.ts-study{max-width:1560px;padding:26px 24px 64px;color:#17263b}
.ts-study-grid{display:grid;grid-template-columns:220px minmax(0,1fr) 260px;gap:24px;align-items:start}
.ts-study-main{min-width:0}.ts-study-nav,.ts-related{position:sticky;top:120px}
.ts-side-panel{background:#fff;border:1px solid #dce5e8;border-radius:14px;overflow:hidden;box-shadow:0 4px 18px #142c3f05}
.ts-mobile-nav>summary,.ts-side-title{display:flex;align-items:center;gap:9px;padding:18px 16px;margin:0;background:#f2f8f7;font-size:14px;line-height:1.5;font-weight:750;color:#123f3d}
.ts-mobile-nav>summary{list-style:none;cursor:pointer}.ts-mobile-nav>summary::-webkit-details-marker{display:none}.ts-mobile-nav>summary i:last-child{margin-left:auto}
.ts-side-body{padding:14px 10px 16px}.ts-browse-link{display:flex;align-items:center;justify-content:space-between;gap:5px;padding:0 7px 15px;font-size:12px;font-weight:650;color:#0d756e;text-decoration:none}
.ts-side-label{font-size:10px;letter-spacing:.09em;text-transform:uppercase;font-weight:750;color:#627786;margin:17px 8px 8px}
.ts-side-links{display:grid;gap:4px}.ts-side-links>a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:#354b60;font-size:13px;text-decoration:none;line-height:1.5}
.ts-side-links>a:hover{background:#f3f7f9;color:#0b6b64}.ts-side-links>a.active{color:#0c6c65;background:#e8f5f1;font-weight:750;box-shadow:inset 3px 0 #0f766e}
.ts-side-links small{display:block;font-size:11px;color:#617c82;font-weight:450;margin-top:2px}
.ts-chapter-header{padding:5px 0 16px;border-bottom:1px solid #dce5e8}.ts-study .ts-heading{font-size:clamp(25px,2.1vw,34px);line-height:1.25;letter-spacing:-.025em;color:#122039;margin:9px 0 12px;font-weight:800}
.ts-study .ts-eyebrow{font-size:11px;letter-spacing:.07em;color:#0c756e}.ts-chapter-description{font-size:14px;color:#52697b;line-height:1.65;margin:0 0 12px}
.ts-chapter-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;font-size:11px;color:#607386}.ts-chapter-meta span:first-child{color:#257068}.ts-chapter-meta i{margin-right:3px}
.ts-study .ts-actions{margin:20px 0 0;gap:10px}.ts-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;border:1px solid transparent;border-radius:9px;font-size:13px;font-weight:750;text-decoration:none;line-height:1.5;transition:background .15s,box-shadow .15s}
.ts-button i{font-size:17px}.ts-button-primary{background:#0f766e;color:#fff;box-shadow:0 4px 10px #0f766e1c}.ts-button-primary:hover{background:#0b615a;color:#fff;box-shadow:0 5px 14px #0f766e30}.ts-button-secondary{background:#fff;border-color:#b9cbd4;color:#213b50}.ts-button-secondary:hover{background:#f0f7f6;border-color:#0f766e;color:#0b655e}.ts-button[aria-busy=true]{opacity:.7;cursor:wait}
.ts-download-status{font-size:12px;color:#526b7c;margin:10px 0 0;line-height:1.5}.ts-download-status:empty{display:none}
.ts-study .ts-tabs{gap:7px;margin:20px 0 18px}.ts-study .ts-tab{font-size:12px;font-weight:650;border-radius:7px;padding:8px 11px;line-height:1.5;background:#f6f9fb;color:#385168}.ts-study .ts-tab.active{background:#0f766e;color:#fff}
.ts-exercise-heading{display:flex;align-items:baseline;flex-wrap:wrap;justify-content:space-between;gap:5px 12px;margin:0 0 14px}.ts-exercise-heading h2{font-size:18px;font-weight:750;color:#263c50;margin:0}.ts-exercise-heading>span{font-size:11px;color:#5c7486}
.ts-paper{background:#fff;border:1px solid #dbe3e8;border-radius:12px;box-shadow:0 6px 24px #16304707;overflow:hidden}
