/* Site Header — sticky brand navigation */

.site-header {
  --site-header-height: 76px;
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--site-header-height);
  background: #ffffff;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, backdrop-filter 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border, rgba(15, 118, 110, 0.12));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04);
}

body.flow-active .site-header,
body.result-active .site-header {
  display: none;
}

.site-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 28px;
}

/* Brand logo */
.site-logo {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--color-text-primary, #0f172a);
  padding: 6px 0;
  min-width: 0;
}

.site-logo:hover .site-logo__word,
.site-logo:focus-visible .site-logo__word {
  color: var(--color-primary, #0f766e);
}

.site-logo__mark {
  display: inline-flex;
  align-items: flex-start;
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.site-logo__word {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  transition: color 0.15s ease;
}

.site-logo__reg {
  font-size: 0.55em;
  font-weight: 600;
  line-height: 1;
  margin: 0.15em 0 0 0.08em;
  color: var(--color-text-muted, #64748b);
  letter-spacing: 0;
}

.site-logo__tagline {
  font-size: 0.75rem;
  line-height: 1.3;
  color: var(--color-text-muted, #64748b);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

/* Desktop nav */
.site-nav {
  flex: 1;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary, #0f172a);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.site-nav__item[data-nav-id="challenge"] > .site-nav__link {
  padding-left: 10px;
  padding-right: 10px;
  letter-spacing: -0.03em;
  white-space: nowrap;
}

.site-nav__item[data-nav-id="challenge"] > .site-nav__link .hit-badge {
  flex-shrink: 0;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__item.is-open > .site-nav__link {
  color: var(--color-primary, #0f766e);
  background: var(--color-primary-subtle, rgba(15, 118, 110, 0.06));
}

.site-nav__link--diagnose {
  white-space: nowrap;
  padding-left: 10px;
  padding-right: 10px;
}

.hit-badge {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 5px;
  border-radius: 4px;
  background: #ff4d4f;
  color: #ffffff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  vertical-align: middle;
  transform: translateY(-1px);
}

.hit-badge--new {
  background: #2563eb;
  letter-spacing: 0.03em;
}

.hit-badge--season {
  background: #c2410c;
  letter-spacing: -0.02em;
}

.hit-badge--urgent {
  display: inline-block;
  white-space: nowrap;
  background: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
  color: #ffffff;
  letter-spacing: -0.02em;
  box-shadow: 0 1px 2px rgba(239, 68, 68, 0.28);
}

.site-nav__dropdown-list .hit-badge {
  margin-left: 0;
  flex: 0 0 auto;
}

.site-mobile-nav__group ul a {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.site-mobile-nav__group ul .hit-badge {
  margin-left: 0;
}

/* Desktop nav already uses flex gap — avoid double spacing. */
.site-nav__link .hit-badge {
  margin-left: 0;
}

.site-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding-top: 8px;
  background: transparent;
  border: none;
  box-shadow: none;
}

.site-nav__dropdown-list {
  list-style: none;
  margin: 0;
  padding: 8px;
  background: #ffffff;
  border: 1px solid var(--color-border, rgba(15, 118, 110, 0.12));
  border-radius: 12px;
  box-shadow: var(--shadow-md, 0 8px 24px rgba(15, 23, 42, 0.08));
}

.site-nav__dropdown-list a {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary, #334155);
  text-decoration: none;
  transition: color 0.15s ease, background 0.15s ease;
}

.site-nav__dropdown-list a:hover,
.site-nav__dropdown-list a:focus-visible {
  color: var(--color-primary, #0f766e);
  background: var(--color-primary-subtle, rgba(15, 118, 110, 0.06));
}

.site-nav__dropdown-list a.site-nav__challenge-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.site-nav__challenge-link.is-locked,
.site-mobile-nav__challenge-link.is-locked {
  color: var(--color-text-muted, #94a3b8);
  cursor: not-allowed;
  opacity: 0.72;
}

