*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--surface);line-height:1.55}.container{width:min(1160px,92%);margin:auto}.site-header{position:sticky;top:0;z-index:20;background:var(--hdr);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:700}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--deep);color:#fff;font-size:0.8125rem}.brand b{color:var(--ac)}.nav nav{display:flex;gap:26px}.nav nav a{color:var(--text2);text-decoration:none;font-size:0.875rem;font-weight:600}.nav nav a:hover{color:var(--ac)}.menu-toggle{display:none;border:0;background:none;font-size:1.5625rem}.hero{padding:90px 0 75px;background:radial-gradient(circle at 85% 20%,var(--glow1) 0,transparent 32%),linear-gradient(135deg,var(--bg),var(--soft))}.hero-grid{display:grid;grid-template-columns:1.35fr .75fr;gap:70px;align-items:center}.eyebrow{font-size:0.75rem;letter-spacing:.16em;font-weight:800;color:var(--ac)}.hero h1{font-size:clamp(3rem,7vw,4.75rem);line-height:1.02;letter-spacing:-.05em;margin:18px 0}.hero h1 span{color:var(--ac)}.hero-text{font-size:1.25rem;color:var(--text2);max-width:650px}.hero-actions{display:flex;gap:12px;margin:30px 0}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:9px;padding:13px 20px;font-weight:750;text-decoration:none;border:1px solid transparent;cursor:pointer;font-size:0.875rem}.btn.primary{background:var(--deep);color:#fff}.btn.secondary{background:var(--surface);color:var(--text);border-color:var(--line2)}.btn.ghost{background:transparent;color:#fff;border-color:#475064}.trust-row{display:flex;gap:20px;flex-wrap:wrap;color:var(--mut);font-size:0.8125rem}.hero-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 20px 50px rgba(30,40,60,.09)}.card-top,.quiz-meta{display:flex;justify-content:space-between;align-items:center;color:var(--mut);font-size:0.8125rem}.pill,.tag{display:inline-block;border-radius:99px;background:var(--tint);color:var(--ac-d);padding:5px 9px;font-size:0.625rem;font-weight:800;letter-spacing:.08em}.progress,.quiz-progress{height:6px;background:var(--chip);border-radius:99px;overflow:hidden;margin:22px 0}.progress div{width:65%;height:100%;background:var(--ac2)}.hero-card h3{font-size:1.5625rem;margin:15px 0 5px}.hero-card p{color:var(--mut)}.text-link,.unit a,.note a{color:var(--ac);font-weight:750;text-decoration:none}.stats{background:var(--deep);color:#fff}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr)}.stat-grid div{padding:26px 20px;border-right:1px solid #343c4e}.stat-grid div:last-child{border:0}.stat-grid strong{display:block;font-size:1.5625rem}.stat-grid span{color:#aeb6c5;font-size:0.75rem}.section{padding:85px 0}.soft{background:var(--soft)}.section-head{display:flex;justify-content:space-between;gap:40px;align-items:end;margin-bottom:36px}.section-head h2{font-size:2.4375rem;letter-spacing:-.035em;margin:8px 0 0}.section-head p{max-width:460px;color:var(--mut)}.unit-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.unit{border:1px solid var(--line);border-radius:13px;padding:20px;background:var(--surface);min-height:205px}.unit>span,.resource>span{font-size:0.6875rem;color:var(--ac);font-weight:850}.unit h3,.resource h3{font-size:1.0625rem;line-height:1.25;margin:15px 0 8px}.unit p,.resource p{font-size:0.8125rem;color:var(--mut)}.unit a{font-size:0.75rem}.dark{background:var(--deep);color:#fff}.light h2,.light p{color:#fff}.light p{opacity:.7}.quiz-shell{max-width:820px;margin:auto;background:#24403f;border:1px solid #39445a;border-radius:18px;padding:32px}.quiz-progress{background:#343e51}.quiz-progress div{height:100%;width:20%;background:var(--ac2);transition:.3s}.quiz-shell h3{font-size:1.5625rem;line-height:1.35;margin:28px 0}.options{display:grid;gap:11px}.option{padding:15px 17px;border:1px solid #465269;border-radius:10px;background:#2b4746;color:#fff;text-align:left;cursor:pointer;font:inherit}.option:hover{border-color:var(--ac2)}.option.correct{border-color:#4da5cb;background:#112b36}.option.wrong{border-color:#d97878;background:#47252a}.option:disabled{cursor:default}.explanation{margin-top:18px;padding:15px;border-radius:10px;background:var(--soft);color:var(--line2);font-size:0.875rem}.hidden{display:none}.quiz-actions{display:flex;gap:10px;margin-top:22px}.quiz-actions .primary:disabled{opacity:.45;cursor:not-allowed}.