.ts-study .ts-question{margin:0;padding:26px 28px 28px;border-bottom:1px solid #e1e7ec}.ts-study .ts-question:last-child{border-bottom:0}
.ts-question-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px}.ts-question-number{background:#edf4f7;color:#244a60;font-size:12px;font-weight:800;border-radius:6px;padding:5px 9px;line-height:1.5}.ts-question-type{font-size:10px;letter-spacing:.06em;text-transform:uppercase;color:#617687;font-weight:650}
.ts-study .ts-content{font-family:Georgia,'Times New Roman',serif;font-size:17px;line-height:1.8;color:#182a3d;overflow-wrap:break-word}.ts-study .ts-content p{margin:0 0 13px;color:inherit;font-size:inherit;line-height:inherit}.ts-study .ts-content p:last-child{margin-bottom:0}.ts-study .ts-content strong,.ts-study .ts-content b{font-weight:600;color:#14253a}.ts-study .ts-question-text{margin-bottom:18px}.ts-study .ts-question-text>p:first-child{font-size:18px;font-weight:600}.ts-study .ts-content img{display:block;max-width:100%;height:auto;margin:14px 0}.ts-study .ts-content table{font-size:15px}.ts-study .ts-content sup,.ts-study .ts-content sub{font-size:.75em}
.ts-study .ts-option{gap:12px;align-items:center;margin:8px 0;padding:13px 15px;border-radius:8px;border-color:#cbd8e1;background:#fff;color:#21364b;transition:background .15s,border-color .15s}.ts-option>strong{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:28px;height:28px;border:1px solid #ccdae2;border-radius:50%;font-size:12px;font-weight:750}.ts-study .ts-option .ts-content{font-size:16px;flex:1;line-height:1.55}.ts-study .ts-option:hover{border-color:#739a9b;background:#f6faf9}.ts-study .ts-option.correct{border-color:#29916a;background:#edf9f2}.ts-study .ts-option.incorrect{border-color:#c46363;background:#fff5f4}.ts-option.correct>strong{background:#23875d;border-color:#23875d;color:#fff}.ts-option.incorrect>strong{background:#b84646;border-color:#b84646;color:#fff}.ts-option-state{font-size:20px}.ts-option.correct .ts-option-state{color:#23875d}.ts-option.incorrect .ts-option-state{color:#b84646}.ts-study .ts-result{font-size:12px;color:#405b6e;line-height:1.5;margin:10px 0}.ts-result:empty{display:none}
.ts-study .ts-reveals{margin-top:18px;display:grid;gap:10px}.ts-study .ts-question details{padding:0;margin:0;border:1px solid #cbdcd8;border-radius:8px;overflow:hidden;background:#fff}.ts-study .ts-question summary{display:flex;align-items:center;gap:8px;padding:12px 15px;list-style:none;font-family:inherit;font-size:13px;font-weight:750;color:#0b6c61;background:#f0f8f5;cursor:pointer;transition:background .15s}.ts-study .ts-question summary::-webkit-details-marker{display:none}.ts-study .ts-question summary:hover{background:#e4f3ed}.ts-study .ts-question summary>i:first-child{font-size:17px}.ts-toggle-chevron{margin-left:auto;font-size:17px;transition:transform .15s}.ts-study .ts-question details[open] .ts-toggle-chevron{transform:rotate(180deg)}.ts-open-label{display:none}.ts-study details[open] .ts-open-label{display:inline}.ts-study details[open] .ts-closed-label{display:none}
.ts-reveal-content{padding:20px 22px;border-top:1px solid #dbe9e3;background:#fcfefd}.ts-solution-label{font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:#23816a;font-weight:800;margin-bottom:14px}.ts-study .ts-answer summary{background:#f3f7fb;color:#345b77}.ts-study .ts-answer{border-color:#d0dce6}.ts-study .ts-answer .ts-reveal-content{background:#f9fbff;border-top-color:#d9e4ed}
