/* Professional Unity/Flutter tracks: calm hierarchy, precise code surfaces. */
.zib-pro-course,.zib-pro-lesson{--pro-ink:#0c1728;--pro-muted:#5d6b80;--pro-line:#dbe4ef;--pro-soft:#f5f8fc;--pro-blue:#1557ff;--pro-green:#087f5b;overflow-x:hidden;color:var(--pro-ink);background:#fbfdff}
.zib-pro-course .zib-container,.zib-pro-lesson .zib-container{width:min(1180px,calc(100% - 34px))}
.zib-pro-hero{position:relative;padding:34px 0 46px;overflow:hidden;color:#eef5ff;background:radial-gradient(circle at 15% 5%,color-mix(in srgb,var(--course-color) 34%,transparent),transparent 34%),radial-gradient(circle at 83% 10%,rgba(56,115,255,.18),transparent 28%),linear-gradient(145deg,#061426,#0b213e)}
.zib-pro-hero::after{content:"";position:absolute;inset:auto -120px -260px auto;width:560px;height:560px;border:1px solid rgba(148,184,237,.12);border-radius:50%;box-shadow:0 0 0 50px rgba(148,184,237,.035),0 0 0 110px rgba(148,184,237,.025)}
.zib-pro-hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:50px;align-items:center}
.zib-pro-hero .zib-school-breadcrumb{margin-bottom:24px;color:#9fb3ce;font-size:12px}.zib-pro-hero .zib-school-breadcrumb a{color:#c6d8ef}
.zib-pro-label{display:flex;align-items:center;gap:12px;color:#a9c6f4;font-size:12px;font-weight:900}.zib-pro-label .zib-course-icon{width:62px;height:62px;padding:5px}
.zib-pro-hero h1{margin:14px 0 13px;color:#fff;font-size:clamp(34px,4.2vw,54px);line-height:1.35;letter-spacing:-1.4px}.zib-pro-hero h1 span{color:#95b9ff;font-size:.72em}
.zib-pro-hero-copy>p{max-width:720px;margin:0;color:#c8d6e8;font-size:15px;line-height:2.05}
.zib-pro-hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.zib-pro-hero .zib-btn{background:#1557ff;box-shadow:0 12px 28px rgba(21,87,255,.28)}.zib-pro-hero .zib-btn-ghost{color:#edf5ff;border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.07);box-shadow:none}
.zib-pro-proof{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:19px;color:#afc2db;font-size:11px}.zib-pro-proof span::first-letter{color:#63d6ac}
.zib-pro-project-card{padding:28px;border:1px solid rgba(255,255,255,.13);border-radius:22px;background:rgba(5,19,38,.72);box-shadow:inset 0 1px rgba(255,255,255,.06),0 25px 60px rgba(0,0,0,.18);backdrop-filter:blur(18px)}
.zib-pro-project-card>span{color:#87adf5;font-size:11px;font-weight:900}.zib-pro-project-card h2{margin:8px 0;color:#fff;font-size:21px;line-height:1.65}.zib-pro-project-card>p{margin:0;color:#aebfd5;font-size:11px;line-height:1.95}.zib-pro-project-card dl{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin:20px 0 14px}.zib-pro-project-card dl div{padding:11px 5px;border:1px solid rgba(255,255,255,.08);border-radius:12px;text-align:center;background:rgba(255,255,255,.04)}.zib-pro-project-card dt{color:#fff;font-size:18px;font-weight:950}.zib-pro-project-card dd{margin:2px 0 0;color:#91a5bf;font-size:8px}.zib-pro-project-card .zib-overall-progress{display:flex;gap:9px;align-items:center}.zib-pro-project-card .zib-overall-progress>i{flex:1;height:7px;overflow:hidden;border-radius:99px;background:rgba(255,255,255,.11)}.zib-pro-project-card .zib-overall-progress em{display:block;height:100%;background:#4d83f5}.zib-pro-project-card .zib-overall-progress b{font-size:11px}.zib-pro-project-card>small{display:block;margin-top:8px;color:#8094ae;font-size:8px}
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.zib-pro-roadmap{padding:64px 0;background:#f5f8fc}.zib-pro-roadmap .zib-school-section-head{display:flex;gap:24px;align-items:end;justify-content:space-between;margin-bottom:26px}.zib-pro-roadmap .zib-school-section-head h2{margin:6px 0}.zib-pro-roadmap .zib-school-section-head p{margin:0;color:var(--pro-muted)}
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/* Lesson shell */
