:root {
  --card: rgba(16, 24, 48, 0.78);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #ebf2ff;
  --muted: #9db0d1;
  --accent: #7c9cff;
  --accent-2: #78e8c8;
  --danger: #ff7a90;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  overflow: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, rgba(124, 156, 255, 0.18), transparent 30%),
              radial-gradient(circle at top right, rgba(120, 232, 200, 0.15), transparent 24%),
              linear-gradient(160deg, #060913 0%, #0b1020 45%, #121933 100%);
  color: var(--text);
}

.bg {
  position: fixed;
  inset: 0;
  backdrop-filter: blur(6px);
  pointer-events: none;
}

.app-shell {
  width: min(1280px, calc(100% - 24px));
  height: calc(100vh - 24px);
  margin: 12px auto;
  position: relative;
  z-index: 1;
}

.card {
  height: 100%;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.viewer {
  min-height: 0;
  padding: 18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.viewer-column {
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
  flex: 0 0 auto;
}

.actions-right {
  justify-content: flex-end;
}

.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

textarea,
.tree-view {
  width: 100%;
  flex: 1 1 auto;
  min-height: 0;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(7, 11, 24, 0.78);
  color: var(--text);
  padding: 18px;
  overflow: auto;
}

textarea {
  resize: none;
  font: 14px/1.7 "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  outline: none;
}

.tree-view {
  font: 14px/1.7 "SFMono-Regular", Consolas, monospace;
}

.status {
  margin-top: 12px;
  font-size: 14px;
  flex: 0 0 auto;
}

.muted { color: var(--muted); }
.success { color: var(--accent-2); }
.error { color: var(--danger); }

button {
  border: none;
  border-radius: 12px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  color: #08111f;
  background: linear-gradient(135deg, #7c9cff, #78e8c8);
  transition: transform .18s ease, opacity .18s ease, box-shadow .18s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(124, 156, 255, 0.25);
}

button.secondary {
  background: rgba(255,255,255,0.1);
  color: var(--text);
}

button.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid rgba(255,255,255,0.12);
}

.tree-view.empty {
  display: grid;
  place-items: center;
  color: var(--muted);
}

.tree-node { padding-left: 18px; }
.tree-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 2px 0;
  word-break: break-word;
}

.toggle {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  display: inline-grid;
  place-items: center;
  border-radius: 6px;
  background: rgba(124, 156, 255, 0.12);
  color: #c9d7ff;
  cursor: pointer;
  user-select: none;
  font-size: 12px;
  margin-top: 2px;
}

.toggle.leaf {
  background: transparent;
  color: rgba(255,255,255,0.22);
  cursor: default;
}

.tree-children.collapsed { display: none; }
.tree-key { color: #8cb4ff; }
.tree-string { color: #7ef0b8; }
.tree-number { color: #ffd580; }
.tree-boolean { color: #ff96b1; }
.tree-null { color: #a89cff; }
.tree-meta { color: var(--muted); }

@media (max-width: 960px) {
  body { overflow: auto; }
  .app-shell {
    height: auto;
    min-height: calc(100vh - 24px);
  }
  .viewer {
    grid-template-columns: 1fr;
    min-height: 900px;
  }
  .actions-right { justify-content: flex-start; }
}


.context-menu {
  position: fixed;
  z-index: 9999;
  min-width: 180px;
  padding: 8px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(10, 15, 30, 0.96);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(16px);
}

.context-menu.hidden {
  display: none;
}

.context-menu-btn {
  width: 100%;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  padding: 10px 12px;
  text-align: left;
  cursor: pointer;
  font: 14px/1.4 "SFMono-Regular", Consolas, monospace;
}

.context-menu-btn:hover {
  background: rgba(124, 156, 255, 0.14);
  box-shadow: none;
  transform: none;
}