frontend/src/components/layout/Topbar.css

.dw-topbar {
  height: var(--topbar-height);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.dw-topbar__workspace {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: 32px;
  padding: 0 var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  flex-shrink: 0;
}
.dw-topbar__workspace:hover {
  background: var(--color-surface-hover);
}

.dw-topbar__workspace-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-success);
}

.dw-topbar__chevron {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.dw-topbar__search {
  flex: 1;
  max-width: 480px;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: 32px;
  padding: 0 var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.dw-topbar__search:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent-soft);
}

.dw-topbar__search input {
  flex: 1;
  background: transparent;
  border: none;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}
.dw-topbar__search input::placeholder {
  color: var(--color-text-muted);
}

.dw-topbar__kbd {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-strong);
  border-radius: 4px;
  padding: 1px 5px;
}

.dw-topbar__search-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: var(--text-base);
  cursor: pointer;
  padding: 0 var(--space-1);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.dw-topbar__search-btn:hover {
  color: var(--color-accent);
}

.dw-topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

.dw-topbar__icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: var(--text-base);
}
.dw-topbar__icon-btn:hover {
  background: var(--color-surface-hover);
}

.dw-topbar__profile {
  position: relative;
}

.dw-topbar__profile-trigger {
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
}

.dw-topbar__menu {
  position: absolute;
  right: 0;
  top: calc(100% + var(--space-2));
  min-width: 180px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-2);
  z-index: 20;
  animation: fade-in var(--transition-fast);
}

.dw-topbar__menu-name {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-1);
}

.dw-topbar__menu-item {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  cursor: pointer;
}
.dw-topbar__menu-item:hover {
  background: var(--color-surface-hover);
}
.dw-topbar__workspace-wrapper {
  position: relative;
}

.dw-topbar__workspace:disabled {
  opacity: 0.6;
  cursor: default;
}

.dw-topbar__menu--workspace {
  left: 0;
  right: auto;
  min-width: 220px;
}

.dw-topbar__menu-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-1) 0;
}

.dw-topbar__create-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
}

.dw-topbar__create-form input {
  height: 30px;
  padding: 0 var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
}

.dw-topbar__create-form button {
  text-align: left;
}

/* Notifications */
.dw-topbar__notif-wrapper {
  position: relative;
}

.dw-topbar__icon-btn {
  position: relative;
}

.dw-topbar__notif-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: var(--color-danger);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  line-height: 1;
}

.dw-topbar__notif-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + var(--space-2));
  width: 340px;
  max-height: 400px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  z-index: 30;
  animation: fade-in var(--transition-fast);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.dw-topbar__notif-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.dw-topbar__notif-viewall {
  background: none;
  border: none;
  color: var(--color-accent);
  font-size: var(--text-xs);
  cursor: pointer;
  text-decoration: none;
  padding: 0;
}
.dw-topbar__notif-viewall:hover {
  text-decoration: underline;
}

.dw-topbar__notif-list {
  overflow-y: auto;
  flex: 1;
}

.dw-topbar__notif-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: background var(--transition-fast);
}

.dw-topbar__notif-item:hover {
  background: var(--color-surface-hover);
}

.dw-topbar__notif-item:last-child {
  border-bottom: none;
}

.dw-topbar__notif-icon {
  flex-shrink: 0;
  width: 20px;
  text-align: center;
  font-size: var(--text-sm);
}

.dw-topbar__notif-message {
  flex: 1;
  font-size: var(--text-xs);
  color: var(--color-text-primary);
  line-height: 1.4;
}

.dw-topbar__notif-time {
  flex-shrink: 0;
  font-size: 10px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.dw-topbar__notif-empty {
  padding: var(--space-6) var(--space-4);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.dw-topbar__theme-btn {
  font-size: 18px;
  transition: transform var(--transition-fast), background var(--transition-fast);
}
.dw-topbar__theme-btn:hover {
  transform: rotate(20deg) scale(1.1);
  background: var(--color-surface-hover);
}
.dw-topbar__upload-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-accent);
  border: none;
  color: #fff;
  font-size: var(--text-lg);
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.dw-topbar__upload-btn:hover {
  background: var(--color-accent-strong);
}

.dw-topbar__upload-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .dw-topbar {
    padding: 0 var(--space-3);
    gap: var(--space-2);
  }

  .dw-topbar__search {
    display: none;
  }

  .dw-topbar__workspace {
    max-width: 120px;
    font-size: var(--text-xs);
    padding: 0 var(--space-2);
  }

  .dw-topbar__notif-dropdown {
    width: calc(100vw - var(--space-6));
    right: calc(-1 * var(--space-3));
  }
}

@media (max-width: 480px) {
  .dw-topbar__upload-btn {
    width: 28px;
    height: 28px;
    font-size: var(--text-sm);
  }

  .dw-topbar__icon-btn {
    width: 28px;
    height: 28px;
  }
}