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#3b3220;background:#17140d;color:#cdbb8d;border-radius:9px;padding:9px;font-size:8px;margin-bottom:10px}
@media(max-width:1180px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.lesson-body{grid-template-columns:1fr}.lesson-content{border-right:0;border-bottom:1px solid var(--line)}.project-layout{grid-template-columns:180px 1fr}.workspace-preview{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);min-height:450px}.tool-grid{grid-template-columns:1fr}}
@media(max-width:820px){.app{display:block}.sidebar{position:fixed;left:-260px;width:238px;transition:.2s}.sidebar.open{left:0}.mobile{display:block}.topbar{padding:0 13px}.search-box{width:55vw}.content{padding:16px}.hero{grid-template-columns:1fr}.grid-3,.grid-4{grid-template-columns:1fr}.learn-layout{grid-template-columns:1fr}.curriculum{position:relative;top:0;max-height:none}.lesson-list{max-height:260px}.project-layout{display:block}.file-tree{border-right:0;border-bottom:1px solid var(--line)}.workspace-preview{border-top:1px solid var(--line)}.sql-layout{grid-template-columns:1fr}.api-row{grid-template-columns:80px 1fr}.api-row .btn{grid-column:1/-1}.hero-main h1{letter-spacing:-2.7px}.lesson-top{display:block}.lesson-tabs{margin-top:12px}.view-title{display:block}.view-title .actions{margin-top:10px}}


/* v4 — calmer editorial theme + accessibility + all-device layout */
body{background:linear-gradient(180deg,#07111f 0,#081525 45%,#07111f 100%);letter-spacing:.005em}
.sidebar{background:#091726}.topbar{background:rgba(7,17,31,.92)}
.hero-main{background:#102039}.hero-main:after{content:"{ }";font-family:ui-monospace,monospace;color:#62cfff0a;right:20px;bottom:-45px;font-size:190px;letter-spacing:-28px}
.hero-main h1 span{color:var(--accent)}
.brand>span:last-child>span{color:var(--blue)}.brand-mark{background:var(--accent);color:#24130c;border-radius:9px}
.path-icon{background:#172c48;color:var(--blue);border:1px solid #2a4967}
.choice:hover,.choice.selected{border-color:#d87856;background:#241f27}.nav-btn.active>span,.eyebrow{color:var(--accent)}
.status-pill{border-color:#285362;color:#72d7ee;background:#0e2430}.bar i,.mastery-bar i{background:linear-gradient(90deg,var(--accent),var(--blue))}
.human-first{border:1px solid #2a536a;background:#0e2836;border-radius:12px;padding:14px 15px;margin:0 0 18px}.human-first b{font-size:10px;color:#83dcf2;text-transform:uppercase;letter-spacing:1px}.human-first p{margin:7px 0 0!important;color:#d8e8ef!important}
.mini-note{width:100%;min-height:92px;resize:vertical;border:1px solid var(--line);background:#0b1929;color:#edf4f8;border-radius:10px;padding:10px;font-size:9px;line-height:1.55;outline:0}.mini-note:focus{border-color:#4b7896}
.path-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;overflow:hidden;margin-bottom:18px;background:var(--line)}.path-picker>div{padding:16px;background:var(--panel)}.path-picker small,.path-picker span{display:block;color:var(--muted);font-size:8px;line-height:1.45}.path-picker strong{display:block;font-size:13px;margin:5px 0}
.track-filter{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}.track-filter>.input{width:min(520px,100%)}
.notebook-entry{border-top:1px solid var(--line);padding:10px 0}.notebook-entry b{font-size:9px}.notebook-entry p{font-size:9px!important;white-space:pre-wrap;margin:5px 0!important}.bookmark-row{width:100%;border:0;border-top:1px solid var(--line);background:transparent;color:inherit;display:flex;justify-content:space-between;gap:12px;padding:11px 0;text-align:left}.bookmark-row b{font-size:9px}.bookmark-row span{font-size:8px;color:var(--accent)}
