/* Final presentation layer. Existing component and authorization contracts stay intact. */
html:root{--bg:#f5f5f7;--surface:#fff;--surface-2:#f0f0f3;--surface-3:#e8e8ed;--text:#1d1d1f;--muted:#64646b;--line:#dedee3;--accent:#0071e3;--accent-2:#0066cc;--accent-ink:#fff;--shadow:0 12px 36px #0000000a;--shadow-soft:0 2px 8px #00000004;--radius-lg:20px;--radius-xl:24px;--nav-cover:rgba(255,255,255,.68);--nav-cover-border:rgba(255,255,255,.84)}
html[data-theme=dark]{--bg:#141416;--surface:#202023;--surface-2:#29292d;--surface-3:#343439;--text:#f5f5f7;--muted:#aaaab1;--line:#38383d;--accent:#2997ff;--accent-2:#64b5ff;--accent-ink:#07111f;--nav-cover:rgba(8,8,10,.72);--nav-cover-border:rgba(255,255,255,.13)}
body,button,input,select,textarea,body h1,body h2,body h3,body strong,body .brand{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif!important}body{background:var(--bg);color:var(--text);font-size:15px;-webkit-font-smoothing:antialiased}body h1{font-weight:650!important;letter-spacing:-.045em!important;line-height:1.12!important}body h2,body h3{font-weight:600!important;letter-spacing:-.025em!important}body .app-shell{background:var(--bg)!important}body .eyebrow{font-size:11px;letter-spacing:.09em;font-weight:600;color:var(--muted)}
body .btn{min-height:44px;border-radius:11px;font-weight:550;box-shadow:none!important;transition:background .18s,opacity .18s}body .btn:hover{transform:none;border-color:var(--line)}body .btn-primary{background:var(--accent)!important;color:var(--accent-ink)!important;border:0}body .btn:disabled{opacity:.5;cursor:not-allowed}body :focus-visible{outline:3px solid var(--accent);outline-offset:3px}body input:not([type=checkbox]),body select,body textarea{font-size:16px!important;background:var(--surface)!important;color:var(--text)!important;border:1px solid var(--line)!important;border-radius:10px!important}body .premium-ripple,body .premium-ripple-host:after{display:none!important}
body .quiet-workspace>.main-nav,body .quiet-workspace>.settings-nav,body .quiet-workspace>.sidebar,body .quiet-workspace>.pre-course-preferences{display:none!important}
body .quiet-workspace{padding:0!important;margin:0!important;min-height:100dvh}.quiet-sidebar{position:fixed;inset:0 auto 0 0;width:232px;padding:32px 16px 20px;background:var(--surface-2);border-right:1px solid var(--line);z-index:80;display:flex;flex-direction:column;gap:20px}.quiet-brand{display:flex;align-items:center;gap:12px;color:var(--accent);font-weight:700;font-size:32px;padding:0 12px 18px}.quiet-brand span{font-size:22px;color:var(--text);letter-spacing:-1px}.quiet-sidebar>small{padding:0 12px;font-size:10px;letter-spacing:.12em;color:var(--muted)}.quiet-sidebar nav,.quiet-account-nav{display:grid;gap:4px}.quiet-account-nav{border-top:1px solid var(--line);padding-top:18px}.quiet-link{display:flex;align-items:center;gap:12px;min-height:44px;padding:10px 12px;border-radius:14px;font-size:14px;color:var(--muted);transition:color .18s ease,background-color .18s ease,transform .14s ease,box-shadow .18s ease}.quiet-link:hover{background:var(--surface-3)}.quiet-link.selected{background:color-mix(in srgb,var(--accent) 10%,transparent);color:var(--accent);font-weight:600}.quiet-link svg,.quiet-person svg,.quiet-course-button svg{width:21px;height:21px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linejoin:round;stroke-linecap:round}.quiet-person{margin-top:auto;display:flex;align-items:center;gap:10px;text-align:start;border:0;background:transparent;padding:12px;color:var(--text)}.quiet-person small{display:block;color:var(--muted);font-size:11px;margin-top:5px}.quiet-toolbar{margin-left:232px;height:88px;padding:20px 40px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:var(--bg)}.quiet-toolbar small{display:block;color:var(--muted);font-size:11px;margin-bottom:5px}.quiet-toolbar strong{font-size:18px;font-weight:600}.quiet-toolbar-actions{display:flex;align-items:center;gap:16px}.quiet-course-button{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--muted)}.quiet-avatar{border:0;border-radius:50%;width:38px;height:38px;background:var(--surface-3);color:var(--text);font-weight:600}.bottom-nav,.quiet-return-button{display:none}body .quiet-workspace>.workspace-main{margin:0 0 0 232px!important;padding:32px 40px 60px!important;max-width:none!important;width:auto!important;min-height:calc(100dvh - 62px)}body .quiet-workspace>.sub-nav{position:relative!important;top:auto!important;left:auto;right:auto;z-index:70;margin:82px auto 0!important;width:min(720px,calc(100% - 264px))!important;height:auto!important;background:transparent!important;backdrop-filter:none;border:0;box-shadow:none!important;transform:none!important}body .quiet-workspace .sub-inner{position:relative;height:auto;min-height:52px;padding:6px 40px;justify-content:flex-start;direction:inherit;gap:8px;overflow:auto;scroll-padding-inline:12px;background:var(--nav-cover)!important;backdrop-filter:blur(26px) saturate(1.4);border:1px solid var(--nav-cover-border);border-radius:28px;box-shadow:0 10px 28px #00000012}body .sub-link{position:relative;background:transparent;box-shadow:none;border-radius:23px;font-size:13px;white-space:nowrap;min-height:40px}body .sub-link.active{background:transparent;color:var(--accent)}
body .suite-page,body .subjects-page,body .pre-course-page{max-width:1280px;width:100%;margin:0 auto;padding:0}body .suite-head,body .subjects-head{margin-bottom:28px;gap:20px}body .suite-head h1,body .subjects-head h1{font-size:34px}body .suite-head p,body .subjects-head p{font-size:14px;line-height:1.6;color:var(--muted)}body .suite-panel,body .suite-metric,body .course-card,body .panel-card,body .suite-setting-card,body .suite-note-card,body .suite-resource-card,body .suite-material-card,body .admin-stats article{background:var(--surface)!important;border:1px solid var(--line)!important;border-radius:18px!important;box-shadow:none!important;padding:22px}body .suite-panel h2,body .panel-card h2{font-size:18px}body .suite-metrics{gap:16px}body .suite-metric strong{font-size:30px}body .suite-dashboard-grid{gap:22px}body .course-active-hero,body .suite-course-hero,body .pre-course-hero{background:var(--surface)!important;color:var(--text)!important;box-shadow:none!important;border:1px solid var(--line)!important;border-radius:22px}body .pre-course-hero h1{color:var(--text)!important;font-size:40px}body .pre-course-hero p{color:var(--muted)!important}body .pre-course-actions .btn-ghost{color:var(--accent);border-color:var(--line)}body .pre-course-orbit{color:var(--accent);border-color:var(--line);background:var(--surface-2)}body .pre-course-stats article,body .pre-course-detail-grid article,body .pre-course-setting-grid article{background:var(--surface);border-color:var(--line);box-shadow:none}body .member-row,body .admin-row{gap:12px;flex-wrap:wrap}body .admin-table{overflow-x:auto}body .course-card p{line-height:1.65}body .subject-mini-action{opacity:1}body .suite-profile-card{background:var(--surface);box-shadow:none}
