/* Top Bar */
.top-bar {
  display: flex;
  flex-direction: row;
  align-items: center;
  background: var(--md-surface-card);
  box-shadow: var(--md-elevation-2);
  min-height: 48px;
  padding: 0 16px;
  gap: 8px;
  z-index: 10;
}

/* Buttons */
.btn-text {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  color: var(--md-primary);
  border: none;
  border-radius: var(--md-radius-button);
  padding: 8px 16px;
  font-family: var(--md-font-family);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn-text:hover {
  background: rgba(49, 120, 198, 0.08);
}
.btn-text:active {
  background: rgba(49, 120, 198, 0.16);
}

.btn-filled {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--md-primary);
  color: var(--md-on-primary);
  border: none;
  border-radius: var(--md-radius-button);
  padding: 8px 20px;
  font-family: var(--md-font-family);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--md-elevation-button);
  transition: box-shadow 0.15s ease, opacity 0.15s ease;
}
.btn-filled:hover {
  opacity: 0.92;
  box-shadow: var(--md-elevation-active);
}
.btn-filled:active {
  opacity: 0.85;
}

/* Sidebar */
.sidebar {
  width: 224px;
  flex-shrink: 0;
  background: var(--md-surface-card);
  border-radius: var(--md-radius-container);
  box-shadow: var(--md-elevation-1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 12px 8px;
  gap: 4px;
}

.sidebar-search {
  width: 100%;
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-item);
  padding: 8px 12px 8px 40px;
  font-family: var(--md-font-family);
  font-size: 13px;
  color: var(--md-on-surface);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.sidebar-search::placeholder {
  color: var(--md-on-surface-tertiary);
}
.sidebar-search:focus {
  border-color: var(--md-primary);
  box-shadow: 0 0 0 2px rgba(49, 120, 198, 0.15);
}

/* Category */
.category-header {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  padding: 8px 8px 4px;
}

.category-label {
  color: var(--md-on-surface);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Demo Items */
.demo-item {
  border-radius: var(--md-radius-item);
  padding: 10px 16px;
  background: var(--md-surface-inactive);
  cursor: pointer;
  transition: background 0.15s ease, box-shadow 0.15s ease, color 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border: none;
  width: 100%;
  text-align: left;
}
.demo-item:hover {
  background: #eceff3;
}
.demo-item.active {
  background: var(--md-primary);
  box-shadow: var(--md-elevation-active);
  color: var(--md-on-primary);
}

.demo-title {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.3;
}

.demo-desc {
  font-size: 11px;
  color: var(--md-on-surface-tertiary);
  line-height: 1.4;
}
.demo-item.active .demo-desc {
  color: rgba(255, 255, 255, 0.75);
}

/* Tabs */
.tab {
  border-radius: var(--md-radius-item);
  padding: 10px 16px;
  background: var(--md-surface-inactive);
  cursor: pointer;
  transition: background 0.15s ease, box-shadow 0.15s ease, color 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  font-family: var(--md-font-family);
  font-size: 13px;
  font-weight: 500;
  color: var(--md-on-surface);
}
.tab:hover {
  background: #eceff3;
}
.tab.active {
  background: var(--md-primary);
  box-shadow: var(--md-elevation-active);
  color: var(--md-on-primary);
}

/* Editor Panel */
.editor-panel {
  flex: 1;
  background: var(--md-surface-card);
  border-radius: var(--md-radius-container);
  box-shadow: var(--md-elevation-1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* URL Bar */
.url-bar {
  background: var(--md-surface);
  border-radius: var(--md-radius-item);
  padding: 8px 16px;
  font-family: var(--md-font-mono);
  font-size: 13px;
  color: var(--md-on-surface-secondary);
  border: 1px solid var(--md-outline);
  outline: none;
  transition: border-color 0.15s ease;
}
.url-bar:focus {
  border-color: var(--md-primary);
}

/* Chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--md-outline);
  border-radius: 8px;
  padding: 4px 10px;
  font-family: var(--md-font-family);
  font-size: 11px;
  font-weight: 500;
  color: var(--md-on-surface-secondary);
  background: transparent;
  cursor: default;
  transition: background 0.15s ease;
}
.chip:hover {
  background: var(--md-surface-inactive);
}

/* ------------------------------------------------------------------ */
/* Responsive                                                         */
/* ------------------------------------------------------------------ */

/* Tablet: hide sidebar, stack editor/preview */
@media (max-width: 900px) {
  .sidebar {
    display: none;
  }

  .body-row {
    padding: 8px !important;
    gap: 8px !important;
  }

  .editor-split {
    flex-direction: column !important;
  }

  .editor-split > * {
    flex: none !important;
    height: 50% !important;
  }

  .tab {
    padding: 8px 12px;
    font-size: 12px;
  }
}

/* Mobile: compact top bar, smaller tabs */
@media (max-width: 600px) {
  .top-bar {
    padding: 0 8px;
    min-height: 44px;
    gap: 4px;
  }

  .top-bar-logo {
    font-size: 14px !important;
  }

  .btn-text span:not(.material-symbols-outlined) {
    display: none;
  }

  .btn-filled span:not(.material-symbols-outlined) {
    display: none;
  }

  .btn-text {
    padding: 8px;
  }

  .btn-filled {
    padding: 8px 12px;
  }

  .chip {
    display: none;
  }

  .tabs-row {
    gap: 4px !important;
    padding: 6px 8px !important;
    overflow-x: auto;
  }

  .tab {
    padding: 6px 10px;
    font-size: 11px;
    white-space: nowrap;
  }

  .body-row {
    padding: 4px !important;
    gap: 4px !important;
  }

  .preview-bar {
    padding: 6px 8px !important;
  }
}

/* Mobile sidebar drawer — hidden on desktop */
.sidebar-drawer {
  display: none;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 100;
}

.sidebar-panel {
  display: none;
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100%;
  background: var(--md-surface-card);
  box-shadow: 4px 0 16px rgba(0, 0, 0, 0.12);
  z-index: 101;
  transition: left 0.25s ease;
  overflow-y: auto;
  padding: 12px 8px;
  flex-direction: column;
  gap: 4px;
}

@media (max-width: 900px) {
  .sidebar-drawer {
    display: flex;
  }

  .sidebar-panel {
    display: flex;
  }

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

  .sidebar-panel.open {
    left: 0;
  }
}