/* Cassus Media AI Brain — v1.1.0 */
:root{
  --brand:#b50600; --brand-dk:#8a0400; --ink:#161616; --muted:#6b6b70;
  --line:#e6e6e9; --bg:#f6f6f8; --panel:#ffffff; --panel2:#fafafb;
  --ok:#1a7f4b; --warn:#9a6a00; --radius:12px; --shadow:0 1px 3px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.05);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
sup{font-size:.6em}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;
  border-radius:10px;padding:9px 16px;font-weight:600;font-size:14px;cursor:pointer;background:#eee;color:var(--ink);transition:.15s}
.btn:hover{text-decoration:none;filter:brightness(.98)}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dk)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn.ghost:hover{background:#fff}
.btn.lg{padding:13px 22px;font-size:15px;border-radius:12px}
.btn.sm{padding:5px 10px;font-size:12.5px;border-radius:8px}
.btn.full{width:100%}
.btn.danger{background:#fff;border-color:var(--line);color:var(--brand)}
.btn:disabled{opacity:.55;cursor:not-allowed}

/* Brand mark */
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;color:var(--ink);font-weight:500}
.brand:hover{text-decoration:none}
.brand.center{justify-content:center;margin-bottom:18px}
.brand-mark{width:26px;height:26px;border-radius:7px;background:
  radial-gradient(circle at 30% 30%, var(--brand), var(--brand-dk));display:inline-block;position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;inset:6px;border-radius:50%;border:2px solid rgba(255,255,255,.85);border-right-color:transparent;border-bottom-color:transparent;transform:rotate(20deg)}

/* ---------- Marketing ---------- */
.site-head{background:#fff;border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.site-head nav{display:flex;gap:10px}
.hero{background:linear-gradient(180deg,#fff, #f6f6f8);padding:72px 0 40px;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(34px,6vw,58px);line-height:1.05;margin:0 0 18px;letter-spacing:-.02em}
.lede{font-size:19px;max-width:620px;color:#333}
.cta-row{display:flex;gap:12px;margin:26px 0 12px;flex-wrap:wrap}
.micro{font-size:13.5px;color:var(--muted)}
.center{text-align:center}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:48px 24px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.feature h3{margin:14px 0 6px;font-size:17px}
.feature p{margin:0;color:#444;font-size:14.5px}
.ic{display:inline-flex;width:40px;height:40px;border-radius:10px;background:#fdeceb;color:var(--brand);align-items:center;justify-content:center}
.ic svg{width:22px;height:22px}
.site-foot{padding:30px 0;color:var(--muted);font-size:13.5px}
@media(max-width:760px){.features{grid-template-columns:1fr}}

/* ---------- Auth ---------- */
body.auth{display:flex;align-items:flex-start;justify-content:center;min-height:100vh;padding:48px 16px;background:linear-gradient(180deg,#fff,#f1f1f4)}
.auth-card{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:34px;width:100%;max-width:420px}
.auth-card.lg{max-width:640px}
.auth-card h1{margin:.2em 0 .1em;font-size:26px;text-align:center}
.auth-card .sub{text-align:center;color:var(--muted);margin:0 0 18px}
.auth-card form{display:flex;flex-direction:column;gap:14px;margin-top:8px}
label{display:flex;flex-direction:column;gap:6px;font-size:13.5px;font-weight:600;color:#333}
input[type=text],input[type=email],input[type=password],textarea,select{
  font:inherit;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;font-weight:400}
input:focus,textarea:focus,select:focus{outline:2px solid #fbd4d1;border-color:var(--brand)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.alt{text-align:center;font-size:14px;margin-top:16px}
.alert{padding:11px 14px;border-radius:10px;font-size:14px;margin-bottom:6px}
.alert.err{background:#fdeceb;color:var(--brand-dk);border:1px solid #f6c9c6}
.check{flex-direction:row;align-items:flex-start;gap:9px;font-weight:400;font-size:13.5px;color:#333}
.check input{margin-top:3px}
/* T&C */
.tc-h{font-size:16px;margin:8px 0 0}
.tc-box{max-height:260px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:16px 18px;background:var(--panel2);font-size:13.5px}
.tc-box h3{margin:0 0 10px;font-size:15px}
.tc-box p{margin:0 0 10px}
.tc-ver{color:var(--muted);font-size:12px}
/* signature */
.sig-area{border:1px solid var(--line);border-radius:12px;padding:12px;background:#fff}
.sig-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:600;margin-bottom:8px}
#sigPad{width:100%;height:160px;border:1px dashed #c9c9cf;border-radius:8px;background:#fff;touch-action:none;cursor:crosshair}
.sig-meta{display:flex;justify-content:space-between;font-size:12.5px;color:#444;margin-top:8px;flex-wrap:wrap;gap:6px}
@media(max-width:560px){.grid2{grid-template-columns:1fr}}

