:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --ink: #16202c;
  --muted: #64748b;
  --line: #dde3ea;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --ok: #197a4b;
  --warn: #a8620a;
  --warn-soft: #fdf3e3;
  --danger: #b3261e;
  --radius: 10px;
  --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 4px 16px rgb(16 24 40 / 6%);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.5 "Segoe UI", system-ui, -apple-system, sans-serif;
}

h2 {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ------------------------------------------------------------------ topbar */

.topbar {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 20px;
  height: 56px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.brand { font-weight: 700; display: flex; align-items: center; gap: 9px; }
.brand em { font-style: normal; font-weight: 400; color: var(--muted); font-size: 12px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }

.tabs { display: flex; gap: 4px; }

.tab {
  border: 0;
  background: none;
  padding: 8px 14px;
  border-radius: 7px;
  font: inherit;
  color: var(--muted);
  cursor: pointer;
}
.tab.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.tab:disabled { opacity: 0.45; cursor: not-allowed; }

/* ------------------------------------------------------------------ layout */

.layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 260px;
  gap: 16px;
  padding: 16px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

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

/* ------------------------------------------------------------------ fields */

.field { display: block; margin-bottom: 12px; }
.field > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.field > span small { font-weight: 400; opacity: 0.75; }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font: inherit;
  background: #fff;
  color: inherit;
}
.field input[type="color"] { padding: 2px; height: 32px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.field-row { display: flex; gap: 10px; }
.field-row .field { flex: 1; }
.field--narrow { flex: 0 0 74px; }

.actions { display: flex; gap: 8px; margin-top: 16px; }

.btn {
  padding: 8px 13px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 7px;
  font: inherit;
  cursor: pointer;
}
.btn:hover { border-color: #b9c3cf; }
.btn--primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn--primary:hover { background: #1a5fd0; }
.btn--icon { padding: 3px 7px; line-height: 1; font-size: 13px; }

.status {
  margin-top: 12px;
  padding: 10px 11px;
  border-radius: 8px;
  font-size: 12.5px;
  background: #eef7f1;
  border: 1px solid #cbe6d7;
  color: var(--ok);
  white-space: pre-wrap;
}
.status.is-warn { background: var(--warn-soft); border-color: #f0dcb8; color: var(--warn); }
.status.is-error { background: #fdeeed; border-color: #f3cdc9; color: var(--danger); }

.spec { margin-top: 14px; font-size: 12px; color: var(--muted); }
.spec pre {
  max-height: 260px;
  overflow: auto;
  background: #0f172a;
  color: #cbd5e1;
  padding: 10px;
  border-radius: 8px;
  font-size: 11px;
  line-height: 1.45;
}

/* ------------------------------------------------------------------ canvas */

.canvas-head { display: flex; align-items: baseline; justify-content: space-between; }
.hint { font-size: 12px; color: var(--muted); }

.canvas { list-style: none; margin: 0; padding: 0; min-height: 120px; }

.canvas.is-dragover { outline: 2px dashed var(--accent); outline-offset: 4px; border-radius: var(--radius); }

.empty {
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  padding: 34px;
  text-align: center;
  color: var(--muted);
  margin: 0;
}

.block {
  border: 1px solid var(--line);
  border-radius: 9px;
  margin-bottom: 10px;
  background: #fff;
  transition: box-shadow 0.12s, transform 0.12s;
}
.block.is-dragging { opacity: 0.4; }
.block.is-over { box-shadow: 0 -3px 0 var(--accent); }

.block-head {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 11px;
}

.grip { cursor: grab; color: #9aa7b5; user-select: none; letter-spacing: -2px; }
.block-title { font-weight: 600; }
.block-kind {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 20px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}
.block-kind[data-group="static"] { background: #eef2f6; color: #475569; }
.block-kind[data-group="word"] { background: #f3ecfb; color: #6d3fa8; }
.block-head .spacer { flex: 1; }

.block-body { padding: 0 11px 11px 32px; display: grid; gap: 9px; }
.block-body .field { margin: 0; }
.block-body .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  background: #eef2f6;
  border-radius: 20px;
  padding: 3px 9px;
  font-size: 12px;
  display: inline-flex;
  gap: 6px;
  align-items: center;
}
.chip button { border: 0; background: none; cursor: pointer; color: var(--muted); padding: 0; font-size: 13px; }

/* ----------------------------------------------------------------- palette */

.palette-group { margin-bottom: 16px; }
.palette-group h3 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 7px;
}

.palette-item {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 9px 11px;
  margin-bottom: 7px;
  cursor: grab;
  font: inherit;
}
.palette-item:hover { border-color: var(--accent); background: var(--accent-soft); }
.palette-item small { display: block; color: var(--muted); font-size: 11.5px; }

/* ------------------------------------------------------------------ picker */

.picker {
  border: 0;
  border-radius: 12px;
  padding: 0;
  width: min(560px, 92vw);
  box-shadow: 0 20px 50px rgb(16 24 40 / 25%);
}
.picker::backdrop { background: rgb(15 23 42 / 45%); }
.picker header { padding: 16px 16px 10px; border-bottom: 1px solid var(--line); }
.picker h3 { margin: 0 0 10px; font-size: 15px; }
.picker input[type="search"] {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font: inherit;
}
.picker footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
}
.picker footer .spacer { flex: 1; }
.muted { color: var(--muted); font-size: 12px; }

.picker-list { list-style: none; margin: 0; padding: 8px; max-height: 46vh; overflow: auto; }
.picker-list li { border-radius: 7px; }
.picker-list label { display: flex; gap: 10px; align-items: flex-start; padding: 8px 9px; cursor: pointer; }
.picker-list label:hover { background: #f6f8fb; }
.picker-list small { display: block; color: var(--muted); }

@media (max-width: 1080px) {
  .layout { grid-template-columns: 1fr; }
}