:root {
  color-scheme: light;
  --bg: #f7f5ef;
  --panel: #ffffff;
  --ink: #1d2528;
  --muted: #5d696e;
  --line: #d9d2c5;
  --accent: #0e7c7b;
  --accent-dark: #0a5f60;
  --warn: #a84427;
  --ok: #2c6f43;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

a {
  color: var(--accent-dark);
}

.app {
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  min-height: 100vh;
}

.controls {
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 22px;
  overflow: auto;
}

.workspace {
  padding: 22px;
  overflow: auto;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.nav a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 9px;
  color: var(--muted);
  font-size: 12px;
  text-decoration: none;
}

h1 {
  margin: 0 0 4px;
  font-size: 24px;
  letter-spacing: 0;
}

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

.section {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

label {
  display: block;
  margin-bottom: 6px;
  font-weight: 650;
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 10px 11px;
}

textarea {
  min-height: 150px;
  resize: vertical;
}

.hint,
.status {
  color: var(--muted);
  font-size: 13px;
}

.status {
  min-height: 20px;
  margin-top: 10px;
}

.status.ok {
  color: var(--ok);
}

.status.warn {
  color: var(--warn);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 9px 13px;
  cursor: pointer;
}

button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

button.primary:hover {
  background: var(--accent-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: .55;
}

.preview-head {
  margin-bottom: 14px;
}

.preview-head h2,
.seo-copy h2 {
  margin: 0 0 10px;
  font-size: 20px;
  letter-spacing: 0;
}

.preview {
  min-height: 260px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--line);
  background: #fff;
  padding: 18px;
}

.preview canvas {
  max-width: 100%;
  max-height: 220px;
  image-rendering: pixelated;
}

.payload {
  margin-top: 12px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.seo-copy {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  max-width: 920px;
}

.seo-copy h3 {
  margin: 18px 0 8px;
  font-size: 16px;
  letter-spacing: 0;
}

.seo-copy p,
.seo-copy li {
  color: var(--muted);
}

.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  list-style: none;
}

@media (max-width: 820px) {
  .app {
    grid-template-columns: 1fr;
  }

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

@media print {
  .controls,
  .preview-head,
  .seo-copy {
    display: none;
  }

  body,
  .preview {
    background: #fff;
  }

  .app {
    display: block;
  }

  .workspace {
    padding: 0;
  }

  .preview {
    min-height: auto;
    border: 0;
  }
}