/* Scroll of Fire — Shared Navigation
   File: docs/assets/css/navigation.css
*/

.skip-link {
  position: fixed;
  left: 1rem;
  top: -6rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  background: #000;
  color: #fff;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

/* =========================================================
   GLOBAL HEADER
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 800;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: var(--header-h, 72px);
  padding-block: 0.72rem;
  padding-inline: max(var(--shell-pad, 1rem), calc((100vw - var(--content-wide, 1440px)) / 2 + var(--shell-pad, 1rem)));
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(5, 7, 13, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  isolation: isolate;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  flex: 0 1 18rem;
  color: var(--text, #f4f1e8);
  text-decoration: none;
}

.brand > span:last-child {
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border: 1px solid var(--line-gold, rgba(243, 201, 122, 0.28));
  border-radius: 14px;
  color: var(--gold, #f3c97a);
  background: rgba(243, 201, 122, 0.07);
  box-shadow: 0 0 28px rgba(243, 201, 122, 0.08);
  font-size: 1.4rem;
}

.brand strong {
  display: block;
  overflow: hidden;
  line-height: 1.05;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand small {
  display: block;
  overflow: hidden;
  margin-top: 0.12rem;
  color: var(--muted, #b9c1c7);
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* =========================================================
   DESKTOP NAVIGATION
   ========================================================= */

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.32rem;
  flex: 1 1 auto;
  flex-wrap: nowrap;
  min-width: 0;
}

.site-nav a,
.nav-drop-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.58rem 0.86rem;
  border: 0;
  border-radius: 999px;
  color: var(--text, #f4f1e8);
  background: transparent;
  text-decoration: none;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition:
    color 0.18s ease,
    background 0.18s ease,
    border-color 0.18s ease,
    transform 0.18s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.nav-drop-btn:hover,
.nav-drop-btn:focus-visible {
  background: rgba(255, 255, 255, 0.07);
}

.site-nav a:focus-visible,
.nav-drop-btn:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid var(--gold, #f3c97a);
  outline-offset: 3px;
}

.site-nav a[aria-current="page"] {
  color: var(--gold, #f3c97a);
  background: rgba(243, 201, 122, 0.1);
}

.site-nav a.is-current-section {
  color: var(--gold, #f3c97a);
}

.site-nav a.is-featured {
  color: #061016;
  background: linear-gradient(
    135deg,
    var(--gold, #f3c97a),
    var(--cyan, #7af3ff)
  );
  font-weight: 800;
}

.site-nav a.is-featured:hover,
.site-nav a.is-featured:focus-visible {
  background: linear-gradient(
    135deg,
    var(--gold, #f3c97a),
    var(--cyan, #7af3ff)
  );
  transform: translateY(-1px);
}

/* =========================================================
   MOBILE MENU BUTTON
   ========================================================= */

.nav-toggle {
  position: relative;
  z-index: 2;
  display: none;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  padding: 0;
  border: 1px solid var(--line-gold, rgba(243, 201, 122, 0.28));
  border-radius: 14px;
  color: var(--text, #f4f1e8);
  background: rgba(243, 201, 122, 0.06);
  box-shadow: 0 0 24px rgba(243, 201, 122, 0.06);
  cursor: pointer;
}

.nav-toggle span {
  position: absolute;
  left: 50%;
  display: block;
  width: 22px;
  height: 2px;
  margin: 0;
  border-radius: 999px;
  background: currentColor;
  transform: translateX(-50%);
  transition:
    top 0.2s ease,
    opacity 0.2s ease,
    transform 0.2s ease;
}

.nav-toggle span:nth-child(1) {
  top: 14px;
}

.nav-toggle span:nth-child(2) {
  top: 21px;
}

.nav-toggle span:nth-child(3) {
  top: 28px;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  top: 21px;
  transform: translateX(-50%) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  top: 21px;
  transform: translateX(-50%) rotate(-45deg);
}

/* =========================================================
   CATEGORY DROPDOWNS (5-category nav)
   ========================================================= */

.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-drop-btn {
  gap: 0.35rem;
}

/* Highlight a category button when a child link is active */
.nav-dropdown.has-active-child .nav-drop-btn {
  color: var(--gold, #f3c97a);
  background: rgba(243, 201, 122, 0.08);
}

.nav-drop-menu {
  position: absolute;
  left: 0;
  top: calc(100% + 0.5rem);
  z-index: 850;
  min-width: 230px;
  max-width: min(290px, calc(100vw - 2rem));
  max-height: min(70vh, 620px);
  display: flex;
  flex-direction: column;
  gap: 0.24rem;
  overflow: auto;
  overflow-x: hidden;
  padding: 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  background: rgba(8, 12, 20, 0.98);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition:
    opacity 0.18s ease,
    transform 0.18s ease,
    visibility 0.18s ease;
}

/* Last dropdown aligns to right to avoid overflow */
.nav-dropdown:last-child .nav-drop-menu {
  left: auto;
  right: 0;
}

.nav-dropdown[data-drop-align="end"] .nav-drop-menu {
  left: auto;
  right: 0;
}

.nav-dropdown.is-dropdown-open .nav-drop-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-drop-menu a {
  justify-content: flex-start;
  width: 100%;
  min-height: 42px;
  padding: 0.72rem 0.8rem;
  border-radius: 14px;
  text-align: left;
}

.nav-drop-menu a[aria-current="page"] {
  color: var(--gold, #f3c97a);
  background: rgba(243, 201, 122, 0.08);
}

body.site-menu-open {
  overflow: hidden;
}

/* =========================================================
   THEORY SECONDARY NAVIGATION
   ========================================================= */

