/* ============================================================
   BrainChain · site-pages.css
   Shared page layouts, mobile menu, fixed dark theme, lead states.
============================================================ */

.bc-mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-md);
  color: var(--bc-text-secondary);
}

.bc-mobile-menu-toggle svg {
  width: 15px;
  height: 15px;
}

.bc-mobile-menu {
  display: none;
  position: sticky;
  top: 76px;
  z-index: 70;
  background: color-mix(in srgb, var(--bc-bg-primary) 94%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bc-border-soft);
}

.bc-mobile-menu__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--bc-space-3) var(--bc-space-4);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--bc-space-2);
}

.bc-mobile-menu a {
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-md);
  padding: var(--bc-space-3);
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-11);
  letter-spacing: var(--bc-ls-wide);
  text-transform: uppercase;
  color: var(--bc-text-secondary);
  background: var(--bc-bg-secondary);
}

.bc-mobile-menu a:hover {
  border-color: var(--bc-accent);
  color: var(--bc-accent-light);
}

.bc-i18n-floating {
  position: fixed;
  right: var(--bc-space-4);
  bottom: var(--bc-space-16);
  z-index: var(--bc-z-tooltip);
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-md);
  background: rgba(18, 18, 18, 0.92);
  box-shadow: var(--bc-shadow-lg);
}

.bc-i18n-floating button,
.bc-lang-toggle__opt {
  min-width: 26px;
  height: 22px;
  padding: 0 6px;
  border-radius: var(--bc-radius-sm);
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-10);
  font-weight: var(--bc-fw-semibold);
  letter-spacing: var(--bc-ls-wide);
  color: var(--bc-text-tertiary);
}

.bc-i18n-floating button[aria-current="true"],
.bc-lang-toggle__opt[aria-current="true"] {
  background: var(--bc-bg-elevated);
  color: var(--bc-text-primary);
}

html[data-mobile-menu="open"] .bc-mobile-menu {
  display: block;
}

.bc-page-hero {
  padding: var(--bc-space-16) 0 var(--bc-space-12);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.05), rgba(0,0,0,0) 55%),
    radial-gradient(70% 70% at 20% 0%, color-mix(in srgb, var(--bc-accent) 28%, transparent), transparent 65%),
    var(--bc-bg-primary);
  border-bottom: 1px solid var(--bc-border-soft);
}

.bc-page-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: var(--bc-space-8);
  align-items: end;
}

.bc-page-hero h1 {
  margin-top: var(--bc-space-3);
  max-width: 760px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.025em;
}

.bc-page-hero p {
  margin-top: var(--bc-space-4);
  max-width: 68ch;
  font-size: var(--bc-fs-16);
  line-height: var(--bc-lh-relaxed);
}

.bc-page-hero__panel {
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-xl);
  background: var(--bc-bg-secondary);
  padding: var(--bc-space-5);
}

.bc-page-hero__panel .metric {
  display: flex;
  justify-content: space-between;
  gap: var(--bc-space-4);
  padding: var(--bc-space-3) 0;
  border-bottom: 1px solid var(--bc-border-soft);
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-11);
}

.bc-page-hero__panel .metric:last-child {
  border-bottom: 0;
}

.bc-page-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--bc-space-4);
}

.bc-page-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.bc-page-card {
  background: var(--bc-bg-secondary);
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-xl);
  padding: var(--bc-space-5);
  display: flex;
  flex-direction: column;
  gap: var(--bc-space-3);
}

.bc-page-card h3 {
  font-size: var(--bc-fs-18);
}

.bc-page-card p,
.bc-page-card li {
  color: var(--bc-text-secondary);
  line-height: var(--bc-lh-relaxed);
}

.bc-page-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--bc-space-2);
}

.bc-page-card li {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: var(--bc-space-2);
}

.bc-page-card li::before {
  content: ">";
  color: var(--bc-accent-light);
  font-family: var(--bc-font-mono);
}

.bc-login-page {
  min-height: calc(100vh - 28px - 56px - 53px);
  display: grid;
  align-items: center;
  padding: var(--bc-space-16) var(--bc-space-6);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.045), rgba(0,0,0,0) 58%),
    radial-gradient(60% 72% at 18% 8%, color-mix(in srgb, var(--bc-accent) 32%, transparent), transparent 66%),
    radial-gradient(48% 52% at 90% 18%, rgba(59,130,246,0.18), transparent 62%),
    var(--bc-bg-primary);
  border-bottom: 1px solid var(--bc-border-soft);
}

