:root{
  --dark-blue:#071b3a;
  --blue:#0b3b79;
  --soft-blue:#eef5ff;
  --line:#e7edf6;
  --text:#132238;
  --muted:#65758b;
  --white:#fff;
  --shadow:0 18px 50px rgba(7,27,58,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:#f7faff;color:var(--text)}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:310px;background:var(--dark-blue);color:#fff;padding:22px;position:fixed;left:0;top:0;bottom:0;overflow-y:auto;z-index:20}
.brand-box{display:flex;gap:13px;align-items:center;margin-bottom:22px}
.brand-icon{width:48px;height:48px;border-radius:15px;background:linear-gradient(135deg,#fff,#cfe4ff);color:var(--dark-blue);display:grid;place-items:center;font-weight:900;box-shadow:0 12px 30px rgba(255,255,255,.15)}
.brand-box h1{font-size:21px;line-height:1;margin:0;font-weight:800;letter-spacing:-.03em}.brand-box span{color:#a9bad2;font-size:12px}.new-chat-btn{width:100%;border:1px solid rgba(255,255,255,.17);background:rgba(255,255,255,.08);color:#fff;border-radius:14px;padding:12px 14px;text-align:left;font-weight:700;transition:.2s}.new-chat-btn:hover{background:#fff;color:var(--dark-blue);transform:translateY(-1px)}.side-title{margin:25px 0 12px;color:#a9bad2;text-transform:uppercase;font-size:11px;font-weight:800;letter-spacing:.12em}.popular-list{display:grid;gap:9px}.popular-item{border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.06);border-radius:14px;padding:11px 12px;cursor:pointer;transition:.2s}.popular-item:hover{background:rgba(255,255,255,.14);transform:translateX(4px)}.popular-item strong{display:block;font-size:13px}.popular-item small{display:block;color:#a9bad2;font-size:11px;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.side-note{margin-top:24px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.06);border-radius:16px;padding:14px;color:#c4d2e6;font-size:12px;line-height:1.5}.skeleton-line{height:42px;border-radius:12px;background:linear-gradient(90deg,rgba(255,255,255,.06),rgba(255,255,255,.16),rgba(255,255,255,.06));animation:shine 1.2s infinite}.skeleton-line.short{width:75%}@keyframes shine{0%{opacity:.4}50%{opacity:1}100%{opacity:.4}}
.main-panel{margin-left:310px;width:calc(100% - 310px);min-height:100vh;display:flex;flex-direction:column}.topbar{height:70px;background:rgba(255,255,255,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:10}.topbar strong{display:block;color:var(--dark-blue);font-size:16px}.topbar small{display:block;color:var(--muted);font-size:12px}.status-pill{display:inline-flex;gap:8px;align-items:center;background:#eef8f2;color:#176a39;border:1px solid #d5efdf;border-radius:999px;padding:7px 12px;font-size:12px;font-weight:800}.status-pill span{width:7px;height:7px;border-radius:50%;background:#20b15a}.menu-btn{border:0;background:var(--soft-blue);color:var(--dark-blue);border-radius:10px;width:42px;height:42px}.hero-section{text-align:center;padding:58px 24px 22px}.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;color:var(--blue);font-size:13px;font-weight:800;box-shadow:var(--shadow)}.hero-section h2{font-size:42px;line-height:1.12;color:var(--dark-blue);letter-spacing:-.04em;font-weight:850;margin:18px auto 14px;max-width:860px}.hero-section p{max-width:680px;margin:0 auto;color:var(--muted);font-size:16px}.chat-window{width:min(980px,calc(100% - 34px));margin:0 auto 110px;display:grid;gap:16px}.welcome-card,.message-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:var(--shadow);display:flex;gap:14px;animation:softIn .32s ease both}.ai-avatar,.user-avatar{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;flex:0 0 auto}.ai-avatar{background:var(--dark-blue);color:#fff}.user-avatar{background:var(--soft-blue);color:var(--blue)}.welcome-card h5{margin:0 0 5px;color:var(--dark-blue);font-weight:850}.welcome-card p{margin:0;color:var(--muted);line-height:1.55}.inline-search{border:0;background:transparent;color:var(--blue);font-weight:800;padding:0}.message-card.user{background:#f8fbff}.message-content{width:100%}.message-content h4{font-size:18px;font-weight:850;color:var(--dark-blue);margin:0 0 8px}.muted{color:var(--muted)}.