/* Hero */
    .hero {
      position: relative; overflow: hidden; padding: 92px 0 105px;
      background: linear-gradient(145deg, #f8fcff 0%, #fff 49%, #effaf8 100%);
    }
    .hero::before { content: ""; position: absolute; width: 600px; height: 600px; right: -300px; top: -260px; border: 1px solid rgba(21,149,220,.16); border-radius: 50%; box-shadow: 0 0 0 80px rgba(21,149,220,.025), 0 0 0 160px rgba(21,149,220,.02); }
    .hero-grid { position: relative; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 65px; }
    .hero h1 span { color: var(--blue-600); }
    .hero-copy > p { max-width: 620px; font-size: 1.17rem; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 28px; }
    .trust-row { display: flex; flex-wrap: wrap; gap: 10px 18px; }
    .trust-label { display: inline-flex; align-items: center; gap: .45rem; color: var(--gray-700); font-size: .83rem; font-weight: 700; }
    .trust-label svg { width: 16px; color: var(--mint-500); }

    .app-window { position: relative; padding: 14px; background: var(--navy-900); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); transform: perspective(1300px) rotateY(-2deg); }
    .window-top { display: flex; align-items: center; justify-content: space-between; padding: 2px 4px 13px; }
    .window-dots { display: flex; gap: 6px; }
    .window-dots i { width: 7px; height: 7px; background: #7390a4; border-radius: 50%; }
    .window-secure { color: #bfd1dd; font-size: .69rem; }
    .app-shell { display: grid; grid-template-columns: 118px 1fr; min-height: 500px; overflow: hidden; background: var(--gray-50); border-radius: 17px; }
    .app-side { padding: 18px 12px; color: #cae0ec; background: #102f48; }
    .app-logo { display: flex; align-items: center; gap: 7px; margin-bottom: 25px; color: var(--white); font-size: .72rem; font-weight: 800; }
    .mini-cross { display: grid; place-items: center; width: 23px; height: 23px; background: var(--blue-500); border-radius: 7px; }
    .side-link { display: flex; align-items: center; gap: 7px; padding: 9px 7px; margin-bottom: 5px; border-radius: 7px; font-size: .64rem; }
    .side-link.active { color: var(--white); background: rgba(53,198,212,.16); }
    .side-icon { width: 10px; height: 10px; border: 1px solid currentColor; border-radius: 3px; }
    .app-main { padding: 24px; }
    .app-greeting { margin-bottom: 3px; font-size: .7rem; color: var(--gray-500); }
    .app-main h3 { margin-bottom: 17px; font-size: 1rem; }
    .query-bubble { padding: 14px 15px; margin-bottom: 16px; color: var(--white); background: var(--blue-700); border-radius: 12px 12px 3px 12px; font-size: .72rem; line-height: 1.55; }
    .answer-card { padding: 16px; background: var(--white); border: 1px solid var(--gray-200); border-radius: 13px; box-shadow: 0 7px 20px rgba(5,35,55,.06); }
    .answer-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 11px; }
    .answer-head strong { font-size: .72rem; }
    .source-pill { padding: 3px 7px; color: #147555; background: var(--mint-100); border-radius: 20px; font-size: .53rem; font-weight: 800; }
    .check-item { display: grid; grid-template-columns: 17px 1fr; gap: 8px; padding: 9px 0; border-top: 1px solid var(--gray-100); font-size: .62rem; line-height: 1.45; }
    .check { display: grid; place-items: center; width: 15px; height: 15px; margin-top: 1px; color: var(--white); background: var(--mint-500); border-radius: 50%; font-size: .5rem; font-weight: 900; }
    .citation { display: inline-block; margin-top: 2px; color: var(--blue-600); font-size: .53rem; font-weight: 700; }
    .answer-footer { display: flex; gap: 6px; margin-top: 12px; }
    .tiny-tag { padding: 4px 7px; color: var(--gray-700); background: var(--gray-50); border-radius: 5px; font-size: .5rem; }
    .float-badge { position: absolute; right: -17px; bottom: 42px; display: flex; align-items: center; gap: 8px; padding: 10px 13px; background: var(--white); border-radius: 12px; box-shadow: var(--shadow-sm); font-size: .69rem; font-weight: 800; }
    .pulse { width: 8px; height: 8px; background: var(--mint-500); border-radius: 50%; box-shadow: 0 0 0 4px rgba(54,185,140,.14); }