* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: #f1f5f9;
  color: #1f2937;
}

.topbar {
  background: #1e293b;
  color: #fff;
  padding: 12px 24px;
}
.topbar h1 { margin: 0; font-size: 20px; }

main { max-width: 1400px; margin: 0 auto; padding: 24px; }

.card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
}
.card.narrow { max-width: 360px; margin: 80px auto; display: flex; flex-direction: column; gap: 12px; }

.btn {
  font: inherit;
  padding: 8px 14px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  background: #fff;
  color: #1f2937;
  cursor: pointer;
}
.btn:hover { background: #f8fafc; }
.btn.primary { background: #2563eb; border-color: #2563eb; color: #fff; }
.btn.primary:hover { background: #1d4ed8; }
.btn.danger { color: #b91c1c; border-color: #fca5a5; }
.btn.link { border: none; background: none; color: #2563eb; padding: 4px 0; text-align: left; }
.btn.icon { padding: 4px 10px; line-height: 1; }

.input {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  width: 100%;
}
.label { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: #64748b; margin: 12px 0 4px; }
.error { color: #b91c1c; }
.muted { color: #64748b; font-size: 14px; }

.list-header { display: flex; justify-content: space-between; align-items: center; }
.timeline-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.timeline-item { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.timeline-item-info { display: flex; flex-direction: column; }
.timeline-item-actions { display: flex; gap: 8px; }

.editor-grid { display: grid; grid-template-columns: 380px 1fr; gap: 20px; align-items: start; }
.editor-form { display: flex; flex-direction: column; gap: 10px; }
.milestone-row { display: flex; gap: 8px; margin-bottom: 8px; }
.milestone-row .m-date { flex: 0 0 140px; }
.save-row { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; }

.editor-preview #preview svg { width: 100%; height: auto; display: block; }
.export-row { display: flex; gap: 10px; margin-top: 12px; }

@media (max-width: 900px) {
  .editor-grid { grid-template-columns: 1fr; }
}