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b{color:#f0d68e;font:700 43px DM Mono,monospace}.summary-big span{color:#bfd0df;font-size:11px}.summary-line{color:#b7cadb;border-bottom:1px solid #ffffff1a;justify-content:space-between;padding:12px 0;font-size:10px;display:flex}.summary-line b{color:#fff;font:500 11px DM Mono,monospace}.builder-summary .full{width:100%;margin-top:21px}.builder-summary>p{color:#91abc1;margin:11px 0 0;font-size:9px;line-height:1.7}.quiz-shell{max-width:1080px;margin:-8px auto 0}.quiz-topline{justify-content:space-between;align-items:center;gap:15px;margin-bottom:16px;display:flex}.back-button{color:var(--blue);background:0 0;border:0;font-size:11px;font-weight:800}.back-button:first-letter{font-size:17px}.quiz-heading{justify-items:center;gap:2px;display:grid}.quiz-heading span{color:var(--muted);font-size:10px}.quiz-heading b{color:var(--ink);font-size:13px}.quiz-actions{align-items:center;gap:12px;display:flex}.quiz-progress-text{color:var(--gold);font:500 12px DM Mono,monospace}.quiz-progress{background:#e9eef2;border-radius:6px;height:4px;margin-bottom:27px;overflow:hidden}.quiz-progress>span{border-radius:inherit;background:var(--gold);height:100%;transition:width .2s;display:block}.question-layout{direction:ltr;grid-template-columns:118px minmax(0,1fr);gap:30px;display:grid}.question-rail{direction:ltr;padding-top:9px}.rail-label{color:#a4b0bb;letter-spacing:1px;margin-bottom:12px;font:500 9px DM Mono,monospace;display:block}.rail-numbers{grid-template-columns:repeat(3,1fr);gap:5px;display:grid}.rail-numbers button{color:#abb7c1;background:0 0;border:0;border-radius:6px;padding:7px 0;font:500 10px DM Mono,monospace}.rail-numbers button:hover{color:var(--ink);background:#f1f5f8}.rail-numbers button.current{background:var(--blue);color:#fff}.rail-numbers button.answered:not(.current){color:var(--green);background:#ecf6f1}.rail-numbers small{color:#a7b3bd;grid-column:1/-1;margin-top:8px;font-size:9px}.rail-legend{color:#9aa7b2;gap:8px;margin-top:24px;font-size:9px;display:grid}.rail-legend span{align-items:center;gap:6px;display:flex}.legend-dot{border-radius:50%;width:6px;height:6px}.current-dot{background:var(--blue)}.done-dot{background:var(--green)}.question-main{direction:rtl;min-width:0;padding:7px 4% 0}.question-meta{justify-content:space-between;align-items:center;gap:15px;margin-bottom:19px;display:flex}.section-tag,.source-tag{color:var(--blue);background:#edf5fb;border-radius:6px;padding:5px 8px;font:500 9px DM Mono,monospace}.source-tag{color:#a77d26;background:#f8f5eb}.source-tag b{font-weight:500}.question-number{color:#c9d4dd;text-align:right;direction:ltr;font:500 14px DM Mono,monospace}.question-stem{max-width:780px;color:var(--ink);letter-spacing:-.4px;margin:8px 0 17px;font-size:clamp(20px,2.2vw,27px);font-weight:800;line-height:1.6}.multi-hint{color:var(--gold);margin:-8px 0 13px;font-size:10px;font-weight:700}.options-list{gap:8px;max-width:780px;display:grid}.option-row{border:1px solid var(--line);width:100%;color:var(--ink-soft);text-align:right;background:#fff;border-radius:11px;align-items:center;gap:13px;padding:13px 15px;transition:all .15s;display:flex}.option-row:hover{background:#fbfdff;border-color:#9fc2df}.option-row.picked{background:#f4f9fd;border-color:#9fc2df}.option-row.correct{background:#f0f9f4;border-color:#a7d6c1}.option-row.wrong{background:#fff6f4;border-color:#efb4ae}.option-bullet{color:#98a7b3;border:1px solid #ccd7df;border-radius:50%;flex:none;place-items:center;width:27px;height:27px;font:500 11px DM Mono,monospace;display:grid}.option-bullet.square{border-radius:6px}.picked .option-bullet{border-color:var(--blue);background:var(--blue);color:#fff}.correct .option-bullet{border-color:var(--green);background:var(--green);color:#fff}.wrong .option-bullet{border-color:var(--red);background:var(--red);color:#fff}.option-text{flex:1;font-size:12px;line-height:1.7}.option-status{color:var(--green);font-size:17px}.wrong .option-status{color:var(--red)}.answer-feedback{border-radius:10px;align-items:flex-start;gap:10px;max-width:780px;margin-top:16px;padding:12px 