/* NEXUS Curiosity · Research-backed visual and motion system.
   All content is visible without animation. No motion is an access requirement. */
:root{--bg:#0d0f1b;--panel:#161a2b;--raised:#1e2438;--line:#30364c;--text:#f5f4fc;--muted:#b0b5cc;--purple:#bcabfb;--cyan:#a8dfd0;--green:#b6e5c4;--pink:#f1b5cb;--radius:20px;--sidebar:226px;--ease:cubic-bezier(.2,.8,.2,1);--quick:160ms;--enter:320ms;--accent:#d5ec94;color-scheme:dark}
body{background:var(--bg);font-family:'Avenir Next',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;font-size:15px;line-height:1.65}h1,h2,h3{font-weight:730;letter-spacing:-.04em}h1 em,.hero h1 em{color:#b5a0f2;font-style:normal}button,.button{min-height:44px;border-radius:12px;border-color:#454a63;background:#202639;padding:11px 18px;transition:background var(--quick),border-color var(--quick),transform var(--quick) var(--ease);font-size:14px}button:hover,.button:hover{background:#2a3146;border-color:#8990b4}button:active,.button:active{transform:translateY(1px)}button:disabled{transform:none}button.primary,.button.primary{background:var(--accent);color:#202820;border:1px solid var(--accent);font-weight:760;box-shadow:none}button.primary:hover,.button.primary:hover{background:#e5f6b7;border-color:#e5f6b7}.quiet{background:transparent;border-color:transparent}.quiet:hover{background:#ffffff09}.small{min-height:38px;padding:8px 11px}.text-link{color:#cabdf4;text-decoration:none}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.brand{font-size:25px;letter-spacing:.19em;font-weight:760;gap:13px}.brand-star{font-size:47px;line-height:.7;color:#d9c9ff;letter-spacing:0;display:inline-block}.brand img{display:none}.field>span{font-size:13px;font-weight:540;color:#d3cee8;margin-bottom:6px}input,select,textarea{border-radius:12px;border-color:#45495f;background:#131a2a;color:var(--text);font-size:15px}input:not([type=checkbox]):not([type=radio]),select{min-height:47px}input::placeholder,textarea::placeholder{color:#979db5;opacity:1}input:focus,textarea:focus,select:focus{border-color:#bcabfb;box-shadow:0 0 0 3px #bcabfb19}input,textarea,select{max-width:100%}.field{margin-bottom:20px}.field small{font-size:12px;line-height:1.55}.checkbox{line-height:1.45}.checkbox input{accent-color:#bdacf5}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #d5ec94;outline-offset:4px}.auth-error:empty{display:none}.auth-error:not(:empty){background:#392135;border:1px solid #7d4b65;padding:12px 14px;border-radius:12px;color:#ffcfdd;margin:12px 0;line-height:1.6}.icon{stroke-width:1.7}button:disabled{opacity:.6}.development-note{color:#bac1d2;border-left:2px solid #817596;padding:5px 12px;font-size:11px;margin-bottom:18px}
/* Arrival: an editorial illustrated welcome, not a stack of dashboard cards. */
.arrival{min-height:100svh;background:radial-gradient(ellipse at 17% 66%,#29223866,transparent 48%),#0d0f1b;overflow:clip}.arrival-header{display:flex;align-items:center;gap:24px;padding:32px 48px;max-width:1700px;margin:auto}.arrival-wordmark-note{font-size:10px;letter-spacing:.32em;color:#ddd8ed}.arrival-utilities{margin-left:auto;display:flex;align-items:center;gap:18px}.arrival-utilities button{font-size:13px;color:#d0c7eb;gap:8px}.arrival-utilities .icon{width:19px}.arrival-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(360px,.9fr);gap:46px;max-width:1700px;margin:auto;padding:14px 52px 28px 