/* ============================================
   NAVIGATION HEADER COMPONENT
   ============================================ */

/* CSS Variables necessárias para o header */
:root {
  --color-primary: #C5A059;
  --color-text-light: #2D2A26;
  --color-text-dark: #E6E2D6;
  --zt-layer-header: 3000;
  --zt-layer-header-menu: 3200;
  --zt-layer-mobile-menu: 3400;
}

.nav {
  background: rgba(249, 245, 235, .94);
  width: 100%;
  padding: 2rem 0;
  border-bottom: 1px solid var(--site-border, rgba(197, 160, 89, 0.42));
  box-shadow: 0 10px 30px rgba(45, 42, 38, 0);
  left: 0;
  position: fixed;
  right: 0;
  top: 0;
  transition: transform 340ms cubic-bezier(.22, 1, .36, 1), background-color 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
  z-index: var(--zt-layer-header);
}

body.has-fixed-nav {
  padding-top: var(--zt-nav-height, 96px);
}

/* Home cinematic hero: image sits under a transparent header */
body.has-fixed-nav.page--home-hero {
  padding-top: 0;
}

.nav--over-hero {
  background: transparent;
  border-bottom-color: transparent;
  box-shadow: none;
}

.nav--over-hero .nav__logo,
.nav--over-hero .nav__logo--site,
.nav--over-hero .nav__link,
.nav--over-hero .nav__button,
.nav--over-hero .nav-user summary {
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 18px rgba(0, 0, 0, 0.35);
}

.nav--over-hero .nav__link {
  color: rgba(255, 255, 255, 0.78);
}

.nav--over-hero .nav__link--active,
.nav--over-hero .nav__logo:hover,
.nav--over-hero .nav__link:hover {
  color: #F5C767;
}

.nav--over-hero .nav__underline {
  background: #F5C767;
}

.nav--over-hero.nav--scrolled,
.nav--over-hero.nav--over-hero-solid {
  background: rgba(10, 10, 10, 0.72);
  border-bottom-color: rgba(212, 175, 55, 0.28);
  backdrop-filter: blur(16px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

.nav--hidden {
  transform: translateY(calc(-100% - 2px));
}

.nav--reading.nav--hidden,
.nav--pinned.nav--hidden {
  transform: translateY(0);
}

.nav--scrolled {
  background: rgba(249, 245, 235, .88);
  box-shadow: 0 10px 30px rgba(45, 42, 38, .08);
  backdrop-filter: blur(14px);
}

.nav--dark {
  background: #0A0A0A;
  border-bottom-color: rgba(212, 175, 55, .22);
}

.nav--lesson {
  background: var(--nav-lesson-bg, #0F1410);
  border-bottom-color: rgba(212, 175, 55, .22);
}

.nav--course {
  background:
    linear-gradient(90deg, var(--zt-logo-burgundy-deep), var(--zt-logo-burgundy) 48%, var(--zt-logo-burgundy-deep));
  border-bottom-color: var(--zt-course-border);
  box-shadow: 0 18px 36px rgb(var(--zt-logo-burgundy-rgb) / .22);
}

.nav--course.nav--scrolled {
  background:
    linear-gradient(90deg, var(--zt-logo-burgundy-deep), rgb(var(--zt-logo-burgundy-rgb) / .92) 48%, var(--zt-logo-burgundy-deep));
  backdrop-filter: blur(16px);
}

.nav--lesson .nav__logo,
.nav--course .nav__logo {
  color: var(--zt-course-text);
}

.nav--lesson .nav__link,
.nav--course .nav__link {
  color: var(--zt-course-muted);
}

.nav--lesson .nav__link--active,
.nav--course .nav__link--active {
  color: var(--zt-course-accent);
}

.nav--lesson .nav__button,
.nav--course .nav__button {
  color: var(--zt-course-muted);
}

.dark .nav {
  background: rgba(26, 25, 24, .94);
  border-bottom-color: var(--site-border, rgba(212, 175, 55, 0.4));
}

.dark .nav--scrolled {
  background: rgba(26, 25, 24, .88);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .24);
}

/* Precisa vir depois de .dark .nav (mesma especificidade, cascata por
   ordem): senão .dark .nav sempre vence e a home fica com header opaco
   mesmo em dark mode. */
.dark .nav--over-hero {
  background: transparent;
  border-bottom-color: transparent;
}

