.shell{background:var(--bg-soft);flex-direction:column;min-height:100vh;display:flex}.topbar{background:var(--white);color:var(--header);border-bottom:3px solid var(--red);box-shadow:0 2px 12px #1e2a3214}.topbar__inner{grid-template-columns:auto 1fr auto;align-items:center;gap:18px;max-width:1100px;margin:0 auto;padding:14px 24px 12px;display:grid}.logo-img{width:auto;height:52px;display:block}.brand h1{color:var(--header);margin:0;font-size:1.4rem;font-weight:800;line-height:1.25}.brand__kicker{color:var(--muted);margin:0 0 2px;font-size:.8rem}.brand__meta{color:var(--body);flex-wrap:wrap;align-items:center;gap:6px 14px;margin:6px 0 0;font-size:.84rem;display:flex}.pill{border-radius:var(--pill);color:var(--blue);background:#0072f014;border:1px solid #0072f040;padding:2px 10px;font-size:.78rem;font-weight:700;display:inline-block}.badge-sim{border-radius:var(--pill);color:var(--red-deep);white-space:nowrap;background:#d4060514;border:1px solid #d4060559;padding:4px 10px;font-size:.75rem;font-weight:700;display:inline-block}.nav{background:var(--header);flex-wrap:wrap;gap:0;max-width:1100px;margin:0 auto;padding:0 24px;font-size:.9rem;font-weight:600;display:flex}.nav span{color:#ffffffe0;border-left:1px solid #ffffff1f;padding:10px 14px 12px}.nav span:last-child{border-left:none}.nav span.is-active{color:#fff;text-underline-offset:4px;text-decoration:underline;-webkit-text-decoration-color:var(--red);text-decoration-color:var(--red);font-weight:800}.hero{flex:1;grid-template-columns:1fr 1.05fr;align-items:start;gap:28px;width:100%;max-width:1100px;margin:0 auto;padding:28px 24px 40px;display:grid}.hero__copy h2{color:var(--header);margin:0 0 10px;font-size:1.55rem;line-height:1.3}.hero__copy>p{color:var(--body);max-width:36rem;margin:0 0 18px}.homework{grid-template-columns:1fr auto 1fr;align-items:stretch;gap:10px;margin-top:8px;display:grid}.homework__card{background:var(--white);border:1px solid var(--hair);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px 14px}.homework__card--before{border-top:3px solid var(--muted)}.homework__card--after{border-top:3px solid var(--red)}.homework__label{letter-spacing:.02em;color:var(--muted);text-transform:uppercase;margin-bottom:6px;font-size:.72rem;font-weight:800;display:inline-block}.homework__card p{color:var(--charcoal);margin:0;font-size:.92rem}.homework__arrow{color:var(--red);align-self:center;font-size:1.4rem;font-weight:800}.chat{background:var(--white);border:1px solid var(--hair);box-shadow:var(--shadow);border-radius:14px;flex-direction:column;min-height:520px;display:flex;overflow:hidden}.chat__head{border-bottom:1px solid var(--hair);background:linear-gradient(180deg, #fff, var(--blue-light));padding:14px 16px}.chat__head h3{color:var(--header);margin:0 0 2px;font-size:1.1rem}.chat__head span{color:var(--muted);font-size:.82rem}.chat__msgs{background:#fafbfc;flex-direction:column;flex:1;gap:10px;max-height:380px;padding:14px 16px;display:flex;overflow-y:auto}.bubble{white-space:pre-wrap;border-radius:12px;max-width:92%;padding:10px 12px;font-size:.95rem;line-height:1.45}.bubble--user{background:var(--header);color:#fff;border-bottom-right-radius:4px;align-self:flex-start}.bubble--bot{border:1px solid var(--hair);color:var(--charcoal);background:#fff;border-bottom-left-radius:4px;align-self:flex-end}.bubble--typing{color:var(--muted);font-style:italic}.bubble__sources{color:var(--muted);margin-top:8px;font-size:.8rem}.bubble__sources a{font-weight:600}.bubble__cta-row{flex-wrap:wrap;gap:6px;margin-top:10px;display:flex}.chat__suggestions{flex-wrap:wrap;gap:6px;padding:8px 12px 0;display:flex}.chip{border:1px solid var(--hair);border-radius:var(--pill);cursor:pointer;color:var(--header);background:#fff;padding:6px 12px;font-size:.82rem}.chip:hover:not(:disabled){border-color:var(--blue);color:var(--blue)}.chip:disabled{opacity:.5;cursor:not-allowed}.chat__composer{border-top:1px solid var(--hair);background:#fff;gap:8px;padding:12px;display:flex}.chat__composer input{border:1px solid var(--hair);border-radius:10px;flex:1;padding:10px 12px}.btn{border-radius:var(--pill);cursor:pointer;border:1px solid #0000;padding:8px 14px;font-size:.88rem;font-weight:700}.btn--primary{background:var(--red);color:#fff}.btn--primary:hover:not(:disabled){background:var(--red-deep)}.btn--ghost{border-color:var(--hair);color:var(--header);background:#fff}.btn:disabled{opacity:.55;cursor:not-allowed}.site-foot{background:var(--header);color:#ffffffe6;margin-top:auto}.site-foot__inner{flex-wrap:wrap;justify-content:space-between;gap:8px 18px;max-width:1100px;margin:0 auto;padding:14px 24px;font-size:.86rem;display:flex}.site-foot .muted{color:#ffffffa6}.toast{background:var(--header);color:#fff;border-radius:var(--pill);box-shadow:var(--shadow);z-index:50;padding:12px 18px;font-size:.9rem;position:fixed;bottom:24px;left:50%;transform:translate(-50%)}.overlay{z-index:40;background:#1e2a3273;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.modal{width:min(420px,100%);box-shadow:var(--shadow);background:#fff;border-radius:14px;padding:18px}.modal h4{color:var(--header);margin:0 0 6px}.hint{color:var(--muted);margin:0 0 12px;font-size:.82rem}.field{margin-bottom:12px}.field label{margin-bottom:4px;font-size:.82rem;font-weight:700;display:block}.field input,.field textarea{border:1px solid var(--hair);background:#fff;border-radius:8px;width:100%;padding:9px 11px}.modal__actions{justify-content:flex-end;gap:8px;margin-top:8px;display:flex}@media (width<=900px){.hero,.homework{grid-template-columns:1fr}.homework__arrow{justify-self:center;transform:rotate(-90deg)}.topbar__inner{grid-template-columns:auto 1fr}.badge-sim{grid-column:1/-1;justify-self:start}}:root{--red:#d40605;--red-deep:#c60024;--blue:#0072f0;--blue-light:#f5f9ff;--charcoal:#282830;--header:#1e2a32;--body:#404345;--muted:#6c7073;--hair:#e8e9ea;--bg-soft:#f5f5f5;--white:#fff;--pill:999px;--sans:"Assistant", "Noto Sans Hebrew", Arial, sans-serif;--radius:10px;--shadow:0 8px 28px #1e2a321f}*,:before,:after{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{font-family:var(--sans);color:var(--charcoal);background:var(--bg-soft);-webkit-font-smoothing:antialiased;line-height:1.45}a{color:var(--blue)}button,input,textarea{font:inherit}