/* Mobile experience and lightweight motion. No layout depends on JavaScript. */
.mobile-nav,.mobile-brand{display:none}
html{scroll-padding-top:88px;scroll-behavior:smooth}
.button:active,.filter:active{transform:scale(.97)}
.progress span{transform-origin:left;animation:progress-in .8s ease-out both}
.reveal-in{animation:rise-in .6s cubic-bezier(.22,1,.36,1) both}
.hero.motion-active .planet{animation:planet-float 7s ease-in-out infinite}
.hero.motion-active .planet span{animation:star-turn 35s linear infinite}
.hero.motion-active .satellite{animation:satellite-float 5s ease-in-out infinite}
.hero.motion-active .spark{animation:star-glow 4s ease-in-out infinite alternate}
.hero.motion-active .chip-top{animation:chip-float 6s ease-in-out infinite}
.hero.motion-active .chip-bottom{animation:chip-float 6s ease-in-out -3s infinite;--tilt:-7deg}
.motion-paused *{animation-play-state:paused!important}
.filter.selected{animation:filter-in .22s ease-out}
@keyframes rise-in{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
@keyframes planet-float{0%,100%{transform:translate(-50%,-50%) rotate(-16deg)}50%{transform:translate(-50%,calc(-50% - 9px)) rotate(-10deg)}}
@keyframes star-turn{to{transform:rotate(360deg)}}
@keyframes satellite-float{50%{transform:translateY(-12px)}}
@keyframes chip-float{0%,100%{transform:translateY(0) rotate(var(--tilt,7deg))}50%{transform:translateY(-7px) rotate(var(--tilt,7deg))}}
@keyframes star-glow{from{opacity:.45}to{opacity:1}}
@keyframes progress-in{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@keyframes filter-in{from{transform:scale(.95)}to{transform:scale(1)}}

@media(max-width:768px){
 :root{--muted:#746c80}
 body{-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}
 .sidebar{display:none}
 .workspace{margin:0}
 .topbar{position:sticky;top:0;z-index:35;height:auto;min-height:72px;padding:calc(12px + env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) 12px max(20px,env(safe-area-inset-left));background:#f7f8faf2;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid #ebe7f080}
 .mobile-brand{display:flex;font-size:29px;letter-spacing:-1.6px;gap:9px;min-height:44px}
 .breadcrumb,.topbar .resource-link{display:none}
 .top-actions{gap:12px}
 .top-actions .avatar{height:44px;width:44px;border:3px solid #fff;font-size:16px;box-shadow:0 2px 10px #5438780b}
 .top-actions .button.small{border-radius:25px;min-height:44px;font-size:12px;padding:10px 17px}
 .mobile-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));position:fixed;z-index:50;bottom:0;left:0;right:0;gap:2px;padding:8px max(8px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));background:#fffffff5;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid #e8e2ef;box-shadow:0 -6px 24px #35204706}
 .mobile-nav-link{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-width:0;min-height:54px;color:#81788e;font-size:10px;font-weight:500;border-radius:12px}
 .mobile-nav-icon{display:grid;place-items:center;width:46px;height:29px;border-radius:12px;transition:background .2s,transform .2s}
 .mobile-nav-icon svg{width:21px;height:21px}
 .mobile-nav-link.active{color:#704cc4;font-weight:700}
 .mobile-nav-link.active .mobile-nav-icon{background:#eee7fa}
 .mobile-nav-link:active .mobile-nav-icon{transform:scale(.88);background:#eee7fa}
 main{padding:23px 20px calc(95px + env(safe-area-inset-bottom));max-width:640px;min-width:0}
 .page-heading{gap:12px;margin-bottom:23px}
 h1{font-size:clamp(26px,7vw,34px);letter-spacing:-1.2px;line-height:1.25;overflow-wrap:anywhere}
 .page-heading p{font-size:13px;line-height:1.65;max-width:36ch}
 .eyebrow{font-size:9px;letter-spacing:1.3px;line-height:1.7}
 .date-pill{display:none}
 .wave{font-size:26px}