.ts-side-title{font-size:14px;background:#fff;padding-bottom:5px}.ts-side-caption{font-size:11px;color:#607587;padding:0 16px 12px;margin:0;border-bottom:1px solid #e2e9ee}.ts-chapter-links{max-height:calc(100vh - 250px);overflow-y:auto;padding:8px}
.ts-chapter-links>a,.ts-chapter-soon{display:flex;align-items:flex-start;gap:9px;padding:12px 9px;border-radius:8px;font-size:12px;line-height:1.55;color:#355067;text-decoration:none}.ts-chapter-index{font-size:10px;font-weight:750;flex-shrink:0;width:24px;text-align:center;padding:3px 0;background:#f0f4f6;border-radius:5px;color:#5d768a}.ts-chapter-links>a:hover{background:#f3f8f7}.ts-chapter-links>a.active{background:#e9f5f1;color:#08675f;font-weight:750}.ts-chapter-links>a.active .ts-chapter-index{background:#0f766e;color:#fff}.ts-chapter-links small{display:block;font-size:10px;color:#6c8493;font-weight:450;margin-top:3px}.ts-chapter-soon{color:#61768a}.ts-chapter-soon small{color:#8c9aa5}.ts-pagination{margin:22px 0}
.ts-study a:focus-visible,.ts-study button:focus-visible,.ts-study summary:focus-visible{outline:3px solid #63bbae;outline-offset:3px}
@media(min-width:1500px){.ts-study-grid{grid-template-columns:230px minmax(0,1fr) 280px;gap:28px}}
@media(max-width:1199px){.ts-study-grid{grid-template-columns:190px minmax(0,1fr);gap:20px}.ts-related{grid-column:2;position:static}.ts-chapter-links{max-height:340px}.ts-study{padding:24px 20px 48px}}
@media(max-width:767px){.ts-study-grid{grid-template-columns:minmax(0,1fr);gap:18px}.ts-study-nav,.ts-related{position:static;grid-column:1}.ts-study-nav{order:0}.ts-study-main{order:1}.ts-related{order:2}.ts-study{padding:20px 14px 40px}.ts-mobile-nav>summary{padding:13px 14px}.ts-side-body{padding:8px 10px 12px}.ts-side-links{grid-template-columns:repeat(2,minmax(0,1fr))}.ts-side-label{margin-top:12px}.ts-study .ts-heading{font-size:26px}.ts-study .ts-question{padding:22px 19px}.ts-study .ts-content{font-size:17px}.ts-study .ts-question-text>p:first-child{font-size:18px}.ts-chapter-header{padding-top:0}.ts-chapter-meta{font-size:10px}.ts-button{padding:10px 12px;font-size:12px}.ts-study .ts-tabs{overflow-x:auto;flex-wrap:nowrap;padding-bottom:3px}.ts-study .ts-tab{white-space:nowrap}.ts-reveal-content{padding:18px}.ts-chapter-links{max-height:none}.ts-study .ts-breadcrumb{font-size:12px;margin-bottom:18px}}
@media(prefers-reduced-motion:reduce){.ts-study *{transition:none!important}}
.ts-study{max-width:1360px}.ts-study-grid{grid-template-columns:minmax(0,1fr) 290px;gap:28px}.ts-related{display:grid;gap:16px;max-height:calc(100vh - 145px);overflow-y:auto;padding-bottom:2px}.ts-related .ts-chapter-links{max-height:none}.ts-study .ts-content{font-size:18px;line-height:1.85;color:#102134}.ts-study .ts-question-text>p:first-child{font-size:20px;line-height:1.65}.ts-study .ts-content strong,.ts-study .ts-content b{color:#091b30;font-weight:700}.ts-study .ts-eyebrow{font-size:12px}.ts-chapter-text{padding:26px 28px;margin:22px 0}.ts-chapter-quiz{margin:26px 0}.ts-study .ts-question-type{color:#455d70;font-size:11px}.ts-related .ts-side-links>a{font-size:14px}.ts-related .ts-side-label{color:#466073}
@media(max-width:1199px){.ts-study-grid{grid-template-columns:minmax(0,1fr) 250px;gap:22px}.ts-related{grid-column:auto;position:sticky;top:110px}}