.quiet-dialog{width:min(420px,calc(100% - 32px));padding:24px;border:1px solid var(--line);border-radius:24px;background:var(--surface);color:var(--text);box-shadow:0 24px 90px #0003}.quiet-dialog::backdrop{background:#0005;backdrop-filter:blur(5px)}.quiet-dialog-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.quiet-dialog-head h2{margin:0;font-size:22px}.quiet-dialog-preferences{padding:16px 0}.quiet-dialog .btn{width:100%}.quiet-account-error{font-size:13px;color:var(--danger)}.quiet-skip{position:fixed;top:-100px;left:250px;z-index:999;background:var(--surface);padding:16px}.quiet-skip:focus{top:12px}
body .join-page{background:var(--bg);grid-template-columns:1fr 1fr}body .join-panel{background:var(--surface-2)!important;color:var(--text)!important}body .join-copy h1{font-size:clamp(36px,4vw,64px);line-height:1.1!important}body .auth-side{background:var(--bg)!important}body .auth-card{background:var(--surface)!important;border:1px solid var(--line);border-radius:24px;padding:32px;box-shadow:none!important;max-width:480px}body .auth-card h2{font-size:28px}body .auth-card>p{font-size:14px;line-height:1.6}body .auth-note{font-size:12px;line-height:1.6}body .auth-submit{width:100%}body .hero{padding-top:80px}body .hero h1{font-size:clamp(44px,6vw,80px);line-height:1.05!important}body .hero h1 span{color:var(--accent)}body .float-card{box-shadow:var(--shadow);transform:none}body .feature-card{box-shadow:none}body .landing-cta{background:var(--surface-2);color:var(--text)}
@media(min-width:768px) and (max-width:1199px){.quiet-sidebar{width:88px;padding:24px 10px}.quiet-brand{justify-content:center;padding:0 0 18px}.quiet-brand span,.quiet-sidebar>small,.quiet-sidebar .quiet-link span,.quiet-person span{display:none}.quiet-sidebar .quiet-link{justify-content:center;position:relative}.quiet-sidebar .quiet-link:hover span,.quiet-sidebar .quiet-link:focus-visible span{display:block;position:absolute;left:64px;background:var(--surface);padding:10px;box-shadow:var(--shadow);white-space:nowrap;border-radius:8px}.quiet-person{justify-content:center}.quiet-toolbar{margin-left:88px;padding:20px 28px}body .quiet-workspace>.workspace-main{margin-left:88px!important;padding:28px!important}body .quiet-workspace>.sub-nav{margin:82px auto 0!important;width:min(640px,calc(100% - 120px))!important}body .quiet-workspace .sub-inner{padding-inline:28px}.quiet-account-nav{gap:8px}body .entity-sheet{max-width:560px;margin:auto;border-radius:24px}body .suite-dashboard-grid{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr)}}
@media(max-width:767px){.quiet-sidebar{display:none}.quiet-toolbar{margin:0;height:76px;padding:14px 20px;padding-top:max(14px,env(safe-area-inset-top));position:sticky;top:0;z-index:70;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(18px)}.quiet-toolbar strong{font-size:20px}.quiet-toolbar small{max-width:230px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.quiet-course-button span{display:none}body .quiet-workspace>.workspace-main{margin:0!important;padding:24px 18px calc(76px + env(safe-area-inset-bottom))!important}body .quiet-workspace>.sub-nav{margin:72px auto 0!important;position:relative!important;top:auto!important;inset-inline:auto!important;width:min(640px,calc(100% - 20px))!important;z-index:70;background:transparent!important;backdrop-filter:none;border:0;border-radius:0;box-shadow:none!important}body .quiet-workspace .sub-inner{padding:8px 16px;flex-wrap:nowrap}body .suite-head h1,body .subjects-head h1{font-size:30px}body .suite-head-actions{display:flex;flex-wrap:wrap;gap:8px}body .suite-head-actions .btn{flex:initial;font-size:13px}body .suite-metrics{grid-template-columns:1fr 1fr!important;gap:10px}body .suite-metric{padding:16px!important}body .suite-metric strong{font-size:26px}body .suite-dashboard-grid,body .course-card-grid,body .subjects-grid{grid-template-columns:1fr!important}body .lectures-page .subject-card{min-height:110px!important;padding:18px!important}body .lectures-page .subject-card-top{margin-bottom:10px}body .suite-panel,body .panel-card{padding:18px!important}body .pre-course-hero{padding:24px!important}body .pre-course-hero h1{font-size:32px}body .entity-sheet-overlay{padding:0;align-items:flex-end}body .entity-sheet{width:100%;max-width:none;max-height:90dvh;overflow:auto;border-radius:24px 24px 0 0;padding-bottom:calc(24px + env(safe-area-inset-bottom))}.quiet-dialog{margin:auto 0 0;width:100%;max-width:100%;border-radius:24px 24px 0 0;padding-bottom:calc(24px + env(safe-area-inset-bottom))}body .join-page{display:block}body .join-panel{display:none!important}body .auth-side{min-height:100dvh;padding:28px 20px;border:0}body .auth-card{padding:0;border:0;background:transparent!important}body .field{margin-bottom:20px}body .field input,body .field select{height:52px}body .hero{display:flex;flex-direction:column;gap:20px;padding-top:44px}body .hero-visual{width:100%;min-height:360px}body .hero-proof{gap:12px}.quiet-skip{left:16px}body .panel-grid,body .panel-inline{display:flex;flex-direction:column;align-items:stretch}body .panel-grid>*{width:100%}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* One responsive shell: visible sidebar on larger screens, accessible drawer on phones. */
.quiet-sidebar{inset:0 auto 0 auto;inset-inline-start:0;overflow-y:auto;overscroll-behavior:contain;transition:transform .22s ease}
.quiet-sidebar-head,.quiet-toolbar-title{display:flex;align-items:center}.quiet-toolbar-title{gap:10px}
.quiet-sidebar-head{justify-content:space-between}
.quiet-sidebar-head .quiet-brand{padding-bottom:0}
.quiet-sidebar-close{display:none;width:40px;height:40px;padding:9px;border:0;border-radius:10px;background:transparent;color:var(--text)}
.quiet-sidebar-close svg,.quiet-menu-button svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.quiet-menu-button{display:grid;place-items:center;width:40px;height:40px;margin:0;border:0;border-radius:50%;background:var(--surface-2);color:var(--text)}
.quiet-menu-backdrop{display:none}
.quiet-opportunity-nav,.quiet-preferences{display:grid;gap:4px;border-top:1px solid var(--line);padding-top:14px}
.quiet-opportunity-nav>small{padding:0 12px 5px;font-size:10px;letter-spacing:.12em;color:var(--muted)}
.quiet-preferences .quiet-link{width:100%;border:0;background:transparent;text-align:start}
.quiet-person{margin-top:0}
.quiet-toolbar{margin-left:0;margin-inline-start:0;inset-inline-start:246px;inset-inline-end:14px}
body .quiet-workspace>.workspace-main{margin-left:0!important;margin-inline-start:232px!important}
.quiet-dialog-preferences{display:grid;gap:10px}
.quiet-workspace.quiet-sidebar-collapsed .quiet-sidebar{transform:translateX(-100%)}
[dir=rtl] .quiet-workspace.quiet-sidebar-collapsed .quiet-sidebar{transform:translateX(100%)}
.quiet-workspace.quiet-sidebar-collapsed .quiet-toolbar{inset-inline-start:14px}
body .quiet-workspace.quiet-sidebar-collapsed>.workspace-main{margin-inline-start:0!important}

