.teaching-station{max-width:1240px;padding-top:44px}.station-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;padding-bottom:25px;border-bottom:2px solid var(--red)}.station-heading h1{font-size:clamp(2.25rem,4.5vw,3.65rem);line-height:1.06;letter-spacing:-.025em;margin:13px 0 17px}.station-heading .secondary{white-space:nowrap;margin-top:24px}.station-big-question{font-family:var(--serif);font-size:1.35rem;max-width:760px}.station-key-questions{display:grid;grid-template-columns:200px minmax(0,1fr);gap:25px;padding:27px 0}.station-key-questions h2{font-size:1.6rem}.station-key-questions ol{list-style:none;counter-reset:key;display:grid;grid-template-columns:1fr 1fr;gap:13px 30px;padding:0;margin:0}.station-key-questions li{counter-increment:key;position:relative;padding-left:30px;font-size:1rem;line-height:1.5}.station-key-questions li:before{content:counter(key);position:absolute;left:0;color:var(--red);font-weight:700}.station-key-questions a{color:var(--ink);text-decoration:none}.station-key-questions a:hover{text-decoration:underline;text-decoration-color:var(--red)}.station-guide{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0}.station-guide summary{font-weight:600;color:var(--red);cursor:pointer}.station-guide .prose{max-width:850px;padding:12px 0}.station-browse-bar{display:flex;justify-content:space-between;align-items:end;gap:25px;padding:25px 0 8px}.station-browse-bar nav{display:flex;flex-wrap:wrap;gap:23px;padding-bottom:8px}.station-browse-bar nav a{font-weight:600;text-decoration:none;border-bottom:1px solid var(--red)}.station-browse-bar label,.tier-heading label{display:block;font-size:.875rem;margin-bottom:5px}.station-browse-bar select,.tier-heading select{font:inherit;font-size:.9375rem;border:1px solid #9eaaa1;border-radius:2px;background:white;padding:9px 30px 9px 10px;max-width:100%;color:var(--ink)}.station-browse-bar select{width:300px}.station-tier{padding-top:33px;scroll-margin-top:22px}.tier-heading{display:flex;justify-content:space-between;align-items:end;gap:25px}.tier-heading h2{font-size:2.05rem;font-weight:400;margin:0 0 6px}.tier-heading p{font-size:1rem;max-width:580px}.tier-heading>div:last-child{width:310px;flex-shrink:0}.tier-heading select{width:100%;text-overflow:ellipsis}.tier-count{font-size:.875rem;color:var(--muted);margin:12px 0}.resource-table{width:100%;border-collapse:collapse;border-top:2px solid var(--red);table-layout:fixed}.resource-table th{text-align:left;font-size:.875rem;color:var(--muted);font-weight:500;padding:12px 16px;border-bottom:1px solid var(--line);background:#f6f8f6}.resource-table th:first-child{width:23%}.resource-table th:last-child{width:15%}.resource-table td{vertical-align:top;border-bottom:1px solid var(--line);padding:17px 16px}.resource-kind{font-size:.9375rem}.resource-kind small,.resource-chapter{display:block;font-size:.875rem;color:var(--muted);margin-top:5px}.resource-title{font-size:1.08rem;font-weight:600;color:var(--red);text-underline-offset:3px;text-decoration-thickness:1px}.resource-more{margin-top:9px;font-size:.9375rem}.resource-more summary{font-size:.875rem;cursor:pointer;color:#536158}.resource-more p{line-height:1.6;margin:12px 0}.resource-more .planning-time{font-size:.875rem;color:var(--muted)}.resource-more .pdf-pair{display:flex;flex-direction:column;align-items:flex-start;gap:9px;margin:13px 0 0}.resource-more .pdf-pair a{background:none;border:0;padding:0;text-decoration:underline;font-size:.875rem}.resource-more .pdf-pair small{display:inline;margin-left:8px}.key-number{display:inline-flex;align-items:center;justify-content:center;min-width:25px;height:25px;border:1px solid #c9d0cb;border-radius:50%;margin:1px 6px 5px 0;font-size:.875rem}.mobile-label{display:none}.tier-empty{padding:20px;border-bottom:1px solid var(--line)}.station-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:25px;margin-top:45px;font-size:.9375rem}.station-tier:focus{outline:none}.station-tier:focus-visible{outline:2px solid var(--red);outline-offset:8px}
@media(max-width:800px){.station-key-questions{grid-template-columns:1fr;gap:17px}.station-key-questions ol{gap:13px 22px}.tier-heading{align-items:start;flex-direction:column;gap:16px}.tier-heading>div:last-child{width:100%;max-width:430px}.station-browse-bar{align-items:start;flex-direction:column;gap:15px}.resource-table th:first-child{width:25%}.resource-table th:last-child{width:17%}}