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.zib-pro-checklist{display:grid;gap:8px;margin:0;padding:0;list-style:none;counter-reset:none}.zib-pro-checklist li{display:flex;gap:10px;align-items:start;padding:11px 13px;border-bottom:1px solid #edf1f5;color:#3e4e64;font-size:11px}.zib-pro-checklist li:last-child{border:0}.zib-pro-checklist span{display:grid;flex:0 0 22px;width:22px;height:22px;place-items:center;border-radius:7px;color:#08775a;background:#e7f8f1;font-size:9px}
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.zib-pro-walkthrough{display:grid;gap:9px;margin:0;padding:0;list-style:none}.zib-pro-walkthrough li{display:grid;grid-template-columns:31px 1fr;gap:11px;align-items:start}.zib-pro-walkthrough li>span{display:grid;width:30px;height:30px;place-items:center;border-radius:9px;color:#fff;background:#1557ff;font-size:9px;font-weight:950}.zib-pro-walkthrough p{margin:2px 0;padding:0 0 12px;border-bottom:1px solid #edf1f5;color:#3f4f64;font-size:11px;line-height:1.9}.zib-pro-expected{margin-top:17px;padding:15px 17px;border:1px solid #abe2cd;border-radius:13px;background:#f0fcf7}.zib-pro-expected strong{color:#087355;font-size:10px}.zib-pro-expected p{margin:3px 0 0;color:#335f51;font-size:10px;line-height:1.85}
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.zib-pro-debug{border-color:#ead8b5}.zib-pro-debug-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.zib-pro-debug-grid article{padding:17px;border-radius:13px;background:#fff8ea}.zib-pro-debug-grid article:nth-child(2){background:#f8f5ef}.zib-pro-debug-grid article:nth-child(3){background:#effbf6}.zib-pro-debug-grid span{color:#8a5b0a;font-size:9px;font-weight:950}.zib-pro-debug-grid p{margin:5px 0 0;color:#5c5547;font-size:10px;line-height:1.85}.zib-pro-mistakes{margin-top:12px;padding:15px 17px;border-top:1px solid #eee4d3}.zib-pro-mistakes h3{margin:0 0 8px;font-size:12px}
.zib-pro-quizzes{display:grid;gap:12px}.zib-pro-quizzes .zib-quality-quiz-card{margin:0}.zib-pro-references h2{margin:0 0 11px;font-size:16px}.zib-pro-references>div{display:flex;flex-wrap:wrap;gap:8px}.zib-pro-references a{display:flex;gap:10px;align-items:center;padding:9px 12px;border:1px solid #d5e1f2;border-radius:10px;color:#1557ff;background:#f6f9ff;font-size:9px;font-weight:850;text-decoration:none}
.zib-pro-complete{display:flex;gap:20px;align-items:center;justify-content:space-between;color:#edf5ff;border-color:#173d68;background:radial-gradient(circle at 15% 5%,rgba(48,111,240,.28),transparent 34%),linear-gradient(140deg,#07182f,#0b294d)}.zib-pro-complete span{color:#83aff8;font-size:9px;font-weight:900}.zib-pro-complete h2{margin:4px 0;color:#fff;font-size:20px}.zib-pro-complete p{margin:0;color:#adc0d8;font-size:10px}.zib-pro-complete>div:last-child{display:flex;gap:8px;flex:0 0 auto}.zib-pro-complete .zib-btn-ghost{color:#fff;border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.07)}
.zib-study-inline{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:10px;align-items:center;margin:0 0 18px;padding:16px 18px;border:1px solid #d5e1ef;border-radius:14px;background:#fff}.zib-study-inline strong{font-size:12px}.zib-study-inline p{margin:2px 0;color:var(--pro-muted);font-size:9px}.zib-study-inline label{display:flex;gap:6px;align-items:center;color:#68768a;font-size:8px}.zib-study-inline button{min-height:37px;padding:7px 13px;border:0;border-radius:9px;color:#fff;background:#1557ff;font:inherit;font-size:9px;font-weight:900;cursor:pointer}.zib-study-inline>small{grid-column:2/-1;color:#6b788a;font-size:8px}
.zib-pro-lesson-nav{display:grid;grid-template-columns:1fr 1fr;gap:12px}.zib-pro-lesson-nav a{padding:15px 17px;border:1px solid #dbe4ef;border-radius:13px;color:#34455c;background:#fff;text-decoration:none}.zib-pro-lesson-nav a:last-child{text-align:left}.zib-pro-lesson-nav span{display:block;color:#8794a5;font-size:8px}.zib-pro-lesson-nav strong{display:block;margin-top:3px;font-size:10px}
/* Dark mode */
body.zib-theme-dark.zib-pro-course,body.zib-dark.zib-pro-course,body.zib-theme-dark.zib-pro-lesson,body.zib-dark.zib-pro-lesson{--pro-ink:#e9f1fc;--pro-muted:#a8b6ca;--pro-line:#293c56;--pro-soft:#0c1727;color:#e7effa;background:#091321}