48px;align-items:start}.arrival-story{min-width:0;position:relative;padding-top:3px}.arrival-story h1{font-size:clamp(40px,4.25vw,72px);letter-spacing:-.04em;line-height:1.06;margin:0 0 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#afa0ee38;border-radius:50%;width:80%;height:64%;top:2%;left:8%;transform:rotate(-18deg);pointer-events:none}.orbit-two{width:60%;height:55%;left:20%;top:13%;transform:rotate(20deg);border-color:#d7e8a328}.scene-star{position:absolute;font-size:26px;line-height:1;color:#d3c8ff;z-index:2;pointer-events:none}.star-one{right:10%;top:8%;color:#d5ec94}.star-two{left:11%;top:11%;font-size:18px}.star-three{right:2%;bottom:21%;font-size:18px;color:#98d9c8}.arrival-principles{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 15px 8px;margin-top:0;position:relative;z-index:3}.arrival-principles>span{display:flex;align-items:center;gap:12px;font-size:13px;color:#eae5f6}.arrival-principles>span+.arrival-principles>span{border-left:1px solid #414359}.arrival-principles .icon{color:var(--accent);width:24px;height:24px}.arrival-form{width:100%;max-width:460px;margin:22px auto 0;padding:0 0 10px;min-width:0;outline:none}.arrival-form-title{margin:34px 0 27px}.arrival-form h2{font-size:29px;line-height:1.22;letter-spacing:-.035em;margin-bottom:10px}.arrival-form-title p{font-size:17px;color:#bcb0e1;line-height:1.6;max-width:420px}.role-switch{display:grid;grid-template-columns:1fr 1fr;border:1px solid #585069;border-radius:30px;background:#111321;padding:4px;gap:4px}.role-switch button{border:0;background:transparent;color:#c1b1ee;border-radius:26px;min-height:49px;gap:10px;font-size:15px;font-weight:650}.role-switch button[aria-pressed=true]{background:#b7a0f4;color:#1e1734;box-shadow:0 0 30px #ac82ff20}.role-switch .icon{width:24px;height:24px}.role-switch button:focus-visible{outline-offset:3px}.arrival-staff{--accent:#b3e3d1}.arrival-staff .role-switch button[aria-pressed=true]{background:#b3e3d1;color:#122b27}.arrival-staff h1 em{color:#b3e3d1}.arrival-staff .arrival-subtitle,.arrival-staff .arrival-form-title p{color:#c0d8d0}.arrival-staff .arrival-principles .icon{color:#b3e3d1}.arrival-form .school-summary{padding:0 0 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.outlined{border-color:#77718e;border-radius:17px;background:transparent;color:#d9cef2;font-weight:600;min-height:55px}.arrival-form .outlined:hover{background:#231f34}.arrival-form .login-divider{max-width:none;margin:24px 0;font-size:11px;color:#aaa0bc;gap:12px}.arrival-form .login-divider:before,.arrival-form .login-divider:after{background:#454055}.arrival-form .arrival-help{font-size:12px;color:#b7accb;text-align:center;margin:26px 0 0}.arrival-footnote{margin:36px 0 0;text-align:center;font-size:11px;color:#9892ad}.arrival-form .private-device{font-size:12px;align-items:start;margin:4px 0 12px}.arrival-form .private-device small{font-size:11px;margin-top:5px;color:#aebbbd}.arrival-form .access-code-input{font-size:25px}.auth-context{display:flex;align-items:center;gap:10px;color:#d8c8f5;min-height:53px;border-bottom:1px solid #373548;padding-bottom:18px}.verified-password{font-size:13px;background:#18352e;border-color:#426858}.arrival-form .actions{gap:8px}.arrival-form .small-note{font-size:12px}.arrival .skip:focus{z-index:200}.arrival-utilities button:disabled{opacity:1;color:#b7becb}.arrival-form:focus{outline:none}
/* Shared workspaces, with genuinely different destinations for each role. */
