/* Readable, open content and full-size portraits on phones. */
.hero-subject{margin-bottom:14px}
.exam-ready{display:inline-flex;align-items:center;gap:10px;background:#edc469;color:#23374f;border:1px solid #dfb457;border-radius:3px;padding:11px 16px;margin:0 0 25px;font:600 15px/1.4 var(--sans);letter-spacing:-.3px}
.exam-ready>span{display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#23374f;color:#fff5db;font-size:12px}
.exam-ready strong{font:inherit}
.catalog-ready{display:inline-flex;align-items:center;gap:8px;margin-top:20px;padding:8px 12px;background:#243d60;color:#fff6dc;font:500 13px/1.5 var(--sans);border-radius:2px}
.catalog-ready>span{color:#edc469}
.catalog-ready+.catalog-intro{margin-top:13px}
.proof-strip>div:nth-child(3){background:#243d60}
.proof-strip>div:nth-child(3) strong{color:#fff}
.proof-strip>div:nth-child(3) p{color:#dce7f5}
.proof-strip>div:nth-child(3) strong>.counter-value{color:#fff}
.textbook-section{background:#eef1f5;border-color:#d8e0e9}
.catalog-heading{align-items:center}
.catalog-heading em{color:#285781}
.catalog-seal{display:grid;grid-template-columns:1fr auto;gap:5px 20px;align-content:center;width:auto;min-width:245px;height:auto;padding:24px;border:1px solid #bdccdc;border-radius:0;transform:none;color:#263e5d;background:#fff}
.catalog-seal>span{font:500 12px/1.6 var(--sans);letter-spacing:0;text-align:left;margin:0}
.catalog-seal>b{font:400 11px/1.5 var(--sans);color:#68768a}
.catalog-seal>strong{grid-column:2;grid-row:1/3;font:500 40px/1 var(--sans);letter-spacing:-2px}
.catalog-seal>strong>span{font-size:13px;letter-spacing:0;margin-inline:2px}
.catalog-tabs{border-color:#c5d1de}
.catalog-tabs button{color:#53647a}
.catalog-tabs button[aria-selected=true]{background:#fff;color:#223f65;border-bottom-color:#285781}
.catalog-tabs button[aria-selected=true]>small{color:#285781}
.catalog-cover,.catalog-panel:nth-of-type(even) .catalog-cover{background:#d9e2ed}
#catalog-math2-concept .catalog-cover,#catalog-math2-practice .catalog-cover{background:#e7e1d4}
.catalog-book{background:#fff;border-color:#d5dde7}
.catalog-topic,.catalog-book-actions button{color:#285781}
.catalog-volume{color:#526780}
.catalog-peek{color:#263e5d;background:#ffffffec}
.catalog-arrows button{color:#263e5d;border-color:#9aadc4}
.catalog-foot{border-color:#c8d2df}.catalog-foot p>b{color:#263e5d}
.catalog-foot p>span,.catalog-scroll-note{color:#5e6e82}
.catalog-rail{scrollbar-color:#9bacc0 transparent}
.teacher-section{background:#fff}
.instructor-intro{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:70px;margin-bottom:64px}
.instructor-portrait{height:460px;margin:0;background:#f2f5f8;position:relative;overflow:hidden;border-radius:80px 0 0 0}
.instructor-portrait img{width:100%;height:100%;object-fit:cover;object-position:50% 35%;filter:none;mix-blend-mode:normal}
.instructor-portrait figcaption{position:absolute;bottom:0;left:0;right:0;display:flex;justify-content:space-between;align-items:center;gap:12px;background:#243d60;color:#fff;padding:19px 22px;font:500 15px/1.5 var(--sans);letter-spacing:2px}
.instructor-portrait figcaption span{font-size:11px;letter-spacing:0;color:#dce7f5}
.instructor-story h3{font:500 35px/1.65 var(--serif);letter-spacing:-1.4px;color:#24354c}
.instructor-story em{color:#315c83}
.instructor-story>p:last-child{font-size:14px;line-height:2;color:#5d6877;margin-top:25px;max-width:400px}
.instructor-biography{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.instructor-biography>section{min-width:0}
.instructor-biography h3{font-size:25px;font-weight:500;line-height:1.5;margin:0 0 24px;letter-spacing:-.8px;color:#253b58}
.instructor-biography .eyebrow{font-size:9px;letter-spacing:1.5px;color:#527398}
.instructor-credentials .credentials{border-top:2px solid #2a4568}
.instructor-credentials .credentials>div{grid-template-columns:80px 1fr;gap:20px;padding:20px 0;border-color:#dce2e9}
.instructor-credentials .credentials dt{font-size:12px;color:#496581}