@media(min-width:768px) and (max-width:1199px){
  .quiet-toolbar{margin-left:0;inset-inline-start:102px}
  body .quiet-workspace>.workspace-main{margin-left:0!important;margin-inline-start:88px!important}
  .quiet-opportunity-nav>small{display:none}
}

@media(max-width:767px){
  .quiet-sidebar{display:flex;width:min(86vw,320px);padding:20px 16px;z-index:120;transform:translateX(-105%);box-shadow:0 24px 80px #0004}
  [dir=rtl] .quiet-sidebar{transform:translateX(105%)}
  .quiet-workspace.quiet-menu-open .quiet-sidebar{transform:translateX(0)}
  .quiet-sidebar-close{display:grid;place-items:center}
  .quiet-menu-backdrop{position:fixed;inset:0;z-index:110;border:0;background:#0006;backdrop-filter:blur(3px)}
  .quiet-workspace.quiet-menu-open .quiet-menu-backdrop{display:block}
  .quiet-sidebar .quiet-brand span,.quiet-sidebar>small,.quiet-sidebar .quiet-link span,.quiet-person span{display:initial}
  .quiet-sidebar .quiet-link{justify-content:flex-start}
  .quiet-toolbar{margin-inline-start:0}
  .quiet-toolbar-title{min-width:0}
  .quiet-toolbar-title>div{min-width:0}
  .quiet-toolbar-actions{gap:10px}
  body .quiet-workspace>.workspace-main{margin-inline-start:0!important}
}

/* Tablet landing navigation is a dedicated side rail, not a resized top bar. */
@media(min-width:768px) and (max-width:1199px){
  .landing-page{padding-inline-start:108px}
  .landing-nav{position:fixed;inset-block:0;inset-inline-start:0;width:96px;height:100dvh;padding:18px 8px;display:grid;grid-template-columns:1fr;grid-template-rows:64px minmax(0,1fr) 56px;gap:14px;border:0;border-inline-end:1px solid var(--line);border-radius:0;background:color-mix(in srgb,var(--surface) 97%,transparent);box-shadow:1px 0 5px #00000012}
  .landing-nav .brand{justify-content:center;padding:0}
  .landing-nav .brand-name{display:none}
  .landing-nav .brand-mark{width:44px;height:44px;border-radius:50%}
  .landing-nav-tabs{width:100%;height:auto;display:grid;grid-template-columns:1fr;grid-template-rows:repeat(4,minmax(68px,1fr));align-self:center;justify-content:stretch;gap:7px}
  .landing-nav-link{min-width:0;flex-direction:column;gap:6px;padding:8px 3px;border-radius:13px;font-size:11px;line-height:1.15;text-align:center}
  