14px;display:flex}.answer-feedback>span{border-radius:50%;flex:none;place-items:center;width:23px;height:23px;font:700 12px DM Mono,monospace;display:grid}.answer-feedback b{font-size:11px}.answer-feedback p{margin:2px 0 0;font-size:10px}.answer-feedback.success{color:#2f755f;background:#edf8f2}.answer-feedback.success>span{background:#cbeada}.answer-feedback.error{color:#b4544f;background:#fff2f0}.answer-feedback.error>span{background:#f4d0ca}.answer-feedback.neutral{color:#7c8993;background:#f6f7f8}.answer-feedback.neutral>span{background:#e5ebef}.question-footer{border-top:1px solid var(--line);justify-content:space-between;max-width:780px;margin-top:30px;padding-top:17px;display:flex}.secondary-button{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:9px;padding:10px 15px;font-size:10px}.secondary-button:hover:not(:disabled){color:var(--ink);border-color:#b7c7d3}.result-wrap{place-items:center;min-height:65vh;display:grid}.result-card{border:1px solid var(--line);text-align:center;background:#fff;border-radius:20px;width:min(500px,100%);padding:39px}.result-card h2{margin:0 0 17px;font-size:25px}.score-ring{border:8px solid #e7f2ed;border-top-color:var(--gold);border-radius:50%;place-items:center;width:137px;height:137px;margin:0 auto 18px;display:grid}.score-ring b{color:var(--blue-deep);font:700 29px DM Mono,monospace}.score-ring span{color:var(--muted);margin-top:-30px;font-size:9px}.result-card p{color:var(--muted);font-size:11px}.result-card p strong{color:var(--ink)}.result-actions{justify-content:center;gap:9px;margin-top:24px;display:flex}.result-actions .ghost-button{border-color:var(--line);color:var(--ink-soft)}.lecture-intro{background:#fff;border:1px solid #e4ebf1;border-radius:15px;align-items:center;gap:15px;margin-bottom:34px;padding:19px 22px;display:flex}.lecture-intro-mark{background:var(--blue-deep);color:#e3c477;border-radius:13px;place-items:center;width:47px;height:47px;font:700 21px Georgia,serif;display:grid}.lecture-intro>div:nth-child(2){flex:1}.lecture-intro span{color:var(--gold);text-transform:uppercase;font:500 9px DM Mono,monospace}.lecture-intro h2{margin:0;font-size:17px}.lecture-intro p{color:var(--muted);margin:2px 0 0;font-size:10px}.compact-heading{margin-bottom:14px}.question-count{color:var(--muted);font-size:10px}.section-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;display:grid}.section-card{border:1px solid var(--line);min-height:66px;color:var(--ink);text-align:right;background:#fff;border-radius:12px;align-items:center;gap:12px;padding:12px 15px;display:flex}.section-card:hover,.section-card.selected{background:#f5f9fc;border-color:#abc8e1}.section-number{color:#c1cbd3;font:500 11px DM Mono,monospace}.section-card div{flex:1;gap:1px;display:grid}.section-card b{font-size:11px}.section-card small{color:var(--muted);font-size:9px}.section-arrow{color:var(--blue);font-size:18px}.lecture-picker{color:var(--muted);align-items:center;gap:10px;margin-top:25px;font-size:10px;display:flex}.lecture-picker select{border:1px solid var(--line);min-width:190px;color:var(--ink-soft);background:#fff;border-radius:8px;outline:0;padding:7px 10px;font-size:10px}@media (width<=1100px){.sidebar{width:220px}.main-content{padding:32px 32px 60px}.hero-panel{padding-right:43%}.lecture-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.metric-grid{grid-template-columns:repeat(2,1fr)}.builder-layout{grid-template-columns:1fr}.builder-summary{position:static}.all-lectures{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=740px){.app-shell{display:block}.sidebar{z-index:10;border-right:0;border-bottom:1px solid var(--line);width:100%;min-height:0;padding:13px 15px;display:block;position:sticky;top:0}.brand-lockup{width:max-content;padding:0}.brand-mark{border-radius:10px 10px 10px 3px;width:34px;height:34px;font-size:10px}.brand-name{font-size:14px}.brand-sub{font-size:8px}.sidebar-rule,.nav-caption,.sidebar-bottom{display:none}.main-nav{border:1px solid var(--line);direction:rtl;background:#fff;border-radius:13px;padding:5px;display:flex;position:absolute;top:65px;left:12px;right:12px;box-shadow:0 12px 25px #10305012}.nav-item{border-radius:9px;justify-content:center;gap:5px;padding:8px 