.snp-lesson-guide{max-width:960px;margin:0 auto;color:#ecf2ff;line-height:1.7;font-size:18px}.snp-lesson-guide h2{font-size:clamp(24px,3vw,34px);line-height:1.2;margin:22px 0}.snp-guide-heading{display:flex;justify-content:space-between;align-items:center;color:#adc4e5;font-size:14px}.snp-guide-eyebrow{color:#a8e9dc;font-size:12px;letter-spacing:.12em;font-weight:800}.snp-guide-dots{display:flex;gap:8px;margin:14px 0 26px}.snp-guide-dots button{height:7px;flex:1;min-width:20px;border:0;border-radius:8px;background:#294563;padding:0;cursor:pointer}.snp-guide-dots button[aria-current=step]{background:#79ddc8}.snp-guide-dots button:disabled{opacity:.45;cursor:default}.snp-guide-bridge{border-left:3px solid #79ddc8;padding:2px 22px;background:linear-gradient(90deg,#173e47aa,transparent);margin:24px 0}.snp-guide-note{font-size:14px;color:#afc1d8;line-height:1.6}.snp-concept-card{border:1px solid #35516d;background:#10283e;border-radius:18px;padding:24px 28px;margin-bottom:18px}.snp-concept-card h3{font-size:21px;line-height:1.35;color:#a9ecde;margin:0 0 14px}.snp-concept-card p:last-child{margin-bottom:0}.snp-concept-terms{margin:20px 0 0}.snp-concept-terms>div{display:grid;grid-template-columns:minmax(110px,1fr) 2fr;gap:20px;padding:12px 0;border-top:1px solid #33506a}.snp-concept-terms dt{font-weight:700;color:#b2d6fa}.snp-concept-terms dd{margin:0}.snp-concept-sequence{padding-left:28px}.snp-concept-sequence li{padding:5px 0 5px 8px}.snp-guide-back,.snp-map-controls button{border:1px solid #42617e;background:#17324b;color:#eaf3ff;padding:10px 16px;border-radius:10px;font-size:15px;cursor:pointer}.snp-guide-back:hover,.snp-map-controls button:hover{background:#244961}.snp-learning-map{border:1px solid #406180;border-radius:20px;padding:24px;background:radial-gradient(ellipse at top,#173d52,#102338 75%);overflow:hidden}.snp-learning-map header h3{font-size:24px;line-height:1.3;margin:10px 0 26px}.snp-map-track{display:grid;grid-template-columns:repeat(var(--map-count),minmax(0,1fr));gap:17px;position:relative}.snp-map-track button{position:relative;min-height:150px;padding:18px 10px;border:1px solid #46657c;background:#18344c;border-radius:14px;color:#dce9f7;font:inherit;font-size:14px;line-height:1.4;text-align:center;cursor:pointer;transition:background .3s,border-color .3s,transform .3s}.snp-map-track button:focus-visible,.snp-lesson-guide button:focus-visible,.snp-concept-reminder summary:focus-visible{outline:3px solid #f1ca72;outline-offset:4px}.snp-map-number{display:flex;align-items:center;justify-content:center;margin:0 auto 14px;width:34px;height:34px;border-radius:50%;background:#2d5069;font-weight:800}.snp-map-track button[aria-pressed=true]{border-color:#8df0d9;background:#215450;color:white;transform:translateY(-4px);box-shadow:0 6px 28px #79ddc81c}.snp-map-track button[aria-pressed=true] .snp-map-number{background:#9be9d9;color:#092f30}.snp-map-track button.is-past{border-color:#5b9f96}.snp-learning-map[data-mode=sequence] .snp-map-track button:not(:last-child):after{content:'→';position:absolute;right:-17px;top:46%;color:#8ddfcf;font-size:20px}.snp-learning-map.is-playing .snp-map-track button[aria-pressed=true] .snp-map-number{animation:snp-guide-pulse 1.7s ease-in-out infinite}.snp-map-caption{min-height:160px;background:#0b1d30;border-radius:14px;margin:22px 0 16px;padding:20px}.snp-map-caption>[data-map-position]{font-size:12px;font-weight:800;color:#7ddbc6;text-transform:uppercase;letter-spacing:.07em}.snp-map-caption h4{font-size:20px;line-height:1.4;margin:10px 0}.snp-map-caption p{margin:0;color:#d2e0ef}.snp-map-controls{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}.snp-map-controls