.site-nav__challenge-rediagnose,
.site-mobile-nav__challenge-rediagnose {
  border-top: 1px solid var(--color-border-subtle, rgba(15, 23, 42, 0.08));
  margin-top: 4px;
  padding-top: 10px;
}

.site-nav__dropdown-list > li.is-gated,
.site-mobile-nav__group ul > li.is-gated,
.site-mobile-nav__accordion-list > li.is-gated {
  display: none;
}

.site-nav__challenge-link.is-locked:hover,
.site-nav__challenge-link.is-locked:focus-visible,
.site-mobile-nav__challenge-link.is-locked:hover,
.site-mobile-nav__challenge-link.is-locked:focus-visible {
  color: var(--color-text-muted, #94a3b8);
  background: transparent;
}

.site-nav__challenge-link.is-locked::after,
.site-mobile-nav__challenge-link.is-locked::after {
  content: "🔒";
  font-size: 0.75rem;
  line-height: 1;
  flex-shrink: 0;
}

.site-mobile-nav__challenge-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* CTA + hamburger */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--color-primary, #0f766e);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.22);
  transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.site-header__cta:hover,
.site-header__cta:focus-visible {
  background: var(--color-primary-hover, #0d655e);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(15, 118, 110, 0.28);
}

.site-header__menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  color: var(--color-text-primary, #0f172a);
}

.site-header__menu-btn:hover,
.site-header__menu-btn:focus-visible {
  background: var(--color-primary-subtle, rgba(15, 118, 110, 0.06));
}

.site-header__menu-icon,
.site-header__menu-icon::before,
.site-header__menu-icon::after {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header__menu-icon::before,
.site-header__menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.site-header__menu-icon::before { top: -6px; }
.site-header__menu-icon::after { top: 6px; }

.site-header__menu-btn[aria-expanded="true"] .site-header__menu-icon {
  background: transparent;
}

.site-header__menu-btn[aria-expanded="true"] .site-header__menu-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header__menu-btn[aria-expanded="true"] .site-header__menu-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile panel */
.site-mobile-panel {
  position: fixed;
  inset: 0;
  z-index: 300;
  pointer-events: none;
}

.site-mobile-panel.is-open {
  pointer-events: auto;
}

.site-mobile-panel__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.site-mobile-panel.is-open .site-mobile-panel__backdrop {
  opacity: 1;
}

.site-mobile-panel__sheet {
  position: absolute;
  top: 0;
  right: 0;
  width: min(360px, 100%);
  height: 100%;
  background: #ffffff;
  box-shadow: -8px 0 32px rgba(15, 23, 42, 0.12);
  transform: translateX(100%);
  transition: transform 0.28s ease;
  display: flex;
  flex-direction: column;
  padding: 20px;
  overflow-y: auto;
}

.site-mobile-panel.is-open .site-mobile-panel__sheet {
  transform: translateX(0);
}

.site-mobile-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.site-mobile-panel__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary, #0f172a);
}

.site-mobile-panel__close {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-text-secondary, #334155);
}

.site-mobile-nav__link {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0;
  padding: 14px 2px;
  border-bottom: 1px solid var(--color-border, rgba(15, 118, 110, 0.12));
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.025em;
  line-height: 1.35;
  color: var(--color-text-primary, #0f172a);
  text-decoration: none;
  white-space: nowrap;
  word-break: keep-all;
}

.site-mobile-nav__link:hover {
  color: var(--color-primary, #0f766e);
}

.site-mobile-nav__link--diagnose .hit-badge {
  transform: translateY(0);
}

.site-mobile-nav__accordion {
  border-bottom: 1px solid var(--color-border, rgba(15, 118, 110, 0.12));
}

.site-mobile-nav__accordion-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-mobile-nav__accordion-link {
  display: inline-flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  gap: 6px;
  padding: 14px 2px;
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: -0.03em;
  line-height: 1.35;
  color: var(--color-text-primary, #0f172a);
  text-decoration: none;
  white-space: nowrap;
}

.site-mobile-nav__accordion-link:hover {
  color: var(--color-primary, #0f766e);
}

.site-mobile-nav__accordion-link .hit-badge {
  flex-shrink: 0;
  margin-left: 0;
  transform: translateY(0);
}

.site-mobile-nav__accordion-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--color-text-secondary, #64748b);
  cursor: pointer;
}

.site-mobile-nav__accordion-trigger:hover {
  background: rgba(15, 118, 110, 0.06);
  color: var(--color-primary, #0f766e);
}

.site-mobile-nav__chevron {
  flex-shrink: 0;
  color: currentColor;
  transition: transform 0.28s ease;
}

.site-mobile-nav__accordion.is-open > .site-mobile-nav__accordion-row .site-mobile-nav__chevron,
.site-mobile-nav__group[open] > summary .site-mobile-nav__chevron {
  transform: rotate(180deg);
}

.site-mobile-nav__accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.28s ease;
}

.site-mobile-nav__accordion.is-open > .site-mobile-nav__accordion-panel {
  grid-template-rows: 1fr;
}

.site-mobile-nav__accordion-panel-inner {
  overflow: hidden;
  min-height: 0;
}

.site-mobile-nav__accordion-list {
  list-style: none;
  margin: 0 0 10px;
  padding: 0 0 4px 14px;
}

.site-mobile-nav__accordion-list a {
  display: block;
  padding: 9px 8px 9px 6px;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  color: #94a3b8;
  text-decoration: none;
  border-radius: 8px;
  transition: color 0.15s ease, background 0.15s ease;
}

.site-mobile-nav__accordion-list a.site-mobile-nav__challenge-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.site-mobile-nav__accordion-list a:hover {
  color: var(--color-primary, #0f766e);
  background: rgba(15, 118, 110, 0.04);
}

.site-mobile-nav__group {
  border-bottom: 1px solid var(--color-border, rgba(15, 118, 110, 0.12));
  padding: 4px 0;
}

.site-mobile-nav__group summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 4px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text-primary, #0f172a);
}

.site-mobile-nav__group-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.site-mobile-nav__group-label .hit-badge {
  flex-shrink: 0;
  margin-left: 0;
  transform: translateY(0);
}

.site-mobile-nav__group summary::-webkit-details-marker {
  display: none;
}

.site-mobile-nav__group ul {
  list-style: none;
  margin: 0 0 8px;
  padding: 0 0 0 14px;
}

.site-mobile-nav__group a {
  display: block;
  padding: 9px 8px 9px 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #94a3b8;
  text-decoration: none;
}

.site-mobile-nav__group a:hover {
  color: var(--color-primary, #0f766e);
}

.site-mobile-panel__cta {
  margin-top: auto;
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  background: var(--color-primary, #0f766e);
  color: #ffffff;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

@media (max-width: 1100px) and (min-width: 961px) {
  .site-header__inner {
    gap: 16px;
  }

  .site-nav__list {
    gap: 0;
  }

  .site-nav__link {
    padding: 10px 8px;
    font-size: 0.875rem;
    letter-spacing: -0.03em;
  }

  .site-nav__item[data-nav-id="challenge"] > .site-nav__link {
    padding-left: 6px;
    padding-right: 6px;
  }
}

@media (max-width: 960px) {
  .site-header__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
  }

  .site-nav {
    display: none;
  }

  .site-header__actions {
    grid-column: 2;
    justify-self: end;
    margin-left: 0;
  }

  .site-header__menu-btn {
    display: inline-flex;
  }

  .site-header__cta {
    display: none;
  }

  .site-logo__tagline {
    font-size: 0.6875rem;
  }
}

@media (max-width: 480px) {
  .site-header {
    --site-header-height: 72px;
  }

  .site-header__inner {
    padding: 0 14px;
    gap: 12px;
  }

  .site-logo__word {
    font-size: 1rem;
  }
}