:root{
  --bg:#070a12; --bg2:#0b1020; --panel:#0e1526; --panel2:#111a30;
  --line:#1c2742; --txt:#e8edf7; --mut:#8a97b4; --mut2:#5e6b88;
  --cy:#22d3ee; --cy2:#38bdf8; --vi:#8b5cf6; --grn:#34d399; --yel:#fbbf24; --red:#fb7185;
  --grad:linear-gradient(135deg,#22d3ee,#8b5cf6);
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--txt);font-family:Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow:hidden}
.hidden{display:none!important}
button{font-family:inherit;cursor:pointer}

/* ---- orb ---- */
.orb{width:64px;height:64px;border-radius:50%;margin:0 auto 18px;background:var(--grad);filter:blur(2px);box-shadow:0 0 40px rgba(34,211,238,.5),0 0 80px rgba(139,92,246,.35);animation:pulse 4s ease-in-out infinite}
.orb.big{width:76px;height:76px;margin-bottom:22px}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(1.08);opacity:1}}

/* ---- login ---- */
.login-screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:radial-gradient(1200px 600px at 50% -10%,#15213f 0%,var(--bg) 60%)}
.login-card{width:min(92vw,380px);background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:40px 32px;text-align:center;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.brand{font-size:34px;font-weight:800;letter-spacing:.18em;margin:0;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.tagline{color:var(--mut);font-size:13px;margin:6px 0 26px}
#login-form{display:flex;flex-direction:column;gap:12px}
input,textarea{background:var(--bg2);border:1px solid var(--line);color:var(--txt);border-radius:12px;padding:13px 15px;font-size:15px;outline:none;transition:border .2s}
input:focus,textarea:focus{border-color:var(--cy)}
#login-btn{background:var(--grad);color:#05101a;font-weight:700;border:none;border-radius:12px;padding:13px;font-size:15px;transition:transform .15s,box-shadow .15s}
#login-btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(34,211,238,.3)}
.login-err{color:var(--red);font-size:13px;min-height:18px;margin:14px 0 0}

/* ---- layout ---- */
.app{display:grid;grid-template-columns:272px 1fr;height:100vh}
.sidebar{background:linear-gradient(180deg,var(--bg2),var(--bg));border-right:1px solid var(--line);display:flex;flex-direction:column;padding:20px 16px;gap:18px}
.side-brand{display:flex;align-items:center;gap:12px}
.logo-dot{width:34px;height:34px;border-radius:10px;background:var(--grad);box-shadow:0 0 20px rgba(34,211,238,.5)}
.side-title{font-weight:800;letter-spacing:.14em;font-size:17px}
.side-sub{font-size:11px;color:var(--mut2);letter-spacing:.1em}
.new-chat{background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:12px;padding:11px;font-weight:600;font-size:14px;transition:.15s}
.new-chat:hover{border-color:var(--cy);color:var(--cy)}
.side-section{display:flex;flex-direction:column;gap:9px}
.side-label{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--mut2);font-weight:600}
.brain-seg{display:flex;background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:4px;gap:4px}
.brain-seg button{flex:1;background:transparent;border:none;color:var(--mut);padding:8px;border-radius:9px;font-size:13px;font-weight:600;transition:.15s}
.brain-seg button.active{background:var(--grad);color:#05101a}
.brain-hint{font-size:11px;color:var(--mut2);min-height:14px;line-height:1.4}
.budget{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:13px;display:flex;flex-direction:column;gap:8px}
.budget-row{display:flex;justify-content:space-between;font-size:13px;color:var(--mut)}
.budget-row b{color:var(--txt)}
.budget-bar{height:6px;background:var(--bg2);border-radius:4px;overflow:hidden}
.budget-bar-fill{height:100%;width:2%;background:var(--grn);border-radius:4px;transition:width .4s}
.budget-cap{font-size:10.5px;color:var(--mut2);line-height:1.4}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:7px}
.legend{font-size:11.5px;color:var(--mut);display:flex;align-items:center;gap:8px}
.dot{width:9px;height:9px;border-radius:50%}
.dot.g{background:var(--grn)}.dot.y{background:var(--yel)}.dot.r{background:var(--red)}
.logout{margin-top:8px;background:transparent;border:1px solid var(--line);color:var(--mut);border-radius:10px;padding:9px;font-size:13px;transition:.15s}
.logout:hover{border-color:var(--red);color:var(--red)}

