:root{--paper:#f7f5f0;--white:#fff;--ink:#222320;--muted:#6b6b63;--line:#ddddd4;--red:#a33127;--red-pale:#f0e4df;--blue:#365f78;--orange:#9a4d25;--sans:Arial,Helvetica,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.5}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--blue);outline-offset:4px}button:disabled{cursor:default}svg{display:block;flex-shrink:0}h1,h2,h3,p{margin:0}button{color:inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;left:15px;top:-100px;background:var(--ink);color:#fff;padding:12px 20px;z-index:9}.skip:focus{top:15px}.site-header{max-width:1440px;margin:auto;min-height:94px;padding:0 5.2%;display:flex;align-items:center;border-bottom:1px solid var(--line);gap:25px}.brand{display:block;width:163px;flex-shrink:0;line-height:0}.brand img{width:100%;height:auto;mix-blend-mode:multiply}.header-label{font-size:10px;letter-spacing:1.4px;border-left:1px solid #bbbdb5;padding-left:24px;font-weight:700;color:var(--muted)}.site-header nav{margin-left:auto;display:flex;align-items:center;gap:28px;font-size:12px}.site-header nav a span{margin-left:4px}.private-badge{font-size:11px;display:flex;gap:6px;align-items:center;background:#eeeee7;border:1px solid var(--line);padding:5px 10px;border-radius:3px}.private-badge svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:1.2}main{max-width:1290px;margin:0 auto;padding:0 30px}.intro{display:flex;align-items:flex-end;justify-content:space-between;padding:49px 0 45px;border-bottom:1px solid var(--line);gap:40px}.eyebrow{font-size:10px;letter-spacing:1.5px;font-weight:700;line-height:1.5}.intro .eyebrow{display:flex;align-items:center;gap:10px;margin-bottom:20px}.red-dash{width:21px;height:3px;background:var(--red);display:inline-block}h1{font-size:76px;font-weight:800;line-height:.99;letter-spacing:-3.7px}h1>span{color:var(--red)}.intro-aside{padding-bottom:4px;min-width:300px}.intro-aside>p{font-size:15px;color:#56574f;line-height:1.6}.collection-stats{display:flex;gap:26px;margin-top:24px;font-size:12px;color:var(--muted)}.collection-stats span+span{border-left:1px solid #cccdc3;padding-left:26px}.collection-stats strong{font-size:21px;display:inline-block;letter-spacing:-.6px;color:var(--ink);margin-right:4px}.workspace{display:grid;grid-template-columns:226px minmax(0,1fr);gap:47px;padding-top:36px;padding-bottom:55px}.sidebar-top{display:flex;justify-content:space-between;align-items:center;margin:3px 0 22px;color:var(--muted)}.small-arrow{font-size:17px;line-height:12px}.subjects{display:flex;flex-direction:column;gap:4px}.subject-button{border:1px solid transparent;background:transparent;width:100%;display:flex;gap:12px;align-items:center;text-align:left;font-size:13px;padding:11px 12px;border-radius:3px;min-height:45px;transition:background .12s}.subject-button:hover{background:#eeece5}.subject-button[aria-pressed=true]{background:var(--red);color:#fff}.subject-symbol{width:20px;text-align:center;font-size:16px;line-height:1;color:var(--muted);font-family:Georgia,'Times New Roman',serif}.subject-button[aria-pressed=true] .subject-symbol{color:#fff}.subject-count{margin-left:auto;font-size:11px;font-variant-numeric:tabular-nums;opacity:.75}.sidebar-note{border-top:1px solid var(--line);margin-top:30px;padding:26px 12px}.sidebar-note img{height:72px;width:72px;mix-blend-mode:multiply;display:block;transform:rotate(-5deg);margin:0 0 13px}.sidebar-note p{font-size:13px;color:#66675e;line-height:1.6}.text-button{border:0;background:transparent;padding:0;text-align:left;font-size:11px;text-decoration:underline;text-underline-offset:4px;text-decoration-color:#a7a79e}.text-button:hover{color:var(--red)}.sidebar-note .text-button{margin-top:17px}.collection-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin:0 0 22px}.collection-heading .eyebrow{font-size:9px;color:var(--muted);margin-bottom:5px}h2{font-size:30px;line-height:1.25;letter-spacing:-.9px}.heading-dot{color:var(--red)}.index-label{font-size:12px;color:var(--muted);padding-bottom:3px;white-space:nowrap}.filters{border:1px