.theory-subnav-shell {
  position: sticky;
  top: var(--header-h, 72px);
  z-index: 790;
  padding-inline: max(var(--shell-pad, 1rem), calc((100vw - var(--content-wide, 1440px)) / 2 + var(--shell-pad, 1rem)));
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 7, 13, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.theory-subnav {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 0.75rem 0;
}

.theory-nav-toggle,
.theory-nav-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.58rem 0.82rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text, #f4f1e8);
  background: rgba(255, 255, 255, 0.03);
  text-decoration: none;
  font: inherit;
  font-size: 0.92rem;
  line-height: 1.2;
  cursor: pointer;
  transition:
    color 0.18s ease,
    background 0.18s ease,
    border-color 0.18s ease,
    transform 0.18s ease;
}

.theory-nav-toggle {
  display: none;
  width: 100%;
  justify-content: space-between;
}

.theory-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.theory-nav-links a:hover,
.theory-nav-links a:focus-visible {
  background: rgba(255, 255, 255, 0.07);
}

.theory-nav-links a[aria-current="page"],
.theory-nav-links a.is-current,
.theory-nav-links a.is-current-section {
  color: var(--gold, #f3c97a);
  background: rgba(243, 201, 122, 0.09);
}

/* =========================================================
   TABLET
   ========================================================= */

@media (max-width: 1060px) {
  .site-nav {
    gap: 0.1rem;
  }

  .site-nav a,
  .nav-drop-btn {
    padding: 0.5rem 0.68rem;
    font-size: 0.82rem;
  }
}

@media (max-width: 900px) {
  .theory-subnav-shell {
    top: var(--header-h, 72px);
    padding: 0 1rem;
  }

  .theory-subnav {
    padding: 0.7rem 0;
  }

  .theory-nav-toggle {
    display: inline-flex;
  }

  .theory-nav-links {
    display: none;
    flex-direction: column;
    margin-top: 0.65rem;
  }

  .theory-subnav.is-theory-nav-open .theory-nav-links {
    display: flex;
  }

  .theory-nav-links a {
    width: 100%;
    justify-content: flex-start;
    border-radius: 14px;
    text-align: left;
  }
}

/* =========================================================
   MOBILE NAVIGATION
   ========================================================= */

@media (max-width: 760px) {
  body.site-menu-open {
    overflow-x: hidden;
    overflow-y: auto;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 900;
    min-height: var(--header-h, 72px);
    padding: 0.72rem 1rem;
  }

  .brand {
    max-width: calc(100% - 62px);
  }

  .brand-mark {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
    border-radius: 50%;
    font-size: 1.25rem;
  }

  .brand strong {
    font-size: clamp(1rem, 5vw, 1.35rem);
  }

  .brand small {
    font-size: 0.72rem;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h, 72px) 0 0;
    z-index: 895;
    width: 100%;
    height: calc(100dvh - var(--header-h, 72px));
    display: flex;
    visibility: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    touch-action: pan-y;
    padding:
      1rem
      1rem
      max(2rem, env(safe-area-inset-bottom));
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(5, 7, 13, 0.995);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0.35rem;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition:
      opacity 0.2s ease,
      transform 0.2s ease,
      visibility 0.2s ease;
  }

  .site-nav.is-site-nav-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a,
  .nav-drop-btn {
    width: 100%;
    min-height: 48px;
    justify-content: flex-start;
    padding: 0.78rem 0.9rem;
    border: 1px solid transparent;
    border-radius: 14px;
    text-align: left;
    font-size: 1rem;
  }

  .site-nav a.is-featured {
    justify-content: center;
    margin: 0.15rem 0;
    text-align: center;
  }

  .nav-dropdown {
    width: 100%;
    display: block;
  }

  .nav-drop-btn {
    justify-content: space-between;
  }

  .nav-drop-menu {
    position: static;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    max-height: 0;
    margin-top: 0;
    padding: 0;
    border-width: 0;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.025);
    box-shadow: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    overflow: hidden;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-6px);
    transition:
      max-height 0.2s ease,
      margin-top 0.2s ease,
      padding 0.2s ease,
      opacity 0.2s ease,
      transform 0.2s ease,
      visibility 0.2s ease;
  }

  .nav-dropdown.is-dropdown-open .nav-drop-menu {
    max-height: 70vh;
    margin-top: 0.35rem;
    padding: 0.45rem;
    border-width: 1px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-drop-menu a {
    min-height: 44px;
    padding: 0.68rem 0.75rem;
    font-size: 0.94rem;
  }
}

/* =========================================================
   REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
  .skip-link,
  .site-nav,
  .nav-toggle span,
  .site-nav a,
  .nav-drop-btn,
  .theory-nav-links a {
    transition: none;
  }
}

/* =========================================================
   LIVING CODEX SIGNAL BAR
   ========================================================= */

.living-signal-shell {
  position: sticky;
  top: var(--header-h, 72px);
  z-index: 720;
  padding: 0.3rem max(0.75rem, calc((100vw - var(--content-wide, 1440px)) / 2 + 0.75rem)) 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 7, 13, 0.82);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.living-signal-bar {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: thin;
}

.living-signal-item {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0.45rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  color: var(--muted, #b9c1c7);
  background: rgba(255, 255, 255, 0.035);
  font-size: 0.82rem;
  line-height: 1.35;
  white-space: nowrap;
}

.living-signal-link {
  color: inherit;
  text-decoration: none;
}

.living-signal-link:hover,
.living-signal-link:focus-visible {
  color: var(--text, #f4f1e8);
}

@media (max-width: 760px) {
  .living-signal-shell {
    padding-inline: 0.8rem;
  }
}