:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-hover: #243044;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --text-muted: #8b9cb3;
  --accent: #3d9eff;
  --accent-dim: #2563b8;
  --string: #7ee787;
  --number: #79c0ff;
  --boolean: #ff7b72;
  --null: #d2a8ff;
  --key: #ffab70;
  --radius: 10px;
  --font: "Segoe UI", system-ui, sans-serif;
  --mono: "Cascadia Code", "Consolas", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--surface);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

header {
  margin-bottom: 1.5rem;
}

header h1 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
  font-weight: 600;
}

header p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.storage-info {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.storage-info-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.75rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  list-style: none;
  user-select: none;
  transition: background 0.15s;
}

.storage-info-summary::-webkit-details-marker {
  display: none;
}

.storage-info summary::marker {
  content: "";
}

.storage-info:not([open]) .storage-info-summary:hover {
  background: var(--surface-hover);
}

.storage-info[open] .storage-info-summary {
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.12);
}

.storage-info-summary-hint {
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--accent);
}

.storage-info-body {
  padding: 0.85rem 1.15rem 1rem;
}

.storage-info-text {
  margin: 0 0 0.65rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.storage-info-text:last-child {
  margin-bottom: 0;
}

.storage-info-hint {
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  margin-top: 0.5rem !important;
  margin-bottom: 0 !important;
}

.path-line {
  display: inline-block;
  margin-top: 0.25rem;
  word-break: break-all;
}

.edit-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.65rem;
}

.editor-hint {
  margin: 0 0 0.65rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.json-editor {
  display: block;
  width: 100%;
  min-height: min(70vh, 560px);
  margin: 0;
  padding: 1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  resize: vertical;
}

.json-editor:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  resize: none;
}

.json-editor:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-dim);
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  background: var(--surface);
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
  margin-bottom: 1.25rem;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--surface-hover);
}

.dropzone input[type="file"] {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.dropzone-label {
  display: block;
  cursor: pointer;
}

.dropzone-title {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.dropzone-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1rem;
}

.btn {
  font-family: inherit;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn:hover {
  background: var(--surface-hover);
  border-color: var(--accent-dim);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent);
}

.tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.tab {
  font-family: inherit;
  font-size: 0.875rem;
  padding: 0.6rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

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

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.error-banner {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  background: rgba(255, 99, 99, 0.15);
  border: 1px solid rgba(255, 99, 99, 0.4);
  color: #ffb4b4;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.tree {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow: auto;
  max-height: min(70vh, 600px);
}

.tree-node {
  margin-left: 0;
}

.tree-children {
  margin-left: 1rem;
  border-left: 1px solid var(--border);
  padding-left: 0.65rem;
}

.tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  margin-right: 0.25rem;
  border: none;
  background: var(--surface-hover);
  color: var(--text-muted);
  border-radius: 3px;
  cursor: pointer;
  font-size: 0.65rem;
  vertical-align: middle;
}

.tree-toggle:empty {
  visibility: hidden;
  pointer-events: none;
}

.tree-row {
  margin: 0.15rem 0;
  word-break: break-word;
}

.key {
  color: var(--key);
}

.val-string {
  color: var(--string);
}

.val-number {
  color: var(--number);
}

.val-boolean {
  color: var(--boolean);
}

.val-null {
  color: var(--null);
}

.val-bracket {
  color: var(--text-muted);
}

.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
}

.meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}