:root {
  --paper: #f4eddc;
  --paper-shadow: #eadcbb;
  --ink: #1f1a16;
  --copper: #9b5d35;
  --ember: #c77c2d;
  --forest: #4d5f43;
  --wine: #6d3022;
  --line: rgba(31, 26, 22, 0.16);
  --panel: rgba(255, 249, 238, 0.88);
  --panel-strong: rgba(255, 244, 226, 0.96);
  --shadow: 0 24px 60px rgba(55, 30, 12, 0.16);
}

html {
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(199, 124, 45, 0.24), transparent 34%),
    radial-gradient(circle at top right, rgba(77, 95, 67, 0.22), transparent 28%),
    linear-gradient(160deg, #f9f4e6 0%, #ebdfc5 52%, #d8c39d 100%);
  min-height: 100vh;
}

.page-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 20px 40px;
}

.hero {
  padding: 0 0 4px;
}

.mobile-tool-nav {
  display: none;
}

#calculator-section,
#deck-section {
  scroll-margin-top: 72px;
}

.kicker,
.eyebrow {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--wine);
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 700;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1;
  max-width: none;
}

.assumption-strip {
  margin-top: 22px;
  padding: 20px 24px;
  border-left: 6px solid var(--copper);
  border-radius: 18px;
  background: rgba(255, 247, 232, 0.78);
  box-shadow: 0 12px 32px rgba(55, 30, 12, 0.1);
}

.assumption-strip ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.layout-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 24px;
}

.panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
}

.panel-copy {
  margin: 0 0 18px;
  line-height: 1.5;
}

.calculator-panel {
  display: grid;
  gap: 16px;
}

.calculator-mode-panel {
  display: grid;
  gap: 4px;
}

.calculator-type-field {
  margin-bottom: 2px;
}

.field-group-heading {
  margin: 0 0 6px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(31, 26, 22, 0.66);
}

.calculator-form {
  display: grid;
  gap: 14px;
}

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

.calculator-form.is-disabled {
  opacity: 0.62;
}

.calculator-form.is-disabled button:hover {
  transform: none;
  box-shadow: none;
}

.field-grid {
  display: grid;
  gap: 10px;
}

.field-grid--pair {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field-grid--triple {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compact-grid label span {
  line-height: 1.15;
}

.compact-note {
  font-size: 0.92rem;
}

label {
  display: grid;
  gap: 8px;
  font-size: 0.94rem;
}

input,
select,
button {
  font: inherit;
}

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

.number-stepper input {
  text-align: center;
  padding-left: 10px;
  padding-right: 10px;
}

.stepper-button {
  width: 42px;
  height: 42px;
  justify-self: stretch;
  padding: 0;
  border-radius: 14px;
  background: rgba(255, 250, 239, 0.92);
  color: var(--ink);
  border: 1px solid rgba(31, 26, 22, 0.14);
  box-shadow: none;
  font-size: 1.1rem;
  line-height: 1;
}

.stepper-button:hover {
  box-shadow: 0 10px 22px rgba(31, 26, 22, 0.08);
}

.stepper-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

input,
select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid rgba(31, 26, 22, 0.18);
  border-radius: 14px;
  background: rgba(255, 252, 246, 0.9);
  color: var(--ink);
}

input:focus,
select:focus,
button:focus {
  outline: 2px solid rgba(155, 93, 53, 0.36);
  outline-offset: 2px;
}

.checkbox-row {
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
}

.checkbox-row input {
  width: auto;
  margin-top: 4px;
}

button {
  justify-self: start;
  padding: 12px 18px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--wine), var(--copper));
  color: #fff8ef;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(109, 48, 34, 0.24);
}

.secondary-button {
  background: rgba(255, 250, 239, 0.84);
  color: var(--ink);
  border: 1px solid rgba(31, 26, 22, 0.14);
  box-shadow: none;
}

.secondary-button:hover {
  box-shadow: 0 10px 22px rgba(31, 26, 22, 0.08);
}

.choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.choice-row--segmented .choice-button {
  flex: 1 1 0;
}

.choice-button {
  padding: 10px 14px;
  background: rgba(255, 250, 239, 0.92);
  color: var(--ink);
  border: 1px solid rgba(31, 26, 22, 0.14);
  box-shadow: none;
}

.choice-button:hover {
  box-shadow: 0 10px 22px rgba(31, 26, 22, 0.08);
}

.choice-button.active {
  background: linear-gradient(135deg, var(--wine), var(--copper));
  color: #fff8ef;
  border-color: transparent;
}

.choice-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.results-shell {
  margin-top: 20px;
  display: grid;
  gap: 16px;
}

.status-box,
.error-box,
.best-card,
.table-card,
.distribution-card,
.summary-card,
.detail-card {
  padding: 16px 18px;
  border-radius: 18px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  overflow: hidden;
}

.deck-panel {
  margin-top: 24px;
}

.deck-editor {
  display: grid;
  gap: 14px;
}

.deck-editor-tabs {
  display: none;
}

.deck-editor-panels {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.deck-card {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 250, 239, 0.84);
  border: 1px solid rgba(31, 26, 22, 0.08);
}

.deck-card h3 {
  margin-bottom: 12px;
}

.deck-face-grid {
  display: grid;
  gap: 10px;
}

.deck-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.deck-preview-shell {
  margin-top: 16px;
  display: grid;
  gap: 12px;
}

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

.tab-button {
  padding: 10px 14px;
  background: rgba(255, 250, 239, 0.92);
  color: var(--ink);
  border: 1px solid rgba(31, 26, 22, 0.14);
  box-shadow: none;
}

