:root {
  color-scheme: light;
  --ink: #14201f;
  --muted: #5f6f6c;
  --line: rgba(35, 54, 51, 0.18);
  --glass: rgba(255, 255, 255, 0.58);
  --glass-strong: rgba(255, 255, 255, 0.74);
  --accent: #0f766e;
  --accent-strong: #0b5f59;
  --accent-soft: rgba(15, 118, 110, 0.11);
  --amber: #b45309;
  --warn: #b42318;
  --shadow: 0 24px 80px rgba(27, 45, 43, 0.18);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(239, 246, 246, 0.92), rgba(232, 239, 228, 0.82) 42%, rgba(246, 236, 220, 0.9)),
    repeating-linear-gradient(90deg, rgba(15, 118, 110, 0.08) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(52, 85, 80, 0.07) 0 1px, transparent 1px 72px);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    linear-gradient(115deg, rgba(15, 118, 110, 0.16), transparent 34%),
    linear-gradient(295deg, rgba(194, 112, 68, 0.15), transparent 38%);
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.app {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0;
}

.intro {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: 4rem;
  line-height: 1;
  letter-spacing: 0;
}

.summary {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  gap: 18px;
  align-items: start;
}

.panel {
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 8px;
  background: var(--glass);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px) saturate(1.18);
  -webkit-backdrop-filter: blur(22px) saturate(1.18);
}

.calculator-panel {
  display: grid;
  gap: 20px;
  padding: 22px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  min-height: 44px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.42);
}

.segment {
  min-height: 36px;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  font-weight: 700;
}

.segment.is-active {
  color: white;
  background: var(--accent);
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.24);
}

.field-group {
  display: none;
  gap: 18px;
}

.field-group.is-active {
  display: grid;
}

.compact-group {
  gap: 0;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-block {
  display: grid;
  gap: 14px;
  padding-top: 2px;
}

.form-block + .form-block {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.form-block h2 {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.88rem;
  letter-spacing: 0;
}

.field {
  display: grid;
  gap: 8px;
}

.field span,
.check-field span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.field input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: 0;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.68);
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.field input:focus {
  border-color: rgba(15, 118, 110, 0.68);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.14);
}

.field.is-disabled {
  opacity: 0.54;
}

.field input:disabled {
  color: rgba(20, 32, 31, 0.56);
  background: rgba(255, 255, 255, 0.34);
}

.optional-box {
  display: grid;
  grid-template-columns: minmax(170px, 0.65fr) minmax(0, 1fr);
  gap: 12px 14px;
  align-items: end;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.34);
}

.span-all {
  grid-column: 1 / -1;
}

.collapsible {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.24);
}

.collapsible summary {
  cursor: pointer;
  padding: 13px 14px;
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 800;
}

.collapsible .optional-box {
  margin: 0 14px 14px;
  border-color: rgba(35, 54, 51, 0.12);
}

.move-collapsible-body {
  display: grid;
  gap: 12px;
  margin: 0 14px 14px;
}

.move-collapsible-body > .optional-box,
.move-panel .optional-box {
  margin: 0;
}

.option-line {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.34);
}

.move-panel {
  display: grid;
  gap: 12px;
}

.candidate-tabs {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 36px;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.38);
}

.candidate-tab-list {
  display: flex;
  gap: 4px;
  min-width: 0;
  overflow-x: auto;
}

.candidate-tab {
  flex: 0 0 auto;
  min-height: 34px;
  min-width: 72px;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  font-size: 0.88rem;
  font-weight: 800;
}

.candidate-tab.is-active {
  color: #fff;
  background: var(--accent);
}

.candidate-add {
  min-height: 34px;
  border: 0;
  border-radius: 6px;
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.62);
  font-size: 1.15rem;
  font-weight: 900;
}

.schedule-editor {
  display: grid;
  gap: 12px;
}

.schedule-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.schedule-summary span {
  display: grid;
  gap: 3px;
  min-height: 54px;
  padding: 9px 10px;
  border: 1px solid rgba(35, 54, 51, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.36);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.schedule-summary strong {
  color: var(--ink);
  font-size: 1rem;
}

.schedule-grid {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 8px 10px;
  align-items: center;
}

.schedule-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.slot-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2px;
  touch-action: none;
  user-select: none;
}

.schedule-segment {
  display: grid;
  gap: 0;
  min-width: 0;
}

.segment-slots {
  display: grid;
  grid-template-columns: repeat(16, minmax(8px, 1fr));
  gap: 2px;
  min-width: 0;
}

.segment-axis {
  display: none;
}

.slot {
  min-width: 0;
  height: 22px;
  padding: 0;
  border: 1px solid rgba(35, 54, 51, 0.1);
  border-radius: 3px;
  background: rgba(215, 222, 220, 0.74);
}

.slot.is-alt-hour {
  background: rgba(178, 189, 186, 0.76);
}

.slot.is-six-hour {
  border-left-color: rgba(35, 54, 51, 0.34);
}

.slot.is-selected {
  border-color: rgba(15, 118, 110, 0.28);
  background: var(--accent);
}

.time-axis {
  display: grid;
  grid-template-columns: repeat(25, minmax(0, 1fr));
  color: var(--muted);
  font-size: 0.7rem;
}

.time-axis span {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
}

.time-axis span.is-major {
  color: var(--ink);
  font-weight: 800;
}

.time-axis-label {
  min-height: 1px;
}

.base-fields {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.check-field {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
}

