:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f6f7f9;
  color: #1f2937;
}

* { box-sizing: border-box; }
body { margin: 0; }
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 32px;
  background: white;
  border-bottom: 1px solid #e5e7eb;
}
header h1 { margin: 0 0 4px; font-size: 26px; }
header p { margin: 0; color: #6b7280; }
.header-actions { display: flex; align-items: center; gap: 12px; }
main { padding: 28px 32px 48px; max-width: 1400px; margin: 0 auto; }
.auth-content { max-width: 480px; }
.auth-card { background: white; border: 1px solid #e5e7eb; border-radius: 14px; box-shadow: 0 4px 16px rgba(0,0,0,.04); padding: 28px; }
.auth-card h2 { margin-top: 0; }
.auth-card p { color: #4b5563; line-height: 1.55; }
.subscribe-card, .calendar-card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  box-shadow: 0 4px 16px rgba(0,0,0,.04);
}
.subscribe-card {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 20px 22px;
  margin-bottom: 24px;
}
.subscribe-card h2 { margin: 0 0 6px; font-size: 18px; }
.subscribe-card p { margin: 0 0 12px; color: #6b7280; }
.subscribe-card code { display: inline-block; max-width: 760px; overflow-wrap: anywhere; }
.subscribe-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.calendar-card { padding: 22px; }
button, .button-link {
  border: 1px solid #d1d5db;
  background: white;
  color: #111827;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
button:hover, .button-link:hover { filter: brightness(.97); }
.primary { background: #2563eb; border-color: #2563eb; color: white; }
.danger { background: #b91c1c; border-color: #b91c1c; color: white; }
.hidden { display: none !important; }
dialog {
  width: min(620px, calc(100vw - 28px));
  border: 0;
  border-radius: 14px;
  padding: 0;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
dialog::backdrop { background: rgba(15,23,42,.45); }
form { padding: 22px; }
.dialog-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.dialog-header h2 { margin: 0; }
.icon-btn { border: 0; font-size: 25px; padding: 2px 8px; }
label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 14px; }
input, textarea {
  width: 100%;
  margin-top: 6px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  padding: 10px 11px;
  font: inherit;
  font-weight: 400;
}
textarea { resize: vertical; }
.checkbox-row { display: flex; align-items: center; gap: 9px; }
.checkbox-row input { width: auto; margin: 0; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.dialog-actions { display: flex; gap: 10px; align-items: center; margin-top: 6px; }
.spacer { flex: 1; }
.error { min-height: 20px; color: #b91c1c; margin: 5px 0 10px; font-size: 13px; }
.fc .fc-button { border-radius: 7px; }
@media (max-width: 760px) {
  header, .subscribe-card { align-items: stretch; flex-direction: column; }
  .header-actions { justify-content: space-between; }
  main { padding: 18px 14px 36px; }
  header { padding: 20px 16px; }
  .two-col { grid-template-columns: 1fr; }
  .calendar-card { padding: 10px; }
}