:root{color-scheme:dark;--bg:#07131b;--panel:#112431;--panel2:#162d3a;--card:#193340;--line:#2c4652;--teal:#41dbbc;--tealDark:#0e765f;--white:#f5fbfa;--muted:#a9c1c7;--warning:#ffcb83;--red:#ff9b9b;--radius:20px;--shadow:0 18px 50px #0003}
*{box-sizing:border-box}html{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-size:16px;-webkit-text-size-adjust:100%}body{margin:0;min-height:100vh;background:linear-gradient(145deg,#07131b 0%,#0c2530 85%);color:var(--white)}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}input,select,textarea{width:100%;background:#0c1c27;color:var(--white);border:1px solid #4d6570;border-radius:12px;padding:12px 13px;min-height:46px;outline:none}input:focus,select:focus,textarea:focus,button:focus-visible{outline:2px solid var(--teal);outline-offset:2px}textarea{min-height:88px;resize:vertical}label{font-weight:650;font-size:.82rem;color:#d1e4e5;display:block;margin-bottom:6px}fieldset{border:0;padding:0;margin:0}legend{font-weight:800;padding:0 0 12px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.45rem,3vw,2.1rem);line-height:1.2}h2{font-size:1.2rem}h3{font-size:1rem}p{line-height:1.55;color:#d0e0e1}.eyebrow{font-size:.72rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:var(--teal)}.muted{color:var(--muted)}.small{font-size:.84rem}.subtle{font-size:.72rem;color:#a9bcc5}.mono{font-variant-numeric:tabular-nums;font-feature-settings:'tnum'}
.brand{display:flex;align-items:center;gap:10px;font-weight:850;letter-spacing:.08em;font-size:1.3rem}.brand-mark{width:36px;height:36px;background:linear-gradient(145deg,#35e5c2,#07775e);color:#042b27;display:grid;place-items:center;border-radius:12px;font-size:1.6rem;box-shadow:0 4px 15px #2ed5b133}.badge{padding:5px 9px;border-radius:100px;font-weight:750;font-size:.68rem;letter-spacing:.04em;background:#1e4e50;color:#acfbe7;display:inline-block}.badge.warn{background:#61471e;color:#ffe4a2}.badge.draft{background:#354553;color:#d9e7ec}.badge.readonly{background:#253e50;color:#c7dee7}.panel{padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(150deg,#18333f,#0c202c);box-shadow:var(--shadow)}.panel.soft{box-shadow:none;background:#122834}.stack{display:grid;gap:14px}.stack-sm{display:grid;gap:8px}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.spread{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.grow{flex:1}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.field{min-width:0}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.span-2{grid-column:span 2}.btn{background:var(--teal);color:#06312b;border:1px solid transparent;border-radius:13px;font-weight:800;padding:12px 17px;min-height:45px;white-space:normal;text-align:center;display:inline-flex;align-items:center;justify-content:center;gap:7px;text-decoration:none}.btn:hover:not(:disabled){filter:brightness(1.07)}.btn.secondary{color:var(--white);background:#243f4c;border-color:#3b5a68}.btn.ghost{background:transparent;color:var(--teal);border-color:#356d66}.btn.danger{background:#6e2731;color:#ffe0df;border-color:#b55761}.btn.small{padding:8px 11px;min-height:37px;font-size:.82rem}.btn.full{width:100%}.list-card{padding:15px;border-radius:15px;border:1px solid #355564;background:#15313e;display:grid;gap:9px}.list-card.selected{border-color:var(--teal);box-shadow:0 0 0 1px #41dbbc55}.list-card h3{margin-bottom:3px}.item-actions{display:flex;gap:7px;flex-wrap:wrap}.section-heading{display:flex;align-items:center;gap:9px;margin:4px 0 12px}.section-dot{background:var(--teal);width:7px;height:7px;border-radius:100%}.message{padding:13px 16px;border-radius:12px;border:1px solid #426c60;background:#154236;color:#c0ffe9;line-height:1.4}.message.error{border-color:#a45456;background:#4b252a;color:#ffdddd}.message.info{border-color:#4c6678;background:#203744;color:#d1e7f3}.empty{padding:20px;border:1px dashed #517180;border-radius:16px;color:#b2cbd1;text-align:center;background:#132a34}.rule{height:1px;background:var(--line);margin:4px 0}.kpi{border:1px solid var(--line);border-radius:16px;padding:14px;background:#16323e}.kpi strong{font-size:1.55rem;display:block}.kpi small{color:var(--muted)}.notice{border-left:3px solid var(--warning);padding:10px 14px;background:#302b25;border-radius:0 12px 12px 0;color:#ffe3b8;font-size:.86rem}.toolbar{display:flex;gap:9px;flex-wrap:wrap;align-items:center}.pill{display:inline-block;border:1px