/* ── Reset & Base ─────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #1a1a2e;
  --bg-panel: #16213e;
  --bg-input: #0f1729;
  --bg-hover: #1a2744;
  --text: #e0e0e0;
  --text-dim: #7a8ba0;
  --accent: #64ffda;
  --border: #2a3a5c;
  --error: #ff5370;
  --key-color: #82aaff;
  --string-color: #c3e88d;
  --number-color: #f78c6c;
  --bool-color: #c792ea;
  --null-color: #ff5370;
  --bracket-color: #7a8ba0;
  --font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', 'Cascadia Code', Consolas, monospace;
  --radius: 8px;
}

[data-theme="light"] {
  --bg: #f5f5f5;
  --bg-panel: #ffffff;
  --bg-input: #fafafa;
  --bg-hover: #eef2f7;
  --text: #1a1a2e;
  --text-dim: #6b7280;
  --accent: #0d9373;
  --border: #d1d5db;
  --error: #dc2626;
  --key-color: #2563eb;
  --string-color: #16a34a;
  --number-color: #ea580c;
  --bool-color: #9333ea;
  --null-color: #dc2626;
  --bracket-color: #9ca3af;
}

html, body {
  height: 100%;
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--text);
}

/* ── Header ──────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.tagline {
  font-size: 0.75rem;
  color: var(--text-dim);
}

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text);
  transition: border-color 0.2s;
}

#theme-toggle:hover {
  border-color: var(--accent);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.github-link {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s;
}

.github-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ── Toolbar ─────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 24px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.toolbar button {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}

.toolbar button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.toolbar button:active {
  transform: scale(0.97);
}

.depth-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.depth-controls span {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.depth-label {
  min-width: 20px;
  text-align: center;
}

.depth-step-btn {
  width: 26px;
  height: 26px;
  padding: 0 !important;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}


#clear-btn {
  margin-left: auto;
}

/* ── Main Layout ─────────────────────────── */
main {
  display: flex;
  height: calc(100vh - 95px);
}

.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.input-panel {
  border-right: 1px solid var(--border);
}

.panel-actions {
  display: flex;
  gap: 6px;
}

.panel-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text);
  cursor: pointer;
  text-transform: none;
  letter-spacing: normal;
  transition: all 0.15s;
}

.panel-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  user-select: none;
}

/* ── Input ────────────────────────────────── */

/* ── Tree Error Banner ────────────────────── */
.tree-error-banner {
  padding: 6px 12px;
  margin-bottom: 8px;
  background: rgba(255, 213, 79, 0.12);
  border: 1px solid rgba(255, 213, 79, 0.3);
  border-radius: 6px;
  color: #ffd54f;
  font-size: 0.72rem;
  line-height: 1.4;
}

/* ── Raw Error Output ─────────────────────── */
.raw-error-output {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
}

.raw-line {
  display: flex;
  padding: 0 8px;
}

.raw-line.error-line {
  background: rgba(255, 83, 112, 0.15);
  border-left: 3px solid var(--error);
}

.line-number {
  color: var(--text-dim);
  opacity: 0.5;
  margin-right: 12px;
  user-select: none;
  flex-shrink: 0;
}

.line-content {
  white-space: pre;
}

/* ── Input Wrapper & Backdrop ─────────────── */
.input-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg-input);
}

.input-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: transparent;
  pointer-events: none;
  tab-size: 2;
  will-change: transform;
}

.backdrop-line {
  display: block;
}

.input-backdrop .error-line {
  background: rgba(255, 83, 112, 0.15);
  margin: 0 -16px;
  padding: 0 16px;
  border-left: 3px solid var(--error);
}

#json-input {
  position: relative;
  width: 100%;
  height: 100%;
  background: transparent;
  overscroll-behavior: none;
  color: var(--text);
  border: none;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  resize: none;
  outline: none;
  tab-size: 2;
}

#json-input::placeholder {
  color: var(--text-dim);
}

/* ── Error Bar ────────────────────────────── */
.error-bar {
  padding: 8px 16px;
  background: rgba(255, 83, 112, 0.1);
  border-top: 1px solid var(--error);
  color: var(--error);
  font-size: 0.78rem;
  line-height: 1.4;
}

.error-bar.hidden {
  display: none;
}

/* ── Tree Output ─────────────────────────── */
#tree-output {
  flex: 1;
  overflow: auto;
  padding: 16px;
  font-size: 0.85rem;
  line-height: 1.6;
  background: var(--bg-input);
}

.tree-node {
  position: relative;
  padding-left: 20px;
}

.tree-line {
  display: flex;
  align-items: flex-start;
  padding: 1px 0;
  border-radius: 3px;
}