.dark .nav--over-hero.nav--scrolled,
.dark .nav--over-hero.nav--over-hero-solid {
  background: rgba(10, 10, 10, 0.78);
  border-bottom-color: rgba(212, 175, 55, 0.28);
}

.dark .nav--course {
  background:
    linear-gradient(90deg, var(--zt-logo-burgundy-deep), var(--zt-logo-burgundy) 48%, var(--zt-logo-burgundy-deep));
  border-bottom-color: var(--zt-course-border);
}

.dark .nav--course.nav--scrolled {
  background:
    linear-gradient(90deg, var(--zt-logo-burgundy-deep), rgb(var(--zt-logo-burgundy-rgb) / .92) 48%, var(--zt-logo-burgundy-deep));
  box-shadow: 0 18px 36px rgb(var(--zt-logo-burgundy-rgb) / .28);
}

.nav__container {
  max-width: 88rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.nav__left {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__logo {
  font-family: 'Cinzel', serif;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  text-decoration: none;
  transition: color 300ms;
}

.nav__logo--site {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .08em;
  font-size: clamp(.95rem, 1.5vw, 1.15rem);
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.nav__logo--site span {
  display: block;
}

.dark .nav__logo {
  color: var(--color-text-dark);
}

.nav--dark .nav__logo {
  color: #F2EFE5;
}

.nav__logo:hover {
  color: var(--color-primary);
}

.nav__logo--image {
  align-items: center;
  display: flex;
}

.nav__logo--image img {
  display: block;
  height: 36px;
  width: auto;
}

.nav__logo--course img {
  height: 44px;
}

.nav--course .nav__logo--course img {
  height: clamp(2.5rem, 4vw, 3rem);
}

.nav__menu {
  display: none;
  align-items: center;
  gap: clamp(1rem, 2vw, 2.25rem);
  font-family: 'Cinzel', serif;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  flex-wrap: wrap;
  justify-content: center;
}

@media (min-width: 920px) {
  .nav__menu {
    display: flex;
  }
}

.nav__link {
  position: relative;
  padding: 0.5rem 0;
  color: var(--color-text-light);
  text-decoration: none;
}

.dark .nav__link {
  color: var(--color-text-dark);
}

.nav--dark .nav__link {
  color: rgba(242, 239, 229, .72);
}

.nav__link--active {
  color: var(--color-primary);
}

.nav--dark .nav__link--active {
  color: var(--color-primary);
}

.nav__link--active .nav__underline {
  width: 100%;
}

.nav__underline {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-primary);
  transition: width 300ms;
}

.nav__link:hover .nav__underline {
  width: 100%;
}

.nav-group {
  position: relative;
}

.nav-group__summary {
  align-items: center;
  cursor: pointer;
  display: inline-flex;
  gap: var(--space-1);
  list-style: none;
}

.nav-group__summary::-webkit-details-marker {
  display: none;
}

.nav-group__chevron {
  font-size: .95rem;
  line-height: 1;
  transition: transform var(--transition-normal);
}

.nav-group[open] .nav-group__chevron {
  transform: rotate(180deg);
}

.nav__menu .nav-group:hover .nav-group__chevron,
.nav__menu .nav-group:focus-within .nav-group__chevron {
  transform: rotate(180deg);
}

.nav-group__panel {
  background: color-mix(in srgb, var(--color-surface-elevated) 94%, transparent);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  display: none;
  gap: var(--space-1);
  left: 50%;
  min-width: 14rem;
  padding: var(--space-3);
  position: absolute;
  top: calc(100% + var(--space-3));
  transform: translateX(-50%);
  z-index: var(--zt-layer-header-menu);
}

.nav__menu .nav-group[open] > .nav-group__panel,
.nav__menu .nav-group:hover > .nav-group__panel,
.nav__menu .nav-group:focus-within > .nav-group__panel {
  display: grid;
}

.nav-group__panel::before {
  content: "";
  inset: calc(-1 * var(--space-3)) 0 auto;
  height: var(--space-3);
  position: absolute;
}

.nav-group__item {
  color: var(--color-text-primary);
  display: block;
  font-size: .72rem;
  letter-spacing: .12em;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  white-space: nowrap;
}

.nav-group__item:hover,
.nav-group__item.is-active {
  background: color-mix(in srgb, var(--zt-gold) 12%, transparent);
  color: var(--color-primary);
}