solid #345563;border-radius:999px;padding:6px 10px;color:#c9e2e8;font-size:.75rem}.exercise-card{border-radius:16px;background:#122936;border:1px solid var(--line);padding:15px}.exercise-card .index{width:30px;height:30px;display:grid;place-items:center;border-radius:10px;background:#26565b;color:#befce9;font-weight:900}.statline{display:flex;gap:7px;flex-wrap:wrap}.statline span{border-radius:9px;background:#274450;padding:6px 9px;font-size:.79rem}.timer{font-size:2.4rem;font-weight:850;letter-spacing:.035em;font-variant-numeric:tabular-nums}.timer-box{padding:20px;background:#102e35;border:1px solid #287361;border-radius:18px;text-align:center}.bottom-note{text-align:center;font-size:.75rem;color:#93b3b8;padding:25px 0 8px}
.auth-layout{min-height:100vh;padding:22px;display:flex;justify-content:center;align-items:center}.auth-card{width:min(100%,470px)}.auth-cover{background:radial-gradient(circle at right top,#30cf9b26,transparent 55%);padding:26px 4px 22px}.auth-title{font-size:2rem;font-weight:880;letter-spacing:-.03em}.auth-list{display:flex;gap:7px;flex-wrap:wrap;margin-top:12px}.auth-card .panel{padding:27px}.shell{max-width:1400px;margin:0 auto;min-height:100vh;display:grid;grid-template-columns:245px minmax(0,1fr)}.sidebar{padding:26px 17px;border-right:1px solid #294250;background:#0b202a;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:20px}.sidebar-nav{display:grid;gap:6px}.nav-btn{width:100%;border:1px solid transparent;border-radius:12px;padding:12px;color:#c9dfe1;text-align:left;background:transparent;font-weight:750}.nav-btn.active{background:#19473f;color:#96f9db;border-color:#296d61}.nav-btn:disabled{opacity:.46}.sidebar-user{margin-top:auto;display:grid;gap:9px;overflow-wrap:anywhere}.main{min-width:0;padding:27px clamp(16px,3vw,38px) 70px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:28px}.mobile-brand{display:none}.main-content{max-width:1050px}.bottom-nav{display:none}.intro{padding:23px;background:linear-gradient(120deg,#1a3c46,#13302d);border:1px solid #2c6d60;border-radius:20px;margin-bottom:20px}.intro p{margin-bottom:0}.content-gap{margin-top:17px}.live-dot{display:inline-block;width:7px;height:7px;background:#4ae7a7;border-radius:50%;margin-right:5px}
@media(max-width:950px){.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.shell{grid-template-columns:200px minmax(0,1fr)}.sidebar{padding:20px 10px}.sidebar .brand{font-size:1rem}.main{padding:21px 15px 65px}}
@media(max-width:700px){.shell{display:block}.sidebar{display:none}.mobile-brand{display:flex}.topbar{margin-bottom:20px}.topbar .account-info{display:none}.main{padding:19px 14px 115px}.grid-2,.grid-3{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.span-2{grid-column:auto}.panel{padding:16px}.intro{padding:18px}.auth-layout{padding:12px}.auth-card .panel{padding:19px}.bottom-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;position:fixed;bottom:0;left:0;right:0;padding:10px 9px calc(10px + env(safe-area-inset-bottom));background:#0c2029f7;border-top:1px solid #34505a;backdrop-filter:blur(12px);z-index:20}.bottom-nav .nav-btn{text-align:center;padding:9px 4px;font-size:.74rem}.bottom-note{padding-bottom:0}h1{font-size:1.42rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* VYT-UI-020–024, chat e notifiche */
.chat-thread{max-height:530px;overflow-y:auto;display:grid;gap:10px;padding:5px 2px 15px;overscroll-behavior:contain}.chat-bubble{max-width:88%;padding:13px 15px;border-radius:14px;background:#183745;border:1px solid #325464}.chat-bubble.own{justify-self:end;background:#175244;border-color:#2b957f}.chat-bubble p{margin:8px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}.nav-btn[aria-current=page]{outline:1px solid #348d7a}@media(max-width:700px){.bottom-nav{display:flex;overflow-x:auto;gap:4px;scrollbar-width:thin;padding-bottom:calc(8px + env(safe-area-inset-bottom))}.bottom-nav .nav-btn{flex:0 0 76px;font-size:.72rem;line-height:1.1;min-height:48px;text-align:center}.chat-bubble{max-width:96%}.main{padding-bottom:125px}}

/* Visible authenticated logout on phones; sidebar is hidden at mobile breakpoint. */
.mobile-logout{display:none}@media(max-width:700px){.mobile-logout{display:flex}.mobile-logout .btn{min-height:35px}.topbar{justify-content:space-between}}