:root {
  color-scheme: light;
  --ink: #202a24;
  --muted: #68716b;
  --deep: #25372e;
  --green: #3f6651;
  --green-soft: #edf3ef;
  --gold: #a77b32;
  --gold-soft: #f7f0e1;
  --paper: #fbfaf6;
  --white: #fff;
  --line: #d9ddd8;
  --warn: #8a4f20;
  --shadow: 0 5px 18px rgba(34, 47, 39, .07);
  font-family: "Yu Gothic UI", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--paper); }
body { margin: 0; color: var(--ink); background: linear-gradient(180deg, #f3f0e8 0, var(--paper) 180px); }
button, input { font: inherit; }
button { cursor: pointer; }

.site-header { color: #fff; background: var(--deep); border-bottom: 4px solid var(--gold); }
.header-inner { width: min(1160px, calc(100% - 32px)); min-height: 86px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.eyebrow { margin: 0 0 4px; color: #dce7df; font-size: 12px; letter-spacing: .08em; }
h1 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(24px, 3vw, 34px); letter-spacing: .04em; }
h1 span { color: #e2be78; }
.compact-settings { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.compact-settings span { padding: 7px 11px; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; background: rgba(255,255,255,.08); font-size: 13px; font-weight: 700; white-space: nowrap; }

.app-shell { width: min(1160px, calc(100% - 32px)); margin: 18px auto; }
.app-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: 16px; }
.column { display: flex; flex-direction: column; gap: 12px; }
.panel { border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.96); box-shadow: var(--shadow); }
.input-panel, .cards-panel, .result-panel, .resource-panel { padding: 16px 18px; }
.section-heading { display: flex; align-items: center; gap: 10px; margin-bottom: 11px; }
.section-heading h2, .resource-heading-row h2 { margin: 0; font-size: 18px; }
.step { flex: 0 0 auto; padding: 3px 8px; border-radius: 4px; color: #fff; background: var(--green); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.section-note, .help-text { margin: -5px 0 10px; color: var(--muted); font-size: 12px; }

.main-input-wrap { width: 100%; display: flex; align-items: center; border: 2px solid #9ead9f; border-radius: 9px; background: #fff; overflow: hidden; }
.main-input-wrap:focus-within { border-color: var(--green); box-shadow: 0 0 0 3px rgba(63,102,81,.14); }
.number-input { width: 100%; min-width: 0; border: 1px solid #b9c1bb; border-radius: 7px; background: #fff; color: var(--ink); text-align: right; font-variant-numeric: tabular-nums; }
.number-input:focus { outline: 3px solid rgba(63,102,81,.18); border-color: var(--green); }
.main-input { height: 56px; padding: 6px 4px 6px 14px; border: 0; outline: 0 !important; font-size: 30px; font-weight: 800; }
.unit { padding: 0 14px 0 8px; font-size: 19px; font-weight: 800; color: var(--green); }
.help-text { margin: 7px 0 10px; }
.baseline-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 18px; padding-top: 10px; border-top: 1px dashed var(--line); color: var(--muted); font-size: 13px; }
.baseline-row strong { color: var(--ink); }