  .landing-nav-link.active{background:color-mix(in srgb,var(--accent) 10%,transparent)}
  .landing-nav-link.active::after{inset:8px auto 8px 0;inset-inline-start:0;width:3px;height:auto;border-radius:0 3px 3px 0}
  .landing-language{align-self:end;justify-self:center}
}


/* Shared icon and gesture primitives. */
.ui-icon{display:block;width:1.5rem;height:1.5rem;flex:none;overflow:visible;pointer-events:none}
.quiet-workspace,.quiet-workspace *{box-sizing:border-box}.quiet-workspace .workspace-main,.quiet-toolbar>*,.quiet-toolbar-title,.quiet-toolbar-title>div,.quiet-sidebar,.quiet-popover{min-width:0}.quiet-toolbar-title strong,.quiet-toolbar-title small,.quiet-link span,.quiet-course-button span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.quiet-link,.quiet-course-button,.quiet-avatar,.quiet-menu-button,.quiet-sidebar-close{-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:color .18s ease,background-color .18s ease,transform .14s ease,box-shadow .18s ease}.quiet-link .ui-icon,.quiet-course-button .ui-icon,.quiet-menu-button .ui-icon{transition:transform .18s cubic-bezier(.2,.8,.2,1),stroke-width .18s ease}.quiet-link:active,.quiet-course-button:active,.quiet-avatar:active,.quiet-menu-button:active{transform:scale(.94)}@media(hover:hover){.quiet-link:hover .ui-icon,.quiet-course-button:hover .ui-icon,.quiet-menu-button:hover .ui-icon{transform:translateY(-1px) scale(1.08)}.quiet-course-button:hover,.quiet-menu-button:hover{background:color-mix(in srgb,var(--accent) 10%,var(--surface));color:var(--accent);box-shadow:0 8px 22px #00000012}}
.quiet-popover-more .ui-icon,.quiet-course-list b .ui-icon{width:18px;height:18px}.subject-mini-action .ui-icon{width:19px;height:19px}.subject-add span,.subjects-empty-icon{display:grid;place-items:center}.subject-add .ui-icon,.subjects-empty-icon .ui-icon{width:24px;height:24px}.pre-course-setting-icon .ui-icon{width:28px;height:28px}.pre-course-nav .ui-icon,.pre-course-preferences .ui-icon,.settings-action .ui-icon,.side-action .ui-icon{display:inline-block;vertical-align:middle;width:20px;height:20px;margin-inline-end:8px}.side-action{display:flex;align-items:center;gap:10px}.side-action .ui-icon{margin:0}
.subject-swipe{--swipe-x:0px;position:relative;isolation:isolate;overflow:hidden;border-radius:22px;touch-action:pan-y;background:var(--surface-2)}.subject-swipe .subject-card{position:relative;z-index:2;width:100%;transform:translate3d(var(--swipe-x),0,0);transition:transform .24s cubic-bezier(.2,.8,.2,1);will-change:transform;touch-action:pan-y}.subject-swipe.is-dragging .subject-card{transition:none;user-select:none}.subject-swipe-action{position:absolute;z-index:1;top:0;bottom:0;width:92px;border:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;color:#fff;font:700 12px/1 inherit;cursor:pointer}.subject-swipe-action .ui-icon{width:23px;height:23px}.subject-swipe-action.edit{left:0;background:#1877f2}.subject-swipe-action.delete{right:0;background:#d92d20}.subject-action{display:none}
@media(min-width:1100px){.subject-swipe-action{display:none}.subject-swipe .subject-card{transform:none}}

/* Facebook-inspired navigation: centered icon tabs with compact action popovers. */
.quiet-toolbar{position:fixed;top:10px;z-index:100;height:62px;margin:0;padding:0 14px;display:grid;grid-template-columns:minmax(180px,1fr) minmax(360px,640px) minmax(180px,1fr);gap:14px;background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(24px);border:1px solid color-mix(in srgb,var(--line) 82%,transparent);border-radius:20px;box-shadow:0 10px 30px #00000012}
.quiet-desktop-tabs{position:relative;height:52px;padding:4px;display:grid;grid-template-columns:repeat(var(--nav-count,5),minmax(56px,1fr));align-items:stretch;background:var(--nav-cover);backdrop-filter:blur(26px) saturate(1.4);border:1px solid var(--nav-cover-border);border-radius:28px;box-shadow:0 10px 28px #00000012}
.quiet-desktop-tabs .quiet-link{position:relative;justify-content:center;min-height:48px;margin:6px 3px;padding:8px 18px;border-radius:23px;color:var(--muted)}
.quiet-desktop-tabs .quiet-link span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.quiet-desktop-tabs .quiet-link svg{width:27px;height:27px;stroke-width:1.8}
.quiet-desktop-tabs .quiet-link.selected{background:transparent;color:var(--accent);box-shadow:none}
.quiet-desktop-tabs .quiet-link.selected::after{display:none}
.quiet-toolbar-actions{position:relative;justify-self:end}
.quiet-course-button{justify-content:center;min-width:42px;height:42px;padding:0 13px;border:1px solid color-mix(in srgb,var(--line) 82%,transparent);border-radius:50px;background:var(--surface-2);color:var(--text);font-weight:650;box-shadow:0 4px 14px #0000000d}
.quiet-avatar{width:42px;height:42px;border:2px solid var(--surface);background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 82%,#fff),var(--accent));color:#fff;box-shadow:0 5px 16px color-mix(in srgb,var(--accent) 22%,transparent)}
.quiet-popover{position:absolute;top:calc(100% + 10px);inset-inline-end:0;width:min(360px,calc(100vw - 24px));max-height:min(620px,calc(100dvh - 88px));overflow:auto;overscroll-behavior:contain;padding:14px;border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--text);box-shadow:0 16px 48px #0003;z-index:160;text-align:start}
.quiet-course-popover{inset-inline-end:50px}.quiet-popover-head{display:flex;align-items:end;justify-content:space-between;padding:5px 5px 12px}.quiet-popover-head strong{font-size:18px}.quiet-popover-head small{color:var(--muted)}
.quiet-course-list{display:grid;gap:5px}.quiet-course-list>button{width:100%;display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:11px;padding:9px;border:0;border-radius:12px;background:transparent;color:var(--text);text-align:start}.quiet-course-list>button:hover{background:var(--surface-2)}.quiet-course-list>button>span:first-child{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:color-mix(in srgb,var(--course-color) 15%,var(--surface));color:var(--course-color)}.quiet-course-list>button span strong,.quiet-course-list>button span small{display:block}.quiet-course-list>button span small{margin-top:3px;color:var(--muted);font-size:11px}.quiet-course-list>button>b{color:var(--accent)}
.quiet-popover-more{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:9px;padding:11px;border-radius:10px;background:var(--surface-2);color:var(--accent);font-weight:650;text-align:center}.quiet-popover-signout{width:100%;margin-top:8px;padding:10px;border:0;background:transparent;color:#d93025;font-weight:650}.quiet-popover [role=status]{margin:7px 4px 0;color:var(--muted);font-size:12px}
.quiet-profile-summary{display:flex;align-items:center;gap:12px;padding:6px 4px 14px;border-bottom:1px solid var(--line)}.quiet-profile-summary>span{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--accent);color:#fff;font-size:20px;font-weight:700}.quiet-profile-summary strong,.quiet-profile-summary small{display:block}.quiet-profile-summary small{margin-top:4px;color:var(--muted)}.quiet-profile-popover dl{margin:12px 4px;display:grid;gap:9px}.quiet-profile-popover dl>div{display:flex;justify-content:space-between;gap:12px}.quiet-profile-popover dt{color:var(--muted)}.quiet-profile-popover dd{margin:0;max-width:62%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.quiet-sidebar{top:0}

