/* Subject directories and readers use the same Rx Notes surfaces and typography. */
.academic-year-nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;padding:5px;background:var(--rx-tab);border-radius:14px;margin:0 0 14px}
.academic-year-nav a{display:flex;align-items:center;justify-content:center;min-height:48px;padding:7px 3px;border-radius:10px;font:700 15px/1.25 var(--rx-heading);color:var(--text);text-align:center}
.academic-year-nav a[aria-current=page]{background:var(--rx-blue);color:#fff;box-shadow:0 2px 7px #0769ce20}
.year-directory .year-essentials{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:22px}
.rx-inner .year-directory .year-essential{display:grid;grid-template-columns:30px minmax(0,1fr) 14px;align-items:center;gap:7px;padding:13px 11px;min-height:84px;border:1px solid var(--hairline);border-radius:16px;background:var(--rx-yellow);color:#101b43;box-shadow:var(--rx-shadow);margin:0}
.rx-inner .year-directory .reading-header>p{font:400 14px/1.5 var(--ui)}
.rx-inner .year-directory .year-outline-cta{background:var(--rx-peach)}
.year-essential .rx-row-icon{width:30px;height:34px;flex-basis:30px}.year-essential .rx-row-icon .icon-svg{width:23px;height:23px}
.year-essential>span:nth-child(2){min-width:0}.rx-inner .year-directory .year-essential strong{display:block;font:700 17px/1.2 var(--rx-heading)}
.year-essential small{display:block;font-size:12px;line-height:1.35;color:#475571;margin-top:5px}.year-essential>.icon-svg{width:15px;height:15px}
.year-directory-section>header{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:5px 10px;margin:0 2px 12px}
.rx-inner .year-directory-section h2{font:700 23px/1.2 var(--rx-heading);margin:0}
.rx-inner .year-directory-section>header p{font-size:13px;color:var(--muted);margin:0}
.academic-subject-list{list-style:none;padding:0;margin:0;display:grid;gap:11px}
.academic-subject-list>li{min-width:0;scroll-margin-top:16px}
.academic-subject-card{display:flex;align-items:center;gap:11px;min-height:92px;padding:16px 14px;background:var(--surface);border:1px solid var(--hairline);border-radius:18px;color:var(--text);box-shadow:var(--rx-shadow);transition:transform 150ms ease-out,border-color 150ms ease-out}
.academic-subject-card:hover{border-color:var(--line);transform:translateY(-1px)}.academic-subject-card:active{transform:translateY(1px)}
.academic-subject-card>.rx-row-icon{width:40px;height:44px;flex-basis:40px}.academic-subject-card>.rx-row-icon>.icon-svg{width:28px;height:28px}
.academic-subject-copy,.academic-subject-card>span:not(.rx-row-icon){display:block;min-width:0;flex:1}
.academic-subject-card strong{display:block;font:700 20px/1.25 var(--rx-heading);overflow-wrap:anywhere}
.academic-subject-card small{display:block;font-size:13px;line-height:1.4;color:var(--muted);margin-top:5px}
.academic-subject-copy>span{display:block;font-size:12px;line-height:1.35;color:var(--muted);margin-top:4px}
.academic-subject-card>.icon-svg{width:17px;height:17px;color:var(--text);margin-left:auto}

/* Subject readers: a single paper surface, compact units and direct course files. */
.subject-page{max-width:900px}
.subject-page .reading-header{padding:18px;border-radius:20px;margin-bottom:8px}
.subject-page .reading-header h1{font-size:26px;line-height:1.15}
.subject-page .reading-header p{font-size:14px;line-height:1.5;margin-top:10px}
.subject-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:0 3px;margin:0 0 10px;font-size:12px;color:var(--muted)}
.subject-outline-links a{display:inline-flex;align-items:center;gap:6px;min-height:48px;font-size:13px;font-weight:500;color:var(--rx-link)}
.subject-outline-links .icon-svg{width:17px;height:18px}
.subject-reader{padding:12px;background:var(--surface);border:1px solid var(--hairline);border-radius:20px;box-shadow:var(--rx-shadow);min-width:0}