button:disabled{opacity:.4;cursor:default}.snp-map-controls [data-map-play]{background:#9be9d9;color:#092f30;font-weight:750}.snp-map-summary{font-size:16px;color:#d2e0ef;margin:22px 0 0}.snp-concept-reminder{border:1px solid #40617a;background:#102a40;border-radius:13px;margin:0 0 20px;padding:0;color:#dce9f6;font-size:16px;line-height:1.6}.snp-concept-reminder summary{cursor:pointer;padding:14px 18px;color:#aeeadd;font-weight:700}.snp-concept-reminder>div{padding:0 20px 18px}.snp-concept-reminder p{margin:12px 0}.snp-feedback-explanation{display:block;margin-top:8px}.snp-feedback-answer{display:block;margin-top:10px;color:inherit;font-weight:650}.snp-feedback-source{display:block;font-size:13px;margin-top:12px;opacity:.85}@keyframes snp-guide-pulse{50%{box-shadow:0 0 0 8px #9be9d922}}@media(max-width:650px){.snp-lesson-guide{font-size:17px}.snp-concept-card{padding:19px}.snp-concept-card h3{font-size:20px}.snp-concept-terms>div{grid-template-columns:1fr;gap:4px}.snp-learning-map{padding:18px 14px}.snp-map-track{grid-template-columns:1fr;gap:14px}.snp-map-track button{display:flex;align-items:center;gap:12px;min-height:66px;text-align:left;padding:12px;font-size:15px}.snp-map-number{margin:0;flex-shrink:0}.snp-learning-map[data-mode=sequence] .snp-map-track button:not(:last-child):after{content:'↓';right:50%;top:auto;bottom:-17px}.snp-map-track button[aria-pressed=true]{transform:none}.snp-map-caption{min-height:0}.snp-map-controls{justify-content:center}.snp-map-controls button{padding:10px;font-size:14px}.snp-guide-bridge{padding-left:15px}}@media(prefers-reduced-motion:reduce){.snp-map-track button{transition:none!important;transform:none!important}.snp-map-number{animation:none!important}}
/* Keep the primary map control readable on hover and focus. */
.snp-map-controls button[data-map-play],.snp-map-controls button[data-map-play]:hover{background:#9be9d9;color:#092f30}
@media(max-width:650px){.snp-map-track{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.snp-map-track button{flex-direction:column;justify-content:flex-start;min-height:100px;gap:8px;text-align:center;font-size:14px}.snp-learning-map[data-mode=sequence] .snp-map-track button:not(:last-child):after{display:none}.snp-learning-map header h3{font-size:21px;margin-bottom:18px}.snp-map-caption{padding:16px;margin-top:16px}.snp-map-caption h4{font-size:18px}.snp-concept-reminder h3{font-size:19px}}
.snp-visual-lead{font-size:17px;line-height:1.6;color:#c6dcea;margin:0 0 18px}.snp-visual-picker{display:flex;gap:8px;margin-bottom:15px}.snp-visual-picker button{border:1px solid #4f7287;border-radius:20px;background:#173a50;color:#d3e9f6;padding:9px 16px;font:inherit;font-size:14px;cursor:pointer}.snp-visual-picker button[aria-pressed=true]{background:#285b57;border-color:#88e0cc;color:white}.snp-deep-explanation{border:1px solid #3a6078;border-radius:13px;background:#122e44;padding:0 18px;margin:16px 0;line-height:1.7;font-size:17px}.snp-deep-explanation summary{cursor:pointer;color:#b7eadd;padding:16px 0;font-size:15px;font-weight:650;line-height:1.5}.snp-deep-explanation h3{font-size:19px;color:#c9e6f4}.snp-deep-explanation[open]{padding-bottom:16px}.snp-deep-explanation p{margin:12px 0}.snp-concept-library{margin-top:30px}.snp-concept-library>h3{font-size:22px;margin-bottom:8px}.snp-concept-library>p{font-size:15px;color:#adc4d6}.snp-deep-explanation summary:focus-visible{outline:3px solid #f6cc80;outline-offset:4px}.snp-lesson-guide [data-visual-host]>.snp-mechanism-intro:empty{display:none}.snp-lesson-guide [data-visual-host] .snp-system-svg{max-height:440px}.snp-lesson-guide .snp-concept-library details h3{display:none}