.sidebar{padding:32px 17px 20px;background:#101320;border-color:#2a2c40}.sidebar .brand{padding-left:9px;font-size:23px}.sidebar .brand-star{font-size:36px}.workspace-label{font-size:9px;letter-spacing:.17em;color:#a9a0bf;margin:30px 10px 17px}.sidebar nav{gap:6px}.nav-link{padding:13px 13px;min-height:46px;font-size:13px;line-height:1.5;border-radius:12px;gap:12px;color:#b1b4c8}.nav-link:hover{background:#202236;color:#fff}.nav-link.active{background:#2a2443;color:#ece0ff}.nav-link.active:before{display:none}.nav-link.active .icon{color:#cdb7ff}.sidebar-bottom{margin-top:auto;padding-top:22px}.sidebar-bottom .nav-link{font-size:12px}.school-identity{display:flex;align-items:center;gap:10px;border-top:1px solid #2e3043;padding:18px 10px 0;margin-top:12px;color:#b1bac4;font-size:10px;line-height:1.5}.school-identity .icon{color:#b0d6c8;width:18px}.journey{margin:0 0 22px;padding:17px;border:1px solid #383448;background:#1b1b2e;border-radius:16px}.journey 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.hero-copy{max-width:58%;z-index:3}.hero .hero-copy h1{font-size:clamp(36px,3.8vw,54px);letter-spacing:-.055em;line-height:1.08;margin-bottom:17px;color:#fcf8ff}.hero .hero-copy p{font-size:15px;color:#c5bdd7;line-height:1.8;margin-bottom:0;max-width:410px}.hero .hero-copy .actions{margin-top:24px;gap:20px}.hero .text-link{font-size:12px}.hero .mini-scene{position:absolute;right:-35px;bottom:-32px;width:54%;max-width:630px;margin:0;aspect-ratio:975/640;height:auto;z-index:1}.hero .mini-scene .island-art{mask-image:linear-gradient(to right,transparent,#000 15%,#000 94%,transparent);opacity:.95}.hero .scene-orbit{display:none}.hero .scene-star{font-size:20px}.hero .star-one{top:1%;right:20%}.hub-progress{display:flex;align-items:center;gap:30px;flex-wrap:wrap;padding:24px 4px;margin-bottom:12px}.hub-progress>div{display:flex;gap:8px;align-items:center;font-size:11px;color:#b0b7cb}.hub-progress strong{font-size:17px;color:#eeebf7}.hub-progress .icon{color:#baa6ed;width:18px;height:18px}.next-lesson{border:1px solid #3d3a57;background:#171b2b;border-radius:20px;grid-template-columns:1fr 270px}.next-main{padding:28px}.section-kicker{font-size:10px;letter-spacing:.15em;font-weight:600;color:#bdb0dc;margin-bottom:12px}.next-main h2{font-size:25px}.next-main p{font-size:14px;max-width:590px}.next-main .primary{font-size:13px;min-height:44px}.next-aside{border-color:#3c3651;padding:27px;background:#1d1e31}.next-aside h3{font-size:19px;color:#e0d3f8}.next-aside p{font-size:12px}.next-aside progress{height:5px;background:#3a344b}.section-head{margin:33px 0 19px}.section-head h2{font-size:24px;letter-spacing:-.035em}.section-head p{font-size:12px;color:#b0b5ca}.studio-spotlights{display:grid;grid-template-columns:repeat(3,1fr);gap:19px}.studio-spotlight{border-radius:18px;overflow:hidden;border:1px solid #393446;background:#1b1b2e;transition:transform 180ms var(--ease),border-color 180ms}.studio-spotlight img{width:100%;height:150px;object-fit:cover;display:block;background:#242a3f}.studio-spotlight>div{padding:20px 21px;position:relative}.studio-spotlight span{color:#b5adcd;font-size:11px}.studio-spotlight h3{font-size:21px;margin:5px 24px 0 0}.studio-spotlight .icon{position:absolute;right:20px;bottom:24px;color:#d3c5f8}.spotlight-1{background:#18262b}.spotlight-2{background:#24232c}.unit-card{padding:24px;min-height:230px;border-color:#323a4b;background:#151b2a}.unit-card .ghost-number{color:#30344a}.unit-card h3{font-size:19px;max-width:85%}.unit-card p{font-size:12px;color:#adb5c9}.unit-card .icon{margin-bottom:21px;color:#c0aced}.panel{background:#171c2c;border-color:#343b50;border-radius:20px}.page-title h1{font-size:34px}.page-title p{font-size:14px;line-height:1.8;color:#b6bfd1}.page-footer{color:#a6adc3;font-size:10px;border-color:#2d3347;line-height:1.6}.teacher-hero{background:#182827!important;border-color:#354f45!important}.teacher-hero h1 em{color:#b3e3d1}.teacher-hero .hero-copy p{color:#c2d2ca}.teacher-hero-art .island-art{mask-image:linear-gradient(to right,transparent,#000 25%,#000 90%,transparent)}.teacher-hero-art .mini-scene{width:46%;right:-12px;bottom:-46px;opacity:.72}.teacher-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:23px 0 28px}.teacher-stats>a{display:flex;align-items:center;gap:16px;border-bottom:1px solid #38483f;padding:14px 8px 20px}.teacher-stats>a>.icon:first-child{width:25px;height:25px;color:#b3e3d1}.teacher-stats>a>.icon:last-child{margin-left:auto;width:16px;color:#a7b7b2}.teacher-stats strong{font-size:29px;line-height:1.1;display:block;font-weight:650}.teacher-stats span{font-size:12px;color:#b3c5be;display:block;margin-top:7px}.teacher-board{display:grid;grid-template-columns:1.15fr 1fr;gap:23px}.teacher-board>.panel{background:#162027;border-color:#34403e;padding:25px}.attention-panel>.section-head{margin:0 0 15px}.attention-panel h2{font-size:22px;max-width:330px}.queue-clear{padding:27px 0 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button{border-radius:13px;min-height:51px}.step-tabs button[aria-selected=true]{background:#302743;border-color:#a38abd;color:#eee1ff}.lesson-body{border-color:#3d3651;background:#181b2b}.lesson-body .prose{font-size:16px;line-height:1.95;color:#d9d9e8}.lesson-body .worked{background:#232137;border-color:#6b5886}.lesson-body .code-editor{background:#0f1522;border:1px solid #575371;line-height:1.75;font-size:14px;border-radius:12px}.lesson-rail .panel{background:#141c29}.table-scroll{position:relative}.table-scroll table{font-size:13px}.table-scroll th{font-size:11px;color:#b3c4d1;font-weight:600}.table-scroll td{padding:17px 14px}.modal{background:#1a2031;border:1px solid #625472;border-radius:22px;box-shadow:0 35px 100px #0009}.modal h2{font-size:26px}.modal .field{margin-bottom:19px}.modal-backdrop{backdrop-filter:blur(7px)}.security-page{max-width:910px}.mfa-page{max-width:980px;padding:50px 25px;margin:auto}.mfa-page>.panel{padding:36px}.mfa-page .brand{margin-bottom:28px}.mfa-page h1{font-size:36px}.mfa-qr{background:#fff}.studio-tile{overflow:hidden;border-radius:16px}.notice{font-size:13px;line-height:1.75}.reduce-motion .island-art{animation:none}.full-width{width:100%}
/* Compositor-friendly decorative motion. Never moves labels or form controls. */
@keyframes island-drift{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
@media(hover:hover) and (pointer:fine){.studio-spotlight:hover{transform:translateY(-4px);border-color:#a191b7}.unit-card:hover{transform:translateY(-3px);border-color:#a191b7}.unit-card{transition:transform 180ms var(--ease),border-color 180ms}.teacher-stats>a:hover,.class-control>a:hover{background:#ffffff04}}