.nav--course .nav-group__panel {
  background: color-mix(in srgb, var(--zt-logo-burgundy) 94%, var(--zt-logo-burgundy-deep));
  border-color: var(--zt-course-border);
  box-shadow: 0 20px 40px rgb(var(--zt-logo-burgundy-rgb) / .34);
}

.nav--course .nav-group__item {
  color: var(--zt-course-muted);
}

.nav--course .nav-group__item:hover,
.nav--course .nav-group__item.is-active {
  background: rgb(var(--zt-logo-porcelain-rgb) / .08);
  color: var(--zt-course-accent);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav__button {
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 300ms;
  color: var(--color-text-light);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.dark .nav__button {
  color: var(--color-text-dark);
}

.nav--dark .nav__button {
  color: rgba(242, 239, 229, .78);
}

.nav__button:hover {
  color: var(--color-primary);
}

.nav__icon {
  font-size: 1.25rem;
}

.nav__icon--dark-mode {
  display: inline-block;
}

.dark .nav__icon--dark-mode {
  display: none;
}

.nav__icon--light-mode {
  display: none;
}

.dark .nav__icon--light-mode {
  display: inline-block;
}

.nav-mobile-toggle {
  align-items: center;
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--color-primary) 42%, transparent);
  color: var(--color-text-light);
  cursor: pointer;
  display: none;
  justify-content: center;
  min-height: var(--space-10);
  min-width: var(--space-10);
  padding: var(--space-2);
}

.dark .nav-mobile-toggle,
.nav--dark .nav-mobile-toggle,
.nav--lesson .nav-mobile-toggle,
.nav--course .nav-mobile-toggle {
  color: var(--color-text-dark);
}

.nav--over-hero .nav-mobile-toggle {
  border-color: rgba(245, 199, 103, .46);
  color: rgba(255, 255, 255, .92);
  text-shadow: 0 1px 18px rgba(0, 0, 0, .35);
}

.nav-mobile-toggle:hover,
.nav-mobile-toggle:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
  outline: none;
}

.nav-mobile[hidden] {
  display: none;
}

.nav-mobile {
  inset: 0;
  position: fixed;
  z-index: var(--zt-layer-mobile-menu);
}

/* backdrop-filter no .nav (.nav--scrolled etc.) vira containing block pra
   descendentes fixed — o .nav-mobile (fixed, inset:0) fica preso à altura
   da barra em vez de cobrir a viewport inteira. Desliga o filtro enquanto
   o menu está aberto (ele já fica coberto pelo overlay, não se perde
   nada visualmente). */
body.has-mobile-menu-open .nav {
  backdrop-filter: none;
}

.nav-mobile__backdrop {
  background: rgba(0, 0, 0, .58);
  inset: 0;
  position: absolute;
}

.nav-mobile__panel {
  background: color-mix(in srgb, var(--color-surface-elevated) 96%, transparent);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  color: var(--color-text-primary);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  height: 100%;
  margin-left: auto;
  max-width: min(25rem, calc(100vw - var(--space-6)));
  overflow-y: auto;
  padding: var(--space-6);
  position: relative;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  width: 100%;
}

.nav-mobile.is-open .nav-mobile__panel {
  transform: translateX(0);
}

.nav--course .nav-mobile__panel {
  background: color-mix(in srgb, var(--zt-logo-burgundy) 88%, var(--zt-logo-burgundy-deep));
  border-left-color: var(--zt-course-border);
  color: var(--zt-course-text);
}

.nav-mobile__header {
  align-items: center;
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  font-family: 'Cinzel', serif;
  justify-content: space-between;
  letter-spacing: .12em;
  padding-bottom: var(--space-4);
  text-transform: uppercase;
}

.nav-mobile__close,
.nav-mobile__quick-actions button,
.nav-mobile__quick-actions a,
.nav-mobile__links a,
.nav-mobile-group summary,
.nav-mobile__account-links a,
.nav-mobile__account-links button {
  color: inherit;
  font: inherit;
}

.nav-mobile__close {
  align-items: center;
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--color-primary) 38%, transparent);
  cursor: pointer;
  display: inline-flex;
  justify-content: center;
  min-height: var(--space-10);
  min-width: var(--space-10);
  padding: var(--space-2);
}

