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.answer-note h2{font-size:1rem;line-height:1.65;font-weight:600;margin-bottom:14px}.mapped-options{display:grid;gap:6px}.mapped-option{display:flex;align-items:flex-start;text-align:left;gap:9px;width:100%;line-height:1.65;font-size:.9rem;border-radius:4px;padding:7px 9px;background:transparent;color:#586878;border:1px solid transparent}
.mapped-letter{font-size:.8rem;flex-shrink:0;font-weight:600;padding-top:2px}.option-symbol{margin-left:auto;flex-shrink:0;font-size:.8rem;opacity:.7;padding:2px 0 0 3px}.mapped-option.distractor-option:hover{background:#f4f6f9;color:var(--navy);border-color:var(--border)}
.mapped-option.linked-answer,.option.correct.linked-answer{background:var(--mark);border-color:var(--mark);color:#1a303b;font-weight:600}.linked-answer.linked-hover{border-color:var(--mark-edge);box-shadow:0 0 0 1px var(--mark-edge)}
.connection-peek{display:flex;align-items:center;justify-content:flex-start;gap:10px;text-align:left;background:var(--mark-soft);border-left:2px solid var(--mark-edge);padding:10px 12px;margin-top:13px;width:100%;line-height:1.65;font-size:.75rem;color:#314552}.connection-peek span{min-width:0}.connection-peek b{font-size:1rem;color:var(--mark-edge)}
.map-help{font-size:.8rem;color:var(--muted);line-height:1.8;padding:2px 5px}.study-footer{display:flex;justify-content:space-between;gap:12px;margin-top:23px;flex-wrap:wrap}.linked-marker{background:var(--mark);border-color:var(--mark-edge);color:#203644}.insert-preview[data-tone]{background:var(--mark-soft);border-color:var(--mark-edge);color:#243b4e}
dialog.connection-dialog{width:min(700px,calc(100% - 28px));padding:26px 30px;border-top:7px solid var(--mark);max-height:88vh;scrollbar-width:thin}.connection-dialog::backdrop{background:#11263860;backdrop-filter:blur(2px)}.connection-popup header{display:flex;align-items:center;gap:12px;margin:0 0 16px}.connection-popup header>span:last-child{font-size:.8rem;color:var(--muted)}.connection-popup h2{font-size:1.3rem;margin-bottom:17px}.connection-tabs{display:flex;gap:6px;padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:19px;flex-wrap:wrap}.connection-tabs button{padding:9px 12px;background:#f2f5f8;border-radius:5px;font-size:.875rem}.connection-tabs button.active{background:var(--mark);font-weight:600}.pair-label{display:block;font-size:.7rem;font-weight:700;letter-spacing:1px;color:var(--muted);margin-bottom:10px}
.pair-evidence{background:var(--mark-soft);border:1px solid var(--mark);border-radius:7px;padding:18px 20px}.pair-evidence p{font-family:'Literata',Georgia,serif;font-size:1rem;line-height:1.95;margin-bottom:10px}.pair-evidence p:last-child{margin:0}.pair-evidence .evidence-link{pointer-events:none}.pair-evidence .evidence-link sup{display:none}
.pair-arrow{font-size:1.7rem;text-align:center;color:var(--mark-edge);line-height:1.4;padding:5px}.pair-arrow span{font-size:.75rem;vertical-align:middle}.pair-answer{background:var(--mark);padding:16px 20px;border-radius:7px}.pair-answer .pair-label{color:#3c4a47}.pair-answer p{font-size:1.05rem;font-weight:600;line-height:1.7}.pair-explanation{padding:19px 0 15px}.pair-explanation b{font-size:.875rem}.pair-explanation p{font-size:.95rem;line-height:1.9;margin-top:7px}.pair-rule{display:flex;gap:12px;align-items:flex-start;background:#f2f5f8;border-radius:6px;padding:12px 15px;font-size:.85rem;line-height:1.7}.pair-rule b{white-space:nowrap}.popup-footer{display:flex;justify-content:flex-end;margin-top:20px}
.popup-option{border:1px solid var(--border);border-radius:7px;padding:14px 16px;margin-top:12px}.popup-option>div{display:flex;align-items:flex-start;gap:10px;font-size:.9rem;line-height:1.7}.popup-option>div>span:last-child{white-space:nowrap;margin-left:auto;font-size:.75rem;color:var(--ruby)}.popup-option p{font-size:.875rem;line-height:1.8;margin:10px 0 0;padding-top:9px;border-top:1px solid var(--border);color:#4b6072}.popup-option.popup-correct{background:var(--mark-soft);border-color:var(--mark)}.popup-option.popup-correct>div>span:last-child{color:#335b28}.popup-option.chosen-trap{border-left:4px solid var(--ruby);background:#fff5f7}.trap-intro{font-size:.875rem;line-height:1.8;color:var(--muted)}.context-note{border-left:4px solid #d770d2;padding-left:20px}.context-label{display:inline-block;background:#efb6ef;color:#65296b;font-size:.75rem;font-weight:600;padding:6px 9px;margin-bottom:18px}
@media(max-width:1150px){.connection-legend p{width:100%;margin:0}.linked-grid .document{padding:23px;font-size:1rem}.answer-note{padding:18px}.connection-peek{flex-wrap:wrap}}
@media(max-width:680px){.connection-legend{gap:12px;padding:15px}.connection-legend p{font-size:.8rem}.linked-grid>.paper{position:static;max-height:none;overflow:visible}.linked-grid .paper-top{position:static}.linked-grid .document{padding:24px 21px;line-height:2}.answer-note{padding:19px}.mapped-option{font-size:1rem;padding:9px 8px}.connection-peek{font-size:.8rem}.evidence-link{padding:.06em .08em}.color-key{padding:9px 11px}.study-footer{display:grid;grid-template-columns:1fr 1fr}.study-footer>.primary{order:3;grid-column:1/-1}dialog.connection-dialog{padding:22px 20px;max-height:90vh}.connection-tabs{gap:5px}.connection-tabs button{padding:9px 8px;font-size:.8rem}.pair-evidence,.pair-answer{padding:15px}.popup-option{padding:12px}.popup-option>div{flex-wrap:wrap}.popup-option>div>span:nth-child(2){flex:1}.connection-popup h2{font-size:1.2rem}.connection-peek span{overflow-wrap:anywhere}}
@media(max-width:680px){.nav{display:grid;grid-template-columns:1fr 1fr;gap:5px}.nav button{flex-direction:row;justify-content:flex-start;padding:10px;font-size:.875rem}.modes button{font-size:.875rem;padding:9px 10px}.mobile-target{display:flex;align-items:flex-start;gap:10px;background:#fff;border:1px solid var(--border);border-left:3px solid var(--ruby);border-radius:7px;padding:13px;margin-bottom:16px}.mobile-target p{font-size:.875rem;line-height:1.7;margin-top:4px}.mobile-target .secondary{flex-shrink:0;font-size:.8rem;padding:8px}.lesson-tools select{font-size:.875rem}.step small{font-size:.7rem}.option{font-size:1rem}}
/* The learning window stays on top without a backdrop or blocking the page. */
#detail.floating-detail{position:fixed;z-index:80;inset:auto;left:calc(100vw - 528px);top:90px;margin:0;box-sizing:border-box;width:min(510px,calc(100vw - 24px));height:min(620px,calc(100dvh - 32px));max-height:calc(100dvh - 32px);padding:7px;border:1px solid #fff;border-radius:25px;background:linear-gradient(135deg,#fffffff7,#faf0f7f7 48%,#edf5fcf7);box-shadow:inset 0 1px 0 #fff,0 18px 55px #263c5538,0 4px 14px #30456720;overflow:hidden;color:var(--navy)}
#detail.floating-detail[open]{display:flex;flex-direction:column}
#detail.floating-detail::backdrop{background:transparent;backdrop-filter:none}
.detail-window-bar{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-shrink:0;padding:2px 4px 7px 10px}
#detail-drag{display:none}
.floating-detail #detail-drag{display:flex;align-items:center;gap:9px;flex:1;min-height:42px;border-radius:12px;cursor:grab;touch-action:none;user-select:none;font-size:.875rem;color:#79657d}
#detail-drag>span:first-child{font-size:27px;color:#a18ba6}
.floating-detail.is-dragging #detail-drag{cursor:grabbing}
.detail-window-bar .dialog-close{position:static;float:none;display:grid;place-items:center;flex-shrink:0;width:40px;height:40px;margin:0;padding:0;border:1px solid white;border-radius:50%;background:#ffffffb8;box-shadow:0 2px 8px #65485c13;color:#8b3457;font-size:28px;line-height:1}
.detail-window-bar .dialog-close:hover{background:#ffe5f0}
.floating-detail #detail-body{overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#c6a7bf transparent;min-height:0;flex:1;padding:8px 19px 20px}
.floating-detail .connection-popup header{padding-right:0;margin-bottom:12px}
.floating-detail .connection-popup h2{font-size:1.2rem}
.floating-detail .connection-tabs{gap:5px;padding-bottom:12px;margin-bottom:16px}
.floating-detail .connection-tabs button{font-size:.875rem;padding:8px 10px}
.floating-detail .pair-evidence,.floating-detail .pair-answer{padding:15px}
