.tutorial-page{background:#f7f9fc;color:#203047}.learn-main{max-width:1320px;margin:auto;padding:146px 40px 28px}.learn-intro{text-align:left}.learn-intro h1{font-size:42px;font-weight:600;letter-spacing:-1.5px;line-height:1.15;margin:0}/* A single selection bar; filled blue and a checkmark identify the current tutorial. */
.lesson-picker{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:4px;margin:24px 0 28px;padding:6px;border:1px solid #dce4ee;border-radius:17px;background:#fff}
.lesson-picker a{display:flex;justify-content:center;align-items:center;gap:7px;min-height:46px;padding:10px 8px;border:1px solid transparent;border-radius:11px;color:#506279;font-size:13px;font-weight:500;line-height:1.3;white-space:nowrap;transition:background .15s,color .15s}
.lesson-picker a:hover{background:#edf3fc;color:#285fac}
.lesson-picker .lesson-selected-check{display:none;font-size:14px;line-height:1}
.lesson-picker a[aria-current="page"]{color:#fff;background:#346dca;border-color:#346dca;box-shadow:0 3px 8px #346dca24}
.lesson-picker a[aria-current="page"] .lesson-selected-check{display:block}
.mobile-lesson-picker{display:none}
.lesson-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 16px}.lesson-heading h2{font-size:23px;letter-spacing:-.5px;margin:0}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px;align-items:start}.demo-frame{min-width:0;border:1px solid #dce4ee;border-radius:20px;overflow:hidden;background:white;box-shadow:0 18px 40px #2c4b7908}.demo-chrome{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:16px 20px;border-bottom:1px solid #e6ebf2;font-size:12px;color:#5c6d83}.demo-dots{letter-spacing:3px;color:#c7d3e3;font-size:10px}.demo-label{font-size:10px;background:#eef4fc;padding:5px 8px;border-radius:6px}.demo-stage{position:relative;isolation:isolate;overflow:hidden;background:#f5f7fb;min-height:390px}.demo-disclaimer{font-size:11px;line-height:1.45;text-align:center;color:#68788c;padding:12px;margin:0;border-top:1px solid #e6ebf2}.tutorial-spotlight{position:absolute;z-index:4;border:2px solid #3975d4;border-radius:12px;box-shadow:0 0 0 1200px #23364a25,0 0 0 5px #659bff26;pointer-events:none;transition:left .4s ease,top .4s ease,width .4s ease,height .4s ease}.step-card{background:#fff;border:1px solid #dce4ee;border-radius:20px;padding:22px;min-height:300px;display:flex;flex-direction:column}.step-top{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px;color:#52657e}.quiet-button{border:0;background:transparent;color:#3768a6;padding:8px 0;font-size:12px;min-height:36px}.quiet-button:hover{text-decoration:underline}.step-card progress{appearance:none;width:100%;height:4px;border:0;border-radius:8px;overflow:hidden;margin:10px 0 20px;background:#eaf0f8}.step-card progress::-webkit-progress-bar{background:#eaf0f8}.step-card progress::-webkit-progress-value{background:#659bff;transition:width .3s}.step-card progress::-moz-progress-bar{background:#659bff}.step-card h3{font-size:25px;line-height:1.2;letter-spacing:-.5px;margin:0 0 12px}.step-card p{font-size:14px;line-height:1.45;color:#5c6e85;margin:0 0 14px}.step-card .step-tip{font-size:12px;margin:10px 0 0;padding:0;line-height:1.45}.step-actions{display:flex;gap:12px;align-items:center;margin-top:auto;padding-top:8px}.step-actions .button{font-size:13px;padding:12px 20px;min-height:44px;margin-left:auto;gap:10px}.lesson-back{border:0;background:transparent;color:#476487;padding:12px 4px;font-size:13px}.lesson-back:disabled{opacity:.4;cursor:default}.lesson-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;border-top:1px solid #e5ebf3;margin-top:20px;padding-top:8px;font-size:12px;color:#3768a6}.learn-footer{max-width:1320px;margin:auto;padding:25px 40px 35px;border:0;font-size:12px;color:#738197}.learn-footer>div{font-size:12px}.demo-workspace{display:grid;grid-template-columns:126px