.result-panel { position: relative; border-color: #c7b078; background: linear-gradient(145deg, #fff 0, var(--gold-soft) 100%); text-align: center; }
.result-label { margin: 0; color: #725623; font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.main-result { margin: 8px 0 12px; display: flex; align-items: baseline; justify-content: center; gap: 6px; flex-wrap: wrap; }
.main-result span { font-size: 17px; font-weight: 700; }
.main-result strong { color: #704d13; font-family: Arial, sans-serif; font-size: clamp(48px, 6vw, 68px); line-height: .95; font-variant-numeric: tabular-nums; }
.reached-message { margin: 10px 0 4px; color: #704d13; font-size: 30px; font-weight: 900; }
.breakdown { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid #dfd2b3; border-radius: 8px; background: rgba(255,255,255,.7); }
.breakdown div { display: flex; justify-content: space-between; gap: 10px; padding: 9px 11px; font-size: 13px; }
.breakdown div + div { border-left: 1px solid #dfd2b3; }
.compare-text { margin: 9px 0 0; color: var(--muted); font-size: 12px; }
.used-cards-row { margin: 8px 0 0; color: var(--deep); font-size: 12px; }
.notice-stack { display: grid; gap: 6px; margin-top: 8px; }
.notice { margin: 0; padding: 7px 9px; border-radius: 6px; color: var(--warn); background: #fff5e9; border: 1px solid #e9cda9; font-size: 12px; font-weight: 700; }
.button-help { margin: -5px 0 0; color: var(--muted); font-size: 11px; text-align: center; }
.action-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px; }
.calculate-button, .copy-button, .clear-button { min-height: 44px; border-radius: 9px; font-weight: 800; }
.calculate-button { width: 100%; border: 0; color: #fff; background: var(--green); box-shadow: 0 3px 0 #294839; }
.calculate-button:hover { background: #345a46; }
.calculate-button:active { transform: translateY(1px); box-shadow: 0 2px 0 #294839; }
.copy-button { padding: 7px 16px; border: 1px solid var(--green); color: var(--green); background: var(--green-soft); }
.copy-button:hover { color: #fff; background: var(--green); }
.clear-button { padding: 7px 14px; border: 1px solid #9ba89f; color: var(--deep); background: #fff; }
.clear-button:hover { background: #f2f5f3; }

.card-list { display: grid; gap: 7px; }
.card-row { display: grid; grid-template-columns: 40px minmax(88px, 1fr) 114px 135px; align-items: center; gap: 10px; min-height: 54px; padding: 6px 9px; border: 1px solid var(--line); border-radius: 9px; background: #fdfdfb; }
.card-row img { display: block; border-radius: 8px; }
.card-row label { display: grid; gap: 1px; font-weight: 800; }
.card-row label small { color: var(--muted); font-size: 11px; font-weight: 500; }
.card-input { display: flex; align-items: center; gap: 5px; }
.card-input input { height: 38px; padding: 5px 8px; font-size: 18px; font-weight: 800; }
.card-input span { color: var(--muted); font-size: 13px; }
.batch-text { color: var(--muted); text-align: right; white-space: nowrap; }
.card-total-row, .after-cards, .all-cards-summary { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.card-total-row { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--line); font-size: 14px; }
.card-total-row strong { color: var(--green); font-size: 21px; }
.all-cards-summary { margin-top: 9px; padding: 8px 10px; border-radius: 7px; color: var(--deep); background: var(--green-soft); font-size: 13px; }
.all-cards-summary strong { white-space: nowrap; font-size: 16px; }
.after-cards { margin: 5px 0 0; color: var(--muted); font-size: 12px; flex-wrap: wrap; }
.after-cards strong { color: var(--ink); }
.carryover-row { margin: 7px 0 0; padding: 7px 9px; border-radius: 6px; color: var(--green); background: #edf5f0; border: 1px solid #bfd4c7; font-size: 12px; font-weight: 700; text-align: right; }
.carryover-row strong { margin-left: 8px; color: var(--ink); font-family: Arial, sans-serif; font-size: 18px; font-variant-numeric: tabular-nums; }

.resource-panel { padding-top: 13px; padding-bottom: 13px; }
.resource-heading-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.resource-heading-row span { color: var(--muted); font-size: 12px; }
.resource-result { display: flex; justify-content: space-between; align-items: baseline; margin-top: 6px; padding: 10px 13px; border-radius: 8px; background: var(--green-soft); }
.resource-result strong { color: var(--deep); font-family: Arial, sans-serif; font-size: 30px; font-variant-numeric: tabular-nums; }
.resource-result-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; margin-top: 8px; }
.resource-result-list div { padding: 9px; border-radius: 7px; background: var(--green-soft); text-align: center; }
.resource-result-list span { display: block; color: var(--muted); font-size: 11px; }
.resource-result-list strong { display: block; margin-top: 3px; font-size: 18px; font-variant-numeric: tabular-nums; }