.audit-card{display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden}.audit-card>div{padding:16px;border-right:1px solid var(--line)}.audit-card>div:last-child{border:0}.audit-card b,.audit-card span{display:block}.audit-card b{font-size:10px}.audit-card span{font-size:8px;color:var(--muted);margin-top:4px}
.onboard-progress{float:right;font-size:8px;color:var(--muted)}.onboard-foot{display:flex;justify-content:space-between;align-items:center;gap:14px;border-top:1px solid var(--line);padding-top:15px;margin-top:16px}.onboard-foot>span{font-size:8px;color:var(--muted)}
.high-contrast{--line:#62809a;--muted:#c1ccd5;--muted2:#a4b1bd}.high-contrast .card,.high-contrast .editor-shell,.high-contrast .modal-card{border-width:2px}.large-text .theory p,.large-text .aside-note,.large-text .feature-card p,.large-text .path-card p{font-size:11px}.large-text .nav-btn{font-size:13px}.large-text .theory h3{font-size:18px}
.reduce-motion *,.reduce-motion *:before,.reduce-motion *:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}
@media(pointer:coarse){button,.btn,.nav-btn,.seg,.mini-btn{min-height:44px}.quiz-option,.exam-option{padding:13px}.input,.select{height:44px}.lesson-tabs{scrollbar-width:none}}
@media(max-width:820px){.topbar{padding-left:max(13px,env(safe-area-inset-left));padding-right:max(13px,env(safe-area-inset-right))}.content{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right));padding-bottom:max(24px,env(safe-area-inset-bottom))}.lesson-tabs{display:flex;overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}.lesson-tab{flex:0 0 auto}.path-picker{grid-template-columns:1fr}.track-filter{align-items:stretch;flex-direction:column}.audit-card{grid-template-columns:1fr 1fr}.audit-card>div{border-bottom:1px solid var(--line)}.onboard-foot{align-items:flex-end}.modal{padding:10px}.modal-card{width:100%;max-height:94vh}}
@media(max-width:560px){.topbar{height:58px}.search-box{width:calc(100vw - 145px)}.search-box kbd{display:none}.search-box input{padding-right:10px}.top-actions{gap:5px}.top-actions .icon-btn{width:34px;height:34px}.status-pill{display:none}.content{padding:12px}.hero-main,.hero-side{padding:20px;border-radius:15px}.hero-main h1{font-size:clamp(35px,12vw,51px);line-height:.98;letter-spacing:-2px}.hero-main p{font-size:13px}.hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:14px}.grid-3,.grid-4{gap:9px}.feature-card,.path-card,.review-card{padding:15px}.view-title h1{font-size:25px}.view-title .actions{width:100%}.view-title .actions .btn{flex:1}.choice-grid{grid-template-columns:1fr}.modal-card{border-radius:16px;padding:18px}.learn-layout{gap:9px}.lesson-card{border-radius:13px}.lesson-body{display:block}.lesson-aside{border-left:0;border-top:1px solid var(--line);padding:14px}.editor-area,.code-editor,.monaco-host{height:280px;min-height:280px}.editor-foot{align-items:stretch;gap:8px;flex-direction:column}.editor-foot .btn{width:100%}.project-layout{border-radius:12px}.workspace-editor textarea{min-height:360px}.workspace-preview{min-height:360px}.tool-card{padding:13px}.api-row{grid-template-columns:1fr}.api-row .btn{grid-column:auto}.algo-stage{height:245px;padding:16px 10px}.audit-card{grid-template-columns:1fr}.onboard-foot{display:block}.onboard-foot>span{display:block;margin-bottom:8px}.onboard-foot .actions{width:100%}.onboard-foot .btn{flex:1}.toast{left:12px;right:12px;bottom:max(12px,env(safe-area-inset-bottom));text-align:center}}
