/* navigation styles extracted from landing.css */
/* includes: .landing-nav, .theme-toggle, .sound-toggle-btn, .user-menu, hamburger menu */

/* navigation */
.landing-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: var(--landing-nav-bg);
  border-bottom: 1px solid var(--landing-nav-border);
  transition: background 0.3s ease;
}

.landing-nav.is-scrolled {
  background: var(--landing-nav-bg-scrolled);
}

.landing-nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.landing-nav-logo svg {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

.landing-nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.landing-nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.3s ease;
  letter-spacing: -0.01em;
}

.landing-nav-links a:hover {
  color: var(--text-primary);
}

.landing-nav-links a.active {
  color: var(--accent);
  font-weight: 600;
}

.landing-nav-links--learning {
  gap: 14px;
}

.landing-nav-cta {
  background: var(--accent);
  color: var(--accent-contrast) !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background 0.3s ease, transform 0.2s ease !important;
}

.landing-nav-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* theme toggle (landing pages) */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--button-ghost-border);
  background: var(--button-ghost-bg);
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.theme-toggle:hover {
  background: var(--button-ghost-bg-hover);
  border-color: var(--button-ghost-border-hover);
  transform: translateY(-1px);
}

.theme-toggle-icon {
  width: 16px;
  height: 16px;
  opacity: 0.9;
}

.theme-toggle-icon--moon {
  display: none;
}

[data-theme="dark"] .theme-toggle-icon--sun {
  display: none;
}

[data-theme="dark"] .theme-toggle-icon--moon {
  display: block;
}

/* theme toggle (styles.css version - learn module pages with .academy-header-actions) */
.academy-header-actions .theme-toggle {
    position: absolute;
    right: 0;
    top: 0.25rem;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    background: var(--color-surface);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-smooth);
    -webkit-tap-highlight-color: transparent;
}

.academy-header-actions .theme-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.academy-header-actions .theme-toggle [data-lucide] {
    width: 16px;
    height: 16px;
}

.academy-header-actions .theme-toggle .icon-moon { display: block; }
.academy-header-actions .theme-toggle .icon-sun { display: none; }
html.dark .academy-header-actions .theme-toggle .icon-moon { display: none; }
html.dark .academy-header-actions .theme-toggle .icon-sun { display: block; }

/* nav credit badge */
.nav-credits-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: 999px;
  white-space: nowrap;
  line-height: 1;
}

.nav-credits-badge svg {
  flex-shrink: 0;
}

/* hamburger menu button */
.landing-nav-hamburger {
  display: none;
  background: none;
  border: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  color: var(--text-primary);
  transition: opacity 0.2s ease;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

.landing-nav-hamburger:hover {
  opacity: 0.7;
}

.landing-nav-hamburger:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 8px;
}

.landing-nav-hamburger-icon {
  width: 22px;
  height: 16px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.landing-nav-hamburger-line {
  width: 100%;
  height: 2.5px;
  background: currentColor;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.landing-nav.nav-open .landing-nav-hamburger-line:nth-child(1) {
  transform: translateY(6.75px) rotate(45deg);
}

.landing-nav.nav-open .landing-nav-hamburger-line:nth-child(2) {
  opacity: 0;
}

.landing-nav.nav-open .landing-nav-hamburger-line:nth-child(3) {
  transform: translateY(-6.75px) rotate(-45deg);
}

/* sound toggle (landing.css version - uses --text-muted / --text vars) */
.sound-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  transition: color 0.2s, background-color 0.2s;
  padding: 0;
}

.sound-toggle-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] .sound-toggle-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

@media (max-width: 480px) {
  .sound-toggle-btn {
    width: 44px;
    height: 44px;
  }
}

/* sound toggle (styles.css version - uses --color-text-muted / --color-text vars) */
/* this override applies on learn module pages which use styles.css variables */
/*
.sound-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: 6px;
    transition: color 0.2s, background-color 0.2s;
    padding: 0;
}