 .hero{min-height:0;border-radius:24px;background:linear-gradient(135deg,#7958d7,#6844c6);isolation:isolate}
 .hero-content{width:100%;padding:25px 24px 23px}
 .hero-pill{font-size:7px;letter-spacing:1.1px;padding:7px 9px}
 .hero h2{font-size:clamp(30px,8.6vw,43px);line-height:1.12;letter-spacing:-1.35px;margin:20px 0 15px}
 .hero p{font-size:12px;line-height:1.7;max-width:28ch;margin-bottom:22px;color:#efe7ff}
 .hero p br{display:none}
 .hero .button{font-size:12px;width:100%;min-height:49px;gap:12px;padding:13px 12px;border-radius:12px;margin:0}
 .hero-note{font-size:9px;line-height:1.5;margin-top:14px;color:#e5d9fc}
 .hero-visual{inset:15px -58px auto auto;width:185px;height:280px;opacity:.32;z-index:-1;pointer-events:none}
 .hero-visual .planet{left:75%;top:48%;width:110px;height:110px}
 .hero-visual .planet span{font-size:83px}
 .hero-visual .floating-chip,.hero-visual .spark,.hero-visual .coordinate,.hero-visual .satellite{display:none}
 .hero-visual .ring-one{width:270px;height:155px}.hero-visual .ring-two{width:195px;height:275px}.hero-visual .ring-three{width:240px;height:185px}
 .stats{margin:18px 0 31px;padding:18px 0;border-radius:18px;box-shadow:0 4px 12px #3b275003}
 .stats>div{flex-direction:column;align-items:flex-start;gap:10px;padding:0 13px;min-width:0}
 .stat-icon{height:31px;width:31px;border-radius:10px}.stats strong{font-size:25px}
 .stats div div>span{font-size:10px;line-height:1.5;margin-top:6px}.stat-detail{display:none}
 .section-heading{align-items:flex-end;gap:12px;margin-bottom:18px}
 .section-heading h2{font-size:23px;max-width:240px;line-height:1.3;letter-spacing:-.8px}
 .section-heading .text-link{font-size:11px;line-height:1.6;max-width:82px;min-height:44px;flex-shrink:0}
 .section-heading .text-link svg{width:15px}
 .featured-courses{display:flex;overflow-x:auto;gap:14px;margin:0 -20px;padding:2px 20px 18px;scroll-snap-type:x mandatory;scroll-padding-inline:20px;scrollbar-width:none}
 .featured-courses::-webkit-scrollbar{display:none}
 .featured-courses>.course-card{flex:0 0 84%;scroll-snap-align:start;height:auto;max-width:355px}
 .course-grid:not(.catalog-grid)>.course-card:last-child{display:block}
 .catalog-grid{grid-template-columns:1fr;gap:18px}
 .course-card{border-radius:20px;padding:8px}.course-card:hover{transform:none}
 .course-art{height:175px;border-radius:14px}.art-label{font-size:8px;padding:6px 9px}.art-caption{font-size:8px}
 .card-body{padding:17px 13px 14px}.card-meta{font-size:10px;margin-bottom:12px}.card-body h3{font-size:18px;line-height:1.4;margin-bottom:9px}.card-body p{font-size:13px;line-height:1.7;min-height:0;margin-bottom:17px}
 .card-foot,.card-foot strong{font-size:10px}.card-foot{padding-top:14px}.card-foot svg{width:13px;height:13px}
 .community-banner{margin:16px 0 0;padding:24px;border-radius:20px;display:block}
 .community-banner h2{font-size:23px;line-height:1.35;margin-bottom:12px}.community-banner p{font-size:13px}.community-banner .eyebrow{font-size:8px}
 .community-banner .button{font-size:13px;margin-top:20px;width:100%;min-height:48px}
 .footer{margin-top:28px;padding:22px 0 4px;gap:15px}.footer>span{font-size:10px}.footer>span:last-child{display:none}
 .catalog-tools{margin:23px 0}.search{max-width:none;border-radius:14px;margin-bottom:17px;min-height:52px}.search input{font-size:16px}
 .filters{flex-wrap:nowrap;overflow-x:auto;gap:8px;margin:0 -20px;padding:3px 20px 12px;scrollbar-width:none}.filters .filter{flex-shrink:0;min-height:44px;font-size:12px;padding:11px 16px}
 .filter{min-height:44px}.empty{padding:40px 20px}.empty h2{font-size:23px}.empty p{font-size:14px}
 .button,.button.small{min-height:48px;font-size:13px;border-radius:12px}.text-link{font-size:13px;min-height:44px}
