/* vumio academy: shared structure, independently tuned light and dark palettes. */
:root{--ink:#26364d;--green:#3865ad;--muted:#6c7c91;--paper:#f3f6fa;--line:#dde5ef;--surface:#fff;--field:#f9fbfd;--soft:#edf2fa;--danger:#b3444a;--error-bg:#fff0ef;--sidebar:#fbfcfe;--tile-blue:#dce9fb;--tile-ink:#5d8ed2;--nav-active:#e8effc;--header:#ffffffed;--hero:#193b68;--shadow:0 3px 16px #1c365505;--rule:transparent;color-scheme:light}
:root[data-theme=dark]{--ink:#e5edf7;--green:#9bbdf2;--muted:#9aadbf;--paper:#0e1825;--line:#25364c;--surface:#152234;--field:#111e2f;--soft:#1b2c43;--danger:#f1a2a9;--error-bg:#452a38;--sidebar:#0b1420;--tile-blue:#1b3557;--tile-ink:#7aa7e5;--nav-active:#1b2c47;--header:#0e1928f2;--hero:#162f52;--shadow:none;color-scheme:dark}
body{background:var(--paper);background-image:none;font-family:'Segoe UI',sans-serif}.workspace{padding-left:224px}.sidebar{background:var(--sidebar);border-color:var(--line);padding-top:27px}.sidebar .brand{font-size:28px}.brand small{font-size:10px;letter-spacing:.3px}.brand-symbol{width:39px;height:39px}.sidebar-label{font-size:9px;letter-spacing:1.1px;margin-top:40px}.sidebar nav{gap:8px}.nav-icon{width:19px;height:19px;flex:none;display:block}.nav-item{font-size:13px;gap:13px;padding:13px 12px;border-radius:7px}.nav-item span{display:initial;width:auto;font-size:inherit}.nav-item.is-current{background:var(--nav-active);box-shadow:inset 2px 0 #729bdf;color:var(--ink)}.nav-item:hover{background:var(--soft)}.nav-icon{color:var(--muted)}.is-current .nav-icon{color:var(--green)}.sidebar-note{font:13px/1.65 'Segoe UI',sans-serif;padding:22px 15px;border:1px solid var(--line);background:var(--soft);border-radius:9px;margin:48px 0 0;color:var(--muted)}.notebook-lines{width:27px;height:22px;border-color:#89a8d6;transform:none;margin-bottom:12px}.site-header{background:var(--header);padding:17px 36px;min-height:78px;border-color:var(--line)}.workspace-label{color:var(--muted);font-size:12px}.workspace-label span{font-size:11px}.header-actions{gap:16px}.account-name{display:flex;align-items:center;gap:9px;font-size:12px;max-width:220px}.account-avatar{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--soft);color:var(--green);font-size:13px;border:1px solid var(--line)}main{padding:30px 36px 56px;max-width:1500px}.page-heading:after{display:none}h1{font-size:32px;font-weight:650;letter-spacing:-.7px}h2{font-size:20px;font-weight:650;letter-spacing:-.35px}h3{font-size:16px}.eyebrow{font-size:9px;letter-spacing:1.5px}.feature,.empty,.login-card,.search-toolbar,.form-paper{border-color:var(--line);background:var(--surface);box-shadow:var(--shadow);border-radius:10px}.button,.primary{border:1px solid #386cbd;background:#386cbd;color:#fff;border-radius:7px;padding:11px 17px;box-shadow:none;font-size:12px;font-weight:600}.button:hover,.primary:hover{background:#2b5aa4;border-color:#2b5aa4}.quiet{border-radius:7px;background:var(--soft);border-color:var(--line);color:var(--ink);font-size:12px}.quiet:hover{background:var(--nav-active)}.danger{background:#a23d47;border-color:#a23d47}.danger:hover{background:#88313a}.danger-outline{background:transparent;border-color:var(--danger);color:var(--danger)}.pill,.badge{border-radius:5px;font-size:10px;background:var(--soft);color:var(--green)}.notice{background:var(--soft);color:var(--ink);border-color:var(--line)}input,textarea,select{background:var(--field);color:var(--ink)}.form-paper{border-top:1px solid var(--line)}.form-paper h1{font-size:27px}.course-tabs{gap:24px;padding-bottom:14px}.course-tabs a{font-size:12px}.course-tabs a:hover{color:var(--ink)}.curriculum-section .section-heading{background:var(--soft);border-radius:9px 9px 0 0}.section-number{font:600 13px 'Segoe UI',sans-serif;display:grid;place-items:center;width:30px;height:30px;border-radius:6px;background:var(--surface);color:var(--green);border:1px solid