.motion-paused [data-ambient],.reduce-motion [data-ambient],html[data-page-hidden=true] [data-ambient]{animation-play-state:paused!important}.motion-paused *,.motion-paused *::before,.motion-paused *::after,.reduce-motion *,.reduce-motion *::before,.reduce-motion *::after{scroll-behavior:auto!important;transition:none!important}.motion-paused .unit-card:hover,.motion-paused .studio-spotlight:hover,.reduce-motion .unit-card:hover,.reduce-motion .studio-spotlight:hover{transform:none}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.unit-card:hover,.studio-spotlight:hover{transform:none!important}}
/* No new interaction depends on hover; laptop, tablet, phone and zoom layouts. */
@media(min-width:1550px){.arrival-layout{gap:80px}.arrival-form{max-width:470px;margin-top:38px}.arrival-header{padding-bottom:38px}.arrival-form-title{margin-top:40px}.arrival-form h2{font-size:31px}}
@media(max-width:1200px){:root{--sidebar:206px}.arrival-layout{grid-template-columns:minmax(0,1.3fr) minmax(330px,1fr);gap:30px;padding:18px 35px 28px}.arrival-header{padding:30px 35px}.arrival-story h1{font-size:49px}.arrival-wordmark-note{display:none}.arrival-form{margin-top:8px}.arrival-form h2{font-size:27px}.arrival-principles{gap:13px;padding-left:0}.arrival-principles>span{font-size:11px;gap:6px}.arrival-principles .icon{width:19px}.arrival-subtitle{font-size:18px}.curiosity-scene{margin-top:40px}.topbar{padding:0 25px}.topbar .motion-control span{display:none}.topbar .class-select{width:176px}.content{padding:25px}.hero .hero-copy h1{font-size:42px}.hero .hero-copy .actions{gap:13px}.hero .hero-copy{max-width:63%}.hero .mini-scene{width:50%;right:-40px;bottom:-18px}.hero.student-hero,.hero.teacher-hero{padding:30px;min-height:320px}.hero .hero-copy .text-link{display:block}.hub-progress{gap:18px}.teacher-board{grid-template-columns:1fr}.teacher-stats{gap:12px}.next-lesson{grid-template-columns:1fr 220px}.next-main,.next-aside{padding:23px}.studio-spotlight img{height:120px}.studio-spotlight>div{padding:17px}.studio-spotlight h3{font-size:18px}.teaching-shelf{align-items:start}.teacher-board>.panel{padding:24px}}
@media(max-width:950px){.arrival-header{padding:24px 28px}.arrival-utilities{gap:8px}.arrival-layout{grid-template-columns:minmax(0,1fr) minmax(315px,1fr);padding:18px 28px 25px;gap:23px}.arrival-story h1{font-size:39px}.arrival-subtitle{font-size:16px}.arrival-principles{flex-wrap:wrap;justify-content:start;row-gap:12px}.arrival-form-title p{font-size:15px}.arrival-form-title{margin-top:26px}.arrival-form .arrival-footnote{margin-top:25px}.content{padding:23px}.hero .mini-scene{opacity:.6;right:-60px;width:57%}.hero .hero-copy{max-width:78%}.hero .hero-copy h1{font-size:40px}.next-lesson{grid-template-columns:1fr}.next-aside{border-left:0;border-top:1px solid #3c3651;display:block}.studio-spotlights{gap:13px}.studio-spotlight>div{padding:16px}.studio-spotlight h3{font-size:17px}.studio-spotlight .icon{right:12px;bottom:20px;width:16px}.teacher-stats span{font-size:10px}.teacher-stats>a{gap:9px}.teacher-stats>a>.icon:last-child{display:none}.topbar>.row{gap:10px}.topbar .class-select{width:145px}.breadcrumb{display:none}.hero .hero-copy p{font-size:14px}.gentle-label{display:none}.teaching-shelf{flex-direction:column}.teaching-shelf .actions{max-width:none}}
