/* BMI 계산기 전용 스타일 */

nav { max-width: 760px; }
main { max-width: 760px; }

.unit-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.unit-tab {
  padding: 0.45rem 1rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.83rem;
  font-weight: 500;
  background: var(--surface);
  color: var(--text-sub);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}
.unit-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.unit-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin-bottom: 0.85rem;
}

.imperial-inputs {
  grid-template-columns: 1fr 1fr 1.2fr;
}

.bmr-options {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.85rem 0.95rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.input-group label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-sub);
}

.hint-inline {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: normal;
  color: var(--text-sub);
  opacity: 0.8;
  margin-left: 0.25rem;
}

.input-group input[type="number"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  min-height: 44px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input-group input[type="number"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.12);
}

.radio-row {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  min-height: 44px;
}

.opt {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}
.opt input[type="radio"] {
  accent-color: var(--primary);
  cursor: pointer;
}

.error {
  margin-bottom: 0.85rem;
  padding: 0.75rem 0.95rem;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  color: var(--error);
  font-size: 0.85rem;
}
.error[hidden] { display: none; }

.results {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}
.results[hidden] { display: none; }

.bmi-main {
  text-align: center;
  padding: 1.6rem 1.2rem;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.14), rgba(102, 126, 234, 0.04));
  border: 1px solid var(--primary);
  border-radius: 14px;
}

.bmi-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-bottom: 0.4rem;
}

.bmi-value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.03em;
  line-height: 1;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.bmi-class {
  margin-top: 0.55rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.standards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.std-card {
  padding: 0.95rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.std-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-bottom: 0.55rem;
}

.std-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.std-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0.6rem;
  font-size: 0.82rem;
  color: var(--text-sub);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  transition: all 0.15s;
}

.std-list li span {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  opacity: 0.85;
}

.std-list li.active {
  background: rgba(102, 126, 234, 0.12);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}
.std-list li.active span {
  opacity: 1;
}

.meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.meta-card {
  padding: 0.85rem 0.95rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.meta-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-bottom: 0.3rem;
}

.meta-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (max-width: 600px) {
  .inputs, .bmr-options { grid-template-columns: 1fr; }
  .imperial-inputs { grid-template-columns: 1fr 1fr; }
  .imperial-inputs .input-group:nth-child(3) { grid-column: 1 / -1; }
  .standards-grid { grid-template-columns: 1fr; }
  .bmi-value { font-size: 2.4rem; }
}

@media (max-width: 480px) {
  .meta-grid { grid-template-columns: 1fr; }
  .bmi-value { font-size: 2rem; }
  .std-list li { font-size: 0.78rem; }
}