.cma-course-nav,.cma-course-nav *{box-sizing:border-box}
.cma-course-nav{position:relative;width:100%;max-width:1200px;margin:0 auto;padding:48px 18px;color:#173c4a;text-align:center;font:16px/1.5 system-ui,sans-serif}
.cma-course-nav h2{font-size:clamp(26px,3vw,36px);font-weight:700;margin:0 0 12px}
.cma-course-nav p{max-width:none;padding:0;margin:0 0 24px}
.cma-course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.cma-diamond-cell{display:flex;align-items:center;justify-content:center;min-width:0;min-height:320px;padding:40px}
.cma-course-nav .cma-course-diamond{position:relative;display:block;flex:none;width:190px;height:190px;margin:0;padding:0;border:3px solid #173c4a;border-radius:8px;background:#173c4a;transform:rotate(45deg);overflow:hidden;box-shadow:0 6px 20px #173c4a30;text-decoration:none;text-transform:none;letter-spacing:0;color:white}
.cma-diamond-inner{position:absolute;inset:-42px;display:flex;align-items:center;justify-content:center;transform:rotate(-45deg)}
.cma-diamond-inner img{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover}
.cma-diamond-inner::after{content:"";position:absolute;inset:0;background:#081c3355}
.cma-diamond-label{position:relative;z-index:1;display:block;width:180px;padding:12px 4px;background:#081c33e8;font-size:20px;font-weight:700;line-height:1.3;text-align:center;color:#fff;white-space:normal}
.cma-diamond-label small{display:block;margin-top:6px;font-size:13px;font-weight:600;color:#fff}
.cma-course-diamond:hover{border-color:#e5a33d;box-shadow:0 6px 26px #173c4a55}
.cma-course-diamond:focus-visible{outline:4px solid #b36300;outline-offset:6px}
@media(max-width:1000px){.cma-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:660px){.cma-course-grid{grid-template-columns:1fr;gap:12px}.cma-diamond-cell{min-height:310px;padding:32px}.cma-course-nav{padding:32px 12px}}
@media(max-width:350px){.cma-course-nav .cma-course-diamond{width:170px;height:170px}.cma-diamond-label{width:160px;font-size:18px}.cma-diamond-cell{min-height:280px;padding:26px}}