.bc-login-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 430px);
  gap: var(--bc-space-8);
  align-items: center;
}

.bc-login-copy {
  display: flex;
  flex-direction: column;
  gap: var(--bc-space-4);
}

.bc-login-copy h1 {
  max-width: 760px;
  font-size: clamp(36px, 5.6vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.025em;
}

.bc-login-copy p {
  max-width: 64ch;
  font-size: var(--bc-fs-16);
  line-height: var(--bc-lh-relaxed);
  color: #c4c4cf;
}

.bc-login-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--bc-space-3);
  margin-top: var(--bc-space-2);
}

.bc-login-meta span {
  display: inline-flex;
  gap: var(--bc-space-1);
  align-items: center;
  height: 30px;
  padding: 0 var(--bc-space-3);
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-md);
  background: rgba(255,255,255,0.035);
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-10);
  color: var(--bc-text-tertiary);
  text-transform: uppercase;
}

.bc-login-meta strong {
  color: var(--bc-text-primary);
}

.bc-login-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--bc-space-5);
  padding: var(--bc-space-6);
  border: 1px solid color-mix(in srgb, var(--bc-border) 74%, var(--bc-accent) 26%);
  border-radius: var(--bc-radius-xl);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.045), rgba(255,255,255,0.012)),
    var(--bc-bg-secondary);
  box-shadow: var(--bc-shadow-xl), inset 0 1px 0 rgba(255,255,255,0.04);
}

.bc-login-card__brand {
  display: flex;
  align-items: center;
  gap: var(--bc-space-3);
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-12);
  font-weight: var(--bc-fw-bold);
  letter-spacing: var(--bc-ls-wide);
  text-transform: uppercase;
  color: var(--bc-text-primary);
}

.bc-login-card__brand .bc-brand__mark {
  width: 34px;
  height: 34px;
}

.bc-login-card__brand span span {
  color: var(--bc-accent-light);
}

.bc-login-card h2 {
  margin-bottom: var(--bc-space-2);
  font-size: var(--bc-fs-24);
}

.bc-login-card p {
  color: var(--bc-text-secondary);
  line-height: var(--bc-lh-relaxed);
}

.bc-google-login {
  width: 100%;
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--bc-space-3);
  padding: 0 var(--bc-space-4);
  border: 1px solid rgba(255,255,255,0.82);
  border-radius: var(--bc-radius-md);
  background: #fff;
  color: #1f1f1f;
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-13);
  font-weight: var(--bc-fw-semibold);
  letter-spacing: var(--bc-ls-wide);
  text-transform: uppercase;
  transition: transform 160ms var(--bc-ease-out), box-shadow 160ms, background 160ms;
}

.bc-google-login:hover {
  background: #f4f4f5;
  box-shadow: 0 12px 28px rgba(0,0,0,0.28);
  transform: translateY(-1px);
}

.bc-google-login img {
  width: 20px;
  height: 20px;
}

.bc-login-card__note {
  padding-top: var(--bc-space-4);
  border-top: 1px dashed var(--bc-border-soft);
  font-size: var(--bc-fs-12);
  color: var(--bc-text-tertiary) !important;
}

@media (max-width: 900px) {
  .bc-login-page {
    padding: var(--bc-space-10) var(--bc-space-4);
  }

  .bc-login-shell {
    grid-template-columns: 1fr;
    gap: var(--bc-space-6);
  }

  .bc-login-copy h1 {
    font-size: clamp(32px, 8vw, 48px);
  }
}

@media (max-width: 480px) {
  .bc-login-page {
    padding: var(--bc-space-8) var(--bc-space-3);
  }

  .bc-login-card {
    padding: var(--bc-space-5);
  }

  .bc-login-meta {
    display: grid;
    grid-template-columns: 1fr;
  }
}

/* Contrast polish for dense home sections. */
.bc-models-col,
.bc-bench-wrap,
.bc-faq,
.bc-plan,
.bc-page-card,
.bc-page-hero__panel {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.01)),
    var(--bc-bg-secondary);
  border-color: color-mix(in srgb, var(--bc-border) 74%, var(--bc-accent) 26%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.035);
}