/* One translucent navigation cover and one flat moving active indicator for every navigation state. */
.gel-nav{position:relative;isolation:isolate}
.gel-nav>.nav-gel{position:absolute;inset:0 auto auto 0;z-index:0;pointer-events:none;border:0;border-radius:24px;background:color-mix(in srgb,var(--accent) 16%,transparent);backdrop-filter:none;box-shadow:none;transform-origin:center;opacity:0}
.gel-nav-ready>.nav-gel{opacity:1;transition:transform .42s cubic-bezier(.22,1,.36,1),width .42s cubic-bezier(.22,1,.36,1),height .42s cubic-bezier(.22,1,.36,1),border-radius .28s ease,opacity .16s ease}
.gel-nav>.landing-nav-link,.gel-nav>.quiet-link,.gel-nav>.bottom-nav-item,.gel-nav>.sub-link{z-index:1;border-radius:23px}
.gel-nav>.landing-nav-link:not(.active):hover,.gel-nav>.quiet-link:not(.selected):hover,.gel-nav>.sub-link:not(.active):hover{background:transparent;color:var(--text)}
.gel-nav>.bottom-nav-item:not(.is-active):hover .bottom-nav-icon{background:transparent}
.gel-nav>.landing-nav-link.active,.gel-nav>.quiet-link.selected,.gel-nav>.bottom-nav-item.is-active,.gel-nav>.sub-link.active{background:transparent;color:var(--accent);box-shadow:none}

.landing-nav{position:sticky;top:0;z-index:100;height:68px;display:grid;grid-template-columns:160px 1fr 52px;gap:18px;background:color-mix(in srgb,var(--surface) 96%,transparent);backdrop-filter:blur(20px);box-shadow:0 1px 3px #00000012}
.landing-nav-tabs{position:relative;height:56px;align-self:center;padding:4px;display:grid;grid-template-columns:repeat(var(--nav-count,4),minmax(80px,150px));justify-content:center;background:var(--nav-cover);backdrop-filter:blur(26px) saturate(1.4);border:1px solid var(--nav-cover-border);border-radius:28px;box-shadow:0 10px 28px #00000012}
.landing-nav-link{position:relative;display:grid;place-items:center;border:0;border-radius:23px;background:transparent;color:var(--muted);font-weight:650;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:color .16s ease,background-color .16s ease,transform .12s ease}.landing-nav-link:not(.active):hover{background:transparent;color:var(--text)}.landing-nav-link:active{transform:scale(.94)}.landing-nav-link.active{color:var(--accent);background:transparent}.landing-nav-link.active::after{display:none}.landing-nav-link .ui-icon{width:25px;height:25px}.landing-nav-link span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.landing-language{align-self:center;justify-self:end;width:42px;height:42px;border:0;border-radius:50%;background:var(--surface-3);color:var(--text);font-weight:750}.landing-about,.landing-contact{margin-top:40px;padding:48px;border:1px solid var(--line);border-radius:24px;background:var(--surface)}.landing-about h2,.landing-contact h2{margin:10px 0;font-size:clamp(28px,4vw,46px)}.landing-about p,.landing-contact p{max-width:760px;color:var(--muted);line-height:1.8}.landing-contact{display:flex;align-items:center;justify-content:space-between;gap:24px}.auth-card-tools{display:flex;justify-content:flex-end;margin-bottom:12px}