.floating-detail .pair-explanation p,.floating-detail .detail-content p{font-size:1rem}
.floating-detail .pair-rule{align-items:flex-start;line-height:1.7}
.floating-detail .popup-footer{justify-content:flex-start;font-size:.8rem;line-height:1.7;color:var(--muted)}
.floating-detail .pair-label{font-size:.75rem}
.window-paused{padding:14px 2px}.window-paused p{line-height:1.9;color:var(--muted)}
@media(max-width:680px){#detail.floating-detail{width:calc(100vw - 24px);height:48dvh;max-height:calc(100dvh - 20px);border-radius:22px}.floating-detail #detail-body{padding:7px 13px 18px}.floating-detail .connection-tabs button{font-size:.8rem;padding:8px}.floating-detail .connection-popup h2{font-size:1.1rem}}
/* Full-width lesson layout and grouped question navigation. */
.shell.top-navigation-shell{display:block}
.top-navigation-shell main{max-width:none;padding:24px clamp(16px,2.2vw,40px) 40px}
.studio-header{display:flex;align-items:center;gap:20px;padding:13px clamp(16px,2.2vw,40px);background:#fff;border-bottom:1px solid #eadfce;flex-wrap:wrap}
.studio-brand{display:flex;align-items:baseline;gap:12px;white-space:nowrap}.studio-brand b{font-size:1rem;letter-spacing:1px;color:var(--ruby)}.studio-brand span{font-size:.875rem;color:var(--muted)}
.studio-menu{display:flex;gap:5px;flex-wrap:wrap;margin-left:auto}.studio-menu button{font-size:.875rem;padding:9px 12px;background:transparent;border-radius:7px;white-space:nowrap;color:var(--muted)}.studio-menu button:hover{background:#f7f0e7;color:var(--navy)}.studio-menu button.active{background:var(--ruby-soft);color:var(--ruby);font-weight:600}
.compact-progress{font-size:.8rem;color:var(--muted);white-space:nowrap}
.lesson-navigation{padding:13px clamp(16px,2.2vw,40px) 16px;background:#fffdf8;border-bottom:1px solid #e6d5b9;display:grid;gap:12px}
.lesson-navigation-part{display:grid;grid-template-columns:52px minmax(0,1fr);gap:12px;align-items:start}.part-label{font-size:.75rem;font-weight:700;color:#846735;line-height:44px;white-space:nowrap}
.lesson-number-scroll{overflow-x:auto;scrollbar-width:thin;scrollbar-color:#d2b779 transparent;padding:4px;margin:-4px;min-width:0}
.lesson-number-grid{display:grid;gap:7px;position:relative}.part-5-grid{grid-template-columns:repeat(15,minmax(56px,1fr))}.part-7-grid{grid-template-columns:repeat(10,minmax(82px,1fr))}
.lesson-number{position:relative;min-width:0;min-height:44px;padding:7px 6px;border:1px solid #e9c684;border-radius:10px;background:linear-gradient(120deg,#fffefb,#fff5df);box-shadow:0 2px 5px #744b1710;color:#333;font-size:1.05rem;line-height:1.4;font-weight:700;font-variant-numeric:tabular-nums;white-space:nowrap}
.lesson-number:hover{background:#ffebbb;border-color:#c39435}.lesson-number.selected{background:#b31137;border-color:#b31137;color:#fff;box-shadow:0 0 0 2px #fff9e8,0 0 0 4px #c4983b}
.lesson-number.attempted::after{content:'';position:absolute;left:9%;bottom:3px;width:calc(var(--completion)*.82);height:3px;background:#47815f;border-radius:2px}.lesson-number.selected.attempted::after{background:#ffe2a3}
.lesson-number.flagged::before{content:'';position:absolute;right:6px;top:5px;width:5px;height:5px;border-radius:50%;background:var(--ruby)}.lesson-number.selected.flagged::before{background:#fff0b6}
.within-passage-nav{display:flex;gap:12px;align-items:center;margin:0 0 18px}.within-passage-nav>span{font-size:.875rem;color:var(--muted)}
@media(max-width:1150px){.studio-header{gap:10px}.studio-menu{margin-left:0}.compact-progress{margin-left:auto}.lesson-navigation-part{grid-template-columns:44px minmax(0,1fr);gap:9px}.lesson-number{font-size:1rem}}
@media(max-width:680px){.studio-header{padding:12px 16px;gap:10px}.studio-brand{flex:1}.compact-progress{font-size:.75rem;order:2}.studio-menu{order:3;flex-basis:100%;display:grid;grid-template-columns:1fr 1fr;gap:4px}.studio-menu button{padding:8px 6px;text-align:left;font-size:.8rem}.lesson-navigation{padding:10px 16px 14px;gap:10px}.lesson-navigation-part{grid-template-columns:1fr;gap:5px}.part-label{line-height:1.4}.part-5-grid{grid-template-columns:repeat(15,minmax(56px,1fr))}.part-7-grid{grid-template-columns:repeat(5,minmax(78px,1fr))}.lesson-number{min-height:42px;font-size:.95rem}.top-navigation-shell main{padding:21px 16px 30px}.within-passage-nav{flex-wrap:wrap;gap:8px}}
/* Hover vocabulary: live annotations belong to the source word, not the image window. */
.reading-word{position:relative;display:inline-block;vertical-align:baseline;white-space:nowrap;line-height:1.35;cursor:pointer;max-width:100%;text-transform:none;letter-spacing:normal;font-weight:inherit}
.reading-word .reading-english{display:inline-block;transform-origin:center;cursor:inherit;text-decoration:underline;text-decoration-style:dotted;text-decoration-color:#9ba89a;text-underline-offset:4px;text-decoration-thickness:1px}
.reading-meaning,.reading-ipa{position:absolute;left:50%;transform:translateX(calc(-50% + var(--label-shift,0px)));visibility:hidden;opacity:0;pointer-events:none;z-index:12;width:max-content;white-space:normal;font-family:'Be Vietnam Pro',Arial,sans-serif;font-size:14px;font-weight:500;line-height:1.3;letter-spacing:0;text-align:center;padding:1px 4px;border-radius:3px;background:#fffffff2}
.reading-meaning{bottom:calc(100% + 2px);color:#12843c}
.reading-ipa{top:calc(100% + 2px);color:#c7193c}
.reading-word[data-revealed]{z-index:15}.reading-word[data-revealed] .reading-meaning,.reading-word[data-revealed] .reading-ipa{visibility:visible;opacity:1}
.reading-word[data-revealed] .reading-english{background:#fff1b7;border-radius:3px;text-decoration:none;box-shadow:0 0 0 2px #fff1b7}
.reading-word:focus-visible{outline:2px solid #c89836;outline-offset:3px;border-radius:2px}
.document:has(.reading-word) p,.linked-grid .document:has(.reading-word),.grammar-sentence:has(.reading-word){line-height:3.25}
.document h2:has(.reading-word),.document .doc-kicker:has(.reading-word){line-height:3}
.form-fields:has(.reading-word){line-height:3.4}.doc-meta:has(.reading-word){line-height:3.1}
.mapped-option:has(.reading-word),.option:has(.reading-word),.answer-note h2:has(.reading-word),.question-card h2:has(.reading-word),.quote:has(.reading-word){line-height:3}
.pair-evidence p:has(.reading-word),.pair-answer p:has(.reading-word),.popup-option [lang=en]:has(.reading-word),.vocab-row b:has(.reading-word){line-height:3.2!important}
.reading-vocabulary-picture[hidden]{display:none}
.reading-vocabulary-picture{position:fixed;z-index:110;overflow:hidden;border-radius:19px;background:#fff;box-shadow:0 12px 40px #142b4535;border:1px solid #ffffffa0;pointer-events:auto}
.reading-vocabulary-picture img{display:block;width:100%;height:100%;object-fit:contain}
.pair-evidence .reading-word{pointer-events:auto}
.vocabulary-help{display:block;margin-top:7px;font-size:.78rem;line-height:1.7;color:var(--muted)}
.vocabulary-help .meaning-key{color:#12843c}.vocabulary-help .ipa-key{color:#c7193c}
/* PDF-style notes stay beside the answer they explain, with no reveal step. */
.answer-bridge{display:flex;align-items:flex-start;gap:12px;margin:0 0 16px;padding:12px 16px;background:var(--mark-soft);border:1px solid var(--mark);border-left:5px solid var(--mark-edge);border-radius:10px;color:#183247;box-shadow:0 3px 0 var(--mark)}
.bridge-key{width:20px;height:20px;flex:0 0 20px;margin-top:5px;color:var(--mark-edge)}
.bridge-connection{min-width:0;display:flex;align-items:center;flex-wrap:wrap;gap:8px 12px;font-size:1.08rem;line-height:1.45}
.bridge-connection>strong{min-width:0;overflow-wrap:anywhere;font-weight:800}
.bridge-arrow{display:flex;align-items:center;justify-content:center;flex:0 0 30px;height:30px;border-radius:50%;background:var(--mark);color:#183247;font-size:1.35rem;line-height:1}
.annotated-option{padding:0 0 10px;margin-bottom:3px;border-bottom:1px solid #e8edf1}.annotated-option:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.annotated-option .mapped-option{font-size:1rem;color:var(--navy)}
.inline-answer-note{display:flex;align-items:flex-start;gap:8px;margin:2px 9px 0 30px;padding:3px 0 3px 10px;border-left:2px solid #e4c5ca;font-size:.9rem;line-height:1.65;color:#546373}