minmax(0,1fr);min-height:390px}.demo-sidebar{background:#fff;border-right:1px solid #e3e9f2;padding:23px 14px;font-size:12px;display:flex;align-items:stretch;flex-direction:column;gap:18px}.demo-sidebar strong{font-size:12px}.demo-sidebar span{color:#728197;font-size:10px;letter-spacing:normal}.demo-button{border:1px solid #d5dfef;background:white;color:#345780;border-radius:9px;padding:10px 12px;font-size:12px;min-height:40px;line-height:1.4}.demo-button.primary{background:#4d86e7;border-color:#4d86e7;color:white}.demo-button:hover{filter:brightness(.96)}.demo-button:focus-visible,.demo-field input:focus-visible{outline-offset:3px}.demo-content{padding:23px 20px;min-width:0}.demo-content h3{font-size:19px;letter-spacing:-.5px;margin:0}.demo-toolbar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:24px}.demo-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.demo-photo{background:#fff;border:1px solid #e0e7f1;border-radius:12px;overflow:hidden;position:relative;text-align:left;color:#3c536e;padding:0;min-width:0}.demo-photo img{display:block;width:100%;height:150px;object-fit:cover}.demo-photo>span{display:block;padding:11px;font-size:12px}.demo-photo input{position:absolute;top:10px;left:10px;width:20px;height:20px;accent-color:#3975d4}.demo-panel{max-width:440px;margin:24px auto;background:#fff;border:1px solid #e0e7f1;border-radius:16px;padding:24px}.demo-panel h3{font-size:20px;letter-spacing:-.5px;margin:0 0 15px}.demo-panel p{font-size:12px;line-height:1.45;color:#63738a}.demo-panel>.demo-button{width:100%;margin-top:12px}.demo-field{display:flex;flex-direction:column;gap:8px;font-size:12px;color:#556c86;margin:16px 0}.demo-field input{min-width:0;width:100%;border:1px solid #ccd8e9;border-radius:8px;padding:11px;font:inherit;background:white;color:#263d5b}.demo-field input[type=range]{padding:0;accent-color:#3975d4;min-height:28px}.demo-drop{border:1px dashed #99b8e6;background:#f3f7fe;border-radius:12px;text-align:center;padding:26px 12px}.demo-drop strong{font-size:17px}.demo-drop small{display:block;font-size:10px;color:#6a7f99;margin-top:16px}.demo-view{max-width:410px;margin:auto;padding:22px}.demo-view h3{font-size:18px;margin:0 0 16px}.demo-view .demo-button{margin-top:13px}.demo-image{display:block;width:100%;height:230px;object-fit:cover;border-radius:9px}.demo-actions{display:flex;gap:10px;flex-wrap:wrap}.demo-actions .demo-button{flex:1}.demo-compare{position:relative;overflow:hidden;border-radius:10px;--split:50%}.demo-compare img{display:block;width:100%;height:225px;object-fit:cover}.demo-compare .demo-before{position:absolute;inset:0;clip-path:inset(0 calc(100% - var(--split)) 0 0)}.demo-compare::after{content:'↔';position:absolute;top:50%;left:var(--split);transform:translate(-50%,-50%);border-radius:50%;background:#fff;color:#3469c5;width:34px;height:34px;display:grid;place-items:center;pointer-events:none}.demo-compare input{position:absolute;inset:0;opacity:0;width:100%;height:100%;margin:0;cursor:ew-resize}.demo-compare:focus-within{outline:3px solid #275bbd;outline-offset:3px}.demo-caption{display:flex;justify-content:space-between;font-size:10px;color:#62738a;margin-top:8px}.demo-success{text-align:center;padding:55px 28px;max-width:450px;margin:auto}.success-mark{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:#e2efff;color:#3469c5;font-size:26px;margin:0 auto 18px}.demo-success h3{font-size:24px;letter-spacing:-.7px}.demo-success p{font-size:14px;line-height:1.45;color:#657891}.demo-success img{height:125px;width:165px;object-fit:cover;border:5px solid white;border-radius:12px;box-shadow:0 8px 24px #26406014;transform:rotate(-3deg)}

@media(max-width:1050px){.learn-main{padding-left:24px;padding-right:24px}.lesson-layout{grid-template-columns:minmax(0,1fr) 300px;gap:16px}.step-card{padding:20px}.demo-workspace{grid-template-columns:105px minmax(0,1fr)}.demo-content{padding:20px 14px}.demo-sidebar{padding:20px 10px}.lesson-picker{grid-template-columns:repeat(3,1fr)}}
@media(max-width:780px){.learn-main{padding:124px 20px 24px}.lesson-layout{grid-template-columns:1fr}.step-card{min-height:0}.step-card progress{margin-bottom:18px}.lesson-heading{align-items:flex-start}.demo-stage,.demo-workspace{min-height:355px}.demo-panel{margin:20px auto;max-width:calc(100% - 40px)}.demo-view{padding:20px}.step-card h3{font-size:23px}.lesson-picker{gap:4px;margin:20px 0 24px}.lesson-picker a{font-size:12px;padding:10px}.lesson-heading h2{font-size:22px}.learn-footer{padding:20px;gap:16px}.learn-footer>div{margin:0}.demo-photo img{height:135px}}
@media(max-width:400px){.learn-main{padding-left:14px;padding-right:14px}.lesson-heading{display:block}.demo-workspace{grid-template-columns:88px minmax(0,1fr)}.demo-content{padding:18px 12px}.demo-toolbar{flex-wrap:wrap;margin-bottom:16px}.demo-grid{gap:8px}.demo-photo img{height:105px}.demo-sidebar{font-size:11px;padding:18px 8px}.demo-sidebar .demo-button{font-size:11px;padding:8px}.demo-photo>span{padding:8px;font-size:10px}.lesson-picker a{font-size:11px}}
.demo-button:disabled{cursor:default;color:#6b7d94;background:#edf1f7;border-color:#dce4ef;filter:none}
.tutorial-scan-tools{display:flex;flex-wrap:wrap;gap:7px;padding:18px 22px 0}.tutorial-scan-tools button,.tutorial-file-label{font:inherit;font-size:11px;min-height:36px;border:1px solid #cddcef;border-radius:8px;background:#fff;color:#365c8b;padding:9px 11px;cursor:pointer}.tutorial-file-label{position:relative;overflow:hidden}.tutorial-file-label input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.tutorial-file-label:focus-within{outline:3px solid #275bbd;outline-offset:3px}.tutorial-scan-tools>span{font-size:11px;line-height:1.45;color:#63738a;flex-basis:100%}.prepared-tutorial-image{height:auto;max-height:430px;object-fit:contain}.demo-stage:has([data-tutorial-editor]){overflow:visible}.demo-stage:has([data-tutorial-editor]) .tutorial-spotlight{box-shadow:0 0 0 5px #659bff26;background:transparent;z-index:0}.demo-stage:has([data-tutorial-editor]) #demo-scene{position:relative;z-index:1}@media(min-width:781px){.step-card{position:sticky;top:24px}}

.step-note{margin:0 0 16px}.step-note summary{width:fit-content;cursor:pointer;font-size:12px;font-weight:500;color:#3768a6;line-height:1.4}.step-note summary:focus-visible{outline:3px solid #275bbd;outline-offset:4px}.step-note[hidden]{display:none}.tutorial-page .nav a[aria-current="page"]{color:#285fac;font-weight:600}.tutorial-page .nav-links a[aria-current="page"]{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}.tutorial-page .learn-footer{padding-top:16px}.tutorial-page .demo-label{letter-spacing:normal}
@media(max-width:1050px){.lesson-picker{grid-template-columns:repeat(3,minmax(0,1fr))}.lesson-picker a{font-size:13px}}
@media(max-width:780px){.learn-intro h1{font-size:34px;letter-spacing:-1px}.step-card h3{font-size:22px}.step-card{padding:20px}.tutorial-page .learn-footer{padding:16px 20px 28px}}
@media(max-width:600px){.lesson-picker{display:none}.mobile-lesson-picker{display:flex;flex-direction:column;gap:8px;margin:22px 0 24px;font-size:12px;font-weight:500;color:#596d86}.mobile-lesson-picker select{width:100%;font:inherit;font-size:15px;font-weight:600;color:#245cae;background:#fff;border:2px solid #659bff;border-radius:12px;min-height:50px;padding:10px 14px}.mobile-lesson-picker select:focus-visible{outline:3px solid #275bbd;outline-offset:3px}.lesson-heading h2{font-size:21px}.demo-disclaimer{padding:10px}.learn-main{padding-top:118px}}

.tutorial-page .pin-status,.tutorial-page .pin-hint,.tutorial-page .pin-warning p,.tutorial-page .pin-result p{line-height:1.4}