.instructor-credentials .credentials dd{font-size:14px;line-height:1.95;color:#36485f}
.instructor-journey .journey-stages{display:block;border-top:2px solid #bd9643;padding-top:24px}
.instructor-journey .journey-stages li{display:block;border:0;border-left:1px solid #d9c397;padding:0 0 27px 23px;margin:0 0 8px;position:relative}
.instructor-journey .journey-stages li:before{content:'';position:absolute;width:7px;height:7px;border-radius:50%;background:#a47d28;left:-4px;top:5px}
.instructor-journey .journey-stages li:last-child{padding-bottom:0}
.instructor-journey .journey-period{font-size:11px;letter-spacing:0;color:#927025}
.instructor-journey .journey-stages h4{font-size:17px;line-height:1.7;margin:10px 0;color:#283d58}
.instructor-journey .journey-stages p{font-size:13px;line-height:1.95;color:#626b77}
.teacher-section .six-perspectives{margin-top:48px;border-color:#dce2e9}
.lesson-portrait-intro{grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.lesson-portrait-intro .portrait-lesson{width:100%;max-width:none;height:400px;margin:0;background:#fff;border-radius:70px 0 0 0}
.portrait-lesson img{object-fit:cover;object-position:50% 35%;mix-blend-mode:normal}
.method-principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));overflow:visible;scroll-snap-type:none;gap:20px;padding:0}
.method-principles article{min-width:0;flex:none;border:0;background:#edf2f8;padding:24px;position:relative}
.method-principles article>span{position:static;display:block;font:500 13px/1 var(--sans);color:#3f648c;margin-bottom:17px}
.method-principles h3{font-size:18px;line-height:1.5;margin:0 0 10px;color:#243d60}
.method-principles p{font-size:12px;line-height:1.85;color:#566578}
.reviews-section .review-track>.review-card{background:#f0e9d9}
.reviews-section .review-track>.review-card:nth-child(even){background:#edf1f7}
.review-total{font-size:14px;color:#344c6a}
.review-total strong{font:500 36px/1.2 var(--sans);color:#243d60;letter-spacing:-1.5px}
.reviews-section .section-head{margin-bottom:25px}
.trial-invitation{background:#e8eef6;padding:40px;gap:50px}
.trial-invitation h3,.trial-invitation .text-link{color:#263e5d}
.trial-invitation p:not(.eyebrow){color:#51647c}
.trial-invitation .eyebrow{color:#486c92}
.trial-invitation .portrait-conversation{position:static;width:100%;max-width:none;height:310px;margin:25px 0 0;border-radius:65px 0 0 0}
.portrait-conversation img{object-fit:cover;object-position:50% 35%;mix-blend-mode:normal}
@media(max-width:900px){
 .instructor-intro{gap:35px}.instructor-biography{gap:35px}
 .instructor-story h3{font-size:30px}.instructor-portrait{height:420px}
 .instructor-credentials .credentials>div{grid-template-columns:1fr;gap:7px}
}
@media(max-width:760px){
 .exam-ready{font-size:14px;padding:10px 14px;margin-bottom:22px}
 .hero-subject{margin-bottom:12px}
 .catalog-ready{font-size:12px;margin-top:18px;padding:8px 11px}
 .portrait-hero{height:410px;max-width:none;border-top-left-radius:65px}
 .portrait-hero>img{object-position:67% 40%}
 .proof-strip>div,.proof-strip>div:first-child,.proof-strip>div:nth-child(even){min-height:139px}
 .proof-strip strong{font-size:40px}.proof-strip p{font-size:11px}
 .textbook-section>.section{padding-top:46px}
 .catalog-heading{display:grid;gap:25px;margin-bottom:25px}
 .catalog-heading h2{font-size:30px}.catalog-intro{font-size:12px}
 .catalog-seal{position:static;width:100%;min-width:0;height:auto;opacity:1;padding:16px 20px;gap:4px 24px}
 .catalog-seal>span{font-size:13px}.catalog-seal>b{font-size:11px}.catalog-seal>strong{font-size:38px}
 .catalog-tabs button{background:#dce4ef;padding:14px 9px;gap:7px;min-height:75px}
 .catalog-tabs button>span{font-size:11px}.catalog-tabs button>b{font-size:12px}.catalog-tabs button>small{display:none}
 .catalog-tabs button:last-child{color:#395a7a}
 .catalog-panel-head h3{font-size:15px}.catalog-panel-head p{font-size:11px}
 .catalog-book h4{font-size:21px}.catalog-book-actions button,.catalog-book-actions a{font-size:12px;padding-block:12px}
