/* STEMSphere v10 — Biology-style lesson experience for every subject */
.ss-v10-lesson-hero{position:relative;overflow:hidden;padding:54px 0 38px;background:radial-gradient(circle at 86% 12%,rgba(108,77,246,.22),transparent 28%),radial-gradient(circle at 8% 86%,rgba(24,185,129,.14),transparent 27%),linear-gradient(180deg,var(--ss-surface),var(--ss-bg))}
.ss-v10-lesson-hero:before{content:"";position:absolute;width:360px;height:360px;border-radius:50%;right:-170px;bottom:-220px;background:rgba(255,199,58,.15)}
.ss-v10-hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:42px;align-items:center;position:relative;z-index:1}.ss-v10-hero-copy h1{font-size:clamp(2.45rem,4.8vw,4.5rem);line-height:1;letter-spacing:-.055em;margin:16px 0}.ss-v10-hero-copy>p{font-size:1.08rem;line-height:1.75;color:var(--ss-muted);max-width:760px}.ss-v10-meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.ss-v10-meta-row span{font-size:.78rem;font-weight:800;padding:8px 10px;border-radius:999px;background:var(--ss-surface);border:1px solid var(--ss-border);box-shadow:var(--ss-soft-shadow)}
.ss-v10-subject-art{position:relative;min-height:355px;border-radius:34px;background:linear-gradient(145deg,#29176e,#6b48ef 55%,#278ee9);box-shadow:0 30px 80px rgba(64,48,158,.27);overflow:hidden;display:grid;place-items:center;color:#fff}.ss-v10-subject-art:before,.ss-v10-subject-art:after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.1)}.ss-v10-subject-art:before{width:220px;height:220px;left:-75px;top:-90px}.ss-v10-subject-art:after{width:260px;height:260px;right:-105px;bottom:-120px}.ss-v10-art-core{width:130px;height:130px;display:grid;place-items:center;border-radius:35px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.2);backdrop-filter:blur(12px);font-size:5.3rem;transform:rotate(-5deg);box-shadow:0 25px 55px rgba(20,16,70,.22);z-index:2}.ss-v10-float{position:absolute;width:62px;height:62px;display:grid;place-items:center;border-radius:19px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.23);font-size:1.8rem;backdrop-filter:blur(9px);animation:ssV10Float 4.5s ease-in-out infinite}.ss-v10-float.f1{left:13%;top:17%}.ss-v10-float.f2{right:13%;top:16%;animation-delay:.7s}.ss-v10-float.f3{left:14%;bottom:23%;animation-delay:1.4s}.ss-v10-float.f4{right:12%;bottom:23%;animation-delay:2.1s}.ss-v10-art-label{position:absolute;left:22px;right:22px;bottom:19px;background:rgba(20,13,72,.35);border:1px solid rgba(255,255,255,.15);backdrop-filter:blur(15px);padding:13px 16px;border-radius:18px;z-index:3}.ss-v10-art-label strong,.ss-v10-art-label small{display:block}.ss-v10-art-label strong{font-size:1.05rem}.ss-v10-art-label small{opacity:.85;margin-top:3px}@keyframes ssV10Float{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-10px) rotate(4deg)}}
.ss-v10-lesson-section{padding-top:38px}.ss-v10-lesson-layout{display:grid;grid-template-columns:286px minmax(0,1fr);gap:22px;align-items:start}.ss-v10-toc{position:sticky;top:92px;padding:18px;max-height:calc(100vh - 110px);overflow:auto}.ss-v10-toc-title{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px}.ss-v10-toc-title strong{font-size:.73rem;color:var(--ss-muted)}.ss-v10-progress{height:7px;border-radius:999px;background:var(--ss-surface-2);overflow:hidden;margin-bottom:12px}.ss-v10-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--ss-purple),var(--ss-blue),var(--ss-green));border-radius:inherit;transition:width .25s}.ss-v10-toc nav{display:grid;gap:3px}.ss-v10-toc nav a{text-decoration:none;padding:9px 10px;border-radius:10px;color:var(--ss-muted);font-size:.82rem;font-weight:760;line-height:1.25;border:1px solid transparent}.ss-v10-toc nav a:hover,.ss-v10-toc nav a.active{color:var(--ss-purple);background:rgba(108,77,246,.08);border-color:rgba(108,77,246,.11)}.ss-v10-toc nav a.seen:after{content:" ✓";color:var(--ss-green);font-weight:900}.ss-v10-lesson-main{min-width:0;display:grid;gap:18px}.ss-v10-block{scroll-margin-top:95px}.ss-v10-block h2{font-size:clamp(1.55rem,2.4vw,2.1rem);letter-spacing:-.035em;margin:10px 0 14px}.ss-v10-block p,.ss-v10-block li{line-height:1.75}
.ss-v10-overview{overflow:hidden;position:relative;padding:25px}.ss-v10-overview-art{height:285px;border-radius:22px;margin-bottom:24px;position:relative;overflow:hidden;background:radial-gradient(circle at 25% 20%,rgba(88,200,255,.38),transparent 25%),radial-gradient(circle at 80% 80%,rgba(24,185,129,.30),transparent 25%),linear-gradient(135deg,#ede9ff,#e8f6ff 50%,#effff8);display:grid;place-items:center}.ss-v10-overview-art .main-icon{font-size:7.2rem;filter:drop-shadow(0 14px 20px rgba(67,53,150,.18))}.ss-v10-overview-art .orbit{position:absolute;width:64px;height:64px;border-radius:19px;display:grid;place-items:center;background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.8);box-shadow:0 13px 30px rgba(57,48,126,.12);font-size:2rem}.ss-v10-overview-art .o1{left:12%;top:18%}.ss-v10-overview-art .o2{right:13%;top:19%}.ss-v10-overview-art .o3{right:19%;bottom:12%}.ss-v10-definition{padding:18px 20px;border-radius:18px;background:linear-gradient(135deg,rgba(108,77,246,.08),rgba(44,140,255,.07));border-left:4px solid var(--ss-purple);font-size:1.02rem;line-height:1.7}.ss-v10-lead{font-size:1.02rem}.ss-v10-term-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:17px}.ss-v10-term-row span{padding:8px 11px;border-radius:999px;background:var(--ss-surface-2);border:1px solid var(--ss-border);font-size:.8rem;font-weight:850}
.ss-v10-objectives{margin:0;padding-left:0;list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.ss-v10-objectives li{position:relative;padding:15px 15px 15px 47px;border-radius:16px;background:var(--ss-surface-2);border:1px solid var(--ss-border)}.ss-v10-objectives li:before{content:"✓";position:absolute;left:14px;top:14px;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:rgba(24,185,129,.15);color:#087a55;font-weight:950}
.ss-v10-topic-head{display:flex;gap:13px;align-items:flex-start;margin-bottom:7px}.ss-v10-topic-head h2{margin:5px 0}.ss-v10-topic-block h3{margin-top:20px}.ss-v10-topic-block ul,.ss-v10-topic-block ol{padding-left:22px}.ss-v10-topic-block .ss-lesson-callout{margin-bottom:4px}
.ss-v10-stepper{margin-top:18px}.ss-v10-stepper .process-buttons{display:grid;gap:8px}.ss-v10-stepper .process-display{min-height:300px}.ss-v10-think{margin-top:18px;padding:13px 15px;border-radius:14px;background:rgba(255,199,58,.16);border:1px solid rgba(255,199,58,.28);line-height:1.55}.ss-v10-info-grid{margin-top:18px}.ss-v10-info-grid .info-card{min-height:185px}.ss-v10-info-grid .info-card strong{display:block;margin:8px 0}.ss-v10-info-grid .info-card p{margin:0}.ss-v10-activity{background:linear-gradient(135deg,color-mix(in srgb,var(--ss-green) 9%,var(--ss-surface)),var(--ss-surface))}.ss-v10-task-check{display:grid;gap:8px;margin-top:17px}.ss-v10-task-check label{display:flex;gap:9px;align-items:flex-start;padding:11px 13px;border-radius:13px;background:var(--ss-surface);border:1px solid var(--ss-border);font-weight:720}.ss-v10-task-check input{margin-top:3px;accent-color:var(--ss-green)}