@media(max-width:1199px){.quiet-toolbar{grid-template-columns:minmax(150px,1fr) minmax(320px,520px) minmax(140px,1fr)}.quiet-toolbar-title>div{display:none}.quiet-course-button span{display:none}}
@media(max-width:767px){
  .quiet-toolbar{position:fixed;top:8px;inset-inline:10px;height:56px;margin:0!important;display:grid;grid-template-columns:minmax(0,1fr) auto;padding:0 10px;border:1px solid color-mix(in srgb,var(--line) 80%,transparent);border-radius:18px;box-shadow:0 10px 28px #00000014}.quiet-toolbar-title>div{display:block}.quiet-toolbar-title small{display:none}.quiet-toolbar-title strong{display:block;font-size:16px}.quiet-toolbar-actions{gap:7px}.quiet-course-button,.quiet-avatar{width:40px;min-width:40px;height:40px;padding:0}.quiet-desktop-tabs{display:none}.quiet-sidebar{top:0}.quiet-return-button{position:fixed;inset-inline-start:18px;bottom:calc(max(10px,env(safe-area-inset-bottom)) + 76px);z-index:121;width:54px;height:54px;padding:0;display:grid;place-items:center;border:1px solid var(--nav-cover-border);border-radius:50%;background:var(--nav-cover);color:var(--text);box-shadow:0 10px 28px #00000018;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:color .18s ease,transform .16s cubic-bezier(.2,.8,.2,1),box-shadow .18s ease}.quiet-return-button .ui-icon{width:25px;height:25px;stroke-width:1.9;transition:transform .18s cubic-bezier(.2,.8,.2,1)}.quiet-return-button:active{transform:scale(.9)}.bottom-nav{position:fixed;left:50%;bottom:max(10px,env(safe-area-inset-bottom));z-index:120;width:min(calc(100% - 24px),440px);height:64px;padding:6px;display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);align-items:center;gap:2px;transform:translateX(-50%);border:1px solid var(--nav-cover-border);border-radius:30px;background:var(--nav-cover);backdrop-filter:blur(26px) saturate(1.4);box-shadow:0 16px 38px #0000001c}.bottom-nav-item{position:relative;height:52px;min-width:0;display:grid;place-items:center;border-radius:23px;color:var(--muted);text-decoration:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.bottom-nav-icon{width:46px;height:46px;display:grid;place-items:center;border-radius:21px;transition:transform .2s cubic-bezier(.2,.8,.2,1),color .2s ease,background-color .2s ease,box-shadow .2s ease}.bottom-nav-icon .ui-icon{width:25px;height:25px;stroke-width:1.75;transition:transform .2s cubic-bezier(.2,.8,.2,1),stroke-width .2s ease}.bottom-nav-label{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.bottom-nav-item.is-active{color:var(--accent)}.bottom-nav-item.is-active .bottom-nav-icon{background:transparent;box-shadow:none;animation:bottom-nav-arrive .28s cubic-bezier(.2,.9,.25,1)}.bottom-nav-item.is-active .ui-icon{stroke-width:2}.bottom-nav-item:active .bottom-nav-icon{transform:scale(.88)}.bottom-nav-item:focus-visible{outline:0}.bottom-nav-item:focus-visible .bottom-nav-icon{outline:3px solid color-mix(in srgb,var(--accent) 36%,transparent);outline-offset:2px}@media(hover:hover){.bottom-nav-item:not(.is-active):hover{color:var(--text)}.bottom-nav-item:not(.is-active):hover .bottom-nav-icon{background:transparent;transform:translateY(-2px)}}@keyframes bottom-nav-arrive{0%{transform:translateY(6px) scale(.78)}70%{transform:translateY(-2px) scale(1.06)}100%{transform:translateY(0) scale(1)}}
  @media(hover:hover){.quiet-return-button:hover{color:var(--accent);box-shadow:0 12px 30px #00000020}[dir=ltr] .quiet-return-button:hover .ui-icon{transform:translateX(-3px)}[dir=rtl] .quiet-return-button:hover .ui-icon{transform:translateX(3px)}}
  .quiet-popover{position:fixed;top:74px;inset-inline:12px;width:auto;max-height:calc(100dvh - 158px);border-radius:20px}.quiet-course-popover{inset-inline-end:12px}
  .landing-page{padding-bottom:calc(92px + env(safe-area-inset-bottom))}.landing-nav{height:62px;grid-template-columns:1fr 48px;padding-inline:4px}.landing-nav .brand{padding-inline:8px}.landing-nav-tabs{position:fixed;left:50%;right:auto;bottom:max(10px,env(safe-area-inset-bottom));z-index:120;width:min(calc(100% - 24px),440px);height:64px;padding:6px;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:1fr;gap:2px;transform:translateX(-50%);background:var(--nav-cover);backdrop-filter:blur(26px) saturate(1.4);border:1px solid var(--nav-cover-border);border-radius:30px;box-shadow:0 16px 38px #0000001c}.landing-nav-link{flex-direction:column;gap:2px;border-radius:16px;font-size:10px}.landing-nav-link.active{color:var(--accent);background:transparent}.landing-nav-link.active::after{display:none}.landing-about,.landing-contact{padding:26px}.landing-contact{align-items:flex-start;flex-direction:column}
}

/* Device-class overrides keep browser containers from misreporting phone layouts. */
html[data-device=mobile] .landing-page{padding-inline-start:0;padding-bottom:calc(92px + env(safe-area-inset-bottom))}
html[data-device=mobile] .landing-nav{position:sticky;inset:auto;top:0;width:auto;height:62px;padding:0 4px;display:grid;grid-template-columns:1fr 48px;grid-template-rows:1fr;gap:8px;border:0;border-bottom:1px solid var(--line);border-radius:0;backdrop-filter:none;-webkit-backdrop-filter:none;transform:none;filter:none;contain:none}
html[data-device=mobile] .landing-nav .brand{display:flex;justify-content:flex-start;padding-inline:8px}
html[data-device=mobile] .landing-nav .brand-name{display:initial}
html[data-device=mobile] .landing-nav .brand-mark{width:auto;height:auto;border-radius:0}
html[data-device=mobile] .landing-nav-tabs{position:fixed;left:50%;right:auto;bottom:max(10px,env(safe-area-inset-bottom));z-index:120;width:min(calc(100% - 24px),440px);height:64px;padding:6px;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:1fr;gap:2px;transform:translateX(-50%);background:var(--nav-cover);backdrop-filter:blur(26px) saturate(1.4);border:1px solid var(--nav-cover-border);border-radius:30px;box-shadow:0 16px 38px #0000001c}
html[data-device=mobile] .landing-nav-link{min-width:0;flex-direction:column;gap:2px;padding:6px 2px;border-radius:16px;font-size:10px;line-height:1.15}

