:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #17212b;
  --muted: #5b6978;
  --primary: #006d77;
  --primary-weak: #d9f1f3;
  --border: #dbe3ec;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  background: radial-gradient(circle at 10% 10%, #edf9fa, transparent 35%), var(--bg);
  color: var(--text);
}

.container {
  width: min(900px, 92vw);
  margin: 40px auto;
}

.header h1 {
  margin: 0 0 8px;
}

.header p {
  margin: 0 0 24px;
  color: var(--muted);
}

.top-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 16px;
}

.status {
  padding: 14px 16px;
  border-radius: 10px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  background: #fff;
}

.status.loading {
  color: #075985;
  background: #f0f9ff;
}

.status.error {
  color: var(--danger);
  background: #fff5f5;
  border-color: #fecaca;
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  padding: 22px;
}

.hidden {
  display: none;
}

.progress {
  color: var(--muted);
  font-size: 14px;
}

.help {
  color: var(--muted);
  margin-top: 0;
}

.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin: 16px 0 22px;
}

.option-btn {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  text-align: left;
  background: #fff;
  cursor: pointer;
  transition: 0.15s ease;
}

.option-btn:hover {
  border-color: var(--primary);
}

.option-btn.selected {
  border-color: var(--primary);
  background: var(--primary-weak);
  color: #00464c;
  font-weight: 700;
}

.actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  background: var(--primary);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.secondary {
  background: #e6eef7;
  color: #17324a;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
}

.label {
  margin-bottom: 6px;
  color: var(--muted);
}

.value {
  margin-top: 0;
  font-size: 24px;
  font-weight: 700;
}

.value.total {
  color: #0f5132;
}

.summary {
  margin-top: 18px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.summary ul {
  margin: 0;
  padding-left: 18px;
}

.note {
  color: var(--muted);
}

@media (max-width: 600px) {
  .container {
    margin: 20px auto;
  }

  .card {
    padding: 16px;
  }
}