:root{--ink:#202d29;--muted:#5c6964;--green:#215f4c;--green-dark:#143d31;--line:#dce1db;--bg:#f5f5ef;--sidebar:218px}
body{background:var(--bg)}
.w-progress-panel{margin-bottom:25px}.w-progress-panel>.lesson-row>strong{font-size:12px;color:#456443}
@media(max-width:720px){.w-course-rail nav a.active>div{display:none!important}.w-course-rail nav{justify-content:space-between}}
.sidebar{background:#172c24;color:#edf2e8;padding:28px 16px 16px;overflow-y:auto}
.brand{margin:0 7px 30px;gap:10px}.brand strong{font-size:14px;letter-spacing:1.2px}.brand small{font-size:11px;color:#a6bcb0}.brand-mark{background:#d6e7bc;color:#1c3829;border-radius:5px}
.sidebar-label{color:#96ae9f;font-size:10px}.sidebar-label.second{margin-top:25px}
.nav-link{color:#c1cec4!important;font-size:13px!important;padding:11px 12px;border-radius:5px}.nav-link:hover{background:#ffffff0b}.nav-link.active{color:#fff!important;background:#344f40}.nav-active{background:#dfb980}
.sidebar-bottom{padding-top:25px}.sidebar-progress{padding:0 9px 14px}.sidebar-progress>div:not(.track){display:flex;justify-content:space-between;font-size:12px;margin-bottom:11px}.sidebar-progress>.text-link{color:#dfd7ac;font-size:12px;margin-bottom:15px}.sidebar-progress small,.target-card small{color:#a7bbad}.target-card{border-color:#405146}.target-card strong{color:#dce7d9}.target-icon{background:#30483a;color:#bdd1b4}.sidebar .track{background:#354a3d}.sidebar .track i{background:#d1b781}
.topbar{height:68px;padding:0 36px;background:#fff;border-color:#dce1db}.breadcrumbs{color:#62736a}.breadcrumbs strong{color:#233d30}.version-badge{color:#345441}.avatar{display:none}
main{padding:34px 36px 60px;max-width:1440px}.button{font-size:14px;border-radius:5px;padding:12px 18px}.text-link,.text-button{font-size:13px}.eyebrow{font-size:11px;color:#526657}
.w-home-hero{display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:35px;padding:34px 0 44px;border-bottom:1px solid #d6ddd4;margin-bottom:35px}
.w-home-hero h1{font-size:clamp(38px,4.2vw,59px);line-height:1.05;letter-spacing:-2px;font-weight:650;margin-bottom:22px}.w-home-hero .eyebrow{letter-spacing:1.7px;font-size:10px;margin-bottom:22px}
.w-home-intro{font-size:17px;line-height:1.7;max-width:475px;color:#516257;margin-bottom:23px}.w-start-note{font-size:12px;line-height:1.6;color:#5d6b62;max-width:360px;margin:16px 0 0}
.w-machine{padding:32px 23px 22px;border:1px solid #cdd6c9;border-radius:8px;background-color:#edf0e5;background-image:linear-gradient(#bdcbb529 1px,transparent 1px),linear-gradient(90deg,#bdcbb529 1px,transparent 1px);background-size:22px 22px;min-width:0}
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.w-trace{background:#fff;border:1px solid #d8e0d1;padding:22px;border-radius:6px}.w-value-table{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}.w-value-table>div{display:flex;flex-direction:column;border:1px solid #d0dfc7;min-width:100px;padding:10px 15px;border-radius:4px;background:#f2f6e9}.w-value-table code{font-size:11px;color:#597151}.w-value-table strong{font:600 22px Consolas,monospace;color:#2c4c34;margin-top:7px}.w-trace>p{font-size:15px;color:#3f5643;min-height:52px}.w-trace-controls{display:flex;justify-content:space-between;align-items:center;gap:10px}.w-trace-controls>span{font:12px Consolas,monospace;color:#597151}