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;margin-top:12px}.result-box{background:#f8fbff;border:1px solid var(--line);border-radius:16px;padding:13px}.result-box label{display:block;text-transform:uppercase;letter-spacing:.08em;color:#718198;font-size:10px;font-weight:900;margin-bottom:5px}.result-box p{margin:0;color:#26364d;font-size:13px;line-height:1.55}.full{grid-column:1/-1}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.tag-pill{background:#eef5ff;border:1px solid #d9e8fb;color:#0b3b79;border-radius:999px;padding:6px 9px;font-size:11px;font-weight:800}.composer{position:fixed;left:310px;right:0;bottom:0;background:linear-gradient(180deg,rgba(247,250,255,0),#f7faff 28%);padding:34px 22px 22px;z-index:12}.composer-inner{width:min(980px,100%);margin:0 auto;background:#fff;border:1px solid #d7e1ef;border-radius:22px;padding:10px 10px 10px 16px;display:flex;align-items:center;gap:11px;box-shadow:0 20px 65px rgba(7,27,58,.13)}.composer-inner i{color:var(--blue);font-size:20px}.composer input{border:0;outline:0;flex:1;font-size:15px;padding:13px 4px;background:transparent}.composer button{border:0;background:var(--dark-blue);color:#fff;border-radius:15px;padding:12px 20px;font-weight:850;transition:.2s}.composer button:hover{background:var(--blue);transform:translateY(-1px)}.composer button:disabled{opacity:.6;transform:none}.loader{display:flex;align-items:center;gap:10px;color:var(--muted)}.loader span{width:8px;height:8px;border-radius:50%;background:var(--blue);animation:bounce 1s infinite}.loader span:nth-child(2){animation-delay:.15s}.loader span:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,80%,100%{transform:scale(.8);opacity:.4}40%{transform:scale(1);opacity:1}}@keyframes softIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:991px){.sidebar{transform:translateX(-102%);transition:.25s}.sidebar.open{transform:translateX(0)}.main-panel{margin-left:0;width:100%}.composer{left:0}.hero-section h2{font-size:31px}.topbar{padding:0 16px}.status-pill{display:none}.result-grid{grid-template-columns:1fr}}
.result-head{display:flex;gap:18px;align-items:flex-start;margin-bottom:16px}.valve-img-wrap{width:180px;min-width:180px;border:1px solid #dbe7f7;background:#f8fbff;border-radius:18px;overflow:hidden;box-shadow:0 14px 28px rgba(10,42,91,.08)}.valve-img-wrap img{width:100%;display:block}.animated-result{animation:softPop .38s ease both}@keyframes softPop{from{opacity:0;transform:translateY(12px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}.result-card .message-content{max-width:100%}@media(max-width:768px){.result-head{display:block}.valve-img-wrap{width:100%;min-width:0;margin-bottom:14px}.valve-img-wrap img{max-height:190px;object-fit:cover}}
/* V4 richer result animations and reference buttons */
.result-card{overflow:hidden;position:relative}.result-card:before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,#071b3a,#0b3b79,#dcecff);opacity:.95}.animated-result{opacity:0;animation:floatIn .52s cubic-bezier(.2,.8,.2,1) forwards}.result-title-box{min-width:0}.mini-label{display:inline-flex;border:1px solid #d9e8fb;background:#eef5ff;color:#0b3b79;border-radius:999px;padding:5px 9px;font-size:10px;text-transform:uppercase;letter-spacing:.08em;font-weight:900;margin-bottom:8px}.link-row{display:flex;flex-wrap:wrap;gap:9px;margin:12px 0 2px}.soft-link{display:inline-flex;align-items:center;gap:7px;text-decoration:none;background:#fff;border:1px solid #d7e4f4;color:#0b3b79;border-radius:999px;padding:8px 11px;font-size:12px;font-weight:850;box-shadow:0 8px 18px rgba(7,27,58,.05);transition:.2s}.soft-link:hover{background:#071b3a;color:#fff;transform:translateY(-1px)}.valve-img-wrap{background:linear-gradient(135deg,#f8fbff,#eef5ff);position:relative}.valve-img-wrap img{height:150px;object-fit:contain;padding:10px;background:white}.source-note{background:#fffaf2;border-color:#f2dfbd}.source-note label{color:#9a6a0a}@keyframes floatIn{0%{opacity:0;transform:translateY(18px) scale(.982);filter:blur(4px)}100%{opacity:1;transform:translateY(0) scale(1);filter:blur(0)}}@media(max-width:768px){.valve-img-wrap img{height:190px;object-fit:contain}.link-row{margin-bottom:10px}}

/* Mobile menu fixes */
.sidebar-close{
  position:absolute;
  top:14px;
  right:14px;
  width:38px;
  height:38px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.10);
  color:#fff;
  border-radius:12px;
  display:none;
  align-items:center;
  justify-content:center;
  transition:.2s ease;
}
.sidebar-close:hover{background:#fff;color:var(--dark-blue)}
.sidebar-overlay{
  position:fixed;
  inset:0;
  background:rgba(7,27,58,.42);
  backdrop-filter:blur(3px);
  z-index:18;
  opacity:0;
  pointer-events:none;
  transition:opacity .25s ease;
}
body.menu-open{overflow:hidden}
body.menu-open .sidebar-overlay{opacity:1;pointer-events:auto}
@media(max-width:991px){
  .sidebar{z-index:30;box-shadow:22px 0 60px rgba(7,27,58,.22)}
  .sidebar-close{display:flex}
  .brand-box{padding-right:44px}
}