#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

#top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(9, 9, 11, 0.7);
  backdrop-filter: var(--glass-blur);
  z-index: 100;
}

.nav-left, .nav-center, .nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-logo {
  font-weight: 700;
  font-size: var(--t-lg);
  background: linear-gradient(to right, #fff, #a1a1aa);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.nav-divider {
  width: 1px;
  height: 20px;
  background: var(--border);
}

.nav-campaign-name {
  font-size: var(--t-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-link {
  font-size: var(--t-xs);
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 10px;
  display: flex;
  align-items: center;
  border-radius: 6px;
  transition: all 0.2s ease;
  font-weight: 500;
}
.nav-link:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

@media (max-width: 900px) {
  .nav-divider, 
  #link-source, 
  #link-github, 
  #link-gmail, 
  .nav-product {
    display: none !important;
  }
  .nav-campaign-name {
    display: none !important;
  }
  
  /* Hide inactive steps on mobile */
  .workflow-step:not(.active) {
    display: none !important;
  }
  .workflow-sep {
    display: none !important;
  }
  .workflow-step.active {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: var(--t-base);
  }
  #workflow-nav {
    justify-content: center;
    padding: var(--space-4) 0;
  }
}

.hidden-desktop { display: none !important; }
@media (max-width: 900px) {
  .hidden-desktop { display: inline-flex !important; }
}

/* Mobile Drawer */
.drawer {
  position: fixed; top: 0; left: 0; bottom: 0; width: 280px;
  background: var(--bg-primary); border-right: 1px solid var(--border);
  z-index: 1000; transform: translateX(-100%);
  transition: transform var(--transition-normal); padding: var(--space-6);
}
.drawer.open { transform: translateX(0); }
.drawer-backdrop {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  z-index: 999; display: none; opacity: 0;
  transition: opacity var(--transition-normal);
}
.drawer-backdrop.open { display: block; opacity: 1; }

#workflow-nav {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  padding: var(--space-6) 0;
  overflow-x: auto;
  scrollbar-width: none;
}
#workflow-nav::-webkit-scrollbar { display: none; }

.workflow-step {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: var(--t-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.workflow-step.active {
  background: rgba(99, 102, 241, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.workflow-step-number {
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 6px;
  border-radius: var(--radius-full);
  font-size: var(--t-xs);
}
.workflow-step.active .workflow-step-number {
  background: var(--primary);
  color: var(--primary-foreground);
}

.workflow-sep {
  color: var(--border-strong);
}

#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-bottom: 80px; /* Space for mobile footer */
}

@media (min-width: 768px) {
  #main {
    padding-bottom: var(--space-10);
  }
}

.wizard-step {
  display: none;
  animation: fadeIn var(--transition-normal);
}
.wizard-step.active {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.section-header {
  margin-bottom: var(--space-4);
}
.section-title {
  font-size: var(--t-3xl);
  font-weight: 600;
  margin: 0 0 var(--space-1);
  letter-spacing: -1px;
}
.section-subtitle {
  color: var(--text-secondary);
  margin: 0;
  font-size: var(--t-base);
}

.split-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 900px) {
  .split-layout {
    grid-template-columns: 1fr 1fr;
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
@media (min-width: 600px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.form-grid-stacked {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 600px) {
  .form-grid-stacked {
    grid-template-columns: repeat(12, 1fr);
  }
  .form-col-4 { grid-column: span 4; }
  .form-col-6 { grid-column: span 6; }
  .form-col-8 { grid-column: span 8; }
  .form-col-12 { grid-column: span 12; }
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 600px) {
  .form-grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

#wizard-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-4);
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  z-index: 100;
}
@media (min-width: 768px) {
  #wizard-footer {
    position: relative;
    background: transparent;
    border-top: none;
    padding: var(--space-6) 0;
    margin-top: auto;
  }
}

.flex-1 { flex: 1; }
.flex-col { display: flex; flex-direction: column; }
.flex-row { display: flex; flex-direction: row; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.w-100 { width: 100%; }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.text-center { text-align: center; }
.text-right { text-align: right; }