/* ============================================
   SPEECH EZ SKOOL — App Layout
   Sidebar, header, responsive shell
   ============================================ */

/* --- App Shell --- */
.app {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: white;
  border-right: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition-base);
}

.sidebar__header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-navy-50);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.sidebar__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  font-weight: 800;
  flex-shrink: 0;
}

.sidebar__logo-text {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-navy);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.sidebar__logo-text small {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-md) var(--space-sm);
  overflow-y: auto;
}

.sidebar__section-label {
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-md) var(--space-md) var(--space-sm);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 10px var(--space-md);
  border-radius: var(--radius-md);
  color: var(--color-text-light);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  position: relative;
}

.sidebar__link:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

.sidebar__link--active {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  font-weight: 600;
}

.sidebar__link--active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--color-primary);
  border-radius: 0 2px 2px 0;
}

.sidebar__link-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.sidebar__link-badge {
  margin-left: auto;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: white;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Sidebar Footer — User Card */
.sidebar__footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-navy-50);
}

.sidebar__user {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.sidebar__user:hover {
  background: var(--color-cream);
}

.sidebar__user-info {
  flex: 1;
  min-width: 0;
}

.sidebar__user-name {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-navy);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__user-level {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* XP Progress in Sidebar */
.sidebar__xp {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-sm) 0;
}

.sidebar__xp-text {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

/* --- Main Content Area --- */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background: var(--glass-bg-heavy);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  z-index: 50;
}

.header__left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-navy);
}

.header__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.header__right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__search {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-cream);
  border-radius: var(--radius-full);
  padding: 8px 16px;
  min-width: 240px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.header__search:focus-within {
  border-color: var(--color-primary-200);
  background: white;
  box-shadow: 0 0 0 3px rgba(74, 191, 175, 0.1);
}

.header__search-icon {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.header__search input {
  border: none;
  background: none;
  outline: none;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  width: 100%;
}

.header__search input::placeholder {
  color: var(--color-text-faint);
}

.header__notification {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-cream);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-size: 18px;
}

.header__notification:hover {
  background: var(--color-primary-50);
}

.header__notification-dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid white;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: none;
  background: none;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px;
}

.mobile-toggle__line {
  width: 22px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-toggle--active .mobile-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle--active .mobile-toggle__line:nth-child(2) {
  opacity: 0;
}
.mobile-toggle--active .mobile-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Page Content --- */
.page-content {
  flex: 1;
  padding: var(--space-xl);
  max-width: var(--content-wide-max-width);
  width: 100%;
}

.page-content--centered {
  margin: 0 auto;
}

.page-content--narrow {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* --- Page Header --- */
.page-header {
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
}

.page-header__left {
  flex: 1;
}

.page-header__title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-xs);
}

.page-header__description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* --- Overlay for Mobile Sidebar --- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(30, 42, 58, 0.4);
  z-index: 99;
}

.sidebar-overlay--active {
  display: block;
}

/* --- Bottom Mobile Nav --- */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: white;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  z-index: 100;
  padding: 0 var(--space-sm);
}

.mobile-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 100%;
}

.mobile-nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--color-text-muted);
  font-size: 10px;
  font-weight: 500;
  font-family: var(--font-heading);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  border: none;
  background: none;
  cursor: pointer;
}

.mobile-nav__link-icon {
  font-size: 22px;
  line-height: 1;
}

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

.mobile-nav__link--active .mobile-nav__link-icon {
  transform: scale(1.1);
}

/* --- Responsive --- */

/* Tablet */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar--open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }

  .main {
    margin-left: 0;
  }

  .mobile-toggle {
    display: flex;
  }

  .header__search {
    min-width: 180px;
  }
}

/* Mobile */
@media (max-width: 640px) {
  .header__search {
    display: none;
  }

  .header__subtitle {
    display: none;
  }

  .page-content {
    padding: var(--space-md);
    padding-bottom: 80px;
  }

  .mobile-nav {
    display: block;
  }

  .page-header {
    flex-direction: column;
  }

  .page-header__title {
    font-size: var(--font-size-xl);
  }
}

/* Desktop wide */
@media (min-width: 1400px) {
  .page-content {
    padding: var(--space-2xl) var(--space-3xl);
  }
}