/* ============================================================
   QuantX Mobile Drawer (shared)
   Full-site navigation drawer for mobile
   ============================================================ */

.quantx-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(2px);
  z-index: 150;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-duration-basic) var(--transition-ease-basic);
}

.quantx-drawer-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.quantx-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 80%;
  max-width: 20rem;
  height: 100vh;
  z-index: 160;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border-subtle);
  transform: translateX(100%);
  transition: transform var(--transition-duration-basic) var(--transition-ease-basic);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.quantx-drawer.open {
  transform: translateX(0);
}

.quantx-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding-inline: var(--header-padding-mobile);
  border-bottom: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

.quantx-drawer__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-duration-basic) var(--transition-ease-basic);
}

.quantx-drawer__close:hover {
  background: var(--color-background-primary-soft-alpha);
}

.quantx-drawer__nav {
  flex: 1;
  padding: 0.75rem;
  overflow-y: auto;
}

.quantx-drawer__nav-item {
  display: block;
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--color-text);
  text-decoration: none;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.125rem;
  transition: background-color var(--transition-duration-basic) var(--transition-ease-basic),
              color var(--transition-duration-basic) var(--transition-ease-basic);
}

.quantx-drawer__nav-item:hover {
  background: var(--color-background-primary-soft-alpha);
  color: var(--color-text-emphasis);
}

.quantx-drawer__nav-item.active {
  background: var(--color-background-primary-soft);
  color: var(--color-text-emphasis);
  font-weight: 500;
}

.quantx-drawer__section-title {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  padding: 1rem 0.75rem 0.375rem;
}

.quantx-drawer__footer {
  padding: 1rem;
  border-top: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

.quantx-drawer__theme-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--color-text);
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background-color var(--transition-duration-basic) var(--transition-ease-basic);
}

.quantx-drawer__theme-btn:hover {
  background: var(--color-background-primary-soft-alpha);
}

/* ---- Drawer auth buttons ---- */
.quantx-drawer__auth {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.quantx-drawer__auth .quantx-drawer__lang-btn {
  grid-column: 1 / -1;
}

.quantx-drawer__login-btn,
.quantx-drawer__register-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  height: 2.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  text-decoration: none;
  line-height: 1;
}

.quantx-drawer__login-btn {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 400;
  cursor: pointer;
  transition: background-color var(--transition-duration-basic) var(--transition-ease-basic);
}

.quantx-drawer__login-btn:hover {
  background: var(--color-background-primary-soft-alpha);
}

.quantx-drawer__register-btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-emphasis);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-duration-basic) var(--transition-ease-basic);
}

.quantx-drawer__register-btn:hover {
  background: var(--color-surface-secondary);
}

/* The header already owns the compact theme control. If the drawer theme
   action is rendered by an older page, show only its active icon. */
.quantx-drawer__theme-btn .icon-sun { display: none; }
.quantx-drawer__theme-btn .icon-moon { display: block; }
[data-theme="dark"] .quantx-drawer__theme-btn .icon-sun { display: block; }
[data-theme="dark"] .quantx-drawer__theme-btn .icon-moon { display: none; }


/* ---- Disabled drawer nav item ---- */
.quantx-drawer__nav-item--disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.quantx-drawer__nav-item--disabled:hover {
  background: transparent;
  color: var(--color-text);
}

.quantx-drawer__badge {
  font-size: 0.6875rem;
  color: var(--color-text-tertiary);
}