@media(max-width:380px){.brand{font-size:16px}.hero-main h1{font-size:34px}.hero-stats{grid-template-columns:1fr 1fr}.path-meta{display:block}.path-meta b{display:block;margin-top:5px}.top-actions #shortcutsBtn{display:none}}
@media(max-height:520px) and (orientation:landscape){.sidebar{overflow:auto}.sidebar-foot{position:static;margin-top:16px}.modal-card{max-height:96vh}.hero{grid-template-columns:1fr}.editor-area,.code-editor,.monaco-host{height:230px;min-height:230px}}

/* v6 — commerce, scrollable navigation and one control language */
:root{--control-track:#23334a;--control-fill:#df7958;--control-thumb:#f3ede3}
*{scrollbar-width:thin;scrollbar-color:#3f6383 #0a1727}
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-track{background:#0a1727}
*::-webkit-scrollbar-thumb{background:#365b7a;border:2px solid #0a1727;border-radius:999px}
*::-webkit-scrollbar-thumb:hover{background:#477496}
.sidebar{display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;scrollbar-gutter:stable;height:100dvh}
.sidebar .brand{flex:0 0 auto;position:sticky;top:0;z-index:2;background:#091726;padding-bottom:11px}
.sidebar .nav-group{flex:0 0 auto}
.sidebar-foot{position:static!important;left:auto!important;right:auto!important;bottom:auto!important;margin-top:auto;flex:0 0 auto;padding-top:16px;padding-bottom:max(4px,env(safe-area-inset-bottom));background:linear-gradient(180deg,transparent,#091726 25%)}
input[type="range"]{-webkit-appearance:none;appearance:none;width:100%;height:28px;background:transparent;cursor:pointer;accent-color:var(--accent)}
input[type="range"]::-webkit-slider-runnable-track{height:5px;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--blue));box-shadow:inset 0 0 0 1px #ffffff12}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;margin-top:-6.5px;background:var(--control-thumb);border:3px solid var(--accent);box-shadow:0 2px 10px #0007}
input[type="range"]::-moz-range-track{height:5px;border:0;border-radius:999px;background:var(--control-track)}
input[type="range"]::-moz-range-progress{height:5px;border-radius:999px;background:var(--accent)}
input[type="range"]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--control-thumb);border:3px solid var(--accent);box-shadow:0 2px 10px #0007}
input[type="checkbox"],input[type="radio"]{accent-color:var(--accent)}
.account-btn{min-height:36px;border:1px solid #34536c;background:#102238;color:#edf4f8;border-radius:9px;padding:0 12px;font:700 9px/1 inherit;letter-spacing:.02em;white-space:nowrap}.account-btn:hover{border-color:#577a96;background:#132940}.account-btn.signed{color:#ffd8cb;border-color:#80513f;background:#241c1d}
.shop-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(250px,.75fr);border:1px solid var(--line);background:#f2ede4;color:#1a2330;border-radius:18px;overflow:hidden;margin-bottom:18px}.shop-copy{padding:34px}.shop-copy .eyebrow{color:#9d4c35}.shop-copy h1{font-family:Georgia,'Times New Roman',serif;font-size:clamp(34px,5vw,64px);line-height:.98;letter-spacing:-2.4px;margin:10px 0 14px;max-width:760px}.shop-copy p{color:#59626c;max-width:700px;font-size:12px;line-height:1.7}.shop-principles{background:#17304b;color:#eaf3fa;padding:28px;display:flex;flex-direction:column;justify-content:flex-end}.shop-principles h3{font:700 18px/1.15 Georgia,serif;margin:0 0 14px}.plain-list{display:grid;gap:9px}.plain-list div{border-top:1px solid #ffffff1f;padding-top:9px;font-size:9px;line-height:1.5;color:#bfd0dc}.plain-list b{color:#fff;display:block;margin-bottom:2px}
