
  padding: 10px 13px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.42;
}
.kb-chat-msg.agent {
  align-self: flex-start;
  border-bottom-left-radius: 4px;
  background: #ffffff;
  color: #1f2937;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}
.kb-chat-msg.user {
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  background: var(--gold);
  color: #0a0a10;
}
.kb-chat-actions {
  display: flex;
  gap: 8px;
  padding: 10px 12px 0;
  background: #f8f9fb;
}
.kb-chat-actions a,
.kb-chat-actions button {
  flex: 1;
  min-height: 36px;
  border: 1px solid rgba(201, 168, 76, 0.5);
  border-radius: 999px;
  background: #ffffff;
  color: #0a0a10;
  cursor: pointer;
  font: 700 12px var(--sans);
}
.kb-chat-form {
  display: grid;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid #eef0f4;
  background: #ffffff;
}
.kb-chat-form input,
.kb-chat-form textarea {
  width: 100%;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #ffffff;
  color: #1f2937;
  font: 500 14px var(--sans);
  padding: 10px 12px;
  resize: vertical;
}
.kb-chat-form input:focus,
.kb-chat-form textarea:focus {
  outline: 0;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.18);
}
.kb-chat-send {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: #0a0a10;
  color: #ffffff;
  cursor: pointer;
  font: 800 14px var(--sans);
}
.kb-chat-note {
  padding: 8px 12px;
  border-top: 1px solid #eef0f4;
  background: #ffffff;
  color: #8b92a1;
  text-align: center;
  font-size: 11px;
}

footer {
  margin-top: 52px;
  border-top: 1px solid var(--line);
  background: #050508;
}
.footer-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 0;
  color: var(--muted);
}
.footer-inner strong {
  color: var(--gold);
  letter-spacing: 0.18em;
}
.footer-inner p {
  max-width: 560px;
  margin: 8px 0 0;
  font-size: 13px;
}
.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-content: flex-start;
  justify-content: flex-end;
}
.footer-links a {
  color: var(--ink-2);
  font-size: 13px;
}

@media (max-width: 860px) {
  .category-grid,
  .article-grid,
  .support-strip {
    grid-template-columns: 1fr;
  }
  .support-strip { align-items: start; }
  .support-actions,
  .support-strip .support-actions {
    justify-content: flex-start;
    max-width: none;
  }
}

@media (max-width: 620px) {
  .top { align-items: flex-start; flex-direction: column; }
  .nav-links { gap: 12px; }
  .kb-hero,
  .article-hero { padding-top: 46px; }
  .search { display: grid; }
  .search button { min-height: 48px; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .category-card,
  .article-card { min-height: auto; }
  .strip-actions,
  .support-actions,
  .footer-inner { flex-direction: column; }
  .support-actions .button,
  .support-actions button,
  .support-actions a {
    width: 100%;
  }
  .footer-links { justify-content: flex-start; }
  .kb-chat-panel {
    right: 12px;
    bottom: 12px;
    width: calc(100vw - 24px);
  }
}