/* ══════════════════════════════════════════════
   LAYOUT — Split-Layout: Sidebar + Main Content
   ══════════════════════════════════════════════ */

/* ── App Shell ── */
#app {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--surface-root);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  transition: transform var(--transition-base), width var(--transition-base);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-5);
  height: var(--header-height);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.sidebar-brand img {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.sidebar-brand span {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.25em;
  color: var(--text-primary);
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--brand-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  user-select: none;
}

.brand-logo-lg {
  font-size: 2.2rem;
  letter-spacing: 0.3em;
}

/* Sidebar User */
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
}

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

.sidebar-user-info .name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-info .plan {
  font-size: 0.72rem;
  color: var(--brand-primary);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Sidebar Nav */
.sidebar-nav {
  flex: 1;
  padding: var(--space-3) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-3) var(--space-3) var(--space-1);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0.55rem var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.nav-item:hover {
  color: var(--text-primary);
  background: var(--surface-mid);
}

.nav-item.active {
  color: var(--brand-primary);
  background: rgba(139, 92, 246, 0.08);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--brand-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-item.active svg {
  opacity: 1;
  color: var(--brand-primary);
}

.nav-item .badge-dot,
.nav-item .badge-dot-fuchsia {
  margin-left: auto;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-footer .logout-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.sidebar-footer .logout-btn:hover {
  color: var(--semantic-danger);
  background: var(--semantic-danger-bg);
}

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

/* Header */
.main-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface-deep);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 var(--space-8);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.main-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
}

.main-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.header-breadcrumb a {
  color: var(--text-secondary);
}
.header-breadcrumb a:hover {
  color: var(--brand-primary);
}
.header-breadcrumb .sep {
  color: var(--text-muted);
}

/* Main Body */
.main-body {
  flex: 1;
  padding: var(--space-8);
  animation: fadeIn var(--transition-base);
}

/* ── Login Page (no sidebar) ── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  padding: var(--space-4);
}

.login-card {
  width: 100%;
  max-width: 420px;
  animation: slideUp var(--transition-base);
}

.login-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--space-8);
}

.login-logo img {
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-4);
}

.login-logo h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--text-primary);
}

.login-logo p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: var(--space-1);
}

/* ── Hamburger Menu (Mobile) ── */
.hamburger {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.hamburger:hover {
  background: var(--surface-mid);
}
.hamburger svg {
  width: 22px;
  height: 22px;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 90;
  animation: fadeIn var(--transition-base);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hamburger {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
  }

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

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

  .main-content {
    margin-left: 0;
  }

  .main-body {
    padding: var(--space-4);
  }

  .main-header {
    padding: 0 var(--space-4);
  }
}