.price-filter{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 12px}.price-filter button{border:1px solid var(--line);background:#102039;color:#c9d5df;border-radius:999px;padding:8px 11px;font-size:8px;font-weight:700}.price-filter button.active{background:#f2ede4;color:#172232;border-color:#f2ede4}
.course-shop-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.shop-card{position:relative;background:#102039;border:1px solid var(--line);border-radius:14px;padding:17px;min-height:214px;display:flex;flex-direction:column}.shop-card:hover{border-color:#3e607d}.shop-card.featured{box-shadow:inset 0 3px 0 var(--accent)}.shop-card .course-topline{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}.course-kind{font-size:7px;letter-spacing:.11em;text-transform:uppercase;color:#7fa9c2}.course-price{font:700 25px/1 Georgia,serif;color:#f6e9de;white-space:nowrap}.course-price small{font:600 8px/1.2 ui-sans-serif;color:#9aabba}.shop-card h3{font-size:14px;letter-spacing:-.3px;margin:16px 0 7px}.shop-card p{font-size:9px;line-height:1.55;color:#8fa0af;margin:0 0 15px}.shop-card .course-footer{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px;border-top:1px solid var(--line);padding-top:12px}.course-access{font-size:8px;color:#91a7b8}.course-access.owned{color:#80d7b3}.course-access.free{color:#e8b19d}.tiny-buy{border:1px solid #566b7e;background:#f2ede4;color:#172232;border-radius:8px;padding:8px 10px;font-size:8px;font-weight:800}.tiny-buy:hover{background:#fff}.tiny-buy:disabled{opacity:.5;cursor:not-allowed}
.auth-split{display:grid;grid-template-columns:1fr 1fr;gap:14px}.auth-pane{border:1px solid var(--line);border-radius:12px;padding:14px}.auth-pane h3{font-size:13px;margin:0 0 5px}.auth-pane p{font-size:8px!important;margin-bottom:12px!important}.auth-pane .input{width:100%;margin:4px 0}.auth-pane .btn{width:100%;justify-content:center;margin-top:6px}
.order-list{display:grid;gap:7px;margin-top:12px}.order-row{display:grid;grid-template-columns:1fr auto;gap:9px;border-top:1px solid var(--line);padding-top:9px}.order-row b,.order-row span{font-size:8px}.order-row small{display:block;color:var(--muted);font-size:7px;margin-top:2px}.order-status{border-radius:999px;border:1px solid #3d5266;padding:4px 7px;text-transform:lowercase}.order-status.paid{color:#82d7b5;border-color:#28604d}.order-status.pending{color:#f0c287;border-color:#705731}.order-status.failed,.order-status.cancelled,.order-status.refunded{color:#e39999;border-color:#6d3b3b}.pay-box{border:1px solid #41617a;background:#0b1c2e;border-radius:12px;padding:13px;margin:13px 0}.pay-total{display:flex;justify-content:space-between;align-items:flex-end;gap:10px}.pay-total b{font:700 26px/1 Georgia,serif}.payment-note{font-size:8px!important;color:#8398aa!important}.promo-row{display:flex;gap:7px}.promo-row .input{flex:1}.owned-ribbon{position:absolute;right:12px;top:12px;font-size:7px;color:#77d3ad;border:1px solid #2f6d58;border-radius:999px;padding:4px 7px;background:#0c281f}
.paywall{max-width:720px;margin:30px auto;border:1px solid #435f78;background:#102039;border-radius:16px;padding:24px}.paywall h2{font:700 30px/1.05 Georgia,serif;margin:8px 0}.paywall p{font-size:10px;line-height:1.65;color:#94a6b5}.paywall .price{font:700 25px/1 Georgia,serif;color:#f2ded4;margin:16px 0}.site-maintenance{max-width:700px;margin:70px auto;text-align:center;padding:26px;border:1px solid var(--line);border-radius:16px;background:#102039}.site-maintenance h1{font:700 32px Georgia,serif}
