:root {
  --bg: #fff7f1;
  --panel: #ffffff;
  --panel-soft: #fff9f2;
  --line: #efd9ca;
  --deep-line: #e4b7a2;
  --text: #231714;
  --text-soft: #725d55;
  --brand-red: #df211a;
  --brand-red-deep: #ad1713;
  --brand-red-soft: #fff0ed;
  --gold: #ffd51f;
  --gold-deep: #d99a00;
  --accent: var(--brand-red);
  --accent-soft: var(--brand-red-soft);
  --label: #684f47;
  --bad: #c81e1e;
  --good: #27723a;
  --shadow: 0 24px 60px rgba(127, 31, 22, 0.14);
  --shadow-soft: 0 10px 28px rgba(127, 31, 22, 0.08);
  --font-title: 26px;
  --font-section: 15px;
  --font-label: 13px;
  --font-value: 14px;
  --font-meta: 11px;
  --font-small: 12px;
  --scenario-input-min-height: 744px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color: var(--text);
  background:
    linear-gradient(90deg, rgba(223, 33, 26, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(223, 33, 26, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, #fff7f2 0%, #fffdfb 62%, #fff8f1 100%);
  background-size: 36px 36px, 36px 36px, auto;
  min-height: 100vh;
}

.app-shell {
  width: min(1360px, calc(100% - 40px));
  margin: 18px auto;
}

.calculator-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 108px;
  gap: 14px;
  align-items: start;
}

h1, h2, h3, h4, p {
  margin: 0;
}

.work-area {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.99), rgba(255, 250, 246, 0.96));
  border: 1px solid var(--deep-line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
}

.work-area::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--brand-red-deep), var(--brand-red) 64%, var(--gold));
}

.topbar {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 12px;
  padding: 12px 8px 18px;
  border-bottom: 1px solid var(--line);
}

.topbar__left {
  display: grid;
  grid-template-columns: minmax(420px, 0.95fr) minmax(460px, 1.05fr);
  align-items: center;
  gap: 14px;
  width: 100%;
}

.brand-logo {
  width: clamp(320px, 36vw, 500px);
  height: auto;
  display: block;
  justify-self: center;
}

.company-info {
  display: grid;
  gap: 5px;
  min-width: 220px;
  padding-left: clamp(18px, 2.4vw, 28px);
  border-left: 1px solid #f0d2c2;
}

.company-info__name {
  color: #2a1712;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.company-info__meta,
.company-info__phone {
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.35;
}

.version-text {
  font-size: 0.72em;
  margin-left: 4px;
  vertical-align: baseline;
}

.topbar__tag,
.monthly-block__title {
  color: var(--accent);
  font-weight: 700;
  font-size: var(--font-small);
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  font-size: var(--font-title);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.18;
  color: #2a1712;
}

.compact-panel,
.monthly-panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.86);
  padding: 14px;
  box-shadow: var(--shadow-soft);
}

.panel-heading,
.monthly-panel__heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  padding: 2px 4px 14px;
  border-bottom: 1px solid var(--line);
}

.panel-heading__note {
  color: var(--brand-red-deep);
  font-size: var(--font-small);
  font-weight: 700;
  line-height: 1.35;
  text-align: right;
  padding: 7px 10px;
  background: #fff8ee;
  border: 1px solid #f0d4a0;
  border-radius: 10px;
  white-space: nowrap;
}

.triple-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.single-sheet-grid {
  display: grid;
  grid-template-columns: minmax(420px, 0.95fr) minmax(460px, 1.05fr);
  gap: 14px;
  align-items: start;
}

.scenario-column {
  min-width: 0;
  padding: 10px;
  border: 1px solid #efd9ca;
  border-radius: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #fff8f2 100%);
  display: grid;
  grid-template-rows: auto auto minmax(var(--scenario-input-min-height), auto) auto auto;
  align-content: start;
}

.scenario-column--wide {
  grid-template-rows: auto minmax(0, auto);
}

.scenario-column h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: var(--font-section);
  text-align: center;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.18;
  height: 58px;
  margin-bottom: 10px;
  padding: 11px 8px 9px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-red-deep) 0%, var(--brand-red) 70%, #f08a16 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.26), 0 10px 22px rgba(173, 23, 19, 0.18);
}

.column-section-title {
  margin: 8px 2px 7px;
  color: var(--brand-red-deep);
  font-size: var(--font-small);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.column-section-title--results {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed #e9cbbb;
}

.compact-grid {
  display: grid;
  gap: 7px;
  align-content: start;
}

.field {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) minmax(92px, 112px) 54px;
  align-items: center;
  column-gap: 8px;
  row-gap: 2px;
  padding: 5px 6px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(239, 217, 202, 0.82);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.field:hover {
  background: #ffffff;
  border-color: rgba(223, 33, 26, 0.24);
  transform: translateY(-1px);
}

.field__label-block {
  display: grid;
  justify-items: end;
  gap: 2px;
  min-width: 0;
}

.field label {
  font-size: var(--font-label);
  color: var(--label);
  text-align: right;
  font-weight: 600;
  line-height: 1.22;
  max-width: 100%;
}