@media(max-width:767px){.ts-study-grid{grid-template-columns:minmax(0,1fr);gap:20px}.ts-related{grid-column:1;position:static;max-height:none;overflow:visible}.ts-study .ts-content{font-size:17px}.ts-study .ts-question-text>p:first-child{font-size:18px}.ts-chapter-text{padding:22px 19px}}
/* Match the public package-page cards and actions. */
.ts-study{max-width:1520px;padding:30px 24px 64px;color:#102238}
.ts-study-grid{grid-template-columns:minmax(0,1fr) 360px;gap:28px}
.ts-study-main{border:1px solid #b7cdd4;border-radius:18px;background:#fff;overflow:hidden}
.ts-chapter-header{background:#edf5f5;padding:26px 28px;border-bottom:1px solid #c4dadd}
.ts-study .ts-heading{font-size:28px;line-height:1.35;letter-spacing:-.02em;margin:8px 0 10px}
.ts-chapter-description{font-size:16px;color:#30485e;margin-bottom:0}
.ts-study .ts-actions{margin:20px 0 0;gap:12px}
.ts-study .ts-button{font-size:15px;padding:13px 19px;border-radius:12px;min-height:48px}
.ts-study .ts-button-primary{background:#107b76;color:#fff}
.ts-study .ts-button-secondary{background:#f47d10;border-color:#f47d10;color:#fff;box-shadow:0 8px 18px #f47d1020}
.ts-study .ts-button-secondary:hover{background:#dc6905;border-color:#dc6905;color:#fff}
.ts-study .ts-tabs{padding:20px 26px;margin:0;border-bottom:1px solid #d5e2e6;gap:9px}
.ts-study .ts-tab{font-size:14px;padding:10px 15px;background:#fff;border-color:#b7cdd4;border-radius:10px;color:#30485e}
.ts-study .ts-tab.active{background:#107b76;border-color:#107b76;color:#fff}
.ts-exercise-heading{padding:18px 28px;margin:0;background:#f5f7f8;border-bottom:1px solid #ccd8de;align-items:center}
.ts-exercise-heading h2{font-size:20px;color:#122338}
.ts-exercise-heading>span{font-size:13px;color:#526779}
.ts-paper{border:0;border-radius:0;box-shadow:none}
.ts-study .ts-question{padding:28px;border-bottom:1px solid #c9dde1;background:#fff}
.ts-study .ts-question:nth-child(even){background:#f0f6f6}
.ts-study .ts-content{font-family:inherit;font-size:18px;line-height:1.8;color:#152b40}
.ts-study .ts-question-text>p:first-child{font-size:19px;font-weight:600;line-height:1.7}
.ts-study .ts-content strong,.ts-study .ts-content b{font-weight:650}
.ts-question-number{background:#e4f0f0;color:#086d68;border:1px solid #c8dddd;border-radius:20px;padding:6px 12px;font-size:13px}
.ts-study .ts-question-type{font-size:12px;letter-spacing:0;text-transform:none}
.ts-study .ts-question summary{padding:13px 17px;font-size:15px;background:#107b76;color:#fff}
.ts-study .ts-question summary:hover{background:#086760}
.ts-study .ts-question details{border-radius:10px;border-color:#b8d0cf}
.ts-study .ts-answer summary{background:#e7f1f3;color:#173e51}
.ts-study .ts-answer summary:hover{background:#d9e9ed}
.ts-reveal-content{background:#fff;padding:24px}
.ts-related{position:static;max-height:none;overflow:visible;gap:20px}
.ts-side-panel{border:1px solid #b7cdd4;border-radius:18px;box-shadow:none;padding:22px}
.ts-mobile-nav>summary,.ts-side-title{padding:0;background:#fff;font-size:21px;color:#102238;line-height:1.4}
.ts-side-body{padding:0}.ts-sidebar-copy{font-size:15px;line-height:1.65;color:#30485e;margin:10px 0 18px}
.ts-browse-link{font-size:14px;padding:0 0 8px}.ts-side-label{font-size:11px;margin:18px 0 10px;color:#087b76}
.ts-side-links{gap:10px}.ts-related .ts-side-links>a{border:1px solid #b7cdd4;background:#f4f9f9;border-radius:12px;padding:13px 14px;font-size:15px;font-weight:650;color:#102238}