.tree-line:hover {
  background: var(--bg-hover);
}

.toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-right: 4px;
  cursor: pointer;
  align-self: center;
  color: var(--text-dim);
  font-size: 0.75rem;
  border-radius: 4px;
  flex-shrink: 0;
  user-select: none;
  transition: color 0.15s, background 0.15s;
}

.toggle-btn:hover {
  color: var(--accent);
  background: var(--bg-hover);
}

.toggle-spacer {
  display: inline-block;
  width: 20px;
  margin-right: 4px;
  flex-shrink: 0;
}

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

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

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

.tree-boolean {
  color: var(--bool-color);
}

.tree-null {
  color: var(--null-color);
  font-style: italic;
}

.tree-bracket {
  color: var(--bracket-color);
}

.tree-comma {
  color: var(--bracket-color);
}

.tree-children {
  overflow: hidden;
  transition: none;
}

.tree-children.collapsed {
  display: none;
}

.tree-summary {
  color: var(--text-dim);
  font-size: 0.8em;
  margin-left: 4px;
  align-self: center;
}

/* ── Search Bar ──────────────────────────── */
.search-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
}

.search-bar.hidden {
  display: none;
}

.search-bar input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text);
  outline: none;
  width: 180px;
  text-transform: none;
  letter-spacing: normal;
}

.search-bar input:focus {
  border-color: var(--accent);
}

.search-count {
  font-size: 0.65rem;
  color: var(--text-dim);
  min-width: 40px;
  text-align: center;
  text-transform: none;
  letter-spacing: normal;
}

.search-nav {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  cursor: pointer;
  padding: 2px 6px;
  font-size: 0.7rem;
  line-height: 1;
  transition: all 0.15s;
}

.search-nav:hover {
  border-color: var(--accent);
  color: var(--accent);
}

#search-go {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 600;
  font-family: var(--font-mono);
  padding: 2px 10px;
}

#search-go:hover {
  opacity: 0.85;
}

/* Search highlight */
.search-highlight {
  background: rgba(255, 213, 79, 0.3);
  border-radius: 2px;
  outline: 1px solid rgba(255, 213, 79, 0.5);
}

.search-highlight.active {
  background: rgba(255, 213, 79, 0.6);
  outline: 2px solid #ffd54f;
}

/* ── Placeholder ──────────────────────────── */
.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
  padding: 24px;
  line-height: 1.8;
}

/* ── Copy Toast ──────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--accent);
  color: var(--bg);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.2s;
  pointer-events: none;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ── Save Dialog ─────────────────────────── */
.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.dialog-overlay.hidden {
  display: none;
}

.dialog {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 360px;
  max-width: 90vw;
}

.dialog-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

.dialog input[type="text"] {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}

.dialog input[type="text"]:focus {
  border-color: var(--accent);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

.dialog-actions button {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}

.dialog-actions button:hover {
  border-color: var(--accent);
}

.dialog-actions button.primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 600;
}

.dialog-actions button.primary:hover {
  opacity: 0.85;
}

/* ── Saved Items Panel ───────────────────── */
.saved-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  height: 100vh;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  z-index: 150;
  display: flex;
  flex-direction: column;
  transform: translateX(0);
  transition: transform 0.2s ease;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.2);
}

.saved-panel.hidden {
  transform: translateX(100%);
  pointer-events: none;
}

.saved-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 600;
}

.saved-panel-header button {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 4px;
}

.saved-panel-header button:hover {
  color: var(--text);
}

.saved-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.saved-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
  gap: 8px;
}

.saved-item:hover {
  background: var(--bg-hover);
}

.saved-item-info {
  flex: 1;
  min-width: 0;
}

.saved-item-name {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.saved-item-date {
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.saved-item-preview {
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.saved-item-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.saved-item-load {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 6px 14px;
  border-radius: 6px;
  transition: all 0.15s;
  white-space: nowrap;
}

.saved-item-load:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.saved-item-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  flex-shrink: 0;
  transition: all 0.15s;
}

.saved-item-delete:hover {
  color: var(--error);
  background: rgba(255, 83, 112, 0.1);
}

.saved-item-name {
  cursor: pointer;
}

.saved-item-name:hover {
  color: var(--accent);
}

.saved-item-rename {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text);
  outline: none;
}

.saved-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 120px;
  color: var(--text-dim);
  font-size: 0.8rem;
}

#saved-count {
  font-size: 0.65rem;
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 768px) {
  main {
    flex-direction: column;
    height: auto;
    min-height: calc(100vh - 95px);
  }

  .panel {
    min-height: 40vh;
  }

  .input-panel {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .toolbar {
    padding: 8px 12px;
  }
}

/* ── Scrollbar ────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
}