body:has(.simple-calculator) { background: #f5f7fa; }
.simple-calculator {
  --ink: #142e4c;
  --muted: #536b85;
  --accent: #315f86;
  --rule: #ccdbea;
  --result: #edf3f8;
  width: calc(100% - 48px);
  max-width: 1080px;
  margin: 0 auto;
  color: var(--ink);
}
.simple-calculator header,
.simple-calculator main,
.simple-calculator footer { max-width: none; margin: 0; }
.simple-calculator header { min-height: 94px; height: auto; padding: 18px 0; border-color: var(--rule); }
.simple-calculator .brand { color: var(--ink); }
.simple-calculator .brand-copy strong { font-size: 28px; }
.simple-calculator .brand-copy small { font-size: 15px; color: var(--muted); }
.simple-calculator .mark { background: var(--accent); color: white; width: 44px; height: 44px; flex-basis: 44px; border-radius: 10px; }
.simple-calculator .law { color: var(--ink); border-color: #b7cce0; background: transparent; }
.simple-calculator .intro { padding: 28px 0 24px; }
.simple-calculator h1 { font: 700 clamp(32px, 4.3vw, 54px)/1.15 Georgia, serif; letter-spacing: -1.5px; margin: 0 0 12px; }
.simple-calculator h1 em { color: inherit; }
.simple-calculator .intro > p { color: var(--muted); font-size: 18px; margin: 0; line-height: 1.5; }
.simple-calculator .workspace { grid-template-columns: minmax(0, 1fr); gap: 18px; align-items: start; }
.simple-calculator .input-card,
.simple-calculator .result { padding: 24px; min-width: 0; border-radius: 10px; }
.simple-calculator .input-card { background: white; border: 1px solid var(--rule); }
.simple-calculator #form { display: grid; grid-template-columns: minmax(0, 1.36fr) minmax(250px, 1fr); gap: 8px 20px; align-items: start; }
.simple-calculator label[for="start"] { grid-column: 1 / -1; grid-row: 1; margin: 0 0 2px; font-size: 17px; }
.simple-calculator #start { grid-column: 1; grid-row: 2; height: 60px; min-height: 60px; line-height: 1.2; font-size: 24px; background: white; color: var(--ink); border-color: #bdccdc; }
.simple-calculator .primary { grid-column: 2; grid-row: 2; margin: 0; min-height: 60px; padding: 15px 24px; background: var(--accent); font-size: 17px; border-radius: 8px; }
.simple-calculator .primary:hover { background: #254e71; }
.simple-calculator .date-help { grid-column: 1 / -1; grid-row: 3; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.simple-calculator .text-button { grid-column: 1; grid-row: 4; display: inline-flex; align-items: center; gap: 9px; justify-self: start; padding: 5px 0 0; color: #245b89; font-size: 14px; }
.simple-calculator .settings { grid-column: 2; grid-row: 4; margin: 0; padding: 5px 0 0 20px; border-left: 1px solid var(--rule); color: var(--muted); font-size: 13px; }
.simple-calculator .settings summary { color: var(--muted); line-height: 1.6; }
.simple-calculator .settings label { margin-top: 16px; }
.simple-calculator .settings textarea { background: white; color: var(--ink); border-color: #bdccdc; }
.simple-calculator #error { grid-column: 1 / -1; grid-row: 5; margin: 0; }
.simple-calculator #error:empty { display: none; }
.simple-calculator .result { display: block; border: 1px solid transparent; background: var(--result); }
.simple-calculator #empty { padding: 8px 0; }
.simple-calculator .empty-date { display: block; font: 42px/1 Georgia, serif; color: #8ba3ba; margin-bottom: 14px; }
.simple-calculator #empty h2 { font: 26px/1.2 Georgia, serif; margin: 0 0 12px; }
.simple-calculator #empty > p { font-size: 14px; color: var(--muted); margin: 0; }
.simple-calculator .duration { color: var(--muted); font-size: 13px; margin: 0 0 20px; }
.simple-calculator .deadline-stages { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; }
.simple-calculator .deadline-stage { min-width: 0; }
.simple-calculator .deadline-stage + .deadline-stage { border-top: none; border-left: 1px solid var(--rule); padding: 0 0 0 28px; }
.simple-calculator .stage-heading { display: flex; flex-wrap: wrap; align-items: baseline; gap: 5px 12px; }
.simple-calculator .stage-heading h2 { font-size: 19px; font-weight: 700; margin: 0; }
.simple-calculator .stage-kind { color: var(--muted); font-size: 13px; }
.simple-calculator .deadline-purpose { color: var(--muted); font-size: 14px; line-height: 1.6; margin: 7px 0 10px; }
.simple-calculator .big-date { color: var(--ink); font: 700 clamp(38px, 5.4vw, 72px)/1.15 Georgia, serif; letter-spacing: -1px; margin: 0; font-variant-numeric: tabular-nums; }
.simple-calculator .result-scope { color: var(--muted); font-size: 14px; line-height: 1.6; margin: 12px 0 0; }
.simple-calculator .start-warning:empty { display: none; }
.simple-calculator .start-warning:not(:empty) { color: var(--muted); margin-top: 18px; }
.simple-calculator .print-button { display: inline-flex; align-items: center; gap: 9px; min-height: 42px; margin-top: 24px; padding: 9px 14px; border: 1px solid #a8c0d8; border-radius: 8px; background: transparent; color: #245b89; font-size: 14px; }
.simple-calculator .print-button:hover { background: #e1ebf4; }
.simple-calculator .calculator-note { max-width: none; color: var(--muted); font-size: 12px; line-height: 1.6; margin: 16px 0 18px; }
.simple-calculator .breakdown { padding: 18px 24px; border-color: var(--rule); border-radius: 10px; background: white; margin-bottom: 18px; }
