:root {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #667085;
  --line: #d9dee7;
  --primary: #2454d6;
  --primary-dark: #183a9e;
  --accent: #d64b35;
  --shadow: 0 18px 50px rgba(31, 41, 55, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, Arial, sans-serif;
}

.shell {
  min-height: 100vh;
  padding: 28px;
}

.workspace {
  max-width: 1240px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 22px;
}

.eyebrow {
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0;
  margin: 0 0 6px;
}

h1, h2 {
  letter-spacing: 0;
  margin: 0;
}

h1 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
}

h2 {
  font-size: 18px;
}

.status {
  min-width: 120px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  text-align: center;
  background: #fff;
}

.builder {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 18px;
  align-items: start;
}

.panel, .results, .preview-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-bottom: 18px;
}

.panel-head span {
  color: var(--muted);
  font-size: 13px;
}

label {
  display: grid;
  gap: 7px;
  color: #344054;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
}

input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font: inherit;
  padding: 11px 12px;
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(36, 84, 214, 0.14);
}

textarea {
  min-height: 340px;
  resize: vertical;
  font-family: Consolas, "Courier New", monospace;
  line-height: 1.45;
}

.compact textarea {
  min-height: 118px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.checkline {
  grid-template-columns: 18px 1fr;
  align-items: center;
  font-weight: 600;
}

.checkline input {
  width: 18px;
  height: 18px;
}

.field-help {
  margin: -6px 0 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.field-help code {
  color: var(--text);
  background: #eef2ff;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 4px;
}

.primary {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
}

.primary:hover { background: var(--primary-dark); }
.primary:disabled { cursor: wait; opacity: 0.68; }

.results {
  margin-top: 18px;
}

.preview-panel {
  margin-top: 18px;
}

.preview-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.approve {
  min-height: 40px;
  border: 0;
  border-radius: 6px;
  padding: 9px 14px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

.approve:disabled {
  opacity: 0.65;
  cursor: wait;
}

.preview-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 14px;
  min-height: 620px;
}

.preview-list {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfcff;
  padding: 10px;
  overflow: auto;
}

.preview-page {
  display: block;
  width: 100%;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 8px;
  padding: 10px;
  text-align: left;
  overflow-wrap: anywhere;
}

.preview-page:hover,
.preview-page.active {
  border-color: color-mix(in srgb, var(--primary) 35%, var(--line));
  background: color-mix(in srgb, var(--primary) 8%, white);
  color: var(--primary-dark);
}

.preview-frame {
  width: 100%;
  height: 620px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.downloads a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 800;
  background: #fff;
}

pre {
  max-height: 320px;
  overflow: auto;
  margin: 0;
  border-radius: 6px;
  background: #101828;
  color: #ecf2ff;
  padding: 14px;
  white-space: pre-wrap;
}

@media (max-width: 900px) {
  .shell { padding: 18px; }
  .topbar, .builder, .grid-2, .preview-layout { grid-template-columns: 1fr; display: grid; }
  .status { text-align: left; }
  .preview-layout { min-height: auto; }
  .preview-frame { height: 520px; }
}

/* === Вкладки Preview / Code Editor === */
.editor-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 0;
  border-bottom: 2px solid #2a3142;
}
.tab-btn {
  background: transparent;
  color: #9ca3af;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 10px 20px;
  font-size: 0.95em;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.tab-btn:hover { color: #e6e6e6; }
.tab-btn.active { color: #60a5fa; border-bottom-color: #60a5fa; }
.tab-content { display: none; }
.tab-content.active { display: grid; }

/* === Code Editor Layout === */
.editor-layout {
  grid-template-columns: 220px 1fr;
  gap: 0;
  min-height: 600px;
  background: #0f1419;
  border: 1px solid #2a3142;
  border-top: 0;
}
.editor-main {
  display: flex;
  flex-direction: column;
  border-left: 1px solid #2a3142;
}
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: #1a1f2e;
  border-bottom: 1px solid #2a3142;
  font-size: 0.85em;
  color: #9ca3af;
}
#editorPageTitle { flex: 1; font-weight: 600; color: #e6e6e6; }
.save-status { font-size: 0.8em; color: #6b7280; }
.save-status.saved { color: #34d399; }
.save-status.dirty { color: #fbbf24; }
.save-btn {
  background: #058d28;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 6px 16px;
  font-size: 0.85em;
  cursor: pointer;
  transition: background 0.2s;
}
.save-btn:hover:not(:disabled) { background: #047621; }
.save-btn:disabled { background: #374151; cursor: not-allowed; }

.editor-area {
  flex: 1;
  overflow: hidden;
  position: relative;
}
#codeEditor {
  display: none; /* скрываем textarea, CodeMirror займёт место */
}

/* CodeMirror во всю высоту */
.CodeMirror {
  height: 560px !important;
  font-family: "Cascadia Code", "Fira Code", "Consolas", monospace;
  font-size: 13px;
  line-height: 1.5;
}

/* список страниц в редакторе */
#editorPageList .preview-page { font-size: 0.8em; }