.fundamental-section { margin-top: 20px; padding-top: 20px; border-top: 2px solid #dce3de; }
.fundamental-heading { display: flex; justify-content: space-between; gap: 15px; align-items: end; }
.fundamental-heading h2 { margin: 5px 0 0; }
.fundamental-heading > small { color: #68746d; text-align: right; }
.fundamental-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 14px; }
.fundamental-cards article { padding: 14px; border: 1px solid #dce3de; border-radius: 14px; background: #f8faf8; }
.fundamental-cards small, .fundamental-cards b, .fundamental-cards span { display: block; }
.fundamental-cards small, .fundamental-cards span { color: #68746d; }
.fundamental-cards b { margin: 7px 0; font-size: 18px; }
.fundamental-cards span { font-size: 12px; line-height: 1.5; }
.fundamental-explain { margin-top: 13px; padding: 13px; border-radius: 12px; background: #fff8ec; }
.fundamental-explain p { margin: 5px 0 0; color: #705f4c; line-height: 1.6; }
.fundamental-sources { max-width: 900px; margin: 16px auto 0; padding: 15px; border-radius: 14px; background: #eef4f0; color: #33493f; text-align: left; }
.fundamental-sources ul { margin: 10px 0 6px; padding-left: 20px; }
.fundamental-sources li { margin: 8px 0; }
.fundamental-sources a { color: #163b2d; font-weight: 800; }
.fundamental-sources span { display: block; margin-top: 3px; color: #68746d; font-size: 12px; line-height: 1.5; }
.fundamental-sources p { margin: 10px 0 0; color: #68746d; font-size: 12px; line-height: 1.6; }
.conference-card { margin-top: 14px; padding: 15px; border: 1px solid #dce3de; border-radius: 14px; }
.conference-card summary { cursor: pointer; font-size: 16px; }
.conference-note { margin: 10px 0; color: #68746d; font-size: 13px; line-height: 1.6; }
.conference-events { display: grid; gap: 9px; }
.conference-event { padding: 13px 14px; border-radius: 12px; background: #f8faf8; }
.conference-event > div { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.conference-event b, .conference-event strong { display: block; }
.conference-event strong { margin-top: 7px; }
.conference-event a { display: inline-block; margin-top: 8px; color: #163b2d; font-size: 13px; font-weight: 700; }
.conference-status { padding: 4px 8px; border-radius: 999px; background: #e6eee9; color: #2c6650; font-size: 12px; font-weight: 700; }
.conference-status.upcoming { background: #fff0df; color: #a85429; }
.official-link { display: inline-block; margin-top: 12px; color: #163b2d; font-weight: 700; }
.fundamental-loading, .fundamental-error, .fundamental-empty { padding: 18px; border-radius: 12px; background: #f4f6f2; color: #68746d; }
@media (max-width: 700px) {
  .fundamental-cards { grid-template-columns: 1fr 1fr; }
  .fundamental-heading { display: block; }
  .fundamental-heading > small { display: block; margin-top: 7px; text-align: left; }
}
@media (max-width: 380px) { .fundamental-cards { grid-template-columns: 1fr; } }