5px;font-size:9px}.nav-icon{display:none}.nav-count{min-width:16px;margin:0;padding:1px 3px;font-size:8px}.topbar-actions{gap:7px}.topbar-actions .icon-button{display:none}.student-chip{padding:3px 7px 3px 3px;font-size:8px}.student-avatar{width:24px;height:24px}.topbar h1{font-size:22px}.page-subtitle{max-width:280px;font-size:10px;line-height:1.7}.hero-panel{min-height:415px;padding:28px 22px}.hero-copy{min-width:0}.hero-copy h2{font-size:31px}.hero-copy p{font-size:11px;line-height:1.9}.hero-visual{width:100%;height:145px;top:auto}.hero-book{font-size:67px;top:3px;right:42%}.orbit-one{width:270px;height:110px;top:35px;right:13%}.orbit-two{width:150px;height:200px;top:-25px;right:31%}.chip-top{top:4px;right:10px}.chip-bottom{bottom:9px;left:15px;right:auto}.metric-grid{gap:8px}.metric-card{gap:8px;padding:11px 9px}.metric-icon{width:29px;height:29px;font-size:14px}.metric-card b{font-size:17px}.metric-card span:not(.metric-icon){font-size:8px}.continue-card{align-items:flex-start;padding:12px}.continue-card .text-button{margin-top:5px}.lecture-grid,.all-lectures{grid-template-columns:1fr}.home-lectures .lecture-card:nth-child(n+3){display:none}.section-heading h2{font-size:18px}.library-toolbar{flex-direction:column;align-items:stretch}.search-field{width:100%}.mistakes-hero{flex-direction:column;align-items:flex-start;padding:22px}.mistakes-number{border-top:1px solid #f0d8d4;border-right:0;justify-items:start;width:100%;padding:10px 0 0}.mistakes-number b{font-size:32px}.review-toolbar{flex-direction:column;align-items:flex-start;gap:10px}.mistake-row{gap:9px;padding:12px}.mistake-text b{white-space:normal}.builder-card{padding:19px 15px}.choice-grid{grid-template-columns:1fr}.builder-summary{padding:20px}.question-layout{grid-template-columns:1fr;gap:0}.question-rail{align-items:center;gap:8px;margin-bottom:18px;padding:0;display:flex;overflow-x:auto}.rail-label,.rail-legend{display:none}.rail-numbers{flex-wrap:nowrap;gap:5px;display:flex}.rail-numbers button{min-width:31px;padding:7px 4px}.rail-numbers small{display:none}.question-meta{flex-direction:column-reverse;align-items:flex-start;gap:8px}.question-stem{font-size:19px;line-height:1.65}.option-text{font-size:11px}.question-footer{margin-top:22px}.lecture-intro{flex-wrap:wrap;align-items:flex-start;padding:15px}.lecture-intro>div:nth-child(2){min-width:calc(100% - 65px)}.lecture-intro .primary-button{width:100%}.section-list{grid-template-columns:1fr}.lecture-picker{flex-direction:column;align-items:flex-start}.lecture-picker select{width:100%}.result-card{padding:28px 18px}.result-actions{flex-direction:column;align-items:stretch}body{overflow-x:hidden}.sidebar{padding:11px 13px 8px;position:sticky}.main-nav{box-shadow:none;grid-template-columns:repeat(4,1fr);gap:3px;margin-top:11px;padding:4px;display:grid;position:relative;inset:auto}.nav-item{flex-direction:column;gap:2px;min-height:43px;padding:6px 3px;font-size:9px;line-height:1.15}.nav-icon{color:#91a0af;width:auto;height:16px;font-size:16px;display:block}.nav-item.active .nav-icon{color:var(--blue)}.nav-count{margin-top:-2px;margin-right:35px;position:absolute}.main-content{padding:20px 13px 72px}.topbar{align-items:flex-start;margin-bottom:20px}.topbar h1{letter-spacing:-.6px;font-size:21px}.page-subtitle{max-width:245px}.quiz-shell{margin:0}.quiz-topline{z-index:5;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f7f9fbeb;margin:-8px -2px 12px;padding:8px 2px;position:sticky;top:0}.quiz-heading{max-width:175px}.quiz-heading span{font-size:9px}.quiz-heading 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(width<=740px){.question-layout{width:100%;min-width:0;display:block}.question-rail{width:100%;margin-bottom:13px;display:block;overflow:visible}.rail-label{margin-bottom:6px;display:flex}.rail-numbers{flex-wrap:nowrap;gap:5px;width:100%;min-width:0;max-width:100%;max-height:none;padding:2px 0 7px;display:flex;overflow:auto hidden}.rail-numbers button{flex:none;min-width:31px;padding:7px 4px}}.question-layout,.question-rail,.question-main{min-width:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}