.check-field input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.primary,
.ghost {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
}

.primary {
  border: 1px solid var(--accent);
  color: #fff;
  background: var(--accent);
}

.primary:hover {
  background: var(--accent-strong);
}

.ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.46);
}

.result-panel {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 18px;
  padding: 22px;
}

.result-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.result-heading strong {
  color: var(--accent-strong);
}

.hero-metric {
  display: grid;
  gap: 6px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.hero-metric span {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.hero-metric strong {
  overflow-wrap: anywhere;
  font-size: 3.4rem;
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-metric small {
  min-height: 1.35em;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.rate-stack {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.rate-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  min-height: 42px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(35, 54, 51, 0.12);
}

.rate-stage:last-child {
  border-bottom: 0;
}

.rate-stage span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.rate-stage strong {
  font-size: 1rem;
}

.rate-stage.is-final strong {
  color: var(--accent-strong);
}

.impact-bars {
  display: grid;
  gap: 12px;
  padding: 2px 0;
}

.impact-row {
  display: grid;
  gap: 6px;
}

.impact-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.impact-top strong {
  color: var(--ink);
  white-space: nowrap;
}

.impact-track {
  overflow: hidden;
  height: 8px;
  border-radius: 999px;
  background: rgba(35, 54, 51, 0.1);
}

.impact-track i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--amber));
}

.insights {
  display: grid;
  gap: 0;
}

.insight {
  margin: 0;
  padding: 10px 0;
  border-top: 1px solid rgba(35, 54, 51, 0.12);
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

.cost-chart {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 14px 0;
  border-top: 1px solid rgba(35, 54, 51, 0.12);
  border-bottom: 1px solid rgba(35, 54, 51, 0.12);
}

.cost-chart:empty {
  display: none;
}

.donut {
  position: relative;
  width: 128px;
  aspect-ratio: 1;
  border-radius: 50%;
}

.donut-center {
  position: absolute;
  inset: 22px;
  display: grid;
  place-items: center;
  align-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.82);
  text-align: center;
}

.donut-center span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.donut-center strong {
  color: var(--ink);
  font-size: 1.12rem;
}

.cost-legend {
  display: grid;
  gap: 8px;
}

.cost-legend-row {
  display: grid;
  grid-template-columns: 10px minmax(0, 0.8fr) auto auto;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 0.86rem;
}

.cost-legend-row i {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.cost-legend-row strong {
  color: var(--ink);
  font-style: normal;
}

.cost-legend-row em {
  min-width: 42px;
  color: var(--muted);
  font-style: normal;
  text-align: right;
}

.decision-card {
  display: grid;
  gap: 12px;
}

.decision-card:empty {
  display: none;
}

.decision-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid rgba(15, 118, 110, 0.2);
  border-radius: 8px;
  background: var(--accent-soft);
}

.decision-title span {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
}

.decision-title strong {
  color: var(--accent-strong);
}

.decision-title strong.is-bad {
  color: var(--warn);
}

.decision-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.decision-item {
  display: grid;
  gap: 4px;
  min-height: 66px;
  padding: 11px;
  border: 1px solid rgba(35, 54, 51, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.34);
}

.decision-item span {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.decision-item strong {
  overflow-wrap: anywhere;
  font-size: 1rem;
}

.metrics {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.metric {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-height: 44px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.metric dt {
  color: var(--muted);
  font-size: 0.92rem;
}

.metric dd {
  margin: 0;
  font-weight: 800;
  text-align: right;
}

.formula {
  margin: 0;
  padding: 13px 0 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.error {
  min-height: 1.4em;
  margin: 0;
  color: var(--warn);
  font-weight: 700;
}

@media (max-width: 860px) {
  .app {
    width: min(100% - 24px, 680px);
    padding: 28px 0;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .result-panel {
    position: static;
  }

  h1 {
    font-size: 3rem;
  }

  .hero-metric strong {
    font-size: 2.8rem;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 2.35rem;
  }

  .hero-metric strong {
    font-size: 2.2rem;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .optional-box {
    grid-template-columns: 1fr;
  }

  .decision-grid {
    grid-template-columns: 1fr;
  }

  .cost-chart {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .cost-legend {
    width: 100%;
  }

  .schedule-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .schedule-label,
  .time-axis,
  .time-axis-label {
    display: none;
  }

  .slot-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .schedule-segment {
    gap: 5px;
  }

  .segment-slots {
    grid-template-columns: repeat(16, minmax(10px, 1fr));
    gap: 2px;
  }

  .slot {
    height: 28px;
  }

  .segment-axis {
    display: grid;
    grid-template-columns: repeat(17, minmax(0, 1fr));
    color: var(--muted);
    font-size: 0.68rem;
    line-height: 1.1;
  }

  .segment-axis span {
    min-width: 0;
    overflow: visible;
    white-space: nowrap;
  }

  .segment-axis span:last-child {
    text-align: right;
  }

  .segment-axis span.is-major {
    color: var(--ink);
    font-weight: 800;
  }

  .calculator-panel,
  .result-panel {
    padding: 16px;
  }

  .metric {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .rate-stage,
  .impact-top {
    grid-template-columns: 1fr;
  }

  .rate-stage {
    gap: 4px;
  }

  .impact-top {
    display: grid;
    gap: 4px;
  }

  .metric dd {
    text-align: left;
  }
}