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var(--tw-ring-offset-width))var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px)}.blur,.grayscale{filter:var(--tw-blur,)var(--tw-brightness,)var(--tw-contrast,)var(--tw-grayscale,)var(--tw-hue-rotate,)var(--tw-invert,)var(--tw-saturate,)var(--tw-sepia,)var(--tw-drop-shadow,)}.grayscale{--tw-grayscale:grayscale(100%)}.filter{filter:var(--tw-blur,)var(--tw-brightness,)var(--tw-contrast,)var(--tw-grayscale,)var(--tw-hue-rotate,)var(--tw-invert,)var(--tw-saturate,)var(--tw-sepia,)var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,visibility,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.transition-all{transition-property:all;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.transition-colors{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.duration-200{--tw-duration:.2s;transition-duration:.2s}.duration-500{--tw-duration:.5s;transition-duration:.5s}@media (hover:hover){.hover\:bg-blue-700:hover{background-color:var(--color-blue-700)}.hover\:bg-green-700:hover{background-color:var(--color-green-700)}.hover\:underline:hover{text-decoration-line:underline}.hover\:shadow-md:hover{--tw-shadow:0 4px 6px -1px var(--tw-shadow-color,#0000001a),0 2px 4px -2px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}}@media (min-width:40rem){.sm\:px-6{padding-inline:calc(var(--spacing)*6)}}@media (min-width:48rem){.md\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.md\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (min-width:64rem){.lg\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.lg\:px-8{padding-inline:calc(var(--spacing)*8)}}}:root{--surface:#fff;--surface-2:#f1f0ea;--surface-3:#e9e8e0;--ink-2:#3f5059;--ink-3:#5c6a71;--ink-4:#8a969b;--line:#e3e4dd;--line-2:#cfd3ca;--olive-ink:#3b5410;--olive-bg:#eef4dc;--teal:#1d5c66;--teal-bg:#e6f0f1;--ok:#2f7d4f;--ok-bg:#e6f3ea;--warn:#9a6a12;--warn-bg:#fff4dc;--danger:#b3261e;--danger-bg:#fbe9e7;--font-sans:var(--font-inter),-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--font-mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;--t-xs:12px;--t-s:14px;--t-m:16px;--t-l:20px;--t-xl:24px;--t-2xl:32px;--t-display:clamp(32px,4vw,44px);--lh-tight:1.2;--lh-body:1.6;--radius-s:6px;--radius-m:12px;--shadow-s:0 1px 2px #172b360f;--shadow-m:0 6px 20px #172b3614;--gutter:20px;--content:1120px;--wide:1360px;--header-h:56px;--tabs-h:46px;--bottom-nav-h:60px;--target:44px;--background:var(--paper);--foreground:var(--ink);--bg-primary:var(--surface);--bg-secondary:var(--paper);--bg-tertiary:var(--surface-2);--text-primary:var(--ink);--text-secondary:var(--ink-3);--text-muted:var(--ink-4);--border-light:var(--line);--border-medium:var(--line-2);--primary-blue:var(--teal);--dark-blue:var(--ink);--primary-gold:var(--olive);--accent-green:var(--ok);--border-radius-sm:var(--radius-s);--border-radius-md:var(--radius-s);--border-radius-lg:var(--radius-m);--shadow-sm:var(--shadow-s);--shadow-md:var(--shadow-m);--transition:all .15s 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--tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-gradient-position{syntax:"*";inherits:false}@property --tw-gradient-from{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-via{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-to{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-stops{syntax:"*";inherits:false}@property --tw-gradient-via-stops{syntax:"*";inherits:false}@property --tw-gradient-from-position{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --tw-gradient-via-position{syntax:"<length-percentage>";inherits:false;initial-value:50%}@property --tw-gradient-to-position{syntax:"<length-percentage>";inherits:false;initial-value:100%}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@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-outline-style{syntax:"*";inherits:false;initial-value:solid}@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}@property --tw-duration{syntax:"*";inherits:false}:root{--ink:#172b36;--paper:#f8f7f3;--olive:#d6ec8b;--line:#dedfd8}body{background:var(--paper);color:var(--ink)}a,button{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #688521;outline-offset:4px}.class-nav{padding:22px max(5vw,20px);display:flex;justify-content:space-between;align-items:center;background:#fff;border-bottom:1px solid var(--line);gap:20px}.wordmark{font-weight:800;font-size:21px;letter-spacing:-1px}.wordmark span{font-weight:400;letter-spacing:-.4px}.class-nav nav{display:flex;align-items:center;gap:30px;font-size:14px}.term{border-left:1px solid var(--line);padding-left:25px;color:#64706d}.skip-link{position:absolute;top:-100px}.skip-link:focus{top:10px;left:10px;z-index:50;background:white;padding:16px}.class-container{max-width:1300px;margin:auto;padding:65px 5vw}.eyebrow{font-size:11px;font-weight:700;letter-spacing:1.8px;line-height:1.6;color:#60716b}.display-title{font-size:clamp(38px,5.7vw,76px);font-weight:600;line-height:1.04;letter-spacing:-3px;margin:24px 0}.intro{font-size:18px;color:#60716b;line-height:1.8;margin:20px 0 40px}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:50px}.course-tile{padding:28px;border:1px solid var(--line);border-radius:8px;background:#eeeee8;min-height:365px}.active-course{background:var(--ink);color:white;transition:transform .15s}.active-course:hover{transform:translateY(-3px)}.tile-meta{display:flex;justify-content:space-between;font-size:11px;letter-spacing:1px;gap:10px}.status-chip{color:var(--ink);background:var(--olive);padding:2px 10px;border-radius:30px}.tile-symbol{display:block;font-size:45px;margin:30px 0 16px}.course-tile h2{font-size:25px;font-weight:600;line-height:1.2;letter-spacing:-.5px}.course-tile p{font-size:13px;margin:18px 0 25px;opacity:.8}.course-tile strong{font-size:13px;color:var(--olive)}.muted{color:#64706d}.next-session{margin:45px 0;padding:36px;background:#ebf0e0;border:1px solid #d9e1c9;border-radius:8px}.next-session h2{font-size:clamp(26px,3vw,40px);font-weight:600;letter-spacing:-1px;margin:10px 0}.next-session p{max-width:700px;line-height:1.8;margin-bottom:20px}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:5px;font-weight:600;font-size:13px;line-height:1.5}.primary-button{background:var(--ink);color:#fff;border:1px solid var(--ink)}.primary-button:hover{background:#284652}.secondary-button{background:#fff;color:var(--ink);border:1px solid #cdd2c8}.button-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.resource-section{margin:50px 0}.resource-section h2{font-size:34px;font-weight:600;letter-spacing:-1px}.resource-links{display:flex;gap:16px;flex-wrap:wrap;margin-top:20px}.resource-links a{background:white;border:1px solid var(--line);border-radius:5px;padding:16px;font-size:14px}.section-heading{display:flex;justify-content:space-between;gap:15px;align-items:end;margin-bottom:16px}.section-heading>a{font-size:14px}.lesson-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:25px}.lesson-link{display:flex;gap:18px;border:1px solid var(--line);padding:20px;background:white;border-radius:5px}.lesson-link>span{font-size:13px;color:#6b7b6e}.lesson-link h3{font-size:15px;font-weight:600}.lesson-link p{font-size:12px;color:#64706d;line-height:1.7;margin-top:7px}.class-footer{max-width:1400px;margin:20px auto 0;padding:30px 5vw;border-top:1px solid var(--line);color:#64706d;font-size:12px}.lecture-shell{max-width:1600px;margin:auto;padding:25px 4vw}.lecture-top{display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:12px}.text-button{font-size:12px;text-decoration:underline;text-underline-offset:4px;padding:6px 0;color:var(--ink)}.lecture-header{display:flex;justify-content:space-between;gap:30px;align-items:center;margin:40px 0 30px}.lecture-header