.subject-reader [hidden]{display:none!important}
.reader-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;padding:4px;background:var(--rx-tab);border-radius:13px;position:sticky;top:8px;z-index:12}
.reader-tabs .reader-tab{display:flex;align-items:center;justify-content:center;min-width:0;min-height:48px;padding:7px 3px;border-radius:10px;font:600 13px/1.3 var(--ui);color:var(--text);transition:box-shadow 150ms ease-out,transform 150ms ease-out}
.reader-tabs .is-selected{background:var(--rx-blue);color:#fff;box-shadow:0 2px 6px #0769ce18}
.reader-search{width:100%;margin:12px 0 0}
.reader-search .inline-search{width:100%;max-width:none}
.reader-search input{font-size:14px;background:var(--rx-field)}
.reader-panel{scroll-margin-top:78px;min-width:0}
.js .reader-panel[data-selected=false]{display:none}
.reader-panel-heading{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin:18px 2px 10px}
.rx-inner .reader-panel-heading h2{font:700 19px/1.2 var(--rx-heading);margin:0;min-width:0}
.reader-panel-heading>p{font-size:12px;line-height:1.4;margin:0;color:var(--muted);text-align:right;flex-shrink:0}
.rx-inner .subject-page .subject-reader .reader-unit{border:0;border-radius:0;box-shadow:none;background:transparent;margin:0;overflow:visible;border-bottom:1px solid var(--hairline)}
.rx-inner .subject-page .subject-reader .reader-unit:last-child{border-bottom:0}
.rx-inner .subject-page .subject-reader .reader-unit>summary{display:flex;align-items:center;gap:9px;min-height:64px;padding:12px 2px;border:0;border-radius:0;background:transparent;color:var(--text);list-style:none}
.reader-unit>summary::-webkit-details-marker{display:none}
.rx-inner .subject-page .subject-reader .reader-unit>summary h3{display:grid;gap:4px;margin:0;flex:1;min-width:0;font:600 14px/1.45 var(--ui);letter-spacing:0;text-wrap:wrap}
.reader-unit-label{font:500 11px/1.2 var(--ui);text-transform:uppercase;letter-spacing:.055em;color:var(--muted)}
.reader-unit .group-count{font-size:12px;min-width:25px}
.reader-unit>summary>.icon-svg{width:16px;height:18px;transition:transform 180ms ease-out}
.reader-unit[open]>summary>.icon-svg{transform:rotate(90deg)}
.rx-inner .subject-page .subject-reader .reader-unit>.group-body{padding:0 0 5px 0;border-top:1px solid var(--hairline)}
.subject-reader .file-list{display:block;margin:0;padding:0}
.rx-inner .subject-page .subject-reader .file-row{display:grid;grid-template-columns:30px minmax(0,1fr) 64px;gap:8px;min-height:66px;padding:10px 0;background:transparent;border-color:var(--hairline);align-items:center}
.subject-reader .file-row:last-child{border-bottom:0}
.rx-inner .subject-page .subject-reader .file-title{min-width:0;padding:0;color:var(--text)}
.rx-inner .subject-page .subject-reader .file-title>span{font:500 14px/1.45 var(--ui);display:block;overflow-wrap:anywhere;white-space:normal;letter-spacing:0}
.rx-inner .subject-page .subject-reader .resource-source{font:400 11px/1.4 var(--ui);display:block;margin-top:4px;color:var(--muted)}
.rx-inner .subject-page .subject-reader .format-icon{width:30px;height:34px;font-size:9px;border-radius:9px}
.rx-inner .subject-page .subject-reader .file-open{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-width:64px;min-height:48px;padding:8px 6px;font:600 12px/1.2 var(--ui);background:var(--rx-blue);color:#fff;border-radius:10px}
.subject-reader .file-open .icon-svg{width:14px;height:16px}
.subject-reader .page-chunk>summary{font-size:13px;padding-inline:2px}
.reader-source-note{margin:12px 0 0;border-top:1px solid var(--hairline)}
.reader-source-note>summary{display:flex;justify-content:space-between;align-items:center;min-height:48px;gap:8px;font-size:12px;color:var(--muted);list-style:none;cursor:pointer}
