:root{--bg:#f4f6f8;--card:#fff;--ink:#111827;--muted:#6b7280;--line:#e5e7eb;--green:#0f9d58;--green2:#087d46;--red:#b91c1c;--nav:#111827;--shadow:0 14px 36px rgba(15,23,42,.07)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif}button,input,textarea,select{font:inherit}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:22px;padding:13px 22px;background:var(--nav);color:#fff}.topbar>div:first-child{min-width:230px}.topbar small{display:block;color:#cbd5e1}.tabs{display:flex;gap:6px;flex:1}.tab{border:0;background:transparent;color:#cbd5e1;padding:9px 12px;border-radius:10px;cursor:pointer}.tab.active,.tab:hover{background:#263244;color:#fff}
.shell{max-width:1460px;margin:auto;padding:18px}.view{display:none}.view.active{display:block}
.hero{display:flex;justify-content:space-between;align-items:center;background:linear-gradient(135deg,#111827,#1f2937);color:#fff;padding:28px;border-radius:24px;box-shadow:var(--shadow)}.hero h1{font-size:clamp(30px,4vw,50px);margin:7px 0}.hero p{color:#cbd5e1}.eyebrow{font-size:12px;letter-spacing:.16em;color:#86efac}.dark-text{color:#087d46}
.mic{width:92px;height:92px;border:0;border-radius:50%;font-size:39px;background:var(--green);cursor:pointer;box-shadow:0 0 0 12px rgba(15,157,88,.15)}.mic.listening{background:#dc2626;animation:pulse 1s infinite}@keyframes pulse{50%{transform:scale(1.08)}}
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:16px 0}.metrics article,.panel,.chat{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.metrics article{padding:18px;min-height:105px}.metrics b{display:block;font-size:31px}.metrics span{color:var(--muted)}
.home-grid{display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:16px;align-items:start}.chat{height:680px;display:flex;flex-direction:column;overflow:hidden}.chat-head{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;border-bottom:1px solid var(--line)}.chat-head h2{margin:0}.chat-head small,.muted{color:var(--muted)}.head-actions{display:flex;gap:8px}.conversation{padding:18px;overflow:auto;flex:1}.message{white-space:pre-wrap;line-height:1.5;max-width:82%;padding:12px 14px;border-radius:16px;margin:9px 0}.message.user{margin-left:auto;background:#111827;color:#fff;border-bottom-right-radius:5px}.message.assistant{background:#ecfdf5;border:1px solid #bbf7d0;border-bottom-left-radius:5px}.composer{padding:14px;border-top:1px solid var(--line)}.composer textarea{width:100%;padding:13px;border:1px solid var(--line);border-radius:14px;resize:none}.composer-actions{display:flex;justify-content:space-between;margin-top:9px}
.right-stack{display:flex;flex-direction:column;gap:16px}.panel{padding:18px}.panel h2{margin:0 0 13px;font-size:19px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.list-item{padding:11px 0;border-bottom:1px solid var(--line)}.list-item:last-child{border:0}.list-item small{display:block;color:var(--muted);margin-top:4px}
.primary,.ghost,.danger,.link{border:0;border-radius:11px;padding:10px 14px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.primary{background:var(--green);color:#fff;font-weight:700}.primary:hover{background:var(--green2)}.ghost{background:#edf1f5;color:var(--ink)}.ghost.dark{background:#263244;color:#fff}.danger{background:#fee2e2;color:#991b1b}.small{padding:7px 10px;font-size:13px}.file-label input{display:none}
.page-title,.search-hero{background:#fff;border:1px solid var(--line);border-radius:20px;padding:25px;margin-bottom:16px}.page-title h1,.search-hero h1{margin:7px 0;font-size:34px}.files-grid{display:grid;grid-template-columns:350px minmax(0,1fr);gap:16px;align-items:start}.upload-panel form{display:grid;gap:13px}.upload-panel label:not(.drop-zone){display:grid;gap:6px;color:var(--muted)}.upload-panel input,.upload-panel select,.compact-input,.global-search input{border:1px solid var(--line);border-radius:11px;padding:11px;background:#fff}.drop-zone{display:grid;place-items:center;min-height:140px;border:2px dashed #b8c2cc;border-radius:15px;background:#f8fafc;cursor:pointer;text-align:center;padding:15px}.drop-zone input{max-width:100%;margin-top:10px}.files-panel{min-height:500px}.file-list{display:grid;gap:10px;margin-top:13px}.file-card{border:1px solid var(--line);border-radius:14px;padding:14px}.file-card-head{display:flex;justify-content:space-between;gap:15px}.file-card h3{font-size:16px;margin:0 0 5px}.file-card p{margin:8px 0;color:var(--muted);line-height:1.4}.file-actions{display:flex;gap:7px;flex-wrap:wrap}
.global-search{display:flex;gap:9px;margin-top:17px}.global-search input{flex:1;font-size:17px}.search-results{white-space:pre-wrap;line-height:1.55}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(135deg,#111827,#0f5132)}.login-card{width:min(440px,100%);background:#fff;padding:30px;border-radius:24px;box-shadow:var(--shadow)}.brand{width:66px;height:66px;border-radius:50%;display:grid;place-items:center;background:#111827;color:#fff;font-weight:900}.login-card label{display:block;color:var(--muted);margin:14px 0}.login-card input{display:block;width:100%;margin-top:7px;padding:12px;border:1px solid var(--line);border-radius:12px}.login-card button{width:100%}.error{color:var(--red)}
@media(max-width:1000px){.topbar{flex-wrap:wrap}.tabs{order:3;width:100%;overflow:auto}.home-grid,.files-grid{grid-template-columns:1fr}.chat{height:650px}.right-stack{display:grid;grid-template-columns:1fr 1fr}.topbar>div:first-child{min-width:0}}
@media(max-width:650px){.shell{padding:10px}.topbar{padding:11px 13px}.hero{padding:18px}.hero h1{font-size:29px}.mic{width:70px;height:70px;font-size:29px}.metrics{grid-template-columns:1fr 1fr}.metrics article{min-height:90px;padding:13px}.home-grid{gap:10px}.right-stack{display:flex}.chat-head{align-items:flex-start;flex-direction:column}.message{max-width:94%}.global-search{flex-direction:column}}