.inline-answer-note>b{flex-shrink:0;color:#b02846}.inline-answer-note.note-correct{border-color:var(--mark-edge);color:#263e4a}.inline-answer-note.note-correct>b{color:#29613d}
.annotated-option .option-symbol{font-weight:700;color:#b02846;opacity:1}.annotated-correct .option-symbol{color:#27563c}
.direct-connection .compact-connection{display:grid;gap:12px}
.direct-connection .pair-evidence,.direct-connection .pair-answer{padding:11px 13px;border-radius:6px}
.direct-connection .pair-label{font-size:.8rem;letter-spacing:.3px;margin-bottom:3px}
.direct-connection .pair-evidence p,.direct-connection .pair-answer p{margin:0;font-size:1rem}
.floating-detail .direct-connection .direct-reason{font-size:1rem;line-height:1.65;margin:0}
.direct-traps{display:grid;gap:0;border-top:1px solid #dfd8df}
.direct-trap{display:grid;grid-template-columns:35px minmax(0,1fr);gap:9px;padding:10px 0;border-bottom:1px solid #e6dfe7;align-items:start}
.direct-trap>b{font-size:.9rem;color:#ad263c;padding-top:2px}
.floating-detail .direct-trap p{font-size:.95rem;line-height:1.65;margin:0}
.direct-trap.chosen-trap{background:#fff0f4;box-shadow:inset 3px 0 #ad263c;padding-left:9px;padding-right:9px;border-radius:5px}
.mapped-option.distractor-option:not(button),.mapped-option.distractor-option:not(button):hover{cursor:default;background:transparent;border-color:transparent;color:var(--navy)}
.connection-target{outline:2px solid var(--mark-edge,#ad263c);outline-offset:4px;scroll-margin:24px}
.reviewed-answer-option .inline-answer-note{margin-top:5px;margin-bottom:4px}
.direct-vocab{padding-top:3px;color:#536474}.direct-vocab>b{font-size:.875rem}.floating-detail .direct-vocab p{font-size:.875rem;line-height:2.8;margin-top:7px}.direct-vocab strong{font-weight:500;color:var(--navy)}
@media(max-width:680px){.inline-answer-note{margin-left:26px;font-size:.875rem}.answer-bridge{padding:10px 12px 13px}.bridge-connection{font-size:1rem;gap:7px 9px}.answer-note{padding:16px}.direct-trap{gap:6px}}
/* Two-row navigation puts the reading surface directly below the controls. */
.compact-studio .compact-toolbar{min-height:56px;padding:8px clamp(12px,2vw,28px);gap:18px;flex-wrap:wrap}
.compact-toolbar .studio-brand{gap:9px;margin-right:6px}.compact-toolbar .studio-brand b{font-size:1rem}.compact-toolbar .studio-brand span{font-size:.875rem}
.part-switch{display:flex;gap:2px;flex-shrink:0;background:#f0f3f6;border-radius:7px;padding:3px}
.part-switch button{background:transparent;border-radius:5px;padding:7px 12px;font-size:.875rem;white-space:nowrap;color:#596b7d}
.part-switch button.active{background:#162c43;color:white}
.compact-toolbar .toolbar-modes{margin-left:auto;align-self:center;border:0;background:#f0f3f6;padding:3px;flex-wrap:nowrap;gap:2px}
.compact-toolbar .toolbar-modes button{font-size:.875rem;white-space:nowrap;padding:7px 12px}.mode-short{display:none}
.learning-menu{position:relative;flex-shrink:0;z-index:125}.learning-menu summary{display:flex;align-items:center;gap:7px;list-style:none;cursor:pointer;border-radius:6px;padding:9px 8px;font-size:.875rem;white-space:nowrap;color:#4d6175}
.learning-menu summary::-webkit-details-marker{display:none}.learning-menu summary:hover,.learning-menu[open] summary{background:#fbedf0;color:#ad263c}.learning-menu summary:focus-visible{outline:2px solid #c4983b;outline-offset:2px}
.learning-menu-panel{position:absolute;right:0;top:calc(100% + 8px);width:245px;max-width:calc(100vw - 24px);padding:9px;background:white;border:1px solid #e1e5eb;border-radius:10px;box-shadow:0 10px 35px #162c4328}
.learning-menu-panel nav{display:grid;gap:3px}.learning-menu-panel nav button{background:transparent;text-align:left;padding:11px 12px;border-radius:5px;font-size:.9rem}.learning-menu-panel nav button:hover{background:#f3f5f8}.learning-menu-panel nav button.active{background:#fbedf0;color:#ad263c;font-weight:600}
.menu-brand{padding:9px 12px;font-size:.875rem;font-weight:600;color:#ad263c}.menu-progress{padding:12px;margin-top:6px;border-top:1px solid #e5e9ed;font-size:.875rem;color:#4d6175}.menu-progress small{display:block;font-size:.75rem;line-height:1.5;margin-top:5px}
.compact-studio .compact-lesson-navigation{display:block;padding:8px clamp(12px,2vw,28px) 10px;background:#fffdf8}
.compact-lesson-navigation .lesson-number-scroll{padding:4px;margin:-4px;overflow-x:auto}
.compact-lesson-navigation .lesson-number-grid{display:grid;grid-auto-flow:column;grid-template-columns:none;gap:6px}
.compact-lesson-navigation .part-5-grid{grid-auto-columns:minmax(44px,1fr)}.compact-lesson-navigation .part-7-grid{grid-auto-columns:minmax(78px,1fr)}
.compact-lesson-navigation .lesson-number{min-height:36px;padding:5px 8px;font-size:.95rem;border-radius:7px;box-shadow:none}
.compact-lesson-navigation .lesson-number.selected{box-shadow:0 0 0 2px #fff9e8,0 0 0 3px #c4983b}
.compact-studio main{padding:14px clamp(12px,2vw,28px) 30px}
.reading-paper-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 14px;padding:12px 18px}
.paper-identity{display:flex;align-items:center;gap:14px;flex-wrap:wrap;min-width:0}.strategy-mini{font-size:.875rem;line-height:1.5;color:#7b8793;text-transform:none;letter-spacing:0;font-weight:400;white-space:nowrap}
.reading-paper-top .number-nav{display:flex;gap:5px;flex-wrap:wrap;margin:0}.reading-paper-top .number-nav button{min-width:36px;min-height:34px;width:auto;padding:5px 8px;font-size:.875rem}
.reading-paper-top .number-nav .colored-question{background:var(--mark-soft);border:1px solid var(--mark);color:#263e4a}.reading-paper-top .number-nav .colored-question.current{background:var(--mark);border-color:var(--mark-edge)}
@media(max-width:900px){.compact-studio .compact-toolbar{gap:9px}.compact-toolbar .studio-brand span{display:none}.compact-toolbar .toolbar-modes button{padding:7px 9px}.reading-paper-top{padding:10px 13px}.paper-identity{gap:7px}}
@media(max-width:680px){.compact-studio .compact-toolbar{min-height:48px;padding:6px 10px;gap:6px;justify-content:space-between}.compact-toolbar .studio-brand{display:none}.compact-toolbar .toolbar-modes{margin:0}.compact-toolbar .toolbar-modes button{font-size:.875rem;padding:7px 8px}.mode-full{display:none}.mode-short{display:inline}.part-switch button{font-size:.875rem;padding:7px 8px}.learning-menu summary{font-size:.875rem;padding:8px 5px;gap:3px}.learning-menu summary>span{display:none}.compact-studio .compact-lesson-navigation{padding:7px 12px 9px}.compact-lesson-navigation .lesson-number{min-height:38px}.compact-studio main{padding:12px 12px 24px}.reading-paper-top{gap:7px}.paper-identity{flex:1}.strategy-mini{font-size:.875rem;flex-basis:100%}.reading-paper-top .number-nav button{min-height:36px}.reading-paper-top .number-nav{flex-shrink:0}}
@media(max-width:680px){.reading-meaning,.reading-ipa{font-size:13px}.reading-vocabulary-picture{border-radius:15px}}
/* Audio stays compact; spoken words use an outline so evidence colors remain visible. */
.passage-audio{display:flex;align-items:center;gap:8px;min-width:0}.reading-speaker{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;flex:0 0 36px;border:0;border-radius:50%;background:#ae1235;color:white;cursor:pointer;box-shadow:0 2px 5px #8f153625}.reading-speaker svg{width:19px;height:19px}.reading-speaker.audio-playing{background:#ffe65b;color:#162c43}.reading-speaker:focus-visible{outline:3px solid #162c43;outline-offset:3px}.passage-audio-progress{display:flex;align-items:center;gap:5px}.passage-audio-progress[hidden]{display:none}.passage-audio-progress input{width:clamp(60px,7vw,110px);accent-color:#ae1235}.passage-audio-time{font-size:.7rem;font-variant-numeric:tabular-nums;white-space:nowrap}.passage-audio-progress button{border:0;background:transparent;color:#ae1235;padding:6px;cursor:pointer}.karaoke-current{background:#ffe65b!important;color:#162c43!important;outline:2px solid #ae1235;outline-offset:2px;border-radius:2px;box-decoration-break:clone;-webkit-box-decoration-break:clone}.reading-paper-top{flex-wrap:wrap}.reading-paper-top .passage-audio{margin-left:auto}@media(max-width:480px){.passage-audio-time{display:none}.passage-audio-progress input{width:68px}}

