:root {
  --bg: #efe7d8;
  --panel: #f8f4ec;
  --ink: #1f2430;
  --muted: #6d6f73;
  --accent: #c95b2b;
  --line: #d9ccb8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, #fff8ea 0, transparent 28%),
    linear-gradient(135deg, #efe7d8 0%, #e3d3ba 100%);
}

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  min-height: 100vh;
}

.controls {
  padding: 24px;
  border-right: 1px solid var(--line);
  background: rgba(248, 244, 236, 0.92);
  backdrop-filter: blur(8px);
}

.controls h1,
.debug h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.muted {
  margin: 0 0 20px;
  color: var(--muted);
}

form,
fieldset {
  display: grid;
  gap: 14px;
}

fieldset {
  padding: 14px;
  border: 1px solid var(--line);
  background: #fffdf8;
}

label {
  display: grid;
  gap: 6px;
}

label span,
legend,
dt {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: white;
}

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

button {
  padding: 11px 14px;
  border: 1px solid var(--ink);
  background: var(--accent);
  color: white;
  cursor: pointer;
}

#reload-iframe {
  background: transparent;
  color: var(--ink);
}

.debug {
  margin-top: 24px;
}

.debug dl {
  display: grid;
  gap: 6px;
  margin: 0 0 12px;
}

.debug dd {
  margin: 0 0 10px;
  font-size: 14px;
  word-break: break-word;
}

#debug-log {
  min-height: 180px;
  padding: 12px;
  overflow: auto;
  border: 1px solid var(--line);
  background: #1f2430;
  color: #d9efe2;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
}

.frame-panel {
  padding: 18px;
}

#app-frame {
  width: 100%;
  min-height: calc(100vh - 36px);
  border: 1px solid var(--line);
  background: white;
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .controls {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  #app-frame {
    min-height: 70vh;
  }
}