:root {
  --bg: #16161e;
  --panel: #1e1e2e;
  --panel-2: #181825;
  --border: #313244;
  --text: #cdd6f4;
  --muted: #6c7086;
  --accent: #c77dff;
  --accent-2: #a6e3a1;
  --prompt: #a6e3a1;
  --arrow: #89dceb;
  --err: #f38ba8;
  --log: #9399b2;
  --string: #a6e3a1;
  --keyword: #f5c2e7;
}

.theme-light {
  --bg: #f5f3ff;
  --panel: #ffffff;
  --panel-2: #faf8ff;
  --border: #e4dcff;
  --text: #2a1a45;
  --muted: #9385b8;
  --accent: #8b3ffb;
  --accent-2: #2f9e44;
  --prompt: #2f9e44;
  --arrow: #1971c2;
  --err: #d6336c;
  --log: #7a6f96;
  --keyword: #b5179e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

body {
  background: var(--bg);
  color: var(--text);
}

#root { height: 100%; }

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(1200px 600px at 90% -10%, rgba(199,125,255,0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(137,220,235,0.08), transparent 60%),
    var(--bg);
  color: var(--text);
}

/* ---------------- header ---------------- */
.hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
  flex-wrap: wrap;
}
.brand h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  font-family: 'Space Grotesk', sans-serif;
  letter-spacing: -0.5px;
  animation: fadeSlide .5s ease both;
}
.brand .berry { filter: drop-shadow(0 0 8px rgba(199,125,255,.6)); }
.tagline {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  animation: fadeSlide .5s .1s ease both;
}

.hdr-ctrl { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.engine-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
}
.eng-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 8px 12px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all .15s;
  min-height: 36px;
}
.eng-btn.active { background: var(--accent); color: #fff; font-weight: 700; }
.eng-btn:not(.active):hover { color: var(--text); }

.theme-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
  transition: transform .2s;
}
.theme-btn:hover { transform: rotate(20deg); }

/* ---------------- main split ---------------- */
.main {
  flex: 1;
  display: flex;
  gap: 14px;
  padding: 14px;
  min-height: 0;
}
.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  animation: fadeSlide .5s .15s ease both;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
  flex-wrap: wrap;
}
.panel-title { font-weight: 700; font-size: 13px; color: var(--accent); }
.spacer { flex: 1; }

.btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 7px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all .15s;
  min-height: 36px;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.small { padding: 6px 10px; font-size: 11px; min-height: 32px; }
.btn.active { border-color: var(--accent); color: var(--accent); background: rgba(199,125,255,.08); }
.btn.danger:hover { border-color: var(--err); color: var(--err); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 0 16px rgba(199,125,255,.35);
}
.btn.primary:hover { color: #fff; filter: brightness(1.1); }
.btn kbd {
  font-size: 10px;
  background: rgba(0,0,0,.25);
  padding: 1px 5px;
  border-radius: 4px;
  margin-left: 4px;
}

.dropdown { position: relative; }
.menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 20;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 180px;
  padding: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text);
  padding: 9px 10px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
}
.menu button:hover { background: rgba(199,125,255,.12); color: var(--accent); }

/* ---------------- editor ---------------- */
.editor-wrap { flex: 1; display: flex; min-height: 160px; }
.editor {
  flex: 1;
  width: 100%;
  resize: none;
  border: none;
  outline: none;
  background: var(--panel);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.6;
  padding: 16px;
  tab-size: 2;
}
.editor:focus { box-shadow: inset 0 0 0 1px rgba(199,125,255,.4); }
.editor::placeholder { color: var(--muted); }

/* ---------------- ast panel ---------------- */
.ast-panel {
  max-height: 40%;
  overflow: auto;
  border-top: 1px solid var(--border);
  background: var(--panel-2);
  padding: 10px 14px;
}
.ast-head { font-size: 12px; color: var(--accent-2); margin-bottom: 8px; font-weight: 700; }
.ast-tree { font-size: 12px; line-height: 1.5; }
.ast-toggle { cursor: pointer; user-select: none; }
.ast-type { color: var(--accent); font-weight: 700; }
.ast-prop { margin-left: 14px; }
.ast-key { color: var(--arrow); }
.ast-leaf { color: var(--accent-2); }
.muted { color: var(--muted); }

/* ---------------- console ---------------- */
.console {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.55;
  min-height: 140px;
}
.empty { color: var(--muted); font-style: italic; }
.entry {
  position: relative;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
  animation: fadeIn .25s ease both;
}
.in { color: var(--text); white-space: pre-wrap; word-break: break-word; }
.prompt { color: var(--prompt); font-weight: 700; }
.log { color: var(--log); padding-left: 14px; white-space: pre-wrap; word-break: break-word; }
.out { color: var(--arrow); margin-top: 2px; white-space: pre-wrap; word-break: break-word; }
.arrow { color: var(--arrow); font-weight: 700; }
.err { color: var(--err); margin-top: 2px; white-space: pre-wrap; word-break: break-word; }
.engine-tag {
  position: absolute;
  top: 8px;
  right: 0;
  font-size: 9px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: .5;
}
.cursor-line { padding-top: 4px; }
.blink { color: var(--accent); animation: blink 1s steps(2) infinite; }

/* ---------------- scope ---------------- */
.scope { border-top: 1px solid var(--border); background: var(--panel-2); }
.scope-head {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-2);
  user-select: none;
}
.scope-body { padding: 4px 14px 12px; max-height: 130px; overflow-y: auto; font-size: 12px; }
.scope-row { padding: 2px 0; white-space: pre-wrap; word-break: break-word; }
.scope-key { color: var(--keyword); font-weight: 700; }
.scope-arrow { color: var(--muted); }
.scope-val { color: var(--accent-2); }

/* ---------------- footer ---------------- */
.ftr {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--panel-2);
  font-size: 12px;
  color: var(--muted);
}
.ftr .depth { color: var(--accent); }
.ftr .remix {
  margin-left: auto;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  transition: all .15s;
}
.ftr .remix:hover { border-color: var(--accent); background: rgba(199,125,255,.1); }

/* ---------------- toast ---------------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 13px;
  box-shadow: 0 8px 30px rgba(0,0,0,.5), 0 0 20px rgba(199,125,255,.3);
  z-index: 100;
  animation: toastIn .3s ease both;
  max-width: 90vw;
  text-align: center;
}

/* ---------------- animations ---------------- */
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ---------------- responsive / mobile ---------------- */
@media (max-width: 820px) {
  .hdr {
    padding: 12px 14px;
    gap: 10px;
  }
  .brand h1 { font-size: 17px; }
  .hdr-ctrl { width: 100%; justify-content: space-between; }
  .engine-toggle { flex: 1; }
  .eng-btn { flex: 1; text-align: center; }

  .main {
    flex-direction: column;
    padding: 10px;
    gap: 10px;
  }
  .panel { flex: none; }
  .editor-panel { min-height: 300px; }
  .console-panel { min-height: 320px; }
  .editor-wrap { min-height: 180px; }
  .console { min-height: 160px; max-height: 340px; }
  .ast-panel { max-height: 240px; }

  .toolbar { padding: 8px 10px; }
  .btn { padding: 9px 12px; }

  .ftr {
    padding: 12px 14px;
    font-size: 11px;
  }
  .ftr .remix { margin-left: 0; }
}

@media (max-width: 400px) {
  .brand h1 { font-size: 15px; }
  .tagline { font-size: 11px; }
  .eng-btn { font-size: 11px; padding: 8px 6px; }
}