/* ---------- App shell ---------- */
body.app{background:var(--bg);height:100vh;overflow:hidden}
#app.loading{display:flex;align-items:center;justify-content:center;height:100vh;color:var(--muted)}
.shell{display:grid;grid-template-columns:270px 1fr;grid-template-rows:56px 1fr;height:100vh}
.topbar{grid-column:1/3;display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--line);padding:0 16px;gap:12px}
.topbar .left{display:flex;align-items:center;gap:14px;min-width:0}
.ws-switch{display:flex;align-items:center;gap:8px}
.ws-switch select{padding:7px 10px;border-radius:9px;font-size:13.5px;font-weight:600;max-width:230px}
.badge{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:3px 8px;border-radius:20px;background:#eef;color:#334}
.badge.super{background:#fdeceb;color:var(--brand)}
.badge.admin{background:#eaf5ee;color:var(--ok)}
.badge.employee{background:#eef1f6;color:#425}
.badge.vendor{background:#f5eee9;color:#845}
.usermenu{position:relative}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:14px}
.menu-pop{position:absolute;right:0;top:42px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);min-width:220px;padding:8px;z-index:40;display:none}
.menu-pop.open{display:block}
.menu-pop .mhead{padding:8px 10px;border-bottom:1px solid var(--line);margin-bottom:6px}
.menu-pop button{display:block;width:100%;text-align:left;background:none;border:none;padding:9px 10px;border-radius:8px;font:inherit;cursor:pointer;font-size:14px}
.menu-pop button:hover{background:var(--panel2)}

/* Sidebar */
.sidebar{background:#fff;border-right:1px solid var(--line);overflow-y:auto;padding:14px 12px;display:flex;flex-direction:column;gap:6px}
.side-sec{margin-top:10px}
.side-sec h4{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:8px 6px 4px;display:flex;justify-content:space-between;align-items:center}
.side-sec h4 button{background:none;border:none;color:var(--brand);cursor:pointer;font-size:16px;line-height:1;padding:0 4px}
.side-btn{display:flex;align-items:center;gap:9px;width:100%;text-align:left;background:none;border:1px solid var(--line);border-radius:9px;padding:9px 11px;font:inherit;font-size:14px;cursor:pointer;color:var(--ink)}
.side-btn:hover{background:var(--panel2)}
.side-btn.primary{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:600;justify-content:center}
.side-btn.primary:hover{background:var(--brand-dk)}
.conv-item,.file-item,.folder-h{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:8px;cursor:pointer;font-size:13.5px}
.conv-item:hover,.file-item:hover,.folder-h:hover{background:var(--panel2)}
.conv-item.active{background:#fdeceb;color:var(--brand-dk);font-weight:600}
.conv-item .t{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}
.folder-h{font-weight:600}
.folder-c{margin-left:10px;border-left:1px solid var(--line);padding-left:6px}
.file-item{color:#444}
.pill{font-size:10.5px;background:#eef1f6;color:#556;border-radius:10px;padding:1px 7px}
.x{margin-left:auto;color:var(--muted);opacity:0;font-size:15px;line-height:1}
.conv-item:hover .x{opacity:1}
.empty{color:var(--muted);font-size:13px;padding:6px 10px}