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.resource{padding:23px;background:var(--surface);border:1px solid var(--line);border-radius:13px}.notes-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.note{padding:23px;border:1px solid var(--line);border-radius:13px;background:var(--surface)}.note h3{font-size:1.1875rem;line-height:1.25}.note p{color:var(--mut);font-size:0.8125rem}.note a{font-size:0.75rem}.cta{text-align:center;max-width:760px}.cta p{color:var(--mut);margin:12px auto 24px}footer{background:var(--deep2);color:#b8c0ce;padding:55px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}.footer-grid strong{display:block;color:#fff;margin-bottom:12px}.footer-grid a{display:block;color:#9da7b7;text-decoration:none;font-size:0.8125rem;margin:7px 0}.footer-brand{color:#fff}.copyright{border-top:1px solid #293244;margin-top:35px;padding-top:18px;font-size:0.75rem;color:var(--mut)}@media(max-width:900px){.unit-grid{grid-template-columns:repeat(2,1fr)}.notes-grid{grid-template-columns:repeat(2,1fr)}.hero-grid{grid-template-columns:1fr}.resource-grid{grid-template-columns:repeat(2,1fr)}.hero{padding-top:65px}.nav nav{display:none}.menu-toggle{display:block}.nav nav.open{display:flex;position:absolute;top:72px;left:0;right:0;background:var(--surface);padding:20px;flex-direction:column;border-bottom:1px solid var(--line2)}.section-head{display:block}.section-head p{margin-top:15px}}@media(max-width:560px){.unit-grid,.resource-grid,.notes-grid,.stat-grid{grid-template-columns:1fr}.hero h1{font-size:3.125rem}.hero-actions{flex-direction:column}.btn{width:100%}.trust-row{display:block}.trust-row span{display:block;margin:7px 0}.quiz-shell{padding:20px}.footer-grid{grid-template-columns:1fr}.section{padding:65px 0}}


/* Syllabus explorer */
.syllabus-tools{display:flex;gap:14px;align-items:center;justify-content:space-between;margin-bottom:20px}.syllabus-tabs{display:flex;gap:8px;flex-wrap:wrap}.syllabus-tab{border:1px solid var(--line2);background:var(--surface);color:var(--text2);border-radius:9px;padding:11px 16px;font:inherit;font-weight:700;cursor:pointer}.syllabus-tab.active{background:var(--deep);color:#fff;border-color:var(--deep)}.syllabus-tools input{width:min(340px,100%);padding:12px 14px;border:1px solid var(--line2);border-radius:9px;font:inherit}.syllabus-progress{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:18px}.syllabus-progress-top{display:flex;justify-content:space-between;gap:12px;font-size:0.8125rem;color:var(--text2);margin-bottom:10px}.syllabus-track{height:7px;border-radius:99px;background:var(--chip);overflow:hidden}.syllabus-track div{height:100%;width:0;background:var(--ac2);transition:width .2s}.syllabus-unit{border:1px solid var(--line);border-radius:12px;margin:10px 0;background:var(--surface);overflow:hidden}.syllabus-unit-head{display:flex;align-items:center;gap:12px;padding:17px 18px;cursor:pointer}.syllabus-unit-head summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;font-weight:750}.syllabus-unit-head summary::-webkit-details-marker{display:none}.syllabus-unit-head .unit-no{color:var(--ac);font-size:0.75rem;font-weight:850;white-space:nowrap}.syllabus-unit[open] .syllabus-unit-head{border-bottom:1px solid var(--chip)}.syllabus-topics{padding:8px 18px 16px}.syllabus-topic{display:flex;gap:10px;align-items:flex-start;padding:9px 0;color:var(--text2);font-size:0.875rem;line-height:1.45}.syllabus-topic input{margin-top:4px;accent-color:var(--ac)}.syllabus-topic.done span{text-decoration:line-through;color:var(--mut)}.syllabus-source{font-size:0.75rem;color:var(--mut);margin-top:22px}.syllabus-source a{color:var(--ac);font-weight:700}@media(max-width:700px){.syllabus-tools{align-items:stretch;flex-direction:column}.syllabus-tools input{width:100%}.syllabus-progress-top{flex-direction:column;gap:4px}.syllabus-unit-head{padding:15px}}

/* footer: five columns (brand, resources, plans, Law notes, Paper 1 notes) */
.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr 1.3fr;gap:28px}
@media(max-width:1100px){.footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:760px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr}}