.bc-models-col__lead,
.bc-models-col__steps,
.bc-rate-table tbody td,
.bc-faq__inner,
.bc-plan__sub,
.bc-plan__features,
.bc-page-card p,
.bc-page-card li {
  color: #c4c4cf;
}

.bc-models-col__list li,
.bc-faq__item,
.bc-rate-table tbody td {
  border-color: rgba(255,255,255,0.075);
}

.bc-rate-table thead th {
  color: #9f9faa;
  background: #202024;
}

.bc-rate-table tbody tr:hover td,
.bc-faq__q:hover {
  background: rgba(124,58,237,0.09);
}

.bc-rate-table .best,
.bc-faq__q,
.bc-plan__features span {
  color: #f2f2f5;
}

.bc-plan {
  transition: transform 180ms var(--bc-ease-out), border-color 180ms, box-shadow 180ms, background 180ms;
}

.bc-plan:hover {
  transform: translateY(-3px);
  border-color: var(--bc-accent-light);
  box-shadow: 0 16px 40px rgba(0,0,0,0.24), 0 0 0 1px rgba(167,139,250,0.16);
}

.bc-plan .bc-plan__btn {
  border-color: rgba(167,139,250,0.35);
  background: rgba(124,58,237,0.08);
}

.bc-plan .bc-plan__btn:hover {
  background: rgba(124,58,237,0.18);
  border-color: var(--bc-accent-light);
  color: white;
}

.bc-plan .bc-plan__btn[disabled],
.bc-plan .bc-plan__btn[aria-disabled="true"] {
  pointer-events: auto;
  opacity: 0.78;
  cursor: not-allowed;
}

.bc-plan .bc-plan__btn[disabled]:hover,
.bc-plan .bc-plan__btn[aria-disabled="true"]:hover {
  background: rgba(255,255,255,0.045);
  border-color: rgba(255,255,255,0.16);
  color: var(--bc-text-secondary);
  transform: none;
}

.bc-doc-list {
  display: grid;
  gap: var(--bc-space-3);
}

.bc-doc-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--bc-space-3);
  align-items: center;
  padding: var(--bc-space-4);
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-lg);
  background: var(--bc-bg-secondary);
}

.bc-doc-list a:hover {
  border-color: var(--bc-accent);
}

.bc-lead-status {
  margin-top: var(--bc-space-2);
  min-height: 16px;
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-10);
  color: var(--bc-text-tertiary);
}

.bc-toast {
  position: fixed;
  right: var(--bc-space-4);
  bottom: var(--bc-space-4);
  z-index: var(--bc-z-tooltip);
  max-width: min(360px, calc(100vw - 32px));
  padding: var(--bc-space-3) var(--bc-space-4);
  border: 1px solid var(--bc-border-soft);
  border-radius: var(--bc-radius-lg);
  background: var(--bc-bg-elevated);
  box-shadow: var(--bc-shadow-xl);
  color: var(--bc-text-primary);
  font-family: var(--bc-font-mono);
  font-size: var(--bc-fs-11);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 180ms, transform 180ms;
}

.bc-toast[data-open="true"] {
  opacity: 1;
  transform: translateY(0);
}

.bc-legal-copy {
  max-width: 860px;
}

.bc-legal-copy h2 {
  margin-top: var(--bc-space-8);
  margin-bottom: var(--bc-space-3);
}

.bc-legal-copy p {
  margin-bottom: var(--bc-space-3);
  color: var(--bc-text-secondary);
  line-height: var(--bc-lh-relaxed);
}

@media (max-width: 1024px) {
  .bc-mobile-menu-toggle { display: inline-flex; }
  .bc-navbar .bc-lang-toggle { display: inline-flex; }
  .bc-page-hero__grid,
  .bc-page-grid,
  .bc-page-grid--2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .bc-mobile-menu { top: 72px; }
  .bc-mobile-menu__inner { grid-template-columns: 1fr; }
  .bc-page-hero { padding: var(--bc-space-10) 0; }
  .bc-page-hero p { font-size: var(--bc-fs-14); }
  .bc-page-card { padding: var(--bc-space-4); }
}