.reading-speaker[hidden]{display:none}

.passage-audio .reading-speaker{background:#ae1235;color:#fff;font-size:1rem}.passage-audio .reading-speaker.audio-playing{background:#ffe65b;color:#162c43}
.passage-audio .passage-audio-time{display:inline-block}
@media(max-width:680px){.reading-paper-top .paper-identity{min-width:130px}.reading-paper-top:has(.passage-audio-progress:not([hidden])) .passage-audio{order:3;flex-basis:100%;margin-left:0}.passage-audio-progress{flex:1}.passage-audio-progress input{flex:1;width:70px;min-width:0}.passage-audio .passage-audio-time{font-size:.7rem}.reading-paper-top .number-nav{margin-left:auto}}
@media(max-width:480px){.passage-audio .passage-audio-time{display:none}}

.reading-word:active .reading-english{transform:scale(.96);background:#ffe08a;border-radius:3px}
@media(prefers-reduced-motion:reduce){.reading-word:active .reading-english{transform:none}}
/* Wrong options are visibly red before the learner reads the reason. */
.annotated-option.annotated-wrong,.reviewed-answer-option.annotated-wrong{background:#fff0f2;border:0;border-left:3px solid #bd2846;border-radius:8px;padding:6px 8px 10px;margin:8px 0}
.annotated-wrong .mapped-option.distractor-option:not(button),.annotated-wrong .mapped-option.distractor-option:not(button):hover,.annotated-wrong .option{color:#8c2340;background:transparent}
.annotated-wrong .mapped-letter,.annotated-wrong .letter{display:inline-flex;align-items:center;justify-content:center;min-width:27px;height:27px;padding:0 5px;border-radius:6px;background:#b42342;color:#fff;font-size:.85rem;line-height:1}
.annotated-wrong .option-symbol{font-size:1.15rem;color:#b42342;padding-top:0}
.annotated-wrong .inline-answer-note{color:#8c2340;border-left:0;margin:0 5px 0 33px;padding:2px 0;font-size:.9rem;line-height:1.6}
.inline-answer-note strong{font-weight:800}.note-trap strong{color:#a01836}
.annotated-wrong .inline-answer-note>b{display:none}
@media(max-width:680px){.annotated-option.annotated-wrong,.reviewed-answer-option.annotated-wrong{padding:5px 6px 8px}.annotated-wrong .inline-answer-note{margin-left:32px}}

/* Temporary red correspondence, independent of persistent answer colors. */
::highlight(wrong-answer-link){background-color:#b51f43;color:#fff;text-decoration:underline;text-decoration-color:#fff}
.annotated-wrong.trap-hover{box-shadow:inset 0 0 0 2px #b51f43;background:#ffe5eb}
.annotated-wrong[data-option-note]{transition:background-color .15s,box-shadow .15s}
.annotated-wrong[data-option-note]:focus-visible{outline:2px solid #b51f43;outline-offset:3px}
.trap-fallback{position:fixed;z-index:45;pointer-events:none;background:#ed6684;opacity:.4;mix-blend-mode:multiply;border-bottom:2px solid #b51f43}
@media(prefers-reduced-motion:reduce){.annotated-wrong[data-option-note]{transition:none}}