html[data-device=mobile] .landing-nav-link.active{color:var(--accent);background:transparent}
html[data-device=mobile] .landing-nav-link.active::after{display:none}
html[data-device=mobile] .landing-language{align-self:center;justify-self:end}

html[data-device=tablet] .landing-page{padding-inline-start:108px;padding-bottom:0}
html[data-device=tablet] .landing-nav{position:fixed;inset-block:0;inset-inline-start:0;top:auto;width:96px;height:100dvh;padding:18px 8px;display:grid;grid-template-columns:1fr;grid-template-rows:64px minmax(0,1fr) 56px;gap:14px;border:0;border-inline-end:1px solid var(--line);border-radius:0;background:color-mix(in srgb,var(--surface) 97%,transparent);box-shadow:1px 0 5px #00000012}
html[data-device=tablet] .landing-nav .brand{justify-content:center;padding:0}
html[data-device=tablet] .landing-nav .brand-name{display:none}
html[data-device=tablet] .landing-nav .brand-mark{width:44px;height:44px;border-radius:50%}
html[data-device=tablet] .landing-nav-tabs{position:relative;inset:auto;width:100%;height:auto;display:grid;grid-template-columns:1fr;grid-template-rows:repeat(4,minmax(68px,1fr));align-self:center;justify-content:stretch;gap:7px;padding:5px;border:1px solid var(--nav-cover-border);border-radius:28px;background:var(--nav-cover);backdrop-filter:blur(26px) saturate(1.4);box-shadow:0 10px 28px #00000012}
html[data-device=tablet] .landing-nav-link{min-width:0;flex-direction:column;gap:6px;padding:8px 3px;border-radius:13px;font-size:11px;line-height:1.15;text-align:center}

html[data-device=tablet] .landing-nav-link.active{background:transparent}
html[data-device=tablet] .landing-nav-link.active::after{inset:8px auto 8px 0;inset-inline-start:0;width:3px;height:auto;border-radius:0 3px 3px 0}
html[data-device=tablet] .landing-language{align-self:end;justify-self:center}

/* CSS-only tablet fallback. Kept after the base navigation rules so it wins. */
@media(min-width:768px) and (max-width:1199px){
  html:not([data-device]) .landing-page{padding-inline-start:108px}
  html:not([data-device]) .landing-nav{position:fixed;inset-block:0;inset-inline-start:0;top:auto;width:96px;height:100dvh;padding:18px 8px;display:grid;grid-template-columns:1fr;grid-template-rows:64px minmax(0,1fr) 56px;gap:14px;border:0;border-inline-end:1px solid var(--line);border-radius:0}
  html:not([data-device]) .landing-nav-tabs{width:100%;height:auto;display:grid;grid-template-columns:1fr;grid-template-rows:repeat(4,minmax(68px,1fr));align-self:center;gap:7px}
}

/* Privacy-restricted in-app browsers can hide UA and touch data. A narrow,
   very tall viewport is phone-shaped even when its scaled width exceeds 767px. */
@media(max-width:1100px) and (max-aspect-ratio:5/8){
  .landing-page{padding-inline-start:0;padding-bottom:calc(92px + env(safe-area-inset-bottom))}
  .landing-nav{position:sticky;inset:auto;top:0;width:auto;height:62px;padding:0 4px;display:grid;grid-template-columns:1fr 48px;grid-template-rows:1fr;gap:8px;border:0;border-bottom:1px solid var(--line);border-radius:0;backdrop-filter:none;-webkit-backdrop-filter:none;transform:none;filter:none;contain:none}
  .landing-nav .brand{display:flex;justify-content:flex-start;padding-inline:8px}
  .landing-nav .brand-name{display:initial}
  .landing-nav-tabs{position:fixed;left:50%;right:auto;bottom:max(10px,env(safe-area-inset-bottom));z-index:120;width:min(calc(100% - 24px),440px);height:64px;padding:6px;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:1fr;gap:2px;transform:translateX(-50%);background:var(--nav-cover);backdrop-filter:blur(26px) saturate(1.4);border:1px solid var(--nav-cover-border);border-radius:30px;box-shadow:0 16px 38px #0000001c}
  .landing-nav-link{min-width:0;flex-direction:column;gap:2px;padding:6px 2px;border-radius:16px;font-size:10px;line-height:1.15}
  
  
  .landing-nav-link.active{color:var(--accent);background:transparent}
  .landing-nav-link.active::after{display:none}
  .landing-language{align-self:center;justify-self:end}
}


/* School students get an explicit course switcher beside the profile avatar. */
.quiet-course-button.school-course-switcher{
  max-width:240px;
  padding:0 12px;
  min-height:40px;
  border:1px solid color-mix(in srgb,var(--line) 82%,transparent);
  border-radius:20px;
  background:var(--surface-2);
  color:var(--text);
}
.quiet-course-button.school-course-switcher span{
  display:block;
  max-width:180px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  font-weight:650;
}
@media(max-width:1199px){
  .quiet-course-button.school-course-switcher span{display:block;max-width:130px}
}
@media(max-width:767px){
  .quiet-course-button.school-course-switcher{
    width:auto;
    min-width:40px;
    max-width:142px;
    height:40px;
    padding:0 10px;
    gap:7px;
  }
  .quiet-course-button.school-course-switcher span{
    display:block;
    max-width:84px;
    font-size:11px;
    line-height:1;
  }
}