var(--line)}.lesson-list li{padding-top:17px;padding-bottom:17px}.course-description{font-size:13px}.paper-empty{border-left:2px solid #7f9ec8}.course-settings{border-top:1px solid var(--line)}.action-menu[open]>div{box-shadow:0 12px 30px #0002;border-radius:8px}.theory-preview,.login-card{border-top:1px solid var(--line)}.dashboard-stats{background:transparent;border:0;gap:14px;margin:22px 0 26px}.dashboard-stats .feature{background:var(--surface);border:1px solid var(--line);border-radius:9px;padding:18px 22px;flex-direction:row;align-items:center;gap:14px;line-height:1.4}.dashboard-stats .feature:last-child{border-right:1px solid var(--line)}.dashboard-stats strong{font-size:26px;color:var(--green)}
.study-hero{position:relative;overflow:hidden;background:var(--hero);border:1px solid #36577d;border-radius:12px;padding:32px 34px;min-height:250px;display:flex;align-items:center;margin:0 0 22px!important;color:#f4f7fc}.hero-copy{position:relative;z-index:1;max-width:70%}.study-hero .eyebrow{color:#b5c9e7;font-size:9px}.study-hero h1{font-size:clamp(25px,2.5vw,36px);line-height:1.23;letter-spacing:-.8px;margin:12px 0;color:#f4f7fc}.study-hero h1 span{color:#a9c9f4}.study-hero p{font-size:13px;line-height:1.65;color:#d0dcef;margin:12px 0 20px}.hero-button{display:inline-flex;align-items:center;gap:24px;background:#eef4fe;color:#25528f;border-color:#eef4fe;padding:9px 14px;border-radius:7px}.hero-button span{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;color:#fff;background:#4779c6;line-height:1;font-size:16px}.hero-button:hover{background:#fff;border-color:#fff;color:#214c87}.hero-art{position:absolute;inset:0 0 0 45%;background:url('study-geometry.svg') no-repeat right center;background-size:auto 100%;opacity:.8;pointer-events:none}.teacher-layout{grid-template-columns:minmax(0,1fr) 284px;gap:22px}.dashboard-aside{display:grid;gap:18px}.quick-panel,.review-panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px;box-shadow:var(--shadow)}.quick-panel h2,.review-panel h2{font-size:16px;margin:0 0 16px}.quick-panel>p{font-size:11px;color:var(--muted);line-height:1.7;margin:16px 0 0}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.quick-grid a{display:flex;align-items:flex-start;gap:7px;text-decoration:none;font-size:11px;line-height:1.5;padding:11px 9px;background:var(--soft);border:1px solid var(--line);border-radius:6px;color:var(--ink)}.quick-grid a:hover{border-color:var(--green)}.quick-grid .nav-icon{width:15px;height:15px;color:var(--green);margin-top:1px}.review-panel .help{font-size:12px}.review-panel .empty{border-radius:0;background:transparent;box-shadow:none}.review-panel .empty p{font-size:12px}.review-panel h3{font-size:14px}.search-toolbar{padding:15px;margin-bottom:22px}.search-toolbar label{font-size:11px;color:var(--muted)}.search-toolbar input:not([type=hidden]),.search-toolbar select{font-size:12px;padding:9px}.search-toolbar .quiet{font-size:11px}.search-toolbar>a{font-size:11px}.list-heading{font-size:19px}.course-cards{gap:16px}.course-cards .feature{border-top:1px solid var(--line)}.feature.course-tile{padding:0;overflow:hidden;box-shadow:none;border-radius:10px}.course-tile-body{padding:18px}.course-tile h2{font-size:17px;line-height:1.4;margin:10px 0 8px}.course-tile .eyebrow{font-size:8px;letter-spacing:1px}.course-tile p{font-size:12px;margin:8px 0}.course-tile .help{font-size:11px;border-color:var(--line);padding-top:12px;margin-top:14px}.course-tile .toolbar{gap:12px;font-size:11px;padding-top:12px;margin-top:13px}.course-cover{height:120px;background:var(--tile-blue);color:var(--tile-ink);border-bottom:1px solid var(--line)}.course-cover svg{display:block;width:100%;height:100%}.cover-lines{stroke:currentColor;stroke-width:.5;opacity:.1}.cover-cube,.cover-orbits,.cover-book,.cover-graph{display:none}.cover-geometry .cover-cube,.cover-orbit .cover-orbits,.cover-pages .cover-book,.cover-grid .cover-graph{display:block}.cover-orbit{background:#e5e9f7;color:#7a85bb}.cover-pages{background:#ece9e2;color:#a1947f}.cover-grid{background:#e1efed;color:#71a49e}:root[data-theme=dark] .cover-orbit{background:#252e48;color:#929bcb}:root[data-theme=dark] .cover-pages{background:#303642;color:#b0b3c0}:root[data-theme=dark] .cover-grid{background:#193b43;color:#77b2b6}.dashboard-columns{gap:24px}.table-scroll{border-radius:9px}.intro h1{font-family:'Segoe UI',sans-serif;font-weight:650;font-size:52px;line-height:1.15;letter-spacing:-1.8px}.intro em{font-style:normal;color:var(--green)}.book{background:var(--soft);color:var(--green);border-color:var(--green);box-shadow:6px 8px 0 var(--line)}.note{background:var(--surface);color:var(--ink);border-radius:5px}.orbit{color:var(--green)}.help{border-color:var(--line)}footer{background:transparent;border-color:var(--line);color:var(--muted)}.account-avatar{font-variant:normal}.empty h3{font-weight:600}
@media(min-width:1500px){.course-cards{grid-template-columns:repeat(3,minmax(0,1fr))}.study-hero{min-height:280px}.study-hero h1{font-size:38px}}
@media(max-width:1180px){.teacher-layout{grid-template-columns:1fr}.dashboard-aside{grid-template-columns:1fr 1fr}.hero-art{opacity:.5;left:45%}.hero-copy{max-width:78%}.dashboard-stats .feature{flex-direction:column;align-items:flex-start;gap:6px}.review-panel{margin:0}.quick-grid{gap:8px}.sidebar{width:200px}.workspace{padding-left:200px}}
@media(max-width:760px){.workspace{padding-left:0}.sidebar{width:auto;padding:16px 20px;position:static}.sidebar-note,.sidebar-label{display:none}.sidebar nav{gap:5px;margin-top:16px}.nav-item{font-size:11px;padding:10px 11px;gap:8px}.nav-item .nav-icon{width:16px;height:16px}.sidebar .brand{font-size:26px}.sidebar .brand-symbol{width:34px;height:34px}.site-header{padding:12px 20px;min-height:60px}.account-name{max-width:170px;font-size:11px}.account-avatar{width:27px;height:27px;font-size:11px}.header-actions{gap:8px}.header-actions .quiet{font-size:10px;padding:7px 9px}main{padding:22px 20px 44px}.study-hero{padding:25px 23px;min-height:240px;border-radius:10px}.study-hero h1{font-size:28px}.hero-copy{max-width:100%}.hero-art{left:30%;opacity:.2}.study-hero p{font-size:12px}.study-hero p br{display:none}.dashboard-aside{grid-template-columns:1fr}.dashboard-stats{gap:8px;flex-wrap:wrap;margin:18px 0 22px}.dashboard-stats .feature{padding:14px 11px;font-size:10px;min-width:84px}.dashboard-stats strong{font-size:23px}.course-cards{grid-template-columns:1fr}.course-cover{height:130px}.course-tile-body{padding:18px}.teacher-layout{gap:20px}.page-heading h1{font-size:27px}.course-tabs{gap:18px}.course-tabs a{font-size:12px}.course-description{font-size:12px}.form-paper{padding:24px 18px}.intro h1{font-size:42px}.quick-grid a{font-size:12px;padding:13px}.section-title h2{font-size:19px}.search-toolbar{padding:13px}.sidebar nav{scrollbar-width:thin}.account-name .account-avatar{display:grid}.public-page .site-header .header-actions{width:auto}.student-hero h1{font-size:26px}}

.course-tile:nth-child(4n+2) .course-cover{background:#e5e9f7;color:#7a85bb}.course-tile:nth-child(4n+3) .course-cover{background:#ece9e2;color:#a1947f}.course-tile:nth-child(4n+4) .course-cover{background:#e1efed;color:#71a49e}.course-tile:nth-child(4n+2) .cover-cube,.course-tile:nth-child(4n+3) .cover-cube,.course-tile:nth-child(4n+4) .cover-cube{display:none}.course-tile:nth-child(4n+2) .cover-orbits,.course-tile:nth-child(4n+3) .cover-book,.course-tile:nth-child(4n+4) .cover-graph{display:block}:root[data-theme=dark] .course-tile:nth-child(4n+2) .course-cover{background:#252e48;color:#929bcb}:root[data-theme=dark] .course-tile:nth-child(4n+3) .course-cover{background:#303642;color:#b0b3c0}:root[data-theme=dark] .course-tile:nth-child(4n+4) .course-cover{background:#193b43;color:#77b2b6}