/* Keep the question's negation unmistakable, with one concise reminder. */
.question-not{display:inline-block;font-size:1.2em;font-weight:900;line-height:1.2;letter-spacing:.03em;color:#fff;background:#18743b;padding:.1em .24em;border-radius:.22em;box-shadow:0 0 0 3px #d6efc8;vertical-align:baseline;margin:0 .08em}
.negative-reminder{display:flex;align-items:baseline;gap:.45em;color:#226138;background:#eff9e9;border-radius:6px;padding:8px 10px;margin:-4px 0 16px;font-size:.9rem;line-height:1.55}
.negative-reminder>span:first-child{flex:none;color:#18743b;font-size:1.15em}
.negative-reminder strong{font-weight:800}

/* One vertical stream: main image, then every question in the passage. */
.study-layout{grid-template-columns:minmax(0,1.22fr) minmax(330px,1fr);gap:22px;align-items:start}
.study-answer-panel{min-width:0;display:flex;flex-direction:column;gap:14px}
.linked-grid.study-layout>.paper{position:sticky;top:12px;max-height:calc(100dvh - 24px);overflow:auto;overscroll-behavior:contain}
.study-answer-panel .answer-note{padding:16px 18px}
.study-answer-panel .answer-note h2{margin-bottom:12px}
.study-answer-panel .answer-bridge{padding:10px 12px;margin-bottom:12px}
.study-answer-panel .annotated-option{margin:6px 0;padding-top:4px;padding-bottom:6px}
.study-layout .document{padding:20px 24px}
.study-layout .message{padding:12px 14px;margin-bottom:10px}
.study-layout .message small{font-size:.8125rem;margin-bottom:3px}
.passage-scene{position:relative;margin:0;border-radius:14px;overflow:hidden;background:#fff;min-width:0}
.scene-image{aspect-ratio:2.4;width:100%;overflow:hidden}
.scene-image img{display:block;width:100%;height:100%;object-fit:cover}
.scene-image[hidden]{display:none}
@media(max-width:900px){.study-layout{gap:14px;grid-template-columns:minmax(0,1.1fr) minmax(300px,1fr)}.study-layout .document{padding:18px}}
@media(max-width:760px){.study-layout{display:flex;flex-direction:column;gap:14px}.linked-grid.study-layout>.paper{position:static;max-height:none;overflow:visible;width:100%}.study-answer-panel{width:100%}.study-layout .paper-top{position:static}.study-answer-panel .answer-note{padding:16px}}

/* A single compact row: identity, part switch, then the scrollable lesson list. */
.compact-studio .unified-toolbar{display:grid;grid-template-columns:auto auto minmax(0,1fr);align-items:center;gap:16px;min-height:62px;flex-wrap:nowrap;padding:7px clamp(12px,2vw,28px)}
.unified-toolbar .studio-brand{margin:0;flex:none}
.compact-studio .unified-toolbar .compact-lesson-navigation{min-width:0;padding:0 0 0 14px;background:transparent;border:0;border-left:1px solid #e2e7ed}
.unified-toolbar .compact-lesson-navigation .lesson-number-scroll{margin:0;padding:4px;overscroll-behavior-x:contain;scroll-padding-inline:4px}
.unified-toolbar .compact-lesson-navigation .lesson-number-grid{gap:6px}
.unified-toolbar .compact-lesson-navigation .part-7-grid{grid-auto-columns:minmax(80px,1fr)}
.unified-toolbar .compact-lesson-navigation .part-5-grid{grid-auto-columns:minmax(44px,1fr)}
.unified-toolbar .compact-lesson-navigation .lesson-number{min-height:36px;font-size:.875rem;padding:5px 8px}
@media(max-width:1100px){.compact-studio .unified-toolbar{gap:10px}.unified-toolbar .studio-brand span{display:none}.compact-studio .unified-toolbar .compact-lesson-navigation{padding-left:9px}}
@media(max-width:680px){.compact-studio .unified-toolbar{grid-template-columns:auto minmax(0,1fr);gap:6px;min-height:54px;padding:5px 8px}.compact-studio .unified-toolbar .compact-lesson-navigation{padding-left:5px}.unified-toolbar .part-switch button{min-height:38px;padding:6px 8px;font-size:.8125rem}.unified-toolbar .compact-lesson-navigation .lesson-number{min-height:38px}.unified-toolbar .compact-lesson-navigation .part-7-grid{grid-auto-columns:80px}}

/* Reclaim side space for reading while keeping answer text comfortably wide. */
.compact-studio main{padding-inline:12px}
.study-layout{gap:14px}
.study-layout .document{padding-inline:16px}
.study-answer-panel .answer-note{padding-inline:12px}
.study-answer-panel .answer-bridge{padding-inline:10px}
@media(min-width:1100px){.study-layout{grid-template-columns:minmax(0,1.4fr) minmax(440px,1fr)}}
@media(max-width:680px){.compact-studio main{padding-inline:8px}.study-layout .document{padding-inline:12px}}

/* Show every gloss in normal flow so adjacent meanings never cover each other. */
.reading-paper-top .gloss-toggle{border:1px solid #cad8cd;border-radius:7px;background:#f3faef;color:#22663b;padding:8px 10px;min-height:36px;font-size:.8rem;font-weight:600;white-space:nowrap}
.reading-paper-top .gloss-toggle[aria-pressed="true"]{background:#def1d1;border-color:#71a755;color:#174f2c}
.show-all-glosses .reading-word{display:inline-grid;grid-template-columns:minmax(0,1fr) auto;justify-items:center;vertical-align:middle;white-space:normal;max-width:min(100%,15rem);margin:.2em .1em;row-gap:2px}
.show-all-glosses .reading-meaning,.show-all-glosses .reading-ipa{position:static;inset:auto;transform:none;visibility:visible;opacity:1;width:auto;max-width:100%!important;min-width:0;z-index:auto;overflow-wrap:anywhere;font-size:13px;line-height:1.3;background:transparent;padding:0 2px}
.show-all-glosses .reading-english{grid-row:2;grid-column:1;max-width:100%;white-space:normal;overflow-wrap:anywhere}
.show-all-glosses .reading-meaning{grid-row:1;grid-column:1/-1}
.show-all-glosses .reading-ipa{grid-row:3;grid-column:1/-1}
.show-all-glosses .reading-word>.karaoke-word{grid-row:2;grid-column:2;align-self:center}

/* Compact player, opened explicitly from the passage speaker. */
.reading-audio-dock{position:fixed;z-index:45;box-sizing:border-box;bottom:max(12px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:min(380px,calc(100vw - 16px));padding:7px 8px;border:1px solid #d3ddd7;border-radius:16px;background:#fffffff7;box-shadow:0 6px 25px #162c4328;color:#162c43;backdrop-filter:blur(12px)}
.reading-audio-dock[hidden]{display:none}
.audio-dock-controls{display:flex;align-items:center;gap:5px}
.audio-dock-controls>button{display:inline-flex;align-items:center;justify-content:center;border:0;cursor:pointer;flex:0 0 34px;width:34px;height:36px;padding:0;border-radius:50%;background:#eef3f6;color:#284459;font-size:1.15rem}
.audio-dock-controls>button small{font-size:.6rem;margin-left:1px}
.audio-dock-controls>.reading-speaker{background:#ae1235;color:white;flex-basis:38px;width:38px;height:38px}
.audio-dock-controls>.reading-speaker.audio-playing{background:#ffe65b;color:#162c43}
.audio-dock-controls input{flex:1;min-width:36px;width:0;margin:0 3px;accent-color:#ae1235;cursor:pointer}
.audio-dock-controls>.audio-dock-drag{flex-basis:24px;width:24px;background:transparent;cursor:grab;touch-action:none;user-select:none;color:#7d8d98;font-size:1.4rem;border-radius:7px}
.reading-audio-dock.is-dragging .audio-dock-drag{cursor:grabbing}
.audio-dock-controls>.audio-dock-close{flex-basis:30px;width:30px;background:transparent;font-size:1.55rem}
.audio-dock-close:hover{background:#f8e8ed;color:#ae1235}
.audio-dock-modes{display:flex;align-items:center;justify-content:center;gap:4px;margin-top:3px;font-size:.72rem;color:#64748b}
.audio-dock-modes button{padding:4px 10px;border:1px solid transparent;border-radius:7px;background:transparent;color:#526679;font:inherit;cursor:pointer}
.audio-dock-modes button[aria-pressed="true"]{color:#174f2c;background:#e5f4dc;border-color:#a0c889;font-weight:600}
.reading-audio-dock :is(button,input):focus-visible{outline:3px solid #3271a4;outline-offset:2px}
body:has(.reading-audio-dock:not([hidden])) main{padding-bottom:100px}
body:has(.reading-audio-dock:not([hidden])) #passage{scroll-padding-bottom:100px}
body:has(.reading-audio-dock:not([hidden])) #passage .document{padding-bottom:100px}
.audio-seek-mode [data-audio-start]{cursor:pointer;border-radius:3px}
.audio-seek-mode [data-audio-start]:hover{background:#e4f3d8;box-shadow:0 0 0 2px #a0c889}
.audio-seek-mode [data-audio-start]:focus-visible{outline:2px solid #3271a4;outline-offset:2px}
.audio-seek-mode [data-audio-start]:active{background:#ffe65b}
@media(max-width:480px){.reading-audio-dock{bottom:max(8px,env(safe-area-inset-bottom))}.audio-dock-controls{gap:4px}}

