:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --warn-bg: #fef3c7;
  --warn-text: #92400e;
  --ok-bg: #dcfce7;
  --ok-text: #166534;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.04);
}

* { box-sizing: border-box; }

/* The HTML `hidden` attribute must always win. The UA default ([hidden]
   { display: none }) loses to ANY author display rule — so e.g. `.status
   { display: flex }` kept the global spinner pill (and its animation)
   permanently on screen even though app.js correctly set `els.status.hidden`.
   Both app.js and simulator.js toggle visibility exclusively via the hidden
   property, so this reset is the load-bearing half of that contract. */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ---- Banner ---- */
.banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  color: #fff;
  font-weight: 600;
}
.banner--dev { background: #334155; }
.banner--prod {
  background: var(--danger);
  font-size: 15px;
  letter-spacing: 0.2px;
}
.banner__left { display: flex; align-items: center; gap: 12px; }
.banner__title { font-weight: 700; }
.banner__env {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.banner--prod .banner__env { background: rgba(0, 0, 0, 0.2); }
.banner__right { display: flex; align-items: center; gap: 12px; }
.banner__user { font-weight: 500; }

/* ---- Layout ---- */
/* Wide enough for the IDE frame (#1015); the login card (.card--narrow) and
   the generator cards constrain their own widths. */
.wrap {
  max-width: 1280px;
  margin: 24px auto 80px;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.card--narrow { max-width: 420px; margin: 40px auto 0; }
.card--danger { border-color: #f3c2c2; }
.card--danger .card__title { color: var(--danger); }
.card__title { margin: 0 0 6px; font-size: 17px; }

.muted { color: var(--muted); margin: 0 0 14px; font-size: 13px; }

/* ---- Forms ---- */
.form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.field > span { font-weight: 600; font-size: 13px; }
.field--confirm { margin-top: 12px; }

input, select {
  font: inherit;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
}
input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
select[multiple] { padding: 4px; }

.grid { display: grid; gap: 14px; }
.grid--2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .grid--2 { grid-template-columns: 1fr; } }

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin: 6px 0 0;
}
legend { font-weight: 600; font-size: 13px; padding: 0 6px; }

.period__presets { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.radios { display: flex; gap: 6px; flex-wrap: wrap; }
.radios label { display: inline-flex; align-items: center; gap: 6px; margin-right: 14px; font-weight: 500; }
.radios input { padding: 0; }

/* ---- Buttons ---- */
.btn {
  font: inherit;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, opacity 0.12s ease;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:not(:disabled):hover { background: var(--primary-hover); }
.btn--secondary { background: #eef2ff; color: var(--primary); border-color: #dbe3ff; }
.btn--secondary:not(:disabled):hover { background: #e2e8ff; }
.btn--danger { background: var(--danger); color: #fff; }
.btn--danger:not(:disabled):hover { background: var(--danger-hover); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.4); }
.btn--ghost:hover { background: rgba(255, 255, 255, 0.12); }
.btn--sm { padding: 5px 10px; font-size: 12px; }
.btn--chip {
  background: #f1f3f7; color: var(--text); border-color: var(--border);
  padding: 6px 12px; font-weight: 500; font-size: 13px;
}
.btn--chip:hover { background: #e7eaf0; }

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

/* ---- Results ---- */
.result {
  margin-top: 14px;
  padding: 14px;
  border-radius: 8px;
  background: #f8fafc;
  border: 1px solid var(--border);
  font-size: 13px;
}
.result h3 { margin: 0 0 8px; font-size: 14px; }
.result__summary { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 10px; }
.result__summary b { font-size: 18px; display: block; }
.result__summary span { color: var(--muted); font-size: 12px; }

.notice { padding: 10px 12px; border-radius: 8px; margin: 10px 0; font-weight: 500; }
.notice--warn { background: var(--warn-bg); color: var(--warn-text); }
.notice--ok { background: var(--ok-bg); color: var(--ok-text); }
.notice--err { background: #fee2e2; color: var(--danger-hover); }

.error { color: var(--danger); font-weight: 500; margin: 0; }

table.preview {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 13px;
}
table.preview th, table.preview td {
  text-align: left;
  padding: 5px 8px;
  border-bottom: 1px solid var(--border);
}
table.preview th { color: var(--muted); font-weight: 600; }
.preview-scroll { max-height: 220px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; }

.errors-list { margin: 8px 0 0; padding-left: 18px; color: var(--danger-hover); }
.errors-list li { margin-bottom: 3px; }

/* ---- Global status / spinner ---- */
.status {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: #1f2430;
  color: #fff;
  padding: 9px 16px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow);
  font-size: 13px;
  z-index: 50;
}
.spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }