:root {
  --bg: #edf2ec;
  --panel: #ffffff;
  --text: #17211d;
  --muted: #64716b;
  --line: #d5ded8;
  --accent: #165c46;
  --accent-strong: #0d4534;
  --accent-soft: #e2f0e9;
  --gold: #a7781d;
  --result: #123f32;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(22, 92, 70, 0.13), transparent 28rem),
    linear-gradient(145deg, #f7f9f6, var(--bg));
  font-family: "Avenir Next", "Hiragino Sans", "Yu Gothic", sans-serif;
}

button,
input {
  font: inherit;
}

.page {
  min-height: 100vh;
  padding: clamp(0.75rem, 3vw, 2rem);
}

.tool {
  width: min(920px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

.header,
.section-card,
.melds-section,
.result-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: 0 10px 28px rgba(23, 33, 29, 0.07);
}

.header {
  padding: clamp(1.1rem, 4vw, 1.75rem);
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(1.65rem, 5vw, 2.35rem);
  line-height: 1.2;
}

.header > p:last-child,
.section-heading p,
.hint,
.footnote {
  color: var(--muted);
  line-height: 1.55;
}

.header > p:last-child {
  margin-top: 0.45rem;
}

form,
.standard-fields {
  display: grid;
  gap: 1rem;
}

fieldset {
  min-width: 0;
  margin: 0;
}

.section-card,
.melds-section {
  padding: 1rem;
}

legend,
h2 {
  padding: 0 0.3rem;
  font-size: 1rem;
  font-weight: 800;
}

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

.choices {
  display: grid;
  gap: 0.5rem;
}

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

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

.choices-wrap {
  grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
}

.choice {
  position: relative;
  min-width: 0;
}

.choice input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.choice span {
  min-height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.4rem;
  color: #35423c;
  background: #fbfcfb;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease;
}

.choice input:checked + span {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.choice input:focus-visible + span {
  outline: 3px solid rgba(22, 92, 70, 0.25);
  outline-offset: 2px;
}

.choice input:disabled + span {
  cursor: not-allowed;
  opacity: 0.45;
}

.section-heading {
  margin-bottom: 0.9rem;
}

.section-heading h2 {
  padding: 0;
}

.section-heading p {
  margin-top: 0.25rem;
  font-size: 0.84rem;
}

.meld-card {
  display: grid;
  gap: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem;
  background: #fafcfb;
}

.meld-card legend {
  color: var(--accent-strong);
}

.option-row {
  display: grid;
  gap: 0.35rem;
}

.option-label {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
}

[hidden] {
  display: none !important;
}

.hint {
  margin: 0 0 0.7rem;
  font-size: 0.84rem;
}

.result-card {
  overflow: hidden;
  border-color: var(--result);
  color: #ffffff;
  background: var(--result);
  box-shadow: none;
}

.result-summary {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
}

.result-label,
.rounding {
  color: #c9ded6;
  font-size: 0.78rem;
  font-weight: 700;
}

.result-value {
  display: block;
  margin-top: 0.1rem;
  font-size: clamp(2.25rem, 8vw, 3.5rem);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.rounding {
  margin-bottom: 0.25rem;
  text-align: right;
}

.breakdown {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.45rem 1rem;
  margin: 0;
  padding: 0.85rem 1.2rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.08);
  font-size: 0.86rem;
}

.breakdown dt,
.breakdown dd {
  margin: 0;
}

.breakdown dt {
  color: #d8e8e2;
}

.breakdown dd {
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.score-section {
  padding: 0.95rem 1.2rem 1.1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.score-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.score-table caption {
  margin-bottom: 0.65rem;
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 800;
  text-align: left;
}

.score-table th,
.score-table td {
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  padding: 0.55rem 0.4rem;
  text-align: right;
  white-space: nowrap;
}

.score-table th:first-child {
  text-align: left;
}

.score-table thead th {
  color: #c9ded6;
  font-size: 0.72rem;
}

.score-table tbody th,
.score-table tbody td {
  font-size: 0.88rem;
  font-weight: 800;
}

.limit-label {
  display: inline-block;
  margin-left: 0.35rem;
  border-radius: 999px;
  padding: 0.12rem 0.35rem;
  color: #3c2b08;
  background: #f2d68f;
  font-size: 0.64rem;
  vertical-align: 0.1em;
}

.score-note {
  margin-top: 0.7rem;
  color: #c9ded6;
  font-size: 0.72rem;
  line-height: 1.5;
}

.notice {
  padding: 0.75rem 1.2rem;
  color: #fff2c8;
  background: rgba(167, 120, 29, 0.28);
  font-size: 0.82rem;
  line-height: 1.45;
}

.footnote {
  padding: 0 0.25rem 0.4rem;
  font-size: 0.78rem;
  text-align: center;
}

@media (max-width: 680px) {
  .meld-grid {
    grid-template-columns: 1fr;
  }

  .result-summary {
    align-items: center;
  }
}

@media (max-width: 390px) {
  .choices-3 {
    grid-template-columns: 1fr;
  }

  .choices-3 .choice span {
    min-height: 40px;
  }

  .result-summary {
    padding: 0.85rem 1rem;
  }

  .breakdown {
    max-height: 9rem;
    overflow-y: auto;
    padding-inline: 1rem;
  }

  .score-section {
    overflow-x: auto;
    padding-inline: 1rem;
  }

  .score-table {
    min-width: 20rem;
  }
}