.tab-button:hover {
  box-shadow: 0 10px 22px rgba(31, 26, 22, 0.08);
}

.tab-button.active {
  background: linear-gradient(135deg, var(--wine), var(--copper));
  color: #fff8ef;
  border-color: transparent;
}

.compact-results {
  margin-top: 0;
}

.error-box {
  color: #5a180f;
  background: rgba(250, 223, 214, 0.92);
}

.best-card {
  background:
    linear-gradient(160deg, rgba(255, 244, 222, 0.96), rgba(245, 226, 191, 0.96)),
    radial-gradient(circle at right top, rgba(199, 124, 45, 0.14), transparent 32%);
}

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

.result-option-grid {
  display: grid;
  gap: 10px;
}

.result-option-card {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 250, 239, 0.86);
  border: 1px solid rgba(31, 26, 22, 0.08);
}

.result-option-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.result-option-rank {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(31, 26, 22, 0.58);
}

.result-option-title {
  margin: 4px 0 0;
  font-size: 1rem;
}

.result-option-copy {
  margin: 8px 0 0;
}

.mini-metric-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.mini-metric {
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 244, 226, 0.96);
  border: 1px solid rgba(31, 26, 22, 0.08);
  font-size: 0.88rem;
}

.detail-card {
  padding: 0;
}

.detail-card summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 18px;
  font-weight: 700;
}

.detail-card summary::-webkit-details-marker {
  display: none;
}

.detail-card[open] summary {
  border-bottom: 1px solid rgba(31, 26, 22, 0.08);
}

.detail-card-body {
  padding: 16px 18px 18px;
  display: grid;
  gap: 16px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.metric {
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 250, 239, 0.84);
  border: 1px solid rgba(31, 26, 22, 0.08);
}

.metric span {
  display: block;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(31, 26, 22, 0.66);
}

.metric strong {
  display: block;
  margin-top: 6px;
  font-size: 1.08rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  padding: 10px 8px;
  border-bottom: 1px solid rgba(31, 26, 22, 0.08);
  text-align: left;
  vertical-align: top;
}

th {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(31, 26, 22, 0.66);
}

.distribution-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.distribution-row {
  display: grid;
  grid-template-columns: 84px 1fr 64px;
  align-items: center;
  gap: 10px;
}

.distribution-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(31, 26, 22, 0.08);
  overflow: hidden;
}

.distribution-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--forest), var(--ember));
}

.subtle-note {
  margin: 0;
  line-height: 1.45;
  color: rgba(31, 26, 22, 0.74);
}

.hidden {
  display: none;
}

.visually-hidden-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 960px) {
  .deck-editor-panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .page-shell {
    padding: 12px 12px 28px;
  }

  .panel {
    padding: 16px;
    border-radius: 18px;
  }

  .hero {
    padding-bottom: 0;
  }

  h1 {
    font-size: 1.7rem;
  }

  .mobile-tool-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 10px;
    padding: 10px 0 4px;
    background: linear-gradient(180deg, rgba(249, 244, 230, 0.96), rgba(249, 244, 230, 0.82) 82%, transparent);
    backdrop-filter: blur(6px);
  }

  .mobile-tool-link {
    display: block;
    padding: 10px 12px;
    border-radius: 999px;
    text-align: center;
    text-decoration: none;
    color: var(--ink);
    background: rgba(255, 250, 239, 0.88);
    border: 1px solid rgba(31, 26, 22, 0.12);
    font-size: 0.92rem;
    font-weight: 700;
  }

  .layout-grid {
    margin-top: 16px;
    gap: 16px;
  }

  .panel-copy {
    margin-bottom: 12px;
    font-size: 0.92rem;
  }

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

  .field-grid--mobile-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .field-grid--mobile-triple {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  input,
  select {
    font-size: 16px;
  }

  .number-stepper {
    grid-template-columns: 40px minmax(0, 1fr) 40px;
    gap: 6px;
  }

  .stepper-button {
    width: 40px;
    height: 40px;
  }

  .deck-panel {
    margin-top: 16px;
  }

  .deck-editor {
    gap: 12px;
  }

  .deck-editor-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .deck-editor-tab {
    flex: 1 0 auto;
    padding: 10px 12px;
    white-space: nowrap;
  }

  .deck-editor-panels {
    display: block;
  }

  .deck-editor-panel {
    display: none;
  }

  .deck-editor-panel.active {
    display: block;
  }

  .deck-card {
    padding: 14px;
  }

  .deck-face-grid {
    gap: 8px;
  }

  .deck-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .calculator-form > button,
  .deck-actions > button {
    width: 100%;
    justify-self: stretch;
  }

  .checkbox-row {
    grid-template-columns: 24px 1fr;
    gap: 8px;
  }

  .distribution-row {
    grid-template-columns: 72px 1fr 58px;
  }

  .result-option-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .detail-card summary,
  .detail-card-body {
    padding-left: 14px;
    padding-right: 14px;
  }

  .choice-row {
    gap: 6px;
  }

  .choice-button {
    flex: 1 1 0;
    min-width: 0;
    padding: 10px 10px;
    font-size: 0.88rem;
  }

  table,
  tbody,
  tr,
  td {
    display: block;
    width: 100%;
  }

  thead {
    display: none;
  }

  tbody {
    display: grid;
    gap: 12px;
  }

  tr {
    padding: 14px;
    border: 1px solid rgba(31, 26, 22, 0.08);
    border-radius: 16px;
    background: rgba(255, 250, 239, 0.78);
  }

  td {
    padding: 0;
    border: 0;
  }

  td + td {
    margin-top: 8px;
  }

  td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 2px;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(31, 26, 22, 0.58);
  }
}