solid #d6d7cd;background:#fbfaf6;border-radius:4px}.search-wrap{display:flex;align-items:center;gap:12px;padding:0 17px;border-bottom:1px solid var(--line);height:53px}.search-wrap svg{stroke:#77786f;stroke-width:1.6;width:20px;height:20px}.search-wrap input{width:100%;height:100%;border:0;background:transparent;color:var(--ink);font-size:14px;min-width:0;outline-offset:-3px}.search-wrap input::placeholder{color:#828278}.search-wrap kbd{font-size:11px;font-family:var(--sans);color:#85867c;padding:0 5px;border:1px solid var(--line);border-radius:2px}.select-row{display:flex;align-items:center;min-height:68px;padding:12px 17px;gap:22px}.select-wrap{position:relative;min-width:150px}.select-wrap label{font-size:8px;letter-spacing:1.2px;font-weight:bold;color:var(--muted);display:block;margin-bottom:2px}.select-wrap label span{color:var(--muted);font-size:10px;margin-left:2px}.select-wrap select{width:100%;border:0;background:transparent;font-size:12px;padding:4px 24px 3px 0;color:var(--ink)}.select-wrap+.select-wrap{border-left:1px solid var(--line);padding-left:22px;min-width:173px}.reset-button{border:0;background:transparent;margin-left:auto;font-size:11px;padding:10px 0;color:var(--red);white-space:nowrap}.reset-button span{font-size:17px;padding-left:5px}.reset-button:disabled{color:#96978c}.active-filters{display:flex;flex-wrap:wrap;gap:7px}.active-filters:not(:empty){padding-top:14px}.filter-chip{font-size:11px;border:1px solid #d7c8c0;background:#f1e8e2;color:#813124;border-radius:3px;padding:4px 8px;display:inline-flex;gap:10px;align-items:center}.filter-chip span{font-size:15px;line-height:1}.results-label{display:flex;justify-content:space-between;color:var(--muted);font-size:8px;letter-spacing:1.3px;font-weight:bold;margin:27px 0 12px}.results-label>span:last-child{letter-spacing:.8px}.results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.resource-card{background:#fff;border:1px solid #ddddd4;border-radius:3px;padding:21px 23px 17px;display:flex;flex-direction:column;min-height:231px;position:relative;transition:border-color .13s,transform .13s}.resource-card:hover{border-color:#a5a69b;transform:translateY(-2px)}.card-top{display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted);margin-bottom:15px}.format{display:flex;align-items:center;gap:6px}.format svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.3}.format.notes{color:var(--blue)}.format.pdf{color:var(--orange)}.card-number{font-size:9px;font-variant-numeric:tabular-nums;color:#98998e;letter-spacing:1px}.resource-card h3{font-size:19px;font-weight:600;line-height:1.32;letter-spacing:-.4px;margin-bottom:16px;max-width:98%;overflow-wrap:anywhere}.card-tags{display:flex;gap:5px 9px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:10px;margin-top:auto;margin-bottom:19px}.card-tags .tag-separator{color:#babbb0}.level{display:inline-flex;align-items:center;gap:5px}.level-mark{display:inline-flex;gap:2px;align-items:flex-end;width:12px;height:10px}.level-mark i{width:2px;display:block;background:#d8d9d0}.level-mark i:nth-child(1){height:4px}.level-mark i:nth-child(2){height:7px}.level-mark i:nth-child(3){height:10px}.level-mark[data-level="Introductory"] i:first-child,.level-mark[data-level="Intermediate"] i:not(:last-child),.level-mark[data-level="Advanced"] i{background:#73796a}.card-bottom{padding-top:13px;border-top:1px solid #eeeeE7;display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:10px;color:var(--muted)}.resource-link{font-size:11px;color:var(--ink);font-weight:600;display:flex;align-items:center;gap:16px}.resource-link:hover{color:var(--red)}.resource-link span[aria-hidden]{font-size:17px;font-weight:400;line-height:1}.collection-footnote{font-size:10px;color:var(--muted);margin:24px 0 0;line-height:1.8}.collection-footnote .text-button{font-size:10px;margin-left:5px}.empty{grid-column:1/-1;text-align:center;border:1px dashed #c9cabe;padding:50px 20px 44px;border-radius:3px}.empty .empty-symbol{font-family:Georgia,serif;color:var(--red);font-size:38px;line-height:1;margin-bottom:18px}.empty h3{font-size:21px;letter-spacing:-.5px;margin-bottom:9px}.empty p{font-size:13px;color:var(--muted);max-width:340px;margin:0 auto 23px}.empty button{border:1px solid var(--ink);background:var(--ink);color:#fff;padding:9px 16px;font-size:12px;border-radius:3px}.loading{padding:40px 0;color:var(--muted);font-size:13px}.site-footer{max-width:1290px;padding:22px 30px 27px;margin:auto;display:flex;justify-content:space-between;gap:20px;font-size:9px;letter-spacing:.3px;border-top:1px solid var(--line);color:var(--muted)}.site-footer>span:first-child{font-weight:bold;color:#4c4e44;letter-spacing:1px}.footer-divider{color:#a8aaa0;margin:0 11px}dialog{width:min(580px,calc(100% - 32px));padding:29px 33px 33px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:5px;max-height:85vh;box-shadow:0 20px 90px #0002}dialog::backdrop{background:#20251e88;backdrop-filter:blur(2px)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;color:var(--muted)}.close-button{border:0;background:transparent;font-size:27px;line-height:1;padding:2px 4px}dialog h2{font-size:30px;margin:0 0 21px}dialog p:not(.eyebrow){font-size:13px;line-height:1.65;color:#585a50;margin-bottom:15px}dialog h3{font-size:14px;margin:22px 0 12px}.level-guide{display:grid;grid-template-columns:105px 1fr;gap:10px;font-size:12px;line-height:1.5;margin:0 0 20px}.level-guide dt{font-weight:600}.level-guide dd{margin:0;color:var(--muted)}.dialog-sources{border-top:1px solid var(--line);padding-top:20px;display:flex;gap:24px;font-size:12px;color:var(--red)}
@media(min-width:1500px){.site-header{padding-left:75px;padding-right:75px}}@media(max-width:1100px){main{padding:0 35px}.site-header{padding:0 35px}.workspace{grid-template-columns:190px minmax(0,1fr);gap:28px}.subject-button{font-size:12px;padding:10px 8px;gap:9px}.select-row{gap:15px}.select-wrap{min-width:120px}.select-wrap+.select-wrap{min-width:150px;padding-left:15px}.resource-card{padding:20px 18px 16px}.resource-card h3{font-size:18px}.card-tags{font-size:9px;gap:5px}.intro-aside{min-width:270px}.site-header nav{gap:20px}}@media(max-width:800px){.site-header{min-height:78px;padding:0 24px;gap:18px}.brand{width:140px}.header-label{font-size:9px;padding-left:18px;letter-spacing:1px}.site-header nav a{display:none}.site-header nav{gap:0}.private-badge{font-size:10px;padding:4px 8px}main{padding:0 24px}.intro{padding:34px 0;gap:25px}h1{font-size:60px;letter-spacing:-3px}.intro .eyebrow{font-size:9px;margin-bottom:17px}.intro-aside{min-width:215px}.intro-aside>p{font-size:13px}.collection-stats{gap:15px;font-size:10px}.collection-stats span+span{padding-left:15px}.collection-stats strong{font-size:18px}.workspace{grid-template-columns:1fr;gap:28px;padding-top:26px}.sidebar-top{margin-bottom:12px}.subjects{display:flex;flex-direction:row;flex-wrap:wrap;gap:6px}.subject-button{width:auto;border-color:var(--line);min-height:36px;padding:7px 10px;border-radius:3px;font-size:11px;gap:7px}.subject-symbol{width:14px;font-size:13px}.subject-count{font-size:10px;margin-left:6px}.sidebar-note{display:none}.small-arrow{display:none}.collection-heading{margin-bottom:19px}h2{font-size:28px}.collection-heading .eyebrow{font-size:8px}.site-footer{padding:20px 24px;flex-wrap:wrap}.resource-card{min-height:230px}.collection{scroll-margin-top:20px}}