.simple-calculator .breakdown summary { color: var(--ink); font-size: 15px; font-weight: 700; }
.simple-calculator .small,
.simple-calculator .explanation p { color: var(--muted); }
.simple-calculator .calculator-help { padding: 17px 0 22px; border-top: 1px solid var(--rule); font-size: 13px; }
.simple-calculator .calculator-help > summary { color: var(--muted); }
.simple-calculator .calculation-detail:not(:empty) { margin: 20px 0 0; }
.simple-calculator .explanation { padding: 26px 0 18px; gap: 24px; }
.simple-calculator .explanation h2 { font-size: 25px; }
.simple-calculator .legal { padding-bottom: 0; color: var(--muted); border-color: var(--rule); }
.simple-calculator .legal a { color: #245b89; }
.simple-calculator th { background: #e8eff6; }
.simple-calculator th,
.simple-calculator td { border-color: var(--rule); }
.simple-calculator footer { justify-content: flex-end; margin-top: 4px; padding: 20px 0 26px; color: var(--muted); border-color: var(--rule); }
.simple-calculator button:focus-visible,
.simple-calculator summary:focus-visible,
.simple-calculator a:focus-visible,
.simple-calculator input:focus-visible,
.simple-calculator textarea:focus-visible { outline: 3px solid #91b8dc; outline-offset: 3px; }

.simple-calculator .result-actions { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 16px 24px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--rule); }
.simple-calculator .internal-number-field { flex: 1 1 220px; max-width: 360px; min-width: 0; }
.simple-calculator .internal-number-field label { margin: 0 0 8px; font-size: 14px; }
.simple-calculator .internal-number-field label span { color: var(--muted); font-weight: 400; font-size: 12px; }
.simple-calculator #internal-number { background: white; color: var(--ink); border-color: #bdccdc; min-height: 44px; font-size: 16px; padding: 10px 12px; }
.simple-calculator .result-actions .print-button { margin-top: 0; min-height: 44px; }
.simple-calculator .internal-number-print { display: none; }

@media (min-width: 761px) and (max-width: 1050px) {
  .simple-calculator .stage-heading { display: block; }
  .simple-calculator .stage-kind { display: block; margin-top: 5px; }
}
@media (max-width: 760px) {
  .simple-calculator { width: calc(100% - 36px); }
  .simple-calculator header { min-height: 80px; padding: 14px 0; }
  .simple-calculator .brand-copy strong { font-size: 24px; }
  .simple-calculator .brand-copy small { font-size: 12px; }
  .simple-calculator .mark { width: 38px; height: 38px; flex-basis: 38px; }
  .simple-calculator .intro { padding: 26px 0 22px; }
  .simple-calculator h1 { font-size: clamp(30px, 5.7vw, 42px); letter-spacing: -1px; }
  .simple-calculator .intro > p { font-size: 15px; }
  .simple-calculator .input-card,
  .simple-calculator .result { padding: 20px; }
  .simple-calculator #form { display: flex; flex-direction: column; gap: 0; }
  .simple-calculator label[for="start"] { margin-bottom: 12px; }
  .simple-calculator #start { min-height: 56px; font-size: 22px; }
  .simple-calculator .date-help { margin-top: 10px; }
  .simple-calculator .text-button { padding-top: 12px; }
  .simple-calculator .primary { margin-top: 18px; min-height: 54px; font-size: 16px; }
  .simple-calculator .settings { width: 100%; margin-top: 20px; padding: 16px 0 0; border-left: none; border-top: 1px solid var(--rule); }
  .simple-calculator #error:not(:empty) { margin-top: 10px; }
  .simple-calculator .deadline-stages { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .simple-calculator .deadline-stage + .deadline-stage { border-left: none; border-top: 1px solid var(--rule); padding: 22px 0 0; }
  .simple-calculator .big-date { font-size: clamp(34px, 8vw, 52px); }
  .simple-calculator .print-button { margin-top: 18px; }
  .simple-calculator .explanation { grid-template-columns: 1fr; gap: 18px; }
  .simple-calculator footer { gap: 16px; }
}
@media (max-width: 390px) {
  .simple-calculator .law { display: none; }
}
@media print {
  body:has(.simple-calculator) { background: white; }
  .simple-calculator { width: 100%; max-width: none; }
  .simple-calculator header { min-height: 55px; padding: 8px 0; }
  .simple-calculator .mark { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  .simple-calculator .intro { padding: 16px 0; }
  .simple-calculator h1 { font-size: 28px; }
  .simple-calculator .calculator-help,
  .simple-calculator .result-actions,
  .simple-calculator #print { display: none; }
  .simple-calculator .internal-number-print:not(:empty) { display: block; margin: 20px 0 0; padding-top: 12px; border-top: 1px solid var(--rule); font-size: 14px; font-weight: 600; overflow-wrap: anywhere; }
  .simple-calculator .result { background: white; border: 1px solid var(--rule); padding: 20px; }
  .simple-calculator .deadline-stages { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; }
  .simple-calculator .deadline-stage { break-inside: avoid; }
  .simple-calculator .deadline-stage + .deadline-stage { border-left: 1px solid var(--rule); border-top: none; padding: 0 0 0 20px; }
  .simple-calculator .big-date { font-size: 38px; }
  .simple-calculator .calculator-note { font-size: 10px; }
}