/* buytokens.store — brand layer on Bootstrap 5 (data-bs-theme="dark") */
:root {
  --bt-accent: #5ec8ff;
  --bt-accent-hover: #8edcff;
  --bt-gold: #d4b56a;
  --bt-prose: 42rem;
  /* One content column for prose + card grids (all inner pages + home sections) */
  --bt-content-max: 52rem;
}

html {
  scroll-behavior: smooth;
}

html[lang="zh-CN"] body {
  font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.75rem;
  z-index: 1080;
  padding: 0.5rem 1rem;
  background: var(--bt-accent);
  color: #041018;
  font-weight: 600;
  border-radius: 0.375rem;
}

.skip-link:focus {
  left: 0.75rem;
  outline: 2px solid var(--bt-accent-hover);
  outline-offset: 2px;
}

.navbar {
  backdrop-filter: saturate(140%) blur(12px);
}

.navbar-brand {
  letter-spacing: -0.02em;
}

.navbar-brand .bt-dot {
  color: var(--bt-accent);
}

.nav-link {
  font-weight: 500;
  letter-spacing: 0.01em;
}

.nav-link.active {
  color: var(--bt-accent) !important;
}

.btn-primary {
  --bs-btn-bg: #2a9fd8;
  --bs-btn-border-color: #2a9fd8;
  --bs-btn-hover-bg: #3db8f0;
  --bs-btn-hover-border-color: #5ec8ff;
  --bs-btn-active-bg: #2488b8;
  --bs-btn-active-border-color: #2488b8;
  --bs-btn-color: #061018;
  --bs-btn-hover-color: #061018;
}

.btn-outline-secondary {
  --bs-btn-color: rgba(255, 255, 255, 0.85);
  --bs-btn-border-color: rgba(255, 255, 255, 0.25);
  --bs-btn-hover-bg: rgba(255, 255, 255, 0.08);
  --bs-btn-hover-border-color: rgba(255, 255, 255, 0.35);
}

.lang-switch .btn {
  min-width: 2.75rem;
  font-weight: 700;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
}

.lang-switch .btn.is-active {
  background-color: rgba(94, 200, 255, 0.2);
  border-color: var(--bt-accent);
  color: var(--bt-accent);
}

.hero-slab {
  background: linear-gradient(165deg, rgba(94, 200, 255, 0.08) 0%, transparent 45%, rgba(212, 181, 106, 0.05) 100%);
  border-bottom: 1px solid var(--bs-border-color);
}

.hero-kicker {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bt-accent);
}

.measure {
  max-width: var(--bt-prose);
}

.measure-wide {
  max-width: var(--bt-content-max);
}

/* Section titles inside main — align with article h2 scale */
main .section-title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
}

.text-prose {
  color: rgba(255, 255, 255, 0.78) !important;
}

.card.bt-card {
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.card.bt-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.35);
  border-color: rgba(94, 200, 255, 0.35) !important;
}

.callout-gold {
  border: 1px solid rgba(212, 181, 106, 0.45);
  background: linear-gradient(135deg, rgba(212, 181, 106, 0.1), transparent);
  border-radius: var(--bs-border-radius-lg);
}

.filter-pills .btn {
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.filter-pills .btn.is-on {
  background-color: rgba(94, 200, 255, 0.18);
  border-color: var(--bt-accent);
  color: var(--bt-accent);
}

.tool-card[data-hidden="true"] {
  display: none !important;
}

.site-footer {
  border-top: 1px solid var(--bs-border-color);
  margin-top: auto;
}

@media (min-width: 1200px) {
  .navbar .nav-link {
    padding-left: 0.65rem;
    padding-right: 0.65rem;
  }
}