.settings-panel { margin-top: 14px; overflow: hidden; }
.settings-panel summary { padding: 12px 16px; color: var(--deep); font-size: 14px; font-weight: 800; cursor: pointer; }
.settings-panel summary:hover { background: #f6f8f6; }
.settings-grid { padding: 2px 16px 16px; display: grid; grid-template-columns: 180px 1fr auto; gap: 14px; align-items: end; border-top: 1px solid var(--line); }
.settings-grid > label { padding-top: 12px; }
.settings-grid label { display: grid; gap: 5px; color: var(--muted); font-size: 12px; font-weight: 700; }
.settings-grid input { height: 38px; padding: 6px 8px; color: var(--ink); font-weight: 700; }
.settings-grid fieldset { margin: 0; padding: 9px 10px 10px; border: 1px solid var(--line); border-radius: 8px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.settings-grid legend { padding: 0 5px; color: var(--muted); font-size: 12px; font-weight: 700; }
.secondary-button { min-height: 38px; padding: 7px 13px; border: 1px solid #9ba89f; border-radius: 7px; color: var(--deep); background: #fff; font-size: 13px; font-weight: 800; }

footer { width: min(1160px, calc(100% - 32px)); margin: 16px auto 22px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.6; }
footer p { margin: 2px 0; }

@media (max-width: 900px) {
  .card-row { grid-template-columns: 40px minmax(82px, 1fr) 105px; }
  .batch-text { grid-column: 2 / 4; margin-top: -7px; }
  .settings-grid { grid-template-columns: 1fr; }
  .action-row { grid-template-columns: 1fr 1fr; }
  .calculate-button { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .header-inner { min-height: 104px; padding: 14px 0; align-items: flex-start; flex-direction: column; gap: 9px; }
  .compact-settings { justify-content: flex-start; }
  .app-shell { margin-top: 12px; }
  .app-grid { grid-template-columns: 1fr; }
  .column-left { display: contents; }
  .input-panel { order: 1; }
  .column-right { display: contents; }
  .cards-panel { order: 2; }
  .result-panel { order: 3; }
  .resource-panel { order: 4; }
  .action-row { order: 5; }
  .button-help { order: 6; }
  .settings-panel { margin-top: 12px; }
}

@media (max-width: 480px) {
  .header-inner, .app-shell, footer { width: min(100% - 20px, 1160px); }
  h1 { font-size: 23px; }
  .input-panel, .cards-panel, .result-panel, .resource-panel { padding: 14px 12px; }
  .main-input { font-size: 27px; }
  .baseline-row { display: grid; }
  .card-row { grid-template-columns: 36px minmax(75px, 1fr) 92px; gap: 7px; padding: 6px; }
  .card-row img { width: 36px; height: 36px; }
  .card-input input { font-size: 16px; padding-inline: 5px; }
  .batch-text { font-size: 10px; }
  .main-result strong { font-size: 48px; }
  .breakdown { grid-template-columns: 1fr; }
  .breakdown div + div { border-left: 0; border-top: 1px solid #dfd2b3; }
  .resource-result-list { grid-template-columns: 1fr 1fr; }
  .settings-grid fieldset { grid-template-columns: 1fr 1fr; }
  .action-row { grid-template-columns: 1fr; }
  .calculate-button { grid-column: auto; }
}

@media (max-width: 340px) {
  .compact-settings span { font-size: 11px; }
  .card-row { grid-template-columns: 34px 1fr 83px; }
  .card-row img { width: 34px; height: 34px; }
  .card-row label { font-size: 13px; }
  .card-input { gap: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}