.sound-toggle-btn:hover {
    color: var(--color-text);
    background: var(--color-border);
}

@media (max-width: 480px) {
    .sound-toggle-btn {
        width: 28px;
        height: 28px;
    }

    .sound-toggle-btn svg {
        width: 14px;
        height: 14px;
    }
}
*/

/* user menu */
.user-menu {
  position: relative;
}

.user-menu-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
}

.user-menu-avatar:hover {
  background: rgba(52, 211, 153, 0.25);
  transform: scale(1.05);
}

.user-menu-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.08) 0%,
    rgba(255, 255, 255, 0.03) 100%
  );
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.user-menu-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

[data-theme="light"] .user-menu-dropdown {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.9) 0%,
    rgba(255, 255, 255, 0.75) 100%
  );
  border-color: rgba(0, 0, 0, 0.1);
}

.user-menu-email {
  padding: 8px 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-menu-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.user-menu-item {
  display: block;
  width: 100%;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.user-menu-item:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

/* ---- responsive: nav-only rules from mixed @media (max-width: 768px) ---- */

/* note: the main 768px media query in landing.css mixes nav, hero, orb, footer,
   and other selectors. the nav-specific rules are duplicated here for reference.
   the original mixed media query in landing.css is NOT modified. */

@media (max-width: 768px) {
  body.nav-menu-open {
    overflow: hidden;
  }

  .landing-nav {
    padding: 14px 20px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
  }

  .landing-nav::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.58);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
    z-index: calc(var(--z-dropdown) - 1);
  }

  [data-theme="light"] .landing-nav::before {
    background: rgba(15, 23, 42, 0.45);
  }

  .landing-nav.nav-open::before {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .landing-nav-hamburger {
    display: block;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: calc(var(--z-dropdown) + 1);
  }

  .landing-nav-links {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(6, 8, 12, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: none;
    padding: 80px 24px 32px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
    overflow-y: auto;
    z-index: var(--z-dropdown);
    pointer-events: none;
  }

  [data-theme="light"] .landing-nav-links {
    background: rgba(248, 250, 252, 0.99);
    border-top: none;
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.08);
  }

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

  .landing-nav-links a:not(.landing-nav-cta):not(.auth-nav-btn) {
    display: block;
    padding: 16px 4px;
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    border-bottom: 1px solid var(--glass-border);
  }

  .landing-nav.nav-open .landing-nav-links a:not(.landing-nav-cta):not(.auth-nav-btn) {
    display: block;
  }

  .landing-nav-links a:last-of-type:not(.landing-nav-cta):not(.auth-nav-btn) {
    border-bottom: none;
  }

  [data-theme="light"] .landing-nav-links a:not(.landing-nav-cta):not(.auth-nav-btn) {
    border-bottom-color: rgba(15, 23, 42, 0.08);
  }

  .landing-nav-cta {
    margin-top: 8px;
    display: block;
    text-align: center;
  }

  .landing-nav-links--learning a {
    display: block;
    padding: 16px 4px;
  }

  .landing-nav.nav-open .landing-nav-links--learning a {
    display: inline-flex;
  }

  /* auth buttons in mobile nav */
  .landing-nav-links .auth-nav-btn {
    display: block;
    width: 100%;
    text-align: center;
    font-size: 1rem;
    padding: 14px 0;
  }

  .landing-nav-links .auth-nav-btn--signup {
    margin-top: 12px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
  }

  .landing-nav-links .auth-nav-btn--login {
    margin-top: 16px;
    padding: 14px 0;
    color: var(--text-secondary);
  }

  .theme-toggle {
    width: 44px;
    height: 44px;
  }

  .landing-nav-links .theme-toggle {
    margin: 16px auto 0;
  }

  .user-menu-dropdown {
    right: 0;
    max-width: calc(100vw - 32px);
  }
}