* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
}

/* App Header */
.app-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--color-primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.35rem;
  box-shadow: 0 4px 12px rgba(212, 106, 128, 0.3);
}

.brand-title {
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.wedding-countdown {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-gold-light);
  border: 1px solid rgba(197, 160, 89, 0.35);
  color: var(--color-gold-hover);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

[data-theme="dark"] .wedding-countdown {
  color: #F0D59D;
  border-color: rgba(216, 178, 106, 0.35);
}

.header-center {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* View Mode Switcher */
.view-tabs {
  display: flex;
  background-color: var(--bg-surface-alt);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.view-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.86rem;
  font-weight: 500;
  border-radius: calc(var(--radius-md) - 3px);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-tab-btn:hover {
  color: var(--text-primary);
}

.view-tab-btn.active {
  background-color: var(--bg-surface);
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Collaborator Profile Switcher */
.collaborator-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.85rem 0.35rem 0.45rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
}

.collaborator-pill:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-sm);
}

.collaborator-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--partner1-color);
}

.collaborator-info {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  text-align: left;
}

.collaborator-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}

.collaborator-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--color-primary-gradient);
  color: #fff;
  border: none;
  box-shadow: 0 2px 8px rgba(212, 106, 128, 0.25);
}

.btn-primary:hover {
  opacity: 0.92;
  box-shadow: 0 4px 14px rgba(212, 106, 128, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-surface);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-surface-alt);
  border-color: var(--text-muted);
}

.btn-gold {
  background: var(--color-gold);
  color: #fff;
}

.btn-gold:hover {
  background: var(--color-gold-hover);
}

.btn-icon {
  padding: 0.5rem;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
}

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

/* Sub-header Toolbar: Filters & Controls */
.toolbar-section {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
  font-size: 0.9rem;
}

.search-input {
  padding: 0.45rem 0.75rem 0.45rem 2.2rem;
  font-size: 0.85rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface-alt);
  color: var(--text-primary);
  width: 190px;
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--border-focus);
  background: var(--bg-surface);
  width: 230px;
}

.select-filter {
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface-alt);
  color: var(--text-primary);
  outline: none;
  cursor: pointer;
}

.select-filter:focus {
  border-color: var(--border-focus);
}

.zoom-controls {
  display: flex;
  align-items: center;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2px;
}

.zoom-btn {
  border: none;
  background: transparent;
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: calc(var(--radius-md) - 3px);
  cursor: pointer;
}

.zoom-btn.active {
  background: var(--bg-surface);
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* App Main Container */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* Empty State Card */
.empty-state-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.5rem;
  text-align: center;
  max-width: 580px;
  margin: auto;
}

.empty-state-badge {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-primary-light);
  border: 2px dashed var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  animation: pulse-badge 2.5s infinite ease-in-out;
}

@keyframes pulse-badge {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

.empty-state-title {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.empty-state-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.empty-state-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Toast Alerts */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  pointer-events: auto;
  animation: slide-toast 0.3s ease;
  max-width: 360px;
}

.toast.toast-success {
  border-left: 4px solid #217346;
}

.toast.toast-error {
  border-left: 4px solid #C4576C;
}

@keyframes slide-toast {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}