.ts-side-links>a.active{background:#e8f4f2;box-shadow:none;border-color:#107b76}
.ts-side-links>a>i{background:#e1eeee;border-radius:10px;padding:10px;color:#087b76;font-size:20px}
.ts-side-caption{padding:8px 0 16px;font-size:14px;border:0}
.ts-chapter-links{padding:0;display:grid;gap:10px}
.ts-chapter-links>a,.ts-chapter-soon{padding:14px 12px;border:1px solid #c5d8de;border-radius:12px;background:#f4f9f9;font-size:14px;gap:12px}
.ts-chapter-index{width:32px;padding:6px 0;font-size:12px;border-radius:8px;background:#e2eeee}
.ts-chapter-links small{font-size:11px}.ts-pagination{padding:0 26px}
.ts-chapter-text{margin:0;padding:28px;border-bottom:1px solid #d5e2e6}.ts-chapter-quiz{margin:0}
@media(max-width:1199px){.ts-study-grid{grid-template-columns:minmax(0,1fr) 300px;gap:22px}.ts-side-panel{padding:20px}.ts-related{position:static}}
@media(max-width:900px){.ts-study-grid{grid-template-columns:minmax(0,1fr)}.ts-related{grid-column:1}.ts-study{padding:22px 16px 48px}}
@media(max-width:767px){.ts-chapter-header{padding:22px 20px}.ts-study .ts-heading{font-size:25px}.ts-study .ts-question{padding:23px 20px}.ts-study .ts-content{font-size:17px}.ts-study .ts-question-text>p:first-child{font-size:18px}.ts-study .ts-tabs{padding:16px 20px}.ts-exercise-heading{padding:16px 20px}.ts-study .ts-button{font-size:14px;padding:12px 15px}.ts-reveal-content{padding:20px}.ts-side-links{grid-template-columns:1fr}}
/* Keep action labels readable in every link state. */
.ts-study .ts-actions a.ts-button-primary:link,.ts-study .ts-actions a.ts-button-primary:visited,.ts-study .ts-actions a.ts-button-primary:hover,.ts-study .ts-actions a.ts-button-primary:focus,.ts-study .ts-actions a.ts-button-primary:active{color:#fff!important}
.ts-study .ts-actions a.ts-button-primary:hover,.ts-study .ts-actions a.ts-button-primary:focus{background:#086760}
.ts-study .ts-question .ts-solution summary{background:#edf6f4;color:#17675f}
.ts-study .ts-question .ts-solution summary:hover,.ts-study .ts-question .ts-solution summary:focus-visible{background:#dfefea;color:#10564e}
/* Use one consistent question surface instead of alternating row colors. */
.ts-study .ts-question,.ts-study .ts-question:nth-child(even){background:#fff}
.ts-study .ts-question .ts-solution .ts-reveal-content{background:#fff}

/* Scope reading typography to chapter content so site navigation stays consistent. */
.ts-study .ts-content{font-family:Arial,Helvetica,sans-serif;font-size:18px;line-height:1.75;font-weight:400}
.ts-study .ts-question-text>p:first-child{font-size:inherit;font-weight:500;line-height:inherit}
.ts-study .ts-question-text strong,.ts-study .ts-question-text b{font-weight:500}
.ts-study .ts-content h4,.ts-study .ts-content h5,.ts-study .ts-content h6{font-size:inherit;line-height:inherit}
@media(max-width:767px){.ts-study .ts-content{font-size:17px}}

/* Question prompts are compact and bold; worked solutions retain regular reading text. */
.ts-study .ts-question-text,.ts-study .ts-question-text>p:first-child{font-size:17px;font-weight:700;line-height:1.65}
.ts-study .ts-question-text strong,.ts-study .ts-question-text b{font-weight:700}
.ts-study .ts-reveal-content .ts-content{font-size:17px;font-weight:400;line-height:1.75}
@media(max-width:767px){.ts-study .ts-question-text,.ts-study .ts-question-text>p:first-child,.ts-study .ts-reveal-content .ts-content{font-size:16px}}