:root {
  --bg: #232323;
  --header: #2f2f2f;
  --text: #ffffff;
  --muted: #d1d1d1;
  --primary: #82b440;
  --primary-dark: #6f9f35;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  height: 100%;
}

.preview__header {
  height: 56px;
  background: var(--header);
  border-bottom: 1px solid #000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.preview__brand {
  display: flex;
  align-items: center;
}

.header-brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.08rem;
}

.preview__actions {
  display: flex;
  gap: 10px;
}

.btn {
  text-decoration: none;
  border-radius: 4px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 700;
}

.btn-secondary {
  color: var(--text);
  background: #3f3f3f;
}

.btn-primary {
  color: #fff;
  background: var(--primary);
}

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

.full-screen-preview__frame {
  width: 100%;
  height: calc(100vh - 56px);
  display: block;
  border: 0;
  background: #fff;
}

@media (max-width: 600px) {
  .preview__header {
    height: auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 10px;
  }
}