/* Dedicated Chat application host */
.quiet-workspace.chat-app-host>.main-nav,
.quiet-workspace.chat-app-host>.settings-nav,
.quiet-workspace.chat-app-host>.sidebar,
.quiet-workspace.chat-app-host>.sub-nav,
.quiet-workspace.chat-app-host>.quiet-menu-backdrop,
.quiet-workspace.chat-app-host>.quiet-sidebar,
.quiet-workspace.chat-app-host>.quiet-toolbar,
.quiet-workspace.chat-app-host>.bottom-nav,
.quiet-workspace.chat-app-host>.quiet-return-button{display:none!important}
.quiet-workspace.chat-app-host>.workspace-main{
  margin:0!important;
  padding:0!important;
  width:100%!important;
  max-width:none!important;
  min-height:100dvh!important;
}


/* Desktop sidebar-only workspace + universal landing bottom navigation v27 */
@media(min-width:1200px){
  .quiet-workspace{--desktop-sidebar-w:260px}
  .quiet-workspace>.quiet-toolbar,
  .quiet-workspace>.sub-nav,
  .quiet-workspace>.bottom-nav,
  .quiet-workspace>.quiet-return-button,
  .quiet-workspace>.main-nav,
  .quiet-workspace>.settings-nav,
  .quiet-workspace>.sidebar{display:none!important}

  .quiet-workspace>.quiet-sidebar{
    display:flex!important;
    inset:0 auto 0 auto!important;
    inset-inline-start:0!important;
    width:var(--desktop-sidebar-w)!important;
    transform:none!important;
    box-shadow:none!important;
    border-inline-end:1px solid var(--line)!important;
    z-index:90!important;
  }
  .quiet-workspace.quiet-sidebar-collapsed>.quiet-sidebar{transform:none!important}
  .quiet-workspace .quiet-sidebar-close,
  .quiet-workspace .quiet-menu-button{display:none!important}

  body .quiet-workspace>.workspace-main,
  body .quiet-workspace.quiet-sidebar-collapsed>.workspace-main{
    margin:0!important;
    margin-inline-start:var(--desktop-sidebar-w)!important;
    width:calc(100% - var(--desktop-sidebar-w))!important;
    max-width:none!important;
    min-height:100dvh!important;
    padding:36px 42px 64px!important;
  }
  body .quiet-workspace>.workspace-main.workspace-main-subjects{padding:32px 40px 64px!important}

  .quiet-sidebar-context{
    display:grid;
    gap:3px;
    margin-top:12px;
    padding:14px 10px 2px;
    border-top:1px solid var(--line);
  }
  .quiet-sidebar-context>small{
    padding:0 2px 6px;
    color:var(--muted);
    font-size:9px;
    font-weight:800;
    letter-spacing:.12em;
  }
  .quiet-context-link{
    min-height:34px;
    display:flex;
    align-items:center;
    padding:7px 10px;
    border-radius:10px;
    color:var(--muted);
    font-size:12px;
    font-weight:650;
    text-decoration:none;
  }
  .quiet-context-link:hover{background:var(--surface-3);color:var(--text)}
  .quiet-context-link.selected{
    background:color-mix(in srgb,var(--accent) 10%,transparent);
    color:var(--accent);
  }
}
@media(max-width:1199px){.quiet-sidebar-context{display:none}}

/* The public landing navigation lives at the bottom on every device. */
.landing-page{padding-inline-start:0!important;padding-bottom:96px!important}
html body .landing-page .landing-nav{
  position:fixed!important;
  inset:auto auto auto 50%!important;
  bottom:max(12px,env(safe-area-inset-bottom))!important;
  transform:translateX(-50%)!important;
  z-index:190!important;
  width:min(1120px,calc(100vw - 24px))!important;
  max-width:none!important;
  height:68px!important;
  margin:0!important;
  padding:7px 10px!important;
  display:grid!important;
  grid-template-columns:minmax(132px,1fr) minmax(300px,560px) minmax(48px,1fr)!important;
  grid-template-rows:1fr!important;
  align-items:center!important;
  gap:12px!important;
  border:1px solid var(--nav-cover-border)!important;
  border-radius:24px!important;
  background:var(--nav-cover)!important;
  backdrop-filter:blur(26px) saturate(1.4)!important;
  box-shadow:0 16px 42px #00000020!important;
}
html body .landing-page .landing-nav .brand{justify-self:start!important;padding:0!important}
html body .landing-page .landing-language{justify-self:end!important;align-self:center!important}
html body .landing-page .landing-nav-tabs{
  position:relative!important;
  inset:auto!important;
  left:auto!important;
  right:auto!important;
  bottom:auto!important;
  top:auto!important;
  transform:none!important;
  width:100%!important;
  height:54px!important;
  margin:0!important;
  display:grid!important;
  grid-template-columns:repeat(4,minmax(0,1fr))!important;
  grid-template-rows:1fr!important;
  align-items:stretch!important;
  gap:4px!important;
}
html body .landing-page .landing-nav-link{
  min-width:0!important;
  min-height:48px!important;
  padding:7px 10px!important;
  justify-content:center!important;
}

@media(max-width:767px){
  .landing-page{padding-bottom:88px!important}
  html body .landing-page .landing-nav{
    bottom:max(8px,env(safe-area-inset-bottom))!important;
    width:calc(100vw - 16px)!important;
    height:64px!important;
    padding:5px 7px!important;
    grid-template-columns:42px minmax(0,1fr) 42px!important;
    gap:5px!important;
    border-radius:22px!important;
  }
  html body .landing-page .landing-nav .brand-name{display:none!important}
  html body .landing-page .landing-nav .brand-mark{width:38px!important;height:38px!important;border-radius:12px!important}
  html body .landing-page .landing-language{width:38px!important;height:38px!important;padding:0!important}
  html body .landing-page .landing-nav-tabs{height:52px!important}
  html body .landing-page .landing-nav-link{padding:5px!important}
}