body.zib-theme-dark .zib-pro-method,body.zib-dark .zib-pro-method,body.zib-theme-dark .zib-pro-roadmap,body.zib-dark .zib-pro-roadmap,body.zib-theme-dark .zib-pro-reminder-section,body.zib-dark .zib-pro-reminder-section,body.zib-theme-dark .zib-pro-shell,body.zib-dark .zib-pro-shell{background:#0a1524}
body.zib-theme-dark .zib-pro-method-grid article,body.zib-dark .zib-pro-method-grid article,body.zib-theme-dark .zib-pro-chapter,body.zib-dark .zib-pro-chapter,body.zib-theme-dark .zib-pro-section,body.zib-dark .zib-pro-section,body.zib-theme-dark .zib-pro-outcomes,body.zib-dark .zib-pro-outcomes,body.zib-theme-dark .zib-pro-references,body.zib-dark .zib-pro-references,body.zib-theme-dark .zib-pro-sidebar,body.zib-dark .zib-pro-sidebar,body.zib-theme-dark .zib-study-inline,body.zib-dark .zib-study-inline{color:#e6eef9;border-color:#293d58;background:#101c2e}
body.zib-theme-dark .zib-pro-chapter>header,body.zib-dark .zib-pro-chapter>header,body.zib-theme-dark .zib-pro-lesson-hero,body.zib-dark .zib-pro-lesson-hero{border-color:#293d58;background:#0d1b2f}
body.zib-theme-dark .zib-pro-lesson-list>a,body.zib-dark .zib-pro-lesson-list>a{border-color:#243750;color:#dfe8f5}body.zib-theme-dark .zib-pro-lesson-list>a:hover,body.zib-dark .zib-pro-lesson-list>a:hover{background:#14253d}
body.zib-theme-dark .zib-pro-concepts article,body.zib-dark .zib-pro-concepts article,body.zib-theme-dark .zib-pro-theory article,body.zib-dark .zib-pro-theory article,body.zib-theme-dark .zib-pro-practice-grid>div,body.zib-dark .zib-pro-practice-grid>div,body.zib-theme-dark .zib-pro-outcomes li,body.zib-dark .zib-pro-outcomes li{color:#e0e9f5;border-color:#2b405c;background:#132238}
body.zib-theme-dark .zib-study-card,body.zib-dark .zib-study-card{border-color:#2c4d78;background:linear-gradient(120deg,#101d30,#102442)}
body.zib-theme-dark .zib-study-card h2,body.zib-dark .zib-study-card h2{color:#e9f1fc}
/* Responsive */
@media(max-width:980px){.zib-pro-hero-grid{grid-template-columns:1fr}.zib-pro-project-card{max-width:600px}.zib-pro-method-grid{grid-template-columns:repeat(2,1fr)}.zib-pro-roadmap .zib-school-section-head{display:block}.zib-pro-filter{margin-top:15px}.zib-pro-shell .zib-lesson-layout{grid-template-columns:1fr}.zib-pro-sidebar{position:fixed;visibility:hidden;z-index:90;top:68px;right:12px;bottom:12px;width:min(330px,calc(100% - 24px));max-height:none;transform:translateX(calc(100% + 28px));transition:transform .25s ease,visibility .25s ease}.zib-pro-sidebar.is-open{visibility:visible;transform:none}.zib-pro-content{width:100%}}
@media(max-width:720px){.zib-pro-hero{padding-top:22px}.zib-pro-hero h1{font-size:31px}.zib-pro-project-card{padding:21px}.zib-pro-method-grid{grid-template-columns:1fr}.zib-pro-chapter>header{display:block;padding:19px}.zib-pro-chapter>header>strong{display:inline-block;margin-top:10px}.zib-pro-lesson-list>a{grid-template-columns:38px minmax(0,1fr);padding:15px}.zib-pro-lesson-list>a>b{display:none}.zib-pro-lesson-list p{display:none}.zib-study-card{grid-template-columns:45px 1fr}.zib-study-card-action{grid-column:1/-1}.zib-pro-lesson-heading{grid-template-columns:1fr}.zib-pro-lesson-heading>aside{display:none}.zib-pro-outcomes{grid-template-columns:1fr}.zib-pro-concepts,.zib-pro-theory,.zib-pro-practice-grid,.zib-pro-debug-grid{grid-template-columns:1fr}.zib-pro-outcomes,.zib-pro-section,.zib-pro-references,.zib-pro-complete{padding:20px}.zib-pro-complete{display:block}.zib-pro-complete>div:last-child{margin-top:14px;flex-wrap:wrap}.zib-study-inline{grid-template-columns:1fr auto}.zib-study-inline>div{grid-column:1/-1}.zib-pro-lesson-nav{grid-template-columns:1fr}.zib-pro-lesson-nav a:last-child{text-align:right}.zib-pro-content .zib-lab-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.zib-pro-lesson-list>a,.zib-pro-sidebar{transition:none}}