@media(max-width:1050px){.course-shop-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:820px){.shop-hero{grid-template-columns:1fr}.shop-copy{padding:24px}.shop-principles{padding:22px}.sidebar .brand{position:static}.sidebar{height:100dvh}.account-btn{min-height:34px;padding:0 9px}}
@media(max-width:560px){.course-shop-grid{grid-template-columns:1fr}.auth-split{grid-template-columns:1fr}.shop-copy h1{font-size:38px}.shop-copy{padding:20px}.course-price{font-size:22px}.account-btn{max-width:84px;overflow:hidden;text-overflow:ellipsis}.top-actions #focusBtn{display:none}}


/* Trial access */
.trial-pill{display:inline-flex;align-items:center;min-height:34px;padding:0 12px;border-radius:999px;border:1px solid #b76a50;background:#fff4ec;color:#7c3826;font-size:9px;font-weight:800}
.owned-ribbon.trial{color:#f0c18c;border-color:#7b5a2f;background:#2a2012}
.trial-account{margin:14px 0;padding:13px;border:1px solid #38536b;background:#0b1c2e;border-radius:12px;display:grid;gap:7px}.trial-account b{font-size:11px}.trial-account span{font-size:8px;line-height:1.55;color:#96aabc}.trial-account.active{border-color:#35705a;background:#0b241c}.trial-account.active b{color:#8adebb}

.site-footer{margin-top:28px;padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(180deg,#0e1a2a,#0b1624)}.site-footer-top{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;flex-wrap:wrap}.site-footer-brand{display:flex;align-items:center;gap:12px}.site-footer-brand img{width:40px;height:40px;border-radius:50%;object-fit:cover}.site-footer h3{margin:0 0 6px;font-size:15px}.site-footer p{margin:0;color:var(--muted);font-size:10px;line-height:1.6;max-width:780px}.site-footer-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.footer-link{height:34px;padding:0 12px;border-radius:10px;border:1px solid var(--line2);background:#13243a;color:#dfe8f2;font-size:10px;font-weight:800;display:inline-flex;align-items:center;justify-content:center}.footer-link:hover{background:#17304d}.legal-article{padding:20px}.legal-article h1{font-size:28px;letter-spacing:-1px;margin:0 0 10px}.legal-article p{font-size:11px;line-height:1.75;color:#d5dfec;margin:0 0 12px}.faq-list{display:grid;gap:12px}.faq-item{padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.faq-item h3{margin:0 0 8px;font-size:14px}.faq-item p{margin:0;font-size:10px;line-height:1.7;color:var(--muted)}@media(max-width:820px){.site-footer-top{display:block}.site-footer p{max-width:none}}

/* v8 — CodeFlow logo-matched graphite + green theme */
:root{--bg:#0b0d0c;--panel:#111512;--panel2:#151a16;--panel3:#1a211b;--line:#283029;--line2:#39453a;--text:#f5f7f5;--muted:#a1aaa2;--muted2:#6f7970;--accent:#59c75f;--accent2:#77dc7d;--blue:#59c75f;--purple:#70d877;--ok:#67d96d;--bad:#ff6f7f;--warn:#e4c86a;--orange:#59c75f;--control-track:#263027;--control-fill:#59c75f;--control-thumb:#f3f6f3;--shadow:0 24px 70px rgba(0,0,0,.38)}
body{background:radial-gradient(circle at 76% -12%,rgba(89,199,95,.10),transparent 32%),var(--bg)}
.sidebar{background:#0d100e;border-color:var(--line)}.sidebar .brand{background:#0d100e}.brand-logo{box-shadow:0 0 0 2px rgba(89,199,95,.24),0 0 28px rgba(89,199,95,.08)}
.nav-label{color:#687269}.nav-btn{color:#a5ada6}.nav-btn>span{color:#737d74}.nav-btn:hover{background:#171d18}.nav-btn.active{background:#1d2a1f;color:#fff}.nav-btn.active>span{color:var(--accent)}