@media(max-width:560px){.teaching-station{padding-top:27px}.station-heading{display:block}.station-heading .secondary{display:inline-block;margin-top:18px}.station-heading h1{font-size:2.4rem}.station-key-questions ol{grid-template-columns:1fr}.station-browse-bar nav{gap:15px}.resource-table thead{display:none}.resource-table tr{display:grid;grid-template-columns:1fr auto;border-bottom:1px solid var(--line);padding:16px 0;gap:8px}.resource-table td{display:block;border:0;padding:0}.resource-kind{grid-column:1;font-size:.875rem}.resource-kind small{display:inline;margin-left:8px;font-size:.875rem}.resource-name{grid-column:1 / -1;grid-row:2}.resource-questions{grid-column:2;grid-row:1;text-align:right}.resource-title{font-size:1.05rem}.key-number{height:23px;min-width:23px;margin-bottom:0}.station-bottom{display:block}.station-bottom a{display:inline-block;margin-top:12px}}
.teacher-resource-page{max-width:1080px}.resource-breadcrumb{display:flex;flex-wrap:wrap;gap:10px;font-size:.85rem;margin-bottom:34px;color:var(--muted)}.task-heading{max-width:880px}.task-heading h1{font-size:clamp(2rem,4.3vw,3.2rem);line-height:1.15;margin:14px 0}.task-purpose{max-width:780px;line-height:1.7}.task-key-links{margin:18px 0}.task-key-links a{display:inline-grid;place-items:center;width:27px;height:27px;border:1px solid var(--red);margin-right:4px}.resource-part-nav{display:flex;gap:0;border-bottom:1px solid #d9dfdc;margin:20px 0 32px;overflow:auto}.resource-part-nav a{padding:14px 20px;white-space:nowrap;color:var(--ink);text-decoration:none;border-bottom:3px solid transparent}.resource-part-nav a[aria-current]{color:var(--red);border-color:var(--red);font-weight:650}.resource-part{max-width:900px}.task-instructions{font-size:1.1rem;line-height:1.9}.task-stage,.task-solution{border-top:1px solid #d9dfdc;margin-top:32px;padding-top:20px}.sorting-labels{display:flex;gap:16px;margin:20px 0}.sorting-labels span{border:1px solid #737e77;padding:12px 20px}.recognition-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:32px 0}.recognition-card{border:1px solid #bec8c1;padding:20px;min-width:0;break-inside:avoid}.recognition-card h3{font-family:inherit;font-size:.85rem;font-weight:650;margin:0 0 16px;color:var(--red)}.recognition-card>div{overflow-x:auto}.paper-instruction{border-left:3px solid var(--red);padding:10px 20px;margin:40px 0;color:var(--muted)}.task-footer{border-top:1px solid #d9dfdc;margin-top:50px;padding-top:20px;font-size:.9rem}.task-discussion{margin-top:32px}.resource-tools{align-items:center}.resource-tools .pdf-pair{flex-wrap:wrap}.resource-tools [data-pdf-links]{flex:1}.resource-tools .pdf-pair a:first-child{background:var(--red);border:1px solid var(--red);color:white;padding:12px 18px}.resource-tools .pdf-pair a:first-child small{color:white}.resource-part details{margin:12px 0}.resource-part .katex-display{overflow-x:auto;overflow-y:hidden;padding:6px 0}@media(max-width:600px){.recognition-cards{grid-template-columns:1fr}.resource-part-nav a{padding:12px}.resource-tools{align-items:stretch}.resource-tools .pdf-pair{flex-direction:column}.sorting-labels{flex-wrap:wrap}}
.bank-resource h2{font-size:1.4rem;margin:8px 0 12px}.bank-resource p{max-width:660px;line-height:1.7}.bank-links{min-width:235px}.bank-links>.secondary{margin-bottom:14px}.bank-links .pdf-pair{flex-direction:column;gap:10px}.bank-introduction{max-width:820px}.evidence-source{border-top:1px solid #d9dfdc;padding-top:14px;margin-top:22px}.examiner-evidence{margin:32px 0}.candidate-list li{margin-bottom:24px}.station-question-bank{margin-top:40px;padding-top:20px;border-top:2px solid var(--red)}

@media(max-width:600px){.resource-part-nav a{padding:12px 8px;font-size:.95rem}}

.linearity-route { display:grid;grid-template-columns:1fr 1fr;gap:24px 40px;border-block:1px solid var(--line);border-left:4px solid var(--red);padding:24px 28px;margin:24px 0 36px;background:#fff; }
.linearity-route h2 { font-size:2rem;margin:8px 0 14px; }
.linearity-route p { line-height:1.65;margin:8px 0; }
.linearity-laws { min-width:0;font-size:1rem;align-self:center; }
.linearity-laws .katex-display { margin:.5em 0;overflow-x:auto;overflow-y:hidden; }
.linearity-laws p { font-size:.875rem;color:var(--muted);text-align:center; }
.linearity-route-resources { display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;grid-column:1/-1;list-style:none;padding:18px 0 0;margin:0;border-top:1px solid var(--line); }
.linearity-route-resources li { display:flex;flex-direction:column;gap:8px; }
.linearity-route-resources span { font-size:.875rem;color:var(--muted); }
.linearity-route-resources a { color:var(--red-dark);font-weight:600;text-underline-offset:3px;line-height:1.5; }
@media(max-width:680px){.linearity-route{grid-template-columns:1fr;padding:20px 16px;gap:18px}.linearity-route-resources{grid-template-columns:1fr 1fr}.linearity-route h2{font-size:1.8rem}}