/* Fixed liquid-glass studio header. The existing brand, part switcher, lesson
   buttons and their active states stay in the same DOM and keep their actions. */
html { scroll-padding-top: 132px; }
.shell.top-navigation-shell .studio-header {
  position: sticky;
  top: 0;
  z-index: 70;
  isolation: isolate;
  background: linear-gradient(180deg, rgba(255,255,255,.82), rgba(248,250,252,.72));
  border: 1px solid rgba(255,255,255,.9);
  border-top: 0;
  border-radius: 0 0 24px 24px;
  box-shadow: 0 16px 36px rgba(22,44,67,.14), inset 0 1px 0 rgba(255,255,255,.96);
  -webkit-backdrop-filter: blur(26px) saturate(1.32);
  backdrop-filter: blur(26px) saturate(1.32);
}
.shell.top-navigation-shell .studio-brand,
.shell.top-navigation-shell .part-switch,
.shell.top-navigation-shell .toolbar-modes,
.shell.top-navigation-shell .compact-progress { position: relative; z-index: 1; }
.shell.top-navigation-shell .lesson-navigation {
  background: rgba(255,253,248,.58);
  border-bottom-color: rgba(230,213,185,.72);
  -webkit-backdrop-filter: blur(18px) saturate(1.16);
  backdrop-filter: blur(18px) saturate(1.16);
}
.shell.top-navigation-shell .lesson-number {
  background: rgba(255,255,255,.76);
  border-color: rgba(233,198,132,.86);
  box-shadow: 0 5px 13px rgba(116,75,23,.1), inset 0 1px 0 rgba(255,255,255,.96);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.shell.top-navigation-shell .lesson-number:hover {
  background: rgba(255,235,187,.9);
  box-shadow: 0 7px 16px rgba(116,75,23,.14), inset 0 1px 0 #fff;
}
.shell.top-navigation-shell .lesson-number.selected {
  background: linear-gradient(180deg, rgba(255,255,255,.2), transparent 24%, transparent 74%, rgba(45,0,5,.2)), radial-gradient(120% 125% at 52% 38%, #cf1427 0%, #980010 54%, #690008 100%);
  border-color: #b31137;
  box-shadow: 0 8px 20px rgba(118,19,39,.24), 0 0 0 2px #fff9e8, 0 0 0 4px #c4983b;
}
@media (max-width: 680px) {
  html { scroll-padding-top: 116px; }
  .shell.top-navigation-shell .studio-header { border-radius: 0 0 20px 20px; }
}
@media (prefers-reduced-transparency: reduce) {
  .shell.top-navigation-shell .studio-header { background: #fff; -webkit-backdrop-filter: none; backdrop-filter: none; }
  .shell.top-navigation-shell .lesson-navigation,
  .shell.top-navigation-shell .lesson-number { -webkit-backdrop-filter: none; backdrop-filter: none; }
}
@media print {
  .shell.top-navigation-shell .studio-header { position: static; box-shadow: none; }
}

/* Pearl Glass workspace treatment. The existing DOM, controls and one-line
   navigation remain unchanged; this layer only refines the visual system. */
:root {
  --navy: #172c46;
  --muted: #6c7d90;
  --ruby: #b71942;
  --ruby-soft: #fff1f5;
  --paper: rgba(255,255,255,.68);
  --bg: #f2eee8;
  --border: rgba(255,255,255,.78);
  --gold: #bd9028;
  --green: #2f8b55;
  --shadow: 0 24px 58px rgba(61,47,43,.12), 0 5px 18px rgba(61,47,43,.08);
}

html { scroll-behavior: smooth; }
body {
  color: var(--navy);
  background:
    radial-gradient(900px 520px at 4% -8%, rgba(255,255,255,.95), transparent 70%),
    radial-gradient(760px 620px at 96% 12%, rgba(255,226,201,.54), transparent 72%),
    linear-gradient(145deg, #faf8f4 0%, #eee9e5 48%, #e4e7ed 100%);
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .5;
  background:
    radial-gradient(430px 280px at 22% 65%, rgba(255,255,255,.56), transparent 72%),
    radial-gradient(560px 360px at 76% 82%, rgba(255,255,255,.4), transparent 72%);
}
.shell.top-navigation-shell { min-height: 100vh; background: transparent; }
.compact-studio main {
  max-width: 1680px;
  margin: 0 auto;
  padding: 24px clamp(14px, 2.5vw, 42px) 50px;
}

/* The header deliberately stays a single desktop row. */
.compact-studio .unified-toolbar {
  min-height: 72px;
  padding: 8px clamp(14px, 2.5vw, 42px);
  gap: 14px;
  background: rgba(255,255,255,.58);
  border: 1px solid rgba(255,255,255,.88);
  border-top: 0;
  border-radius: 0 0 24px 24px;
  box-shadow: 0 18px 42px rgba(58,47,46,.14), inset 0 1px 0 rgba(255,255,255,.98);
  -webkit-backdrop-filter: blur(28px) saturate(1.35);
  backdrop-filter: blur(28px) saturate(1.35);
}
.compact-studio .unified-toolbar::after {
  content: "";
  position: absolute;
  inset: 0 18px auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.98), transparent);
  pointer-events: none;
}
.compact-studio .unified-toolbar .compact-lesson-navigation {
  border-left-color: rgba(164,143,136,.28);
  padding-left: 14px;
}
.compact-toolbar .studio-brand b { color: var(--ruby); letter-spacing: 1.1px; }
.compact-toolbar .studio-brand span { color: var(--muted); }
.compact-studio .unified-toolbar .part-switch,
.compact-studio .unified-toolbar .toolbar-modes {
  border: 1px solid rgba(255,255,255,.78);
  border-radius: 14px;
  padding: 3px;
  background: rgba(235,240,245,.64);
  box-shadow: inset 0 1px 2px rgba(52,70,87,.08), 0 2px 8px rgba(54,50,53,.05);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.compact-studio .unified-toolbar .part-switch button,
.compact-studio .unified-toolbar .toolbar-modes button {
  border-radius: 11px;
  transition: background .18s ease, box-shadow .18s ease, color .18s ease, transform .18s ease;
}
.compact-studio .unified-toolbar .part-switch button:hover,
.compact-studio .unified-toolbar .toolbar-modes button:hover { transform: translateY(-1px); }
.compact-studio .unified-toolbar .part-switch button.active,
.compact-studio .unified-toolbar .toolbar-modes button.active {
  background: linear-gradient(145deg, #203b59, #11253b);
  box-shadow: 0 5px 12px rgba(18,38,61,.2), inset 0 1px 0 rgba(255,255,255,.16);
}
.compact-lesson-navigation .lesson-number {
  border-color: rgba(226,190,119,.72);
  border-radius: 14px;
  background: rgba(255,255,255,.62);
  box-shadow: 0 5px 14px rgba(105,76,36,.08), inset 0 1px 0 rgba(255,255,255,.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
}
.compact-lesson-navigation .lesson-number:hover { transform: translateY(-1px); background: rgba(255,246,226,.9); }
.compact-lesson-navigation .lesson-number.selected {
  background: linear-gradient(180deg, #d22b4d 0%, #a70f31 62%, #850b27 100%);
  border-color: #ae173c;
  color: #fff;
  box-shadow: 0 8px 20px rgba(141,17,48,.26), 0 0 0 2px rgba(255,253,245,.98), 0 0 0 4px #c49a43;
}