/* Main / chat */
.main{overflow:hidden;display:flex;flex-direction:column;background:var(--bg)}
.chat-head{padding:12px 22px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;gap:10px}
.chat-head .title{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-head .scope{font-size:12px;color:var(--muted)}
.chat-actions{display:flex;gap:8px}
.messages{flex:1;overflow-y:auto;padding:24px 0}
.msg{max-width:820px;margin:0 auto 20px;padding:0 22px;display:flex;gap:14px}
.msg .who{width:30px;height:30px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff}
.msg.user .who{background:#4a4a52}
.msg.assistant .who{background:var(--brand)}
.msg .body{flex:1;min-width:0}
.msg .body h1,.msg .body h2,.msg .body h3{font-size:16px;margin:.4em 0 .2em}
.msg .body p{margin:.35em 0}
.msg .body ul{margin:.35em 0;padding-left:20px}
.msg .body code{background:#eee;padding:1px 5px;border-radius:5px;font-size:13px}
.msg .body pre{background:#1e1e22;color:#eee;padding:12px;border-radius:10px;overflow:auto;font-size:13px}
.sources{margin-top:10px;display:flex;flex-wrap:wrap;gap:6px}
.source-chip{font-size:12px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:3px 10px;color:#444;cursor:pointer}
.redact-note{font-size:11.5px;color:var(--warn);margin-top:6px}
.composer{border-top:1px solid var(--line);background:#fff;padding:14px 22px}
.composer .inner{max-width:820px;margin:0 auto;display:flex;gap:10px;align-items:flex-end}
.composer textarea{flex:1;resize:none;max-height:180px;min-height:46px;border-radius:12px;padding:12px 14px;font-size:15px}
.composer .send{height:46px;width:46px;border-radius:12px;flex:none}
.setup-banner{max-width:820px;margin:0 auto 14px;padding:10px 14px;background:#fff8e6;border:1px solid #f0e2b8;border-radius:10px;font-size:13px;color:#6a5300}

/* Modal */
.modal-bg{position:fixed;inset:0;background:rgba(20,20,25,.5);display:flex;align-items:center;justify-content:center;z-index:100;padding:18px}
.modal{background:#fff;border-radius:16px;box-shadow:var(--shadow);width:100%;max-width:560px;max-height:90vh;overflow:auto;padding:26px}
.modal.lg{max-width:760px}
.modal h2{margin:0 0 6px;font-size:20px}
.modal .mp{color:var(--muted);font-size:14px;margin:0 0 18px}
.modal .row{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.modal .actions{display:flex;justify-content:flex-end;gap:10px;margin-top:8px}
.scope-opts{display:flex;gap:10px;flex-wrap:wrap}
.scope-opt{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;padding:9px 13px;cursor:pointer;font-size:14px;font-weight:600}
.scope-opt input{margin:0}
.scope-opt.on{border-color:var(--brand);background:#fdeceb;color:var(--brand-dk)}
table.people{width:100%;border-collapse:collapse;font-size:13.5px}
table.people th,table.people td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
table.people select{padding:5px 7px;font-size:13px}
.chk-list{display:flex;flex-direction:column;gap:6px;max-height:160px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:10px}
.chk-list label{flex-direction:row;align-items:center;gap:8px;font-weight:400}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:11px 18px;border-radius:10px;font-size:14px;z-index:200;box-shadow:var(--shadow);opacity:0;transition:.25s}
.toast.show{opacity:1}
.toast.err{background:var(--brand-dk)}
.cred-box{background:var(--panel2);border:1px dashed var(--line);border-radius:10px;padding:12px 14px;font-size:13.5px;margin-top:10px}
.cred-box code{background:#fff;border:1px solid var(--line);padding:2px 7px;border-radius:6px;font-weight:700}
.spin{display:inline-block;width:16px;height:16px;border:2px solid #fff;border-top-color:transparent;border-radius:50%;animation:sp .7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.dots{display:inline-flex;gap:4px}
.dots span{width:7px;height:7px;border-radius:50%;background:var(--brand);animation:bl 1s infinite}
.dots span:nth-child(2){animation-delay:.2s}.dots span:nth-child(3){animation-delay:.4s}
@keyframes bl{0%,80%,100%{opacity:.25}40%{opacity:1}}

@media(max-width:820px){
  .shell{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:56px;bottom:0;width:280px;z-index:60;transform:translateX(-100%);transition:.2s;box-shadow:var(--shadow)}
  .sidebar.open{transform:none}
  .menu-toggle{display:inline-flex!important}
}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:6px 9px;cursor:pointer}