.reader-source-note .icon-svg{width:14px;height:16px}.reader-source-note p{font-size:12px;line-height:1.5;color:var(--muted);padding:0 2px 8px}
.reader-book-note{font-size:13px;line-height:1.5;color:var(--muted);margin:0 2px 6px}
.subject-reader .year-book-list{display:block;list-style:none;margin:0;padding:0}
.subject-reader .year-book-list>li{padding:0;border-bottom:1px solid var(--hairline)}
.subject-reader .year-book-list>li:last-child{border-bottom:0}
.subject-reader .year-book-detail{border:0;margin:0}
.subject-reader .year-book-detail>summary{display:flex;align-items:center;gap:10px;padding:14px 2px;min-height:72px;list-style:none;cursor:pointer}
.subject-reader .year-book-detail>summary::-webkit-details-marker{display:none}
.subject-reader .year-book-detail .rx-row-icon{width:30px;height:36px;flex-basis:30px}
.subject-reader .year-book-detail .rx-row-icon .icon-svg{width:23px;height:24px}
.subject-reader .year-book-copy{min-width:0;flex:1;display:block}
.subject-reader .year-book-copy strong{display:block;font:600 14px/1.45 var(--ui);overflow-wrap:anywhere;letter-spacing:0}
.subject-reader .year-book-copy>span{display:block;font-size:12px;line-height:1.4;color:var(--muted);margin-top:4px}
.subject-reader .year-book-detail>summary>.icon-svg{width:15px;height:17px;margin-left:auto}
.subject-reader .year-book-guidance{font-size:13px;line-height:1.55;color:var(--muted);padding:0 2px 14px 42px}
.subject-reader .year-book-guidance p{margin:0 0 8px}
.subject-reader .year-book-empty{font-size:14px;line-height:1.5;color:var(--muted);padding:6px 2px 12px}
.reader-empty{padding:24px 6px 12px}.reader-empty strong{font-size:16px}.reader-empty p{font-size:14px;line-height:1.5;color:var(--muted);margin:6px 0 10px}
.subject-reader .empty-state{border:0;padding:18px 2px 12px}.subject-reader .empty-state>strong{font-size:20px}.subject-reader .empty-state p{font-size:14px}
.subject-study-guide{margin-top:16px;border-block:1px solid var(--hairline)}
.subject-study-guide>summary{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:52px;list-style:none;font-size:14px;font-weight:500;cursor:pointer}
.subject-study-guide .icon-svg{width:16px;height:18px}.subject-study-guide ul{padding:0 0 0 23px;font-size:14px;line-height:1.6;color:var(--muted)}
.subject-study-guide p{font-size:14px;line-height:1.6;color:var(--muted);margin:12px 0}
.subject-bottom-nav{display:flex;align-items:center;flex-wrap:wrap;justify-content:space-between;gap:4px 14px;margin-top:10px}
.subject-bottom-nav a{display:inline-flex;align-items:center;gap:7px;min-height:48px;font-size:13px;color:var(--text)}
.subject-bottom-nav .icon-svg{width:18px;height:18px}
@media(min-width:600px){.academic-subject-list{grid-template-columns:repeat(2,minmax(0,1fr))}.academic-subject-list>li{display:flex}.academic-subject-card{width:100%}.year-directory .year-essential{min-height:90px;padding:16px;grid-template-columns:36px minmax(0,1fr) 18px;gap:10px}.subject-page .reading-header{padding:22px}.subject-page .reading-header h1{font-size:30px}.subject-reader{padding:18px 22px}.reader-tabs .reader-tab{font-size:14px}.rx-inner .reader-panel-heading h2{font-size:22px}.rx-inner .subject-page .subject-reader .file-row{grid-template-columns:34px minmax(0,1fr) 76px;gap:12px;min-height:70px}.rx-inner .subject-page .subject-reader .file-open{min-width:76px;font-size:13px}.rx-inner .subject-page .subject-reader .file-title>span,.rx-inner .subject-page .subject-reader .reader-unit>summary h3{font-size:15px}}
@media(prefers-reduced-motion:reduce){.academic-subject-card,.reader-tab,.reader-unit>summary>.icon-svg{transition:none!important;transform:none!important}}

.reader-tab:active{transform:scale(.98)}