/* Glass surfaces keep the reading and answer columns visually related. */
.study-layout { gap: 18px; }
.linked-grid.study-layout > .paper,
.study-answer-panel .passage-scene,
.study-answer-panel .answer-map,
.paper,
.question-card,
.connection-legend,
.strategy-card,
.review-row,
.empty,
.timer-setup,
.stats .stat,
.intro-box {
  background: rgba(255,255,255,.62);
  border: 1px solid rgba(255,255,255,.88);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.9);
  -webkit-backdrop-filter: blur(24px) saturate(1.18);
  backdrop-filter: blur(24px) saturate(1.18);
}
.linked-grid.study-layout > .paper {
  border-radius: 26px;
  overflow: hidden;
}
.study-answer-panel { gap: 14px; }
.study-answer-panel .answer-map { padding: 14px; border-radius: 26px; }
.study-answer-panel .passage-scene { padding: 10px; border-radius: 26px; }
.scene-image {
  border-radius: 20px;
  box-shadow: 0 9px 24px rgba(47,50,58,.16), inset 0 0 0 1px rgba(255,255,255,.72);
}
.reading-paper-top {
  padding: 14px 18px;
  background: rgba(255,255,255,.32);
  border-bottom: 1px solid rgba(194,178,171,.3);
}
.reading-paper-top .gloss-toggle,
.reading-paper-top .genre-note,
.reading-paper-top .reading-speaker,
.reading-paper-top .number-nav button {
  box-shadow: 0 4px 12px rgba(55,46,48,.08), inset 0 1px 0 rgba(255,255,255,.94);
}
.reading-paper-top .gloss-toggle {
  border-color: rgba(106,165,113,.55);
  border-radius: 12px;
  background: rgba(236,250,232,.78);
}
.reading-paper-top .reading-speaker {
  background: linear-gradient(145deg, #c62b52, #9e1234);
  box-shadow: 0 6px 14px rgba(159,18,52,.24), inset 0 1px 0 rgba(255,255,255,.26);
}
.reading-paper-top .reading-speaker.audio-playing { background: #ffe261; color: var(--navy); }
.study-layout .document { background: transparent; }
.linked-grid .paper-top { background: rgba(255,255,255,.36); }
.document { color: #2b3e53; }
.document p { text-wrap: pretty; }

/* Answer map: translucent ruby distractors, emerald correct state, champagne bridge. */
.study-answer-panel .answer-note {
  padding: 16px 18px;
  background: rgba(255,255,255,.44);
  border: 1px solid rgba(255,255,255,.8);
  border-top: 4px solid var(--mark);
  border-radius: 20px;
  box-shadow: 0 10px 24px rgba(58,47,45,.08), inset 0 1px 0 rgba(255,255,255,.88);
}
.answer-note h2 { color: var(--navy); }
.answer-bridge {
  background: linear-gradient(105deg, rgba(255,249,221,.88), rgba(255,244,188,.62));
  border-color: rgba(214,176,61,.56);
  border-left-color: #be9225;
  border-radius: 17px;
  box-shadow: 0 5px 14px rgba(170,125,23,.1), inset 0 1px 0 rgba(255,255,255,.88);
}
.annotated-option.annotated-wrong,
.reviewed-answer-option.annotated-wrong {
  background: linear-gradient(120deg, rgba(255,238,243,.9), rgba(255,247,248,.66));
  border: 1px solid rgba(222,149,169,.52);
  border-left: 3px solid #c21f48;
  border-radius: 18px;
  box-shadow: 0 7px 16px rgba(155,35,67,.08), inset 0 1px 0 rgba(255,255,255,.82);
}
.annotated-option.annotated-correct,
.reviewed-answer-option.annotated-correct {
  background: linear-gradient(120deg, rgba(226,250,228,.94), rgba(245,255,242,.7));
  border: 1px solid rgba(110,191,122,.58);
  border-left: 3px solid #3a9b55;
  border-radius: 18px;
  box-shadow: 0 7px 16px rgba(48,126,73,.1), inset 0 1px 0 rgba(255,255,255,.9);
}
.annotated-wrong .mapped-option.distractor-option:not(button),
.annotated-wrong .mapped-option.distractor-option:not(button):hover { color: #8e2945; }
.annotated-correct .mapped-option,
.annotated-correct .inline-answer-note { color: #245c3a; }
.annotated-option .mapped-option { border-radius: 12px; }
.annotated-option .mapped-letter {
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 30px;
  padding: 0;
  border-radius: 10px;
  background: rgba(255,255,255,.64);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.85);
}
.annotated-wrong .mapped-letter { color: #b71942; background: rgba(255,218,227,.8); }
.annotated-correct .mapped-letter { color: #197040; background: rgba(190,239,191,.9); }

/* Practice cards and supporting panels use the same frosted material. */
.question-card { border-radius: 24px; }
.option { background: rgba(255,255,255,.54); border-color: rgba(255,255,255,.82); border-radius: 16px; box-shadow: inset 0 1px 0 rgba(255,255,255,.7); }
.option.selected { background: rgba(231,240,249,.78); border-color: rgba(31,63,91,.44); }
.option.correct { background: rgba(224,249,228,.84); border-color: rgba(94,176,112,.7); }
.option.incorrect { background: rgba(255,231,237,.84); border-color: rgba(209,109,136,.62); }
.secondary { background: rgba(255,255,255,.6); border-color: rgba(255,255,255,.84); border-radius: 13px; box-shadow: 0 4px 11px rgba(50,47,50,.07); }
.primary { background: linear-gradient(145deg, #c52a50, #9f1236); border-radius: 13px; box-shadow: 0 7px 15px rgba(159,18,54,.18), inset 0 1px 0 rgba(255,255,255,.2); }
.reading-audio-dock {
  background: rgba(255,255,255,.7);
  border-color: rgba(255,255,255,.9);
  border-radius: 20px;
  box-shadow: 0 16px 42px rgba(47,42,43,.18), inset 0 1px 0 rgba(255,255,255,.95);
  -webkit-backdrop-filter: blur(26px) saturate(1.25);
  backdrop-filter: blur(26px) saturate(1.25);
}
dialog { background: rgba(255,255,255,.76); border-color: rgba(255,255,255,.9); border-radius: 24px; -webkit-backdrop-filter: blur(26px) saturate(1.2); backdrop-filter: blur(26px) saturate(1.2); }
dialog::backdrop { background: rgba(27,40,57,.38); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }

@media (max-width: 760px) {
  .compact-studio .unified-toolbar { min-height: 58px; border-radius: 0 0 20px 20px; }
  .compact-studio main { padding-inline: 10px; }
  .linked-grid.study-layout > .paper,
  .study-answer-panel .answer-map,
  .study-answer-panel .passage-scene,
  .question-card { border-radius: 20px; }
}
@media (prefers-reduced-transparency: reduce) {
  body { background: #f4f2ef; }
  body::before { display: none; }
  .compact-studio .unified-toolbar,
  .linked-grid.study-layout > .paper,
  .study-answer-panel .passage-scene,
  .study-answer-panel .answer-map,
  .paper,
  .question-card { background: #fff; -webkit-backdrop-filter: none; backdrop-filter: none; }
}
@media print {
  body { background: #fff; }
  body::before { display: none; }
  .compact-studio .unified-toolbar,
  .linked-grid.study-layout > .paper,
  .study-answer-panel .passage-scene,
  .study-answer-panel .answer-map,
  .paper,
  .question-card { background: #fff; box-shadow: none; -webkit-backdrop-filter: none; backdrop-filter: none; }
}