h1{font-size:clamp(30px,3.6vw,53px);font-weight:600;letter-spacing:-2px;line-height:1.2;margin:10px 0}.lecture-header h1 span{color:#75993c}.lecture-header>div>p:last-child{font-size:15px;color:#64706d}.dataset-badge{display:flex;flex-direction:column;border-left:1px solid var(--line);padding:15px 0 15px 30px;flex-shrink:0}.dataset-badge strong{font-size:36px;letter-spacing:-1px;font-weight:500}.dataset-badge span{font-size:11px;color:#64706d}.step-nav{display:flex;overflow-x:auto;border:1px solid var(--line);background:#fff;border-radius:6px;margin-bottom:30px}.step-nav button{padding:15px 18px;flex:1;min-width:125px;text-align:left;border-right:1px solid var(--line);font-size:11px;line-height:1.5}.step-nav button:last-child{border:0}.step-nav span{display:block;font-size:11px;font-weight:700;margin-bottom:5px;color:#758278}.step-nav [aria-current=step]{background:var(--ink);color:white}.step-nav [aria-current=step] span{color:var(--olive)}.lecture-grid{display:grid;grid-template-columns:minmax(270px,340px) minmax(0,1fr);gap:32px}.lesson-panel h2{font-size:28px;font-weight:600;letter-spacing:-.8px;line-height:1.2;margin:12px 0 20px}.lesson-panel p{font-size:14px;line-height:1.85}.lesson-panel .eyebrow{font-size:10px;line-height:1.8}.prediction{background:#eceee5;border-left:3px solid #879b69;padding:18px;margin:25px 0}.prediction span{font-size:10px;font-weight:700;letter-spacing:1.5px}.prediction p{margin-top:8px;font-size:13px}.lesson-panel h3{font-size:16px;font-weight:700;margin:20px 0 8px}.task-prompt{font-weight:500}.lesson-panel .button-row{margin-top:16px;gap:20px}.hint-box,.query-error,.query-success{padding:15px;margin:16px 0;border-radius:5px;font-size:13px;line-height:1.7}.hint-box{background:#f9f0d8;border:1px solid #e7d9b4}.query-error{background:#fff0ec;color:#8c2929;border:1px solid #e9c9c2}.query-success{background:#e8f1d8;color:#344d20;border:1px solid #cbdcba}.solution-code{white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.8 monospace;padding:15px;background:#e9ebe5;margin-top:15px}.lesson-panel .progress-note{font-size:11px;color:#64706d;margin-top:24px}.schema-details{margin-top:25px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.schema-details summary{font-size:13px;font-weight:600;cursor:pointer}.schema-details dl{margin-top:15px}.schema-details dl>div{padding:6px 0}.schema-details dt{font:12px monospace;font-weight:600}.schema-details dd{font-size:11px;color:#64706d;margin-top:3px}.download-db{display:inline-block;margin-top:18px;font-size:12px}.query-panel{background:white;border:1px solid var(--line);border-radius:7px;overflow:hidden;align-self:start;min-width:0}.editor-toolbar{display:flex;justify-content:space-between;gap:15px;padding:18px 22px;background:#172b36;color:white}.editor-toolbar label{font:11px 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table{width:max-content;min-width:100%;border-collapse:collapse;font-size:14px;line-height:1.65;text-align:left}.result-scroll th{position:sticky;top:0;z-index:1;background:#f0f2eb;font:600 13px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace;padding:15px 20px;white-space:nowrap;border-bottom:1px solid #d6dcd0}.result-scroll td{padding:14px 20px;border-top:1px solid #e7e9e2;min-width:100px;white-space:nowrap;vertical-align:top;font-variant-numeric:tabular-nums}.result-long-text{display:block;width:clamp(280px,32vw,480px);white-space:normal;overflow-wrap:break-word}.result-scroll:focus-visible{outline:3px solid #688521;outline-offset:2px}.result-scroll tbody tr:hover{background:#eef3e4}.result-scroll tr:nth-child(2n){background:#fafbf8}.empty-results{text-align:center;padding:45px 20px 60px;color:#77817b}.empty-results>span{font-size:35px;color:#bcc5b6}.empty-results h3{font-size:16px;font-weight:500;margin:12px 0}.empty-results 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