@media(max-width:760px){:root{--sidebar:0px}.arrival-header{padding:22px 22px 18px;gap:10px}.arrival-header .brand{font-size:22px;gap:9px}.arrival-header .brand-star{font-size:37px}.arrival-utilities{gap:5px}.arrival-utilities button{padding:8px;min-height:40px}.arrival-utilities [data-action=login-help] span{display:none}.arrival-utilities .motion-control span{font-size:10px}.arrival-layout{display:flex;flex-direction:column;padding:5px 25px 30px;gap:0}.arrival-story{width:100%;padding-top:18px}.arrival-story h1{font-size:clamp(32px,6.5vw,46px);max-width:500px;margin-bottom:12px}.arrival-subtitle{font-size:17px;margin-bottom:14px}.arrival-story .curiosity-scene{display:none}.arrival-principles{display:none}.arrival-form{margin:12px auto 0;max-width:510px;padding:0}.role-switch{max-width:100%;padding:4px}.role-switch button{font-size:14px;min-height:43px}.arrival-form-title{margin:23px 0 19px}.arrival-form h2{font-size:25px}.arrival-form-title p{font-size:14px;margin-bottom:0}.arrival-form .field{margin-bottom:16px}.arrival-form .school-summary{margin-bottom:10px;padding-bottom:7px;gap:9px}.arrival-form .school-summary strong{font-size:12px}.arrival-form .full-width{min-height:51px;font-size:15px}.input-icon>input{min-height:50px;font-size:16px}.arrival-form .login-divider{margin:19px 0}.arrival-form .arrival-help{margin-top:22px;font-size:12px}.arrival-form .arrival-footnote{margin-top:20px}.arrival-form .private-device small{font-size:12px}.arrival-form .auth-context{min-height:44px;font-size:13px}.topbar{height:66px;padding:0 16px;position:sticky;z-index:25}.topbar>.row{gap:9px}.topbar .class-select{width:min(42vw,205px);max-width:205px}.topbar .user-pill>span{display:none}.topbar .motion-control{min-width:38px;padding:7px}.topbar .avatar{width:31px;height:31px;font-size:10px}.mobile-menu{display:inline-flex;min-height:40px;padding:8px}.sidebar{width:248px;padding:30px 19px 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@media(max-width:380px){.arrival-header{padding:20px 17px}.arrival-header .brand{font-size:19px;gap:8px}.arrival-header .brand-star{font-size:31px}.arrival-utilities{gap:0}.arrival-utilities button{padding:7px}.arrival-utilities .motion-control span{font-size:9px}.arrival-layout{padding:0 19px 24px}.arrival-story h1{font-size:32px}.arrival-subtitle{font-size:14px}.arrival-form h2{font-size:23px}.arrival-form-title p{font-size:13px}.role-switch button{font-size:13px;gap:7px}.arrival .brand-note{display:none}.content{padding:20px 16px}.hero.student-hero,.hero.teacher-hero{padding:26px 20px}.hero .hero-copy h1{font-size:35px}.hero .hero-copy .actions{gap:15px}.hero .hero-copy .button{font-size:12px;max-width:100%}.topbar{padding:0 11px;gap:7px}.topbar>.row{gap:5px}.topbar .class-select{width:118px;font-size:10px}.topbar .motion-control{min-width:33px;padding:6px}.user-pill{display:none}.hub-progress{gap:16px;font-size:10px}.next-main h2{font-size:22px}.studio-spotlight h3{font-size:18px}.studio-spotlight>div{padding:20px 16px}.teacher-stats span{font-size:10px}.teacher-stats strong{font-size:25px}.teacher-stats{gap:10px}.course-toolbar select{min-width:110px}.large-text .arrival-form-title p,.large-text .arrival-help{font-size:15px}}

.planet-art{position:absolute;right:3%;top:-225px;width:165px;height:auto;z-index:0;pointer-events:none;mask-image:radial-gradient(ellipse,#000 53%,transparent 73%);animation:planet-drift 18s ease-in-out infinite}
@keyframes planet-drift{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-5px) rotate(2deg)}}
@media(max-width:1300px){.planet-art{display:none}}
@media(max-width:760px){.sidebar.open{z-index:40}.menu-scrim:not([hidden]){z-index:39}.sidebar-close{z-index:41}}