/* Let the reading document use normal page scrolling instead of an inner
   clipped rail, and keep its own toolbar below the fixed studio header. */
.linked-grid.study-layout > .paper {
  position: relative;
  top: auto;
  max-height: none;
  overflow: visible;
  overscroll-behavior: auto;
}
.linked-grid.study-layout .paper-top {
  top: 72px;
  background: rgba(255,255,255,.72);
  -webkit-backdrop-filter: blur(18px) saturate(1.16);
  backdrop-filter: blur(18px) saturate(1.16);
}

/* Inline evidence marks now round each fragment, including wrapped lines. */
.evidence-link,
.segment.evidence,
.segment.picked {
  background: var(--mark, #ffe66a);
  border-radius: .45em;
  padding: .05em .14em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.evidence-link { box-shadow: none; }

@media (max-width: 760px) {
  .linked-grid.study-layout > .paper {
    position: static;
    max-height: none;
    overflow: visible;
  }
  .linked-grid.study-layout .paper-top { position: static; }
}

/* Desktop study view: the answer/image column gets its own contained scroll
   surface, matching the listening workspace while the reading stays beside it. */
@media (min-width: 761px) {
  .study-layout {
    align-items: start;
  }
  .study-answer-panel {
    position: sticky;
    top: 86px;
    align-self: start;
    height: calc(100dvh - 102px);
    max-height: calc(100dvh - 102px);
    overflow-y: auto;
    overflow-x: visible;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: rgba(179,150,116,.72) transparent;
    scrollbar-gutter: stable;
    padding-right: 8px;
  }
  .study-answer-panel::-webkit-scrollbar { width: 8px; }
  .study-answer-panel::-webkit-scrollbar-track { background: transparent; }
  .study-answer-panel::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(197,158,74,.78), rgba(142,104,67,.58));
    border: 2px solid transparent;
    border-radius: 999px;
    background-clip: padding-box;
  }
  .study-answer-panel > .passage-scene,
  .study-answer-panel > .answer-map {
    flex: 0 0 auto;
  }
}
@media (max-width: 760px) {
  .study-answer-panel {
    position: static;
    height: auto;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }
}

/* Refined semantic accents: keep the status colors, remove the heavy rails. */
.answer-bridge {
  border-left-width: 1px;
  border-left-color: rgba(190,146,37,.58);
  box-shadow: 0 5px 14px rgba(170,125,23,.1), inset 0 1px 0 rgba(255,255,255,.88);
}
.annotated-option.annotated-wrong,
.reviewed-answer-option.annotated-wrong {
  border-left-width: 1px;
  border-left-color: rgba(194,31,72,.56);
  box-shadow: 0 7px 16px rgba(155,35,67,.08), inset 0 1px 0 rgba(255,255,255,.82);
}
.annotated-option.annotated-correct,
.reviewed-answer-option.annotated-correct {
  border-left-width: 1px;
  border-left-color: rgba(58,155,85,.62);
  box-shadow: 0 7px 16px rgba(48,126,73,.1), inset 0 1px 0 rgba(255,255,255,.9);
}
/* Main section switch and shared Part 5/7 navigation: fine liquid-glass edges. */
.shell.compact-studio .unified-toolbar .part-switch {
  gap: 5px;
  padding: 5px;
  border: 1px solid rgba(255,255,255,.92);
  border-radius: 22px;
  background: linear-gradient(135deg,rgba(255,255,255,.88),rgba(225,232,239,.64));
  box-shadow: inset 0 1px 0 #fff, inset 0 -1px 1px #bac5d144, 0 5px 16px #20374c16;
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  backdrop-filter: blur(18px) saturate(1.3);
}
.shell.compact-studio .unified-toolbar .part-switch button {
  min-height: 46px;
  padding: 10px 19px;
  border: 1px solid transparent;
  border-radius: 17px;
  font-size: 1.0625rem;
  font-weight: 750;
  color: #475a6c;
}
.shell.compact-studio .unified-toolbar .part-switch button.active {
  color: #fff;
  border-color: #ffffff79;
  background: linear-gradient(155deg,#df455e 0%,#bc1238 42%,#900925 100%);
  box-shadow: inset 0 1px 1px #ffffff70, inset 0 0 0 1px #ffffff18, 0 4px 10px #97103335;
  text-shadow: 0 1px 1px #690b2250;
}
.shell.top-navigation-shell :is([data-part="5"], [data-part="7"]) .lesson-number {
  border: 1px solid rgba(255,255,255,.96);
  background: linear-gradient(145deg,rgba(255,255,255,.92),rgba(235,239,243,.58));
  box-shadow: inset 0 1px 0 #fff, inset 0 -1px 1px #9baabb26, 0 3px 9px #23364b0e;
  color: #324252;
}
.shell.top-navigation-shell :is([data-part="5"], [data-part="7"]) .lesson-number:hover {
  background: linear-gradient(145deg,#fff,#f2f4f7);
  box-shadow: inset 0 1px 0 #fff, 0 4px 12px #293d541c;
}
.shell.top-navigation-shell :is([data-part="5"], [data-part="7"]) .lesson-number.selected {
  color: #fff;
  border: 1px solid #ffffffa8;
  background: linear-gradient(155deg,#dc4260 0%,#bd123c 38%,#920b2d 100%);
  box-shadow: inset 0 1px 1px #ffffff85, inset 0 0 0 1px #ffffff25, 0 3px 10px #a8143930;
}
.shell.top-navigation-shell .lesson-number-scroll:is([data-part="5"], [data-part="7"]) { scrollbar-color: #9ba8b580 transparent; }
.shell.compact-studio .unified-toolbar .part-switch button:focus-visible,
.shell.top-navigation-shell :is([data-part="5"], [data-part="7"]) .lesson-number:focus-visible {
  outline: 2px solid #436a92;
  outline-offset: 2px;
}
@media(max-width:680px) {
  .shell.compact-studio .unified-toolbar .part-switch { padding:4px;gap:3px;border-radius:18px; }
  .shell.compact-studio .unified-toolbar .part-switch button { min-height:40px;padding:8px 11px;font-size:.9375rem;border-radius:14px; }
}
@media(prefers-reduced-transparency:reduce) {
  .shell.compact-studio .unified-toolbar .part-switch { background:#eef2f6;-webkit-backdrop-filter:none;backdrop-filter:none; }
  .shell.top-navigation-shell :is([data-part="5"], [data-part="7"]) .lesson-number { -webkit-backdrop-filter:none;backdrop-filter:none; }
}

/* Keep the evidence connection inside its correct answer, as one card. */
.annotated-correct > .answer-bridge {
  margin: 5px 14px 0;
  padding: 10px 0 6px;
  gap: 9px;
  background: transparent;
  border: 0;
  border-top: 1px solid rgba(83,151,99,.22);
  border-radius: 0;
  box-shadow: none;
  color: #245c3a;
}
.annotated-correct > .answer-bridge .bridge-key { color: #39834d; }
.annotated-correct > .answer-bridge .bridge-connection { font-size: .95rem; gap: 5px 8px; }
.annotated-correct > .answer-bridge .bridge-arrow { flex-basis: 24px; height: 24px; font-size: 1.15rem; }
.annotated-correct:has(> .answer-bridge) > div[lang="vi"] .inline-answer-note {
  margin: 0 14px 8px;
  padding: 4px 0;
  border: 0;
}