.nav-mobile__quick-actions {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.nav-mobile__quick-actions button,
.nav-mobile__quick-actions a {
  align-items: center;
  background: color-mix(in srgb, var(--color-action-primary) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-action-primary) 34%, transparent);
  cursor: pointer;
  display: inline-flex;
  font-family: 'Cinzel', serif;
  font-size: .72rem;
  gap: var(--space-2);
  justify-content: center;
  letter-spacing: .1em;
  min-height: var(--space-12);
  padding: var(--space-3);
  text-decoration: none;
  text-transform: uppercase;
}

.nav-mobile__quick-actions button:hover,
.nav-mobile__quick-actions a:hover,
.nav-mobile__quick-actions button:focus-visible,
.nav-mobile__quick-actions a:focus-visible,
.nav-mobile__close:hover,
.nav-mobile__close:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-primary);
  outline: none;
}

.nav-mobile__links,
.nav-mobile__account-links {
  display: grid;
  gap: var(--space-2);
}

.nav-mobile__links > a,
.nav-mobile-group summary,
.nav-mobile-group div a,
.nav-mobile__account-links a,
.nav-mobile__account-links button {
  align-items: center;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  display: flex;
  font-family: 'Cinzel', serif;
  font-size: .78rem;
  justify-content: space-between;
  letter-spacing: .1em;
  min-height: var(--space-12);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  text-decoration: none;
  text-transform: uppercase;
  width: 100%;
}

.nav-mobile__links > a:hover,
.nav-mobile__links > a:focus-visible,
.nav-mobile-group summary:hover,
.nav-mobile-group summary:focus-visible,
.nav-mobile-group div a:hover,
.nav-mobile-group div a:focus-visible,
.nav-mobile__account-links a:hover,
.nav-mobile__account-links a:focus-visible,
.nav-mobile__account-links button:hover,
.nav-mobile__account-links button:focus-visible {
  border-color: color-mix(in srgb, var(--color-primary) 38%, transparent);
  color: var(--color-primary);
  outline: none;
}

.nav-mobile__links a.is-active,
.nav-mobile-group:has(a.is-active) summary {
  color: var(--color-primary);
}

.nav-mobile-group {
  border-block: 1px solid var(--color-border-subtle);
}

.nav-mobile-group summary {
  list-style: none;
}

.nav-mobile-group summary::-webkit-details-marker {
  display: none;
}

.nav-mobile-group summary .material-icons {
  transition: transform var(--transition-normal);
}

.nav-mobile-group[open] summary .material-icons {
  transform: rotate(180deg);
}

.nav-mobile-group div {
  display: grid;
  gap: var(--space-1);
  padding: 0 0 var(--space-3) var(--space-4);
}

.nav-mobile-group div a {
  color: var(--color-text-secondary);
  font-size: .7rem;
  min-height: var(--space-10);
}

.nav--course .nav-mobile-group div a {
  color: var(--zt-course-muted);
}

.nav-mobile__account {
  border-top: 1px solid var(--color-border-subtle);
  display: grid;
  gap: var(--space-4);
  margin-top: auto;
  padding-top: var(--space-5);
}

.nav-mobile__account-head {
  align-items: center;
  display: flex;
  gap: var(--space-4);
}

.nav-mobile__account-head img,
.nav-mobile__account-head .nav-user__avatar {
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-full);
  flex: 0 0 auto;
  height: var(--space-12);
  object-fit: cover;
  width: var(--space-12);
}

.nav-mobile__account-head div {
  min-width: 0;
}

.nav-mobile__account-head strong,
.nav-mobile__account-head small {
  display: block;
}

.nav-mobile__account-head strong {
  overflow-wrap: anywhere;
}

.nav-mobile__account-head small {
  color: var(--color-text-secondary);
  font-size: .82rem;
}

.nav--course .nav-mobile__account-head small {
  color: var(--zt-course-muted);
}

.nav-mobile__account-links form {
  margin: 0;
}

.nav-mobile__account-links button {
  background: transparent;
}

body.has-mobile-menu-open {
  overflow: hidden;
}

@media (max-width: 919px) {
  .nav__container {
    gap: var(--space-4);
  }

  .nav__actions {
    display: none;
  }

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

@media (max-width: 520px) {
  .nav {
    padding: 1.2rem 0;
  }

  .nav__container {
    padding: 0 1rem;
  }

  .nav__logo {
    font-size: 1.2rem;
  }

  .nav__logo--site {
    font-size: .72rem;
  }
}