@media(max-width:520px){.site-header{padding:0 20px;min-height:72px;gap:12px}.brand{width:125px}.header-label{font-size:8px;padding-left:13px;max-width:67px;line-height:1.5;letter-spacing:1px}.private-badge{font-size:9px;padding:4px 6px;gap:4px}main{padding:0 20px}.intro{display:block;padding:31px 0 26px}.intro .eyebrow{font-size:8px;letter-spacing:1.25px;margin-bottom:17px}h1{font-size:61px;letter-spacing:-3px}.intro-aside{display:flex;align-items:center;gap:18px;margin-top:24px;min-width:0}.intro-aside>p{font-size:11px;line-height:1.6;flex:1}.collection-stats{margin:0;gap:12px;font-size:9px}.collection-stats span{display:flex;flex-direction:column;line-height:1.5}.collection-stats strong{font-size:23px;margin:0}.collection-stats span+span{padding-left:12px}.workspace{padding-top:23px;gap:27px}.sidebar-top .eyebrow{font-size:8px}.subjects{gap:5px}.subject-button{font-size:10px;padding:7px 8px;gap:5px}.subject-symbol{font-size:13px}.subject-count{font-size:9px;margin-left:2px}.collection-heading{gap:10px}h2{font-size:27px}.index-label{font-size:10px}.search-wrap{height:49px;padding:0 12px;gap:9px}.search-wrap input{font-size:12px}.search-wrap kbd{display:none}.select-row{padding:10px 12px;gap:12px;flex-wrap:wrap;min-height:0}.select-wrap{flex:1;min-width:100px}.select-wrap+.select-wrap{min-width:134px;padding-left:12px}.select-wrap label{font-size:7px}.select-wrap select{font-size:11px}.reset-button{margin-left:0;width:100%;text-align:left;padding:5px 0 0;border-top:1px solid var(--line);font-size:10px}.reset-button span{font-size:14px}.results{grid-template-columns:1fr;gap:12px}.results-label{font-size:7px;margin-top:23px;letter-spacing:1px}.results-label>span:last-child{letter-spacing:.4px}.resource-card{min-height:218px;padding:20px 21px 17px}.resource-card h3{font-size:20px;max-width:95%;margin-bottom:20px}.card-tags{font-size:10px;gap:5px 8px}.card-top{font-size:10px;margin-bottom:16px}.card-bottom{font-size:10px}.resource-link{font-size:11px}.collection-footnote .text-button{margin-left:0;display:block}.site-footer{font-size:8px;gap:12px;padding:19px 20px}.site-footer>span:first-child{font-size:8px}.workspace{padding-bottom:35px}dialog{padding:24px}dialog h2{font-size:26px}.level-guide{grid-template-columns:90px 1fr;font-size:11px;gap:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}.resource-card:hover{transform:none}}
/* Original YouTube thumbnails; preserve portrait Shorts without stretching. */
.card-preview{display:block;margin:-21px -23px 18px;overflow:hidden;aspect-ratio:16/9;background:#eeede6;border-bottom:1px solid var(--line);border-radius:2px 2px 0 0;flex-shrink:0}
.card-preview img{display:block;width:100%;height:100%;object-fit:cover;transition:opacity .15s}
.card-preview:hover img{opacity:.9}
.short-preview{background:#1f211e}
.short-preview img{object-fit:contain}
.card-alias{font-size:11px;color:var(--muted);margin:-7px 0 15px;line-height:1.5}
@media(max-width:1100px){.card-preview{margin:-20px -18px 17px}}
@media(max-width:520px){.card-preview{margin:-20px -21px 18px}}
.topic-panel{margin:0 0 22px;padding:16px 17px 17px;border:1px solid var(--line);border-radius:4px;background:#f1f0e9}
.topic-panel[hidden]{display:none}
.topic-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;color:var(--muted)}
.topic-heading .eyebrow{font-size:8px;letter-spacing:1.2px}
.intro-contact{display:flex;align-items:center;flex-wrap:wrap;gap:8px 12px;margin-bottom:20px;font-size:12px;line-height:1.5;color:var(--muted)}
.intro-contact>a{white-space:nowrap}
.intro-contact>span{color:var(--red)}
.topic-heading>span{font-size:9px}
.topic-buttons{display:flex;flex-wrap:wrap;gap:7px}
.topic-button{display:inline-flex;align-items:center;gap:10px;min-height:34px;padding:7px 10px;border:1px solid #d5d6ca;background:#fbfaf7;border-radius:3px;font-size:11px;line-height:1.4}
.topic-button:hover{border-color:#a5a79b;background:#fff}
.topic-button[aria-pressed=true]{border-color:#bc8277;background:var(--red-pale);color:#862e24}
.topic-count{font-size:9px;font-variant-numeric:tabular-nums;opacity:.7}
@media(max-width:520px){.topic-panel{padding:13px 12px 14px;margin-bottom:18px}.topic-button{font-size:10px;gap:8px;padding:7px 8px;min-height:35px}.topic-buttons{gap:6px}.topic-heading .eyebrow{font-size:7px}.topic-heading>span{font-size:8px}}