.sidebar-foot{background:#121713;border-color:#29322a}.bar{background:#242c25}.bar i{background:var(--accent)}
.topbar{background:rgba(11,13,12,.91);border-color:var(--line)}.search-box input,.icon-btn{background:#121713;border-color:#2a342b}.search-box input:focus{border-color:#4d7f50}.search-box kbd{background:#181e19;border-color:#354238}.search-results{background:#141915;border-color:#354238}.search-result:hover{background:#1d251e}
.status-pill{color:#93e297;background:#122016;border-color:#315b34}.account-btn{border-color:#314332;background:#121a13;color:#edf5ee}.account-btn:hover{border-color:#4d7f50;background:#18231a}.account-btn.signed{color:#b7f1ba;border-color:#3d6d40;background:#142017}
.hero-main{background:linear-gradient(135deg,#151a16,#0f1210)}.hero-main h1 span,.eyebrow{color:var(--accent)}.card,.hero-side,.map-node,.curriculum,.lesson-shell,.faq-item{background:var(--panel);border-color:var(--line)}
.path-card:hover,.feature-card:hover{border-color:#48604b}.path-icon{background:#1a211b}.skill{background:#172019;border-color:#28372a}.map-node.current{border-color:#59c75f;box-shadow:0 0 0 2px rgba(89,199,95,.08)}
.lesson-item:hover{background:#19221a}.lesson-item.active{background:#202a21}.lesson-item.done .lesson-num{background:#172619;color:var(--accent)}
.btn.primary{background:var(--accent);color:#09100a}.btn.primary:hover{background:#70d876}.btn.secondary{background:#19231a;color:#eef5ee;border-color:#314333}.btn.secondary:hover{border-color:#4b684e;background:#202d22}.btn.ghost{border-color:#313a32;color:#b8c0b9}
input:focus,select:focus,textarea:focus{border-color:#4d7f50!important}input[type="range"]::-webkit-slider-runnable-track{background:linear-gradient(90deg,#3a7d3e,var(--accent))}
*{scrollbar-color:#3d6b40 #0d100e}*::-webkit-scrollbar-track{background:#0d100e}*::-webkit-scrollbar-thumb{background:#315d35;border-color:#0d100e}*::-webkit-scrollbar-thumb:hover{background:#438149}
.shop-hero{background:#eff3ef;color:#121713;border-color:#303a31}.shop-copy .eyebrow{color:#337638}.shop-copy p{color:#5d675e}.shop-principles{background:#152119;color:#eef8ef}.plain-list div{color:#b8c7b9}.price-filter button{background:#141b15;color:#c9d5ca}.price-filter button.active{background:var(--accent);color:#0b100c;border-color:var(--accent)}
.shop-card{background:#111713}.shop-card:hover{border-color:#426a45}.shop-card.featured{box-shadow:inset 0 3px 0 var(--accent)}.course-kind{color:#8ab58d}.course-price{color:#f0f6f0}.course-access.owned{color:#79db7f}.course-access.free{color:#aab4ab}.tiny-buy{background:var(--accent);color:#0b100c;border-color:var(--accent)}.tiny-buy:hover{background:#75dc7a}
.pay-box,.paywall,.site-maintenance{background:#111713;border-color:#344737}.owned-ribbon{color:#89df8e;border-color:#3b7240;background:#122016}.owned-ribbon.trial{color:#a7eba9;border-color:#467b49;background:#152419}.trial-pill{border-color:#4e8d53;background:#eaf8eb;color:#235f27}.trial-account{border-color:#38523a;background:#111b13}.trial-account.active{border-color:#4b8750;background:#122016}.trial-account.active b{color:#8ae090}
.site-footer{background:linear-gradient(180deg,#111713,#0e120f);border-color:#29322a}.footer-link{background:#151d16;border-color:#334235;color:#e1e8e2}.footer-link:hover{background:#1d291f;border-color:#4c6d4f}.week i{background:#171c18;border-color:#2c352d}.heat.on,.chart-bar,.mastery-bar i{background:var(--accent)!important}::selection{background:#59c75f;color:#071008}