.field__range {
  color: #7a8799;
  font-size: var(--font-meta);
  line-height: 1.2;
  text-align: right;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.field__unit {
  color: var(--text-soft);
  font-size: var(--font-meta);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.field input {
  width: 100%;
  min-width: 0;
  border: 1px solid #dcbfaf;
  border-radius: 8px;
  padding: 2px 9px;
  height: 30px;
  background: #fff;
  color: var(--text);
  font-size: var(--font-value);
  font-weight: 500;
  box-shadow: inset 0 1px 2px rgba(127, 31, 22, 0.08);
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(223, 33, 26, 0.12);
}

.field input.is-invalid {
  border-color: var(--bad);
  box-shadow: 0 0 0 3px rgba(200, 30, 30, 0.08);
}

.field__error {
  grid-column: 2 / 4;
  min-height: 12px;
  color: var(--bad);
  font-size: var(--font-meta);
  padding-left: 2px;
}

.field__error:empty {
  display: none;
}

.results-grid {
  display: grid;
  gap: 7px;
  align-content: start;
}

.result-item {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) minmax(92px, 112px) 54px;
  gap: 8px;
  align-items: center;
  padding: 5px 6px;
  border-radius: 10px;
  background: #fff5f3;
  border: 1px solid rgba(223, 33, 26, 0.12);
  position: relative;
}

.result-item__label {
  font-size: var(--font-label);
  color: var(--label);
  text-align: right;
  font-weight: 600;
  line-height: 1.22;
}

.result-item__value {
  font-size: var(--font-value);
  font-weight: 800;
  color: var(--accent);
  border: 1px solid #e0b9a8;
  background: #fff;
  min-height: 30px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  border-radius: 8px;
  box-shadow: inset 0 1px 2px rgba(127, 31, 22, 0.08);
  white-space: nowrap;
}

.result-item__value.is-empty {
  color: #7d8898;
}

.result-item__unit {
  font-size: var(--font-meta);
  color: var(--text-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.monthly-panel {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1.45fr 1fr;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 241, 230, 0.86) 100%);
}

.monthly-panel__heading {
  grid-column: 1 / -1;
}

.monthly-block {
  padding: 0 10px 2px;
  min-height: 104px;
}

.monthly-block--results {
  border-left: 1px solid var(--line);
  padding-left: 16px;
}

.compact-monthly-grid {
  display: grid;
  gap: 6px;
}

.compact-monthly-grid .field {
  grid-template-columns: minmax(220px, 1fr) 112px 58px;
}

.sum-check {
  margin-top: 6px;
  font-size: var(--font-meta);
  color: var(--text-soft);
}

.sum-check.is-valid {
  color: var(--good);
}

.sum-check.is-invalid {
  color: var(--bad);
}

.footer-note {
  margin-top: 12px;
  font-size: var(--font-meta);
  color: #80675d;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 2px 4px 0;
}

.action-bar {
  display: grid;
  gap: 8px;
  position: sticky;
  top: 18px;
}

.action-bar button {
  min-height: 48px;
  border: 1px solid #e1bda8;
  border-radius: 12px;
  background: linear-gradient(180deg, #ffffff 0%, #fff3eb 100%);
  color: var(--brand-red-deep);
  font-size: var(--font-small);
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.action-bar button:first-child {
  color: #ffffff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand-red-deep), var(--brand-red));
}

.action-bar button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  color: var(--brand-red);
}

.action-bar button:first-child:hover {
  color: #ffffff;
  box-shadow: 0 18px 34px rgba(223, 33, 26, 0.24);
}

.action-bar button:active {
  transform: translateY(0);
  background: linear-gradient(180deg, #ffe2d5 0%, #ffffff 100%);
}

@media (max-width: 1100px) {
  .calculator-frame {
    grid-template-columns: 1fr;
  }

  .action-bar {
    grid-template-columns: repeat(3, 1fr);
    position: static;
  }

  .triple-grid,
  .single-sheet-grid,
  .topbar__left,
  .monthly-panel {
    grid-template-columns: 1fr;
  }

  .scenario-column {
    grid-template-rows: none;
  }

  .monthly-block--results {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 10px;
    padding-top: 14px;
  }
}

@media (max-width: 680px) {
  :root {
    --font-title: 21px;
    --font-section: 14px;
    --font-label: 13px;
    --font-value: 14px;
  }

  .app-shell {
    width: calc(100% - 12px);
    margin: 8px auto 14px;
  }

  .work-area,
  .compact-panel,
  .monthly-panel {
    border-radius: 12px;
  }

  .work-area {
    padding: 12px;
  }

  .topbar {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .topbar__left,
  .panel-heading,
  .monthly-panel__heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .panel-heading__note {
    text-align: left;
    border-radius: 12px;
    white-space: normal;
  }

  .footer-note {
    display: block;
  }

  .company-info {
    padding-left: 0;
    border-left: 0;
  }

  .field,
  .compact-monthly-grid .field,
  .result-item {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .field label,
  .field__range,
  .result-item__label {
    text-align: left;
  }

  .field__label-block {
    justify-items: start;
  }

  .field__error {
    grid-column: 1;
  }

  .action-bar {
    grid-template-columns: 1fr;
  }
}