:root {
  color-scheme: light;
  --ink-900: #121316;
  --ink-700: #2f3240;
  --ink-500: #545a6a;
  --ink-300: #9da3b1;
  --canvas: #f7f4ef;
  --panel: #ffffff;
  --accent: #f97316;
  --accent-2: #1f8a70;
  --accent-3: #d946ef;
  --ring: rgba(18, 19, 22, 0.2);
  --shadow: 0 25px 60px rgba(18, 19, 22, 0.16);
  --mono: "JetBrains Mono", "Courier New", monospace;
  --display: "Space Grotesk", "Trebuchet MS", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #fff2da 0%, #f7f4ef 55%, #e9e6e1 100%);
  color: var(--ink-900);
  font-family: var(--display);
}

.backdrop {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.orb {
  position: absolute;
  filter: blur(0px);
  border-radius: 999px;
  opacity: 0.55;
  animation: float 18s ease-in-out infinite;
}

.orb-a {
  width: 420px;
  height: 420px;
  top: -80px;
  right: -120px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.45), transparent 70%);
}

.orb-b {
  width: 360px;
  height: 360px;
  left: -120px;
  bottom: 120px;
  background: radial-gradient(circle, rgba(31, 138, 112, 0.4), transparent 70%);
  animation-delay: -6s;
}

.orb-c {
  width: 260px;
  height: 260px;
  right: 20%;
  bottom: -120px;
  background: radial-gradient(circle, rgba(217, 70, 239, 0.35), transparent 70%);
  animation-delay: -12s;
}

@keyframes float {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, 20px, 0);
  }
}

.app {
  position: relative;
  z-index: 1;
  padding: 48px clamp(16px, 4vw, 64px) 64px;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 24px;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.7rem;
  color: var(--ink-500);
  margin: 0 0 12px;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  margin: 0 0 12px;
  line-height: 1.1;
}

.subhead {
  color: var(--ink-500);
  margin: 0;
  max-width: 44ch;
}

.hero-card {
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.9), rgba(255, 242, 218, 0.9));
  border: 1px solid rgba(18, 19, 22, 0.08);
  border-radius: 24px;
  padding: 24px;
  display: grid;
  gap: 16px;
  box-shadow: var(--shadow);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-500);
}

.stat-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-700);
}

.panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
}

.panel {
  background: var(--panel);
  border-radius: 24px;
  border: 1px solid rgba(18, 19, 22, 0.08);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 15px 35px rgba(18, 19, 22, 0.08);
  min-height: 420px;
  animation: pop 0.6s ease;
}

.tree-panel {
  min-height: 70vh;
}

.tree-panel.is-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 10;
  border-radius: 0;
  padding: 24px 32px 32px;
  height: 100vh;
  background: var(--panel);
}

.tree-panel.is-fullscreen .tree-host {
  height: calc(100vh - 200px);
}

@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.panel-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.panel h2 {
  margin: 0 0 4px;
  font-size: 1.35rem;
}

.panel-note {
  margin: 0;
  color: var(--ink-500);
  font-size: 0.9rem;
}

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

button {
  font-family: var(--display);
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:active {
  transform: scale(0.98);
}

button.primary {
  background: var(--ink-900);
  color: #fff;
  box-shadow: 0 12px 24px rgba(18, 19, 22, 0.2);
}

button.ghost {
  background: transparent;
  color: var(--ink-700);
  border: 1px solid rgba(18, 19, 22, 0.15);
}

button.ghost:hover {
  box-shadow: 0 8px 18px rgba(18, 19, 22, 0.08);
}

textarea {
  flex: 1;
  border-radius: 18px;
  border: 1px solid rgba(18, 19, 22, 0.1);
  padding: 16px;
  font-family: var(--mono);
  font-size: 0.85rem;
  min-height: 320px;
  background: #fbfaf7;
  resize: vertical;
}

.input-placeholder {
  flex: 1;
  border-radius: 18px;
  border: 1px dashed rgba(18, 19, 22, 0.15);
  padding: 18px;
  background: #fbfaf7;
  color: var(--ink-500);
  display: flex;
  align-items: center;
}

.input-panel.drag-active .input-placeholder {
  border-color: rgba(249, 115, 22, 0.5);
  background: #fff3e2;
  color: var(--ink-700);
}

textarea:focus,
input:focus {
  outline: 2px solid rgba(249, 115, 22, 0.3);
  border-color: rgba(249, 115, 22, 0.5);
}

.error {
  min-height: 20px;
  color: #dc2626;
  font-size: 0.85rem;
}

.search {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.search-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search input {
  border-radius: 999px;
  border: 1px solid rgba(18, 19, 22, 0.1);
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 0.85rem;
  min-width: 240px;
}

#match-count {
  font-size: 0.75rem;
  color: var(--ink-500);
}

.tree-host {
  flex: 1;
  overflow: auto;
  padding: 12px;
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f7f4ef 100%);
  border: 1px solid rgba(18, 19, 22, 0.06);
}

.tree {
  list-style: none;
  margin: 0;
  padding-left: 16px;
  display: grid;
  gap: 8px;
}

.node {
  position: relative;
}

.node::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 12px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(18, 19, 22, 0.15);
}

.node.hidden {
  display: none;
}

.node details {
  background: #fff;
  border-radius: 14px;
  padding: 8px 12px;
  border: 1px solid rgba(18, 19, 22, 0.08);
}

.node summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-weight: 600;
}

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

.badge {
  font-size: 0.75rem;
  font-family: var(--mono);
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(31, 138, 112, 0.1);
  color: var(--accent-2);
}

.badge.array {
  background: rgba(31, 138, 112, 0.1);
  color: var(--accent-2);
}

.badge.object {
  background: rgba(217, 70, 239, 0.12);
  color: #a21caf;
}

.leaf {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  background: #fff;
  border-radius: 14px;
  padding: 8px 12px;
  border: 1px solid rgba(18, 19, 22, 0.08);
}

.leaf-key {
  font-weight: 600;
}

.leaf-value {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-500);
  background: rgba(18, 19, 22, 0.04);
  padding: 4px 8px;
  border-radius: 8px;
}

.highlight {
  background: rgba(249, 115, 22, 0.12);
  border-radius: 12px;
  padding: 4px 8px;
}

.empty {
  text-align: center;
  color: var(--ink-500);
  padding: 40px 12px;
  font-size: 0.95rem;
}

.footer {
  font-size: 0.85rem;
  color: var(--ink-500);
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .panels {
    grid-template-columns: 1fr;
  }

  .search {
    align-items: flex-start;
    width: 100%;
  }

  .search-meta {
    width: 100%;
    justify-content: space-between;
  }

  .search input {
    width: 100%;
  }
}