:root{--cf-bg:#07111f;--cf-panel:#0d1b2d;--cf-panel2:#10243b;--cf-text:#f8fafc;--cf-muted:#a9b8ca;--cf-cyan:#22d3ee;--cf-purple:#8b5cf6;--cf-green:#34d399;--cf-yellow:#fbbf24}
.cflh-shell{max-width:1220px;margin:28px auto;padding:0 18px;color:var(--cf-text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.cflh-shell *{box-sizing:border-box}.cflh-hero{padding:34px;border:1px solid rgba(255,255,255,.08);border-radius:26px;background:radial-gradient(circle at top right,rgba(139,92,246,.24),transparent 35%),linear-gradient(135deg,#0b1b2e,#07111f);box-shadow:0 24px 70px rgba(0,0,0,.28);margin-bottom:24px}.cflh-hero h1{font-size:clamp(34px,5vw,62px);line-height:1;margin:8px 0 12px;color:#fff}.cflh-hero p,.cflh-section-head p{color:var(--cf-muted);font-size:17px;margin:0}.cflh-kicker{font-size:12px;font-weight:900;letter-spacing:.16em;color:var(--cf-cyan)}.cflh-section-head,.cflh-title-row{display:flex;justify-content:space-between;align-items:end;margin:26px 0 16px}.cflh-section-head h2,.cflh-title-row h2{font-size:32px;margin:4px 0;color:#fff}.cflh-path-grid,.cflh-subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.cflh-path-card,.cflh-subject,.cflh-topic{display:block;text-decoration:none!important;color:#fff!important;border:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg,var(--cf-panel2),var(--cf-panel));border-radius:22px;padding:22px;transition:.2s transform,.2s border-color;box-shadow:0 14px 34px rgba(0,0,0,.18)}.cflh-path-card:hover,.cflh-subject:hover,.cflh-topic:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.55)}.cflh-icon,.cflh-subject>span{font-size:32px}.cflh-path-card h3,.cflh-subject h3,.cflh-topic h3{font-size:21px;margin:12px 0 5px;color:#fff}.cflh-path-card p,.cflh-subject p{color:var(--cf-muted);margin:0 0 14px}.cflh-open,.cflh-topic span{font-weight:850;color:var(--cf-cyan)}.cflh-back{display:inline-flex;margin:4px 0 10px;color:var(--cf-cyan)!important;text-decoration:none!important;font-weight:800}.cflh-centres{display:grid;grid-template-columns:1fr 1fr;gap:18px}.cflh-centre{display:flex;gap:20px;align-items:center;padding:30px;border-radius:24px;text-decoration:none!important;color:#fff!important;border:1px solid rgba(255,255,255,.09);box-shadow:0 18px 40px rgba(0,0,0,.2)}.cflh-centre>span{font-size:46px}.cflh-centre h3{font-size:28px;margin:0 0 7px;color:#fff}.cflh-centre p{margin:0;color:#d4dfeb}.cflh-question{background:linear-gradient(135deg,#16304d,#112238)}.cflh-learn{background:linear-gradient(135deg,#31205a,#17233d)}.cflh-topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.cflh-lesson{max-width:900px;margin:0 auto}.cflh-lesson>h2{font-size:42px;margin:6px 0 20px}.cflh-learnbox,.cflh-example,.cflh-empty{background:var(--cf-panel);border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:22px;margin:14px 0;color:#fff}.cflh-learnbox h3{margin-top:0}.cflh-learnbox li{margin:8px 0;color:#d8e2ec}.cflh-example{border-left:4px solid var(--cf-yellow)}.cflh-test,.cflh-form button{display:inline-flex;padding:13px 18px;border:0;border-radius:13px;background:linear-gradient(135deg,#06b6d4,#2563eb);color:#fff!important;font-weight:900;text-decoration:none!important;cursor:pointer}.cflh-filter-row{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px}.cflh-filter-row a{padding:9px 12px;border-radius:999px;background:#10243b;color:#dce8f5!important;text-decoration:none!important;border:1px solid rgba(255,255,255,.08)}.cflh-q{background:var(--cf-panel);border:1px solid rgba(255,255,255,.08);border-radius:16px;margin:10px 0;overflow:hidden}.cflh-q summary{padding:18px;cursor:pointer;display:flex;flex-direction:column;gap:5px}.cflh-q summary span{font-size:12px;color:var(--cf-cyan);font-weight:850}.cflh-q summary strong{font-size:18px}.cflh-q>div{padding:0 18px 18px;color:#d8e2ec}.cflh-answer{margin-top:12px;padding:12px;border-radius:12px;background:#07111f}.cflh-editor-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.cflh-form{background:var(--cf-panel);border:1px solid rgba(255,255,255,.08);border-radius:22px;padding:24px}.cflh-form h2{margin-top:0}.cflh-form label{display:block;font-weight:800;margin:14px 0;color:#fff}.cflh-form small{color:var(--cf-muted);font-weight:500}.cflh-form input,.cflh-form select,.cflh-form textarea{display:block;width:100%;margin-top:7px;padding:12px 13px;border:1px solid rgba(255,255,255,.13);border-radius:12px;background:#07111f;color:#fff}.cflh-notice{padding:13px 16px;background:#064e3b;border:1px solid #34d399;border-radius:13px;margin:12px 0}
@media(max-width:900px){.cflh-path-grid,.cflh-subject-grid{grid-template-columns:repeat(2,1fr)}.cflh-topic-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){.cflh-shell{padding:0 12px}.cflh-hero{padding:24px 20px}.cflh-path-grid,.cflh-subject-grid,.cflh-topic-grid,.cflh-centres,.cflh-editor-grid{grid-template-columns:1fr}.cflh-centre{padding:22px}.cflh-centre h3{font-size:23px}.cflh-section-head h2,.cflh-title-row h2{font-size:27px}}

.cflh-lesson-steps{display:grid;gap:14px;margin:18px 0}.cflh-step{padding:22px;border-radius:18px;background:linear-gradient(135deg,#10243b,#0b1829);border:1px solid rgba(34,211,238,.15)}.cflh-step h3{margin:0 0 8px;color:#fff;font-size:20px}.cflh-step p{margin:0;color:#d8e2ec;line-height:1.7}.cflh-checklist{list-style:none;padding-left:0}.cflh-checklist li{padding:8px 0;color:#d8e2ec}