 .catalog-file-info{font-size:10px}
 .teacher-section>.section{padding-block:52px}
 .instructor-intro{display:flex;flex-direction:column;gap:28px;margin-bottom:42px;align-items:stretch}
 .instructor-portrait{width:100%;height:390px;border-top-left-radius:65px}
 .instructor-portrait figcaption{font-size:14px;padding:16px 18px}.instructor-portrait figcaption span{font-size:10px}
 .instructor-story .eyebrow{font-size:11px;letter-spacing:0;margin-bottom:14px}
 .instructor-story h3{font-size:29px;line-height:1.65}.instructor-story>p:last-child{font-size:14px;margin-top:17px}
 .instructor-biography{grid-template-columns:1fr;gap:38px}
 .instructor-biography h3{font-size:23px;margin-bottom:19px}
 .instructor-credentials .credentials>div{grid-template-columns:74px 1fr;gap:15px;padding:20px 0}
 .instructor-credentials .credentials dt{font-size:12px}.instructor-credentials .credentials dd{font-size:13px;line-height:1.95}
 .instructor-journey .journey-stages{padding-top:25px}
 .instructor-journey .journey-stages h4{font-size:18px}.instructor-journey .journey-stages p{font-size:14px;line-height:1.9}
 .teacher-section .six-perspectives{margin-top:36px}
 .lesson-portrait-intro{display:flex;flex-direction:column;align-items:stretch;gap:24px}
 .lesson-portrait-intro .section-note{font-size:13px;line-height:1.9}
 .lesson-portrait-intro h2{font-size:29px}
 .lesson-portrait-intro .portrait-lesson{flex:none;width:100%;max-width:none;height:345px;margin:0;border-radius:60px 0 0 0}
 .method-principles{display:grid;grid-template-columns:1fr;overflow:visible;gap:10px;margin-top:25px;padding:0}
 .method-principles article{display:grid;grid-template-columns:34px 1fr;gap:5px 14px;padding:19px 17px;flex:none;border:0}
 .method-principles article>span{grid-column:1;grid-row:1/3;display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#243d60;color:#fff;font-size:11px;margin:0}
 .method-principles h3{grid-column:2;font-size:18px;margin:0;line-height:1.5}
 .method-principles p{grid-column:2;font-size:12px;margin:0;line-height:1.75}
 .reviews-section .review-track>.review-card{padding:24px;flex-basis:92%}
 .reviews-section .review-card blockquote{font-size:19px;line-height:1.85}
 .review-total{font-size:12px}.review-total strong{font-size:30px;margin-left:6px}
 .review-carousel-controls{gap:10px}#review-range{font-size:10px;margin-right:3px}.review-carousel-controls>div{gap:6px}
 .review-carousel-controls button{width:36px;height:40px}
 .trial-invitation{padding:28px 22px;display:block;margin-inline:-21px}
 .trial-invitation>div:first-child{padding:0;min-height:0}
 .trial-invitation .eyebrow{font-size:9px;max-width:none}
 .trial-invitation h3{font-size:27px;line-height:1.65}
 .trial-invitation .portrait-conversation{position:static;max-width:none;width:100%;height:310px;flex:none;bottom:auto;right:auto;margin:23px 0 0;border-radius:60px 0 0 0}
 .trial-invitation>div+div{margin-top:25px}.trial-invitation p:not(.eyebrow){font-size:14px;line-height:1.95}
}
@media(max-width:360px){
 .portrait-hero{height:365px}.instructor-portrait{height:345px}
 .instructor-story h3{font-size:26px}.instructor-credentials .credentials>div{grid-template-columns:1fr;gap:6px}
 .instructor-credentials .credentials dd{font-size:14px}
 .catalog-tabs button{padding-inline:7px}.catalog-tabs button>span{font-size:10px}
 .catalog-heading h2{font-size:27px}.catalog-seal>strong{font-size:35px}
 .lesson-portrait-intro .portrait-lesson{height:300px}.lesson-portrait-intro h2{font-size:27px}
 .trial-invitation .portrait-conversation{width:100%;height:280px}.trial-invitation>div:first-child{padding:0}
 .trial-invitation h3{font-size:24px}
 .trial-invitation{margin-inline:-18px}
 .reviews-section .review-card blockquote{font-size:18px}
 .method-principles article{padding:17px 13px;gap:5px 11px}.method-principles h3{font-size:17px}
 .review-total strong{font-size:27px}.review-carousel-controls button{width:32px}
}