/* App Shell — Header, Sidebar, Content */

/* ===== Landing Page Layout ===== */
.landing-page {
  min-height: 100vh;
}

.landing-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.03);
  z-index: 100;
}

.landing-nav .nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.landing-nav .nav-links a {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}

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

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

.landing-content {
  padding-top: var(--header-height);
}

/* ===== App Layout ===== */
.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  min-height: 100vh;
}

/* Header */
.app-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border-light);
  position: sticky;
  top: 0;
  z-index: 50;
}

.app-header .header-left {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.app-header .header-search {
  position: relative;
}

.app-header .header-search input {
  width: 320px;
  padding: var(--space-sm) var(--space-md);
  padding-left: 38px;
  background: var(--glass-bg-subtle);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.app-header .header-search input::placeholder {
  color: var(--text-faint);
}

.app-header .header-search input:focus {
  border-color: var(--primary);
  background: var(--glass-bg);
  box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.15), var(--glow-primary);
}

.app-header .header-search .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
  font-size: var(--text-sm);
}

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

.header-icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
}

.header-icon-btn:hover {
  background: var(--surface);
  color: var(--text-primary);
}

.header-icon-btn .notification-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--error);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg);
}

.header-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  cursor: pointer;
  transition: box-shadow var(--transition-fast);
}

.header-avatar:hover {
  box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--primary), var(--glow-primary);
}

/* Sidebar */
.app-sidebar {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--glass-border-light);
  padding: var(--space-lg) 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-section {
  padding: 0 var(--space-md);
  margin-bottom: var(--space-lg);
}

.sidebar-section-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 var(--space-md);
  margin-bottom: var(--space-sm);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar-link:hover {
  background: var(--glass-bg-subtle);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: var(--primary-light);
  color: var(--primary);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: inset 0 0 12px rgba(124, 92, 252, 0.06);
}

.sidebar-link .link-icon {
  width: 20px;
  text-align: center;
  font-size: var(--text-base);
}

.sidebar-footer {
  margin-top: auto;
  padding: var(--space-md);
}

.sidebar-usage {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
}

.sidebar-usage .usage-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.sidebar-usage .usage-bar {
  height: 6px;
  background: var(--surface-elevated);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: var(--space-xs);
}

.sidebar-usage .usage-bar .usage-fill {
  height: 100%;
  width: 60%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius-pill);
  transition: width var(--transition-slow);
}

.sidebar-usage .usage-text {
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* Main Content Area */
.app-content {
  padding: var(--space-xl);
  overflow-y: auto;
  background: var(--bg);
}

.app-content-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

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

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), #9D7FFF);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  box-shadow: 0 0 16px rgba(124, 92, 252, 0.2);
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
}

.logo-text span {
  color: var(--primary);
}

/* Responsive */
@media (max-width: 1024px) {
  .app-layout {
    grid-template-columns: 1fr;
  }
  .app-sidebar {
    display: none;
  }
  .landing-nav .nav-links {
    display: none;
  }
}

@media (max-width: 768px) {
  .app-header .header-search input {
    width: 200px;
  }
  .app-content {
    padding: var(--space-md);
  }
}