:root {
  --bg: #edf0f5;
  --panel: #ffffff;
  --ink: #0f1a2e;
  --muted: #5b6679;
  --line: #d3d9e3;
  --accent: #1f4fd8;
  --accent-soft: #e6ecfd;
  --warn-bg: #fff1e0;
  --warn-ink: #8a4b00;
  --bad: #b42318;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 var(--sans); }
.top, main { max-width: 880px; margin: 0 auto; padding: 0 14px; }
.top { padding-top: 22px; padding-bottom: 14px; }
h1 { margin: 0 0 4px; font-size: 1.6rem; letter-spacing: -0.02em; }
h2 { margin: 0 0 6px; font-size: 1.15rem; }
.top p { margin: 0; color: var(--muted); max-width: 60ch; }
main { padding-bottom: 40px; display: grid; gap: 14px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 14px; min-width: 0; }
.muted { color: var(--muted); margin: 0 0 8px; font-size: 0.92rem; }

button, .btn, select, input, textarea { font: inherit; color: inherit; }
button, .btn {
  display: inline-block; padding: 9px 14px; border: 1px solid var(--line); border-radius: 6px;
  background: #fff; cursor: pointer; text-decoration: none; line-height: 1.2; min-height: 40px;
}
button:hover, .btn:hover { border-color: var(--accent); }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.primary:hover, .btn.primary:hover { background: #1a43b8; }
button.ghost { border-color: transparent; color: var(--muted); }
button.link { border: 0; background: none; padding: 4px 6px; min-height: 0; color: var(--accent); }
button:disabled { opacity: 0.55; cursor: default; }
:focus-visible { outline: 3px solid #86a2f5; outline-offset: 1px; }

/* вкладки-файлы: продолжение рамки редактора */
.tabs { display: flex; gap: 4px; overflow-x: auto; margin-bottom: -1px; position: relative; }
.tab { border-radius: 6px 6px 0 0; border-bottom-color: var(--line); background: #f4f6fa; font-family: var(--mono); font-size: 0.9rem; padding: 8px 12px; white-space: nowrap; min-height: 38px; }
.tab.on { background: #fff; border-top: 3px solid var(--accent); border-bottom-color: #fff; font-weight: 600; }
.tab.add { font-weight: 700; font-family: var(--sans); }
.filebar { display: flex; justify-content: space-between; align-items: center; gap: 8px; border: 1px solid var(--line); border-bottom: 0; padding: 4px 8px; background: #fff; }
.fname { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.filebtns { white-space: nowrap; }
textarea#code {
  display: block; width: 100%; min-height: 320px; height: 46vh; resize: vertical; padding: 10px;
  border: 1px solid var(--line); border-radius: 0 0 6px 6px; font-family: var(--mono); font-size: 0.88rem; line-height: 1.45;
  tab-size: 2; white-space: pre; overflow: auto; background: #fbfcfe;
}
.size { margin: 6px 0 12px; font-size: 0.88rem; color: var(--muted); }
.size.bad { color: var(--bad); font-weight: 600; }

.fields { display: grid; grid-template-columns: 1fr; gap: 10px; }
@media (min-width: 640px) { .fields { grid-template-columns: 2fr 1fr; } }
label { display: grid; gap: 4px; font-size: 0.9rem; color: var(--muted); }
input, select { width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink); min-height: 40px; }
input[readonly] { background: #f4f6fa; font-family: var(--mono); font-size: 0.85rem; }
.note { margin: 12px 0 0; padding: 8px 10px; background: var(--accent-soft); border-radius: 6px; font-size: 0.92rem; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.actions .primary { flex: 1 1 160px; }
#msg { min-height: 1.4em; margin: 10px 0 0; font-size: 0.92rem; }
#msg.bad { color: var(--bad); font-weight: 600; }

.pv-bar { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; justify-content: space-between; margin-bottom: 10px; }
.pv-bar label { min-width: 160px; }
.sizes { display: flex; gap: 4px; }
.sizes button.on { background: var(--accent-soft); border-color: var(--accent); }
.pv-stage { background: repeating-linear-gradient(45deg, #f1f3f7, #f1f3f7 10px, #e9ecf2 10px, #e9ecf2 20px); padding: 10px; border-radius: 6px; overflow-x: auto; }
#frame { display: block; margin: 0 auto; width: 100%; height: 70vh; min-height: 360px; border: 1px solid var(--line); background: #fff; }

.warn { margin: 6px 0 12px; padding: 8px 10px; background: var(--warn-bg); color: var(--warn-ink); border-radius: 6px; font-weight: 600; }
.res-grid { display: grid; gap: 14px; }
@media (min-width: 640px) { .res-grid { grid-template-columns: auto 1fr; } }
.qrbox { display: grid; gap: 8px; justify-items: start; }
#qr { width: 200px; height: 200px; border: 1px solid var(--line); image-rendering: pixelated; }
.res-fields { display: grid; gap: 10px; align-content: start; min-width: 0; }
.res-fields p { margin: 0; }
.copyrow { display: flex; gap: 6px; }
.copyrow button { flex: none; }

.sites { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site { border: 1px solid var(--line); border-radius: 6px; padding: 10px; display: grid; gap: 6px; min-width: 0; }
.site b { overflow-wrap: anywhere; }
.site .addr { font-family: var(--mono); font-size: 0.82rem; color: var(--accent); overflow-wrap: anywhere; }
.site .cd { font-size: 0.9rem; color: var(--muted); }
.site .cd.dead { color: var(--bad); }
.site .btns { display: flex; flex-wrap: wrap; gap: 6px; }
.site .btns .btn, .site .btns button { padding: 7px 10px; min-height: 36px; font-size: 0.92rem; }
.site .ext { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 0.9rem; }
.site .ext[hidden] { display: none; }
.site .ext select { width: auto; min-height: 36px; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }