.bcm-shell{background:var(--color-sand-light);min-height:40vh}.bcm-container{max-width:860px;margin:0 auto;padding:0 1.5rem}.bcm-denied{text-align:center;padding:4rem 1rem}.bcm-denied h2{font-size:1.5rem;margin:1rem 0 .5rem}.bcm-denied p{color:#888;margin-bottom:1.5rem}.bcm-hero{background:radial-gradient(120% 120% at 90% -20%,color-mix(in srgb,var(--pc) 12%,transparent),transparent 55%),var(--color-sand-light);border-bottom:1px solid #eadcc8;padding:1.75rem 0 2rem}.bcm-back{font-size:.82rem;color:var(--color-coral);text-decoration:none}.bcm-back:hover{text-decoration:underline}.bcm-head{display:flex;align-items:center;gap:16px;margin-top:1rem}.bcm-num{width:52px;height:52px;flex:0 0 auto;border-radius:14px;display:flex;align-items:center;justify-content:center;font-family:"DM Serif Display",serif;font-size:26px;background:color-mix(in srgb,var(--pc) 14%,transparent);color:var(--pc)}.bcm-partlabel{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--pc);margin:0}.bcm-title{font-family:"DM Serif Display",serif;font-size:clamp(28px,5vw,40px);line-height:1.05;margin:.2rem 0 0;color:var(--color-dark)}.bcm-lede{font-size:15.5px;line-height:1.6;color:#6f7b89;margin:1rem 0 0;max-width:640px}.bcm-meta{display:flex;align-items:center;gap:10px;margin-top:1rem}.bcm-tag{font-size:11px;font-weight:700;padding:3px 10px;border-radius:7px;background:#f4ede2;border:1px solid #eadcc8;color:#6f7b89}.bcm-tag.ashore{color:#2f5dff}.bcm-tag.afloat{color:#0d4f3d}.bcm-tag.both{color:#7a4fb4}.bcm-exam{font-size:12px;color:#9aa2ab;font-weight:600}.bcm-devnote{background:#fff6ef;border:1px solid #f6dcc9;border-radius:12px;padding:.85rem 1.1rem;font-size:13.5px;color:#8a6a55;line-height:1.55;margin:1.75rem 0 0}.bcm-devnote strong{color:var(--color-coral)}.bcm-block{margin-top:2rem}.bcm-h2{font-family:"DM Serif Display",serif;font-size:22px;color:var(--color-dark);margin:0}.bcm-h2sub{font-size:13px;color:#9aa2ab;margin:.25rem 0 1rem}.bcm-lessons{display:flex;flex-direction:column;gap:8px}.bcm-lesson{display:flex;align-items:flex-start;gap:.8rem;width:100%;text-align:left;background:#fff;border:1px solid #eadcc8;border-radius:12px;padding:.85rem 1rem;cursor:pointer;font-family:Inter,sans-serif;transition:background .15s,border-color .15s}.bcm-lesson:hover{background:#fbf6ef}.bcm-lesson.is-done{background:#edf8f2;border-color:#1f9d5566}.bcm-check{width:24px;height:24px;border-radius:99px;border:2px solid var(--color-coral);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px;transition:.15s}.bcm-check svg{color:#fff;opacity:0;transition:opacity .15s}.bcm-lesson.is-done .bcm-check{background:#2e9e62;border-color:#2e9e62}.bcm-lesson.is-done .bcm-check svg{opacity:1}.bcm-lesson-label{font-size:14.5px;color:var(--color-dark);line-height:1.45}.bcm-lesson.is-done .bcm-lesson-label{color:#1c7a4a}.bcm-sims{display:flex;flex-direction:column;gap:16px}.bcm-sim-embed{border:1px solid #eadcc8;border-radius:14px;overflow:hidden;background:#fff}.bcm-sim-bar{display:flex;align-items:center;justify-content:space-between;padding:.6rem .9rem;border-bottom:1px solid #f0e7d8}.bcm-sim-name{font-size:13.5px;font-weight:700;color:var(--color-dark)}.bcm-sim-open{font-size:12.5px;font-weight:600;color:var(--color-coral);text-decoration:none}.bcm-sim-open:hover{text-decoration:underline}.bcm-sim-embed iframe{display:block;width:100%;height:600px;border:0;background:#cfe6f5}.bcm-sim-link{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.1rem;background:#fff;border:1px solid #eadcc8;border-radius:14px;text-decoration:none}.bcm-sim-link:hover{border-color:var(--color-coral)}.bcm-sim-todo{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.1rem;border:1px dashed #eadcc8;border-radius:14px}.bcm-sim-soon{font-size:12px;font-weight:600;color:#9aa2ab}.bcm-complete{margin-top:2.25rem;background:#fff;border:1px solid #eadcc8;border-radius:16px;padding:1.25rem 1.4rem}.bcm-complete-track{height:8px;background:#ede4d6;border-radius:99px;overflow:hidden;margin-bottom:.9rem}.bcm-complete-fill{height:100%;width:0%;background:#1f9d55;border-radius:99px;transition:width .4s ease}.bcm-complete-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.bcm-complete-text{font-size:13.5px;font-weight:600;color:#6f7b89}#bcm-complete-btn.is-complete{background:var(--color-green, #1F9D55)}.bcm-nav{display:flex;justify-content:space-between;gap:12px;margin:1.75rem 0 3rem}.bcm-navlink{display:flex;flex-direction:column;gap:2px;background:#fff;border:1px solid #eadcc8;border-radius:12px;padding:.8rem 1.1rem;text-decoration:none;max-width:48%;transition:border-color .15s}.bcm-navlink:hover{border-color:var(--color-coral)}.bcm-navlink.next{text-align:right;margin-left:auto}.bcm-navlink.disabled{visibility:hidden}.bcm-navlink span{font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:#9aa2ab}.bcm-navlink b{font-size:14px;color:var(--color-dark)}@media(max-width:560px){.bcm-sim-embed iframe{height:460px}.bcm-navlink{max-width:100%}}.bcm-intro{font-size:15px;color:#6f7b89;line-height:1.6;margin:1.75rem 0 0}.bcm-reading{margin-top:1.75rem;display:flex;flex-direction:column;gap:2rem}.bcm-read{scroll-margin-top:1rem}.bcm-rh{font-family:"DM Serif Display",serif;font-size:23px;color:var(--color-dark);margin:0 0 .7rem;padding-top:1.5rem;border-top:1px solid #eadcc8;line-height:1.15}.bcm-reading .bcm-read:first-child .bcm-rh{border-top:none;padding-top:0}.bcm-prose{font-size:15px;line-height:1.72;color:#33383d}.bcm-prose p{margin:0 0 .85rem}.bcm-prose p:last-child{margin-bottom:0}.bcm-prose ul{margin:0 0 .95rem;padding-left:1.2rem}.bcm-prose li{margin:0 0 .45rem;padding-left:.15rem}.bcm-prose li::marker{color:var(--color-coral)}.bcm-prose strong{color:var(--color-dark);font-weight:700}.bcm-read .bcm-sim-embed{margin-top:1.15rem}.bcm-quiz{display:flex;flex-direction:column;gap:14px}.bcm-q{background:#fff;border:1px solid #eadcc8;border-radius:12px;padding:1rem 1.1rem}.bcm-q-text{font-size:15px;font-weight:600;color:var(--color-dark);margin:0 0 .85rem;line-height:1.5;display:flex;gap:.6rem}.bcm-q-num{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:color-mix(in srgb,#2f5dff 14%,transparent);color:#2f5dff;font-size:12px;display:flex;align-items:center;justify-content:center;font-weight:700;margin-top:1px}.bcm-q-opts{display:flex;flex-direction:column;gap:7px}.bcm-opt{text-align:left;background:#fbf7f0;border:1px solid #eadcc8;border-radius:9px;padding:.6rem .8rem;font-family:Inter,sans-serif;font-size:14px;color:var(--color-dark);cursor:pointer;transition:background .12s,border-color .12s}.bcm-opt:hover:not(:disabled){background:#f4ebdd}.bcm-opt:disabled{cursor:default}.bcm-opt.correct{background:#e9f8f0;border-color:#2e9e62;color:#1c7a4a;font-weight:600}.bcm-opt.wrong{background:#fdede9;border-color:#e0705a;color:#b83020}.bcm-q-why{margin-top:.7rem;font-size:13px;color:#5f6a75;line-height:1.55;background:#f4f6fb;border-left:3px solid #2f5dff;border-radius:0 6px 6px 0;padding:.55rem .8rem}.bcm-quiz-score{margin-top:14px;padding:.85rem 1rem;border-radius:10px;font-weight:700;font-size:14px;text-align:center;background:#f4ede2;color:#6f7b89}.bcm-quiz-score.pass{background:#1f9d5524;color:#1c7a4a}.bcm-quiz-score.fail{background:#e0a10029;color:#a97008}