.ss-v10-language .language-panel{margin-top:15px}.ss-v10-language .language-tabs{display:flex;gap:7px;flex-wrap:wrap}.ss-v10-language .language-tab{border:1px solid var(--ss-border);background:var(--ss-surface);color:var(--ss-ink);padding:9px 12px;border-radius:999px;font-weight:850;cursor:pointer}.ss-v10-language .language-tab.active{background:var(--ss-purple);border-color:var(--ss-purple);color:#fff}.ss-v10-language .translation-box{margin-top:13px;padding:18px;border-radius:18px;background:linear-gradient(135deg,rgba(108,77,246,.07),rgba(24,185,129,.06));border:1px solid var(--ss-border)}.ss-v10-language .translation-box h3{margin-top:0}.ss-v10-quiz .ss-check-panel{padding:0;border:0;box-shadow:none}.ss-v10-assignment li{margin:11px 0;padding-left:5px}.ss-v10-assignment li::marker{font-weight:900;color:var(--ss-purple)}
.ss-v10-block .callout{margin-top:18px;padding:16px 18px;border-radius:16px;background:rgba(44,140,255,.07);border-left:4px solid var(--ss-blue);line-height:1.65}.ss-v10-block .info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.ss-v10-block .info-card{padding:16px;border-radius:17px;background:var(--ss-surface-2);border:1px solid var(--ss-border)}.ss-v10-block .info-card .symbol{font-size:2rem}.ss-v10-block .feature-card{background:var(--ss-surface-2)}
.focus-mode .ss-announcement,.focus-mode .ss-header,.focus-mode .ss-footer,.focus-mode .ss-mobile-nav,.focus-mode .ss-v10-toc{display:none!important}.focus-mode .ss-v10-lesson-layout{grid-template-columns:1fr}.focus-mode .ss-v10-lesson-main{max-width:920px;margin:auto}.focus-mode .ss-v10-lesson-hero{padding-top:35px}
html[data-theme="dark"] .ss-v10-overview-art{background:radial-gradient(circle at 25% 20%,rgba(88,200,255,.18),transparent 25%),radial-gradient(circle at 80% 80%,rgba(24,185,129,.16),transparent 25%),linear-gradient(135deg,#1d2540,#18263c)}html[data-theme="dark"] .ss-v10-overview-art .orbit{background:rgba(23,30,49,.75);border-color:rgba(255,255,255,.08)}
@media(max-width:1000px){.ss-v10-hero-grid{grid-template-columns:1fr}.ss-v10-subject-art{min-height:300px}.ss-v10-lesson-layout{grid-template-columns:1fr}.ss-v10-toc{position:relative;top:auto;max-height:none}.ss-v10-toc nav{display:flex;overflow:auto;padding-bottom:5px}.ss-v10-toc nav a{white-space:nowrap}.ss-v10-objectives{grid-template-columns:1fr}}
@media(max-width:680px){.ss-v10-lesson-hero{padding:34px 0 25px}.ss-v10-hero-copy h1{font-size:clamp(2.25rem,12vw,3.15rem)}.ss-v10-subject-art{min-height:255px;border-radius:25px}.ss-v10-art-core{width:105px;height:105px;font-size:4.3rem}.ss-v10-float{width:50px;height:50px;font-size:1.45rem}.ss-v10-art-label{left:14px;right:14px;bottom:13px}.ss-v10-overview-art{height:220px}.ss-v10-overview-art .main-icon{font-size:5.5rem}.ss-v10-overview-art .orbit{width:50px;height:50px;font-size:1.5rem}.ss-v10-block .info-grid{grid-template-columns:1fr}.ss-v10-stepper .process-buttons{display:flex;overflow:auto}.ss-v10-stepper .process-btn{min-width:160px}.ss-v10-meta-row span{font-size:.7rem}.ss-v10-block{padding:18px}}