 .panel{padding:22px;border-radius:18px}.panel p,.soft-panel p{font-size:14px}.panel h2{font-size:24px}
 .learning-layout,.community-layout,.profile-grid,.resource-grid{grid-template-columns:1fr;gap:0;min-width:0}
 .course-heading{margin-bottom:24px}.course-heading h1{font-size:29px}.course-heading p{font-size:14px}.course-mini-art{display:none}.muted{font-size:12px;line-height:1.7}
 .back-link{min-height:44px;display:inline-flex;align-items:center;font-size:13px;margin-bottom:14px}
 .lesson{padding:24px 21px}.lesson h2{font-size:26px;line-height:1.35}.lesson>p{font-size:16px;line-height:1.85;color:#63596d}
 .lesson .button{width:100%;min-height:52px}.outcomes li{font-size:14px;gap:10px}.outcomes svg{margin-top:4px}
 .exercise{padding:20px 18px}.exercise p{font-size:14px;line-height:1.85}.exercise h3{font-size:17px}
 .quiz legend{font-size:17px;line-height:1.65}.answer{min-height:56px;font-size:14px;line-height:1.55;padding:15px 13px}.answer input{width:20px;height:20px;flex-shrink:0}
 .lesson-sidebar{display:block}.lesson-list a,.lesson-list li>div{min-height:54px;font-size:13px;padding:14px 10px}.reading{float:none;display:block;margin-top:8px;font-size:9px}
 .resource-card{padding:17px}.resource-cover{height:195px}.resource-card h2{font-size:23px}.resource-card p{font-size:14px;min-height:0}.resource-card .eyebrow{font-size:10px}.resource-card .button{min-height:50px}
 .composer label{font-size:15px;line-height:1.6}.composer textarea{font-size:16px;line-height:1.7;min-height:145px}.composer-bottom{align-items:flex-start;flex-direction:column}.composer-bottom .muted{font-size:11px}.composer-bottom .button{width:100%}
 .post-author{font-size:13px}.post-author time{font-size:11px}.post-text{font-size:15px;line-height:1.85}.post summary{font-size:13px;min-height:44px;line-height:1.7}.subtle{min-height:44px;font-size:12px}.comment{font-size:13px}.comment-form{flex-wrap:wrap}.comment-form input{flex-basis:100%;font-size:16px;min-height:50px}.comment-form .button{width:100%}
 .page-heading:has(form){flex-direction:column;align-items:flex-start}.page-heading:has(>.pill){flex-wrap:wrap}
 .form-stack label{font-size:14px;margin-bottom:21px}.form-stack input{font-size:16px;padding:15px;min-height:52px}.form-stack>.button{width:100%}
 .auth-layout{display:block;min-height:100dvh;padding-bottom:env(safe-area-inset-bottom)!important}
 .auth-story{padding:calc(24px + env(safe-area-inset-top)) 26px 27px;border-radius:0 0 30px 30px}
 .auth-story .brand{font-size:29px}.auth-story h1{font-size:32px;line-height:1.16;letter-spacing:-1.2px;margin:23px 0 13px}.auth-story h1 br{display:none}.auth-story h1 em{display:block}.auth-story p{font-size:13px;line-height:1.7;margin:0;max-width:34ch}.auth-story .auth-orbit,.auth-story>small{display:none}
 .auth-main{padding:29px 25px 36px}.auth-back{min-height:44px;display:flex;align-items:center;font-size:13px;margin-bottom:15px}.auth-box h2{font-size:27px}.auth-box>p{font-size:14px}.auth-tabs a{min-height:45px;font-size:14px}.auth-note{font-size:12px!important}
 .notice{font-size:14px;line-height:1.7}.table-wrap{max-width:100%}
}
@media(max-width:359px){main{padding-left:16px;padding-right:16px}.hero-content{padding:23px 19px}.hero h2{font-size:29px}.hero .button{font-size:11px;gap:7px}.mobile-nav-link{font-size:9px}.section-heading h2{font-size:21px}.stats>div{padding:0 10px}.stats div div>span{font-size:9px}.featured-courses{margin-inline:-16px;padding-inline:16px}.featured-courses>.course-card{flex-basis:91%}}
@media(max-width:359px){.filters{margin-inline:-16px;padding-inline:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.reveal-in{opacity:1;transform:none}}
@media print{.mobile-nav,.mobile-brand{display:none!important}}