.w-options{display:grid;gap:12px;margin:20px 0}.w-options button{display:flex;align-items:center;gap:15px;text-align:left;background:#fff;border:1px solid #ccd8c6;border-radius:6px;padding:17px;font-size:15px;line-height:1.7}.w-options button.chosen{background:#e6efdd;border:2px solid #4d7550;padding:16px}.w-options button>span{border:1px solid #bbcdb5;width:27px;height:27px;border-radius:4px;flex-shrink:0;display:grid;place-items:center;font:12px Consolas,monospace}
.w-feedback{margin-top:22px;padding:22px;background:#f7edde;border:1px solid #dfc9a9;border-left:4px solid #b1824e;border-radius:4px;color:#694b2d}.w-feedback.passed{background:#edf4e5;border-color:#b6ccaa;border-left-color:#5e834e;color:#305a36}.w-feedback p{font-size:14px;line-height:1.8;margin:10px 0 0}.w-passed{font-size:13px;margin-top:18px;color:#365f3c}.w-step-footer{display:flex;justify-content:space-between;align-items:center;gap:15px;border-top:1px solid #d4ddce;margin-top:35px;padding-top:23px}
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/* Lift contrast and readable sizes throughout the existing library. */
.subheading,.lesson-objective,.reading>p,.reading .walkthrough p,.unit-title p,.lesson-row small,.code-context,.notes-area>p,.lab-section>p,.project-body>p,.glossary-entry p{color:#4a6050!important}.reading>p{font-size:16px;line-height:1.9}.lesson-content{min-width:0}.lesson-row small{font-size:12px}.unit-progress{color:#4e6850}.callout p,.hint-box p{color:#4d633d}.runtime-note{color:#546a47!important}.editor-toolbar>span,.editor-title small{color:#b5c7a8}.compiler-output{color:#745334}.test-row code,.test-expected,.test-expected small{color:#58703f}footer,footer span{color:#5a6d5b;font-size:11px}
@media(max-width:1200px){.w-lesson{grid-template-columns:190px minmax(0,1fr);gap:26px}.w-home-hero{gap:25px}.w-machine{padding:23px 16px}.w-press{width:104px}.w-chapter-go{display:none}.w-chapter{padding:18px}}
@media(max-width:1000px){.w-home-hero{grid-template-columns:1fr}.w-machine{display:none}.w-home-hero h1{font-size:48px}.w-home-intro{max-width:580px}.w-chapters{grid-template-columns:1fr}.w-paths{grid-template-columns:1fr}.w-lesson{display:block}.w-course-rail{border-right:0;padding:0}.w-course-rail>.eyebrow,.w-course-rail>h2,.w-course-rail>p:not(.eyebrow),.w-course-note{display:none}.w-course-rail .w-back{margin:0 0 16px}.w-course-rail nav{display:flex;gap:7px;overflow:auto;margin:0 0 24px;padding:2px}.w-course-rail nav a{margin:0;padding:6px;flex-shrink:0}.w-course-rail nav a>div{display:none}.w-course-rail nav a.active>div{display:block;font-size:11px;max-width:130px}.w-course-rail nav a small{display:none}.w-lesson-main>h1{font-size:30px}}
@media(max-width:720px){main{padding:26px 20px 44px}.topbar{height:62px;padding:0 18px}.w-home-hero{padding:15px 0 30px;margin-bottom:20px}.w-home-hero h1{font-size:41px;letter-spacing:-1.5px}.w-home-intro{font-size:16px}.w-section-head{align-items:start;gap:12px}.w-section-head h2{font-size:23px}.w-section-head p:last-child{font-size:13px}.w-section-head .w-count{display:none}.w-chapter{gap:12px;padding:18px 15px}.w-chapter h3{font-size:17px}.w-chapter small{font-size:10px}.w-prose{font-size:16px}.w-annotations>div{grid-template-columns:1fr;gap:8px}.w-annotations dd{font-size:14px}.w-code{font-size:12px}.w-editor-top>span{display:none}.w-editor-bottom{flex-wrap:wrap}.w-editor textarea{font-size:13px;padding:16px;min-height:320px}.w-step-footer .button{font-size:12px;padding:12px}.w-trace{padding:16px}.w-results{padding:17px}.w-options button{padding:14px;font-size:14px}.w-options button.chosen{padding:13px}.w-value-table>div{min-width:85px}.w-lesson-main>h1{font-size:28px}.sidebar .brand{margin-bottom:25px}.w-test-mark{width:12px}.w-tests>div{gap:8px}.w-tests small{max-width:85px}}