/* ---- chat ---- */
.main{display:flex;flex-direction:column;min-width:0;background:radial-gradient(900px 500px at 70% -10%,#101a33 0%,var(--bg) 55%)}
.chat{flex:1;overflow-y:auto;padding:30px 0 20px;scroll-behavior:smooth}
.welcome{max-width:680px;margin:6vh auto 0;text-align:center;padding:0 20px}
.welcome h2{font-size:30px;margin:0 0 10px;font-weight:700}
.welcome p{color:var(--mut);font-size:15px;line-height:1.6;margin:0 auto 26px;max-width:540px}
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chip{background:var(--panel);border:1px solid var(--line);color:var(--mut);border-radius:999px;padding:9px 16px;font-size:13px;transition:.15s}
.chip:hover{border-color:var(--cy);color:var(--txt);transform:translateY(-1px)}

.msg{max-width:780px;margin:0 auto 22px;padding:0 24px;display:flex;gap:14px;animation:rise .3s ease}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.avatar{width:32px;height:32px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.avatar.u{background:var(--panel2);color:var(--cy2);border:1px solid var(--line)}
.avatar.a{background:var(--grad);color:#05101a}
.bubble{flex:1;min-width:0;padding-top:4px}
.role{font-size:12px;color:var(--mut2);font-weight:600;margin-bottom:4px;display:flex;align-items:center;gap:8px}
.badge{font-size:10px;padding:2px 7px;border-radius:6px;background:var(--panel2);border:1px solid var(--line);color:var(--mut)}
.badge.heavy{color:var(--vi);border-color:#3a2e63}
.badge.light{color:var(--cy);border-color:#16424d}
.content{font-size:15px;line-height:1.7;color:var(--txt);white-space:pre-wrap;word-wrap:break-word}
.content code{background:var(--bg2);padding:2px 6px;border-radius:5px;font-family:'JetBrains Mono',monospace;font-size:13px}
.content pre{background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:14px;overflow-x:auto;margin:10px 0}
.content pre code{background:none;padding:0}
.cursor{display:inline-block;width:8px;height:16px;background:var(--cy);vertical-align:text-bottom;animation:blink 1s step-start infinite;margin-left:2px}
@keyframes blink{50%{opacity:0}}

/* ---- tool / approval cards ---- */
.card{max-width:780px;margin:0 auto 22px;padding:0 24px}
.card-inner{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--panel)}
.card-head{display:flex;align-items:center;gap:10px;padding:12px 15px;font-size:13px;font-weight:600;border-bottom:1px solid var(--line)}
.card-head .tool{font-family:'JetBrains Mono',monospace;color:var(--cy2)}
.risk-pill{margin-left:auto;font-size:11px;padding:3px 10px;border-radius:999px;font-weight:700}
.risk-green{background:rgba(52,211,153,.14);color:var(--grn)}
.risk-yellow{background:rgba(251,191,36,.14);color:var(--yel)}
.risk-red{background:rgba(251,113,133,.16);color:var(--red)}
.card-body{padding:13px 15px;font-size:13px;color:var(--mut);line-height:1.6}
.card-reason{color:var(--mut);margin-bottom:10px}
.card-pre{background:var(--bg2);border:1px solid var(--line);border-radius:9px;padding:12px;font-family:'JetBrains Mono',monospace;font-size:12.5px;color:#cdd7ee;white-space:pre-wrap;word-wrap:break-word;max-height:280px;overflow:auto}
.card-actions{display:flex;gap:10px;padding:0 15px 15px}
.btn-ok{background:var(--grad);color:#05101a;border:none;border-radius:10px;padding:10px 20px;font-weight:700;font-size:14px;transition:.15s}
.btn-ok:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(34,211,238,.3)}
.btn-no{background:transparent;border:1px solid var(--line);color:var(--mut);border-radius:10px;padding:10px 20px;font-weight:600;font-size:14px;transition:.15s}
.btn-no:hover{border-color:var(--red);color:var(--red)}
.card.done .card-actions{display:none}
.card-status{font-size:12px;font-weight:600;padding:0 15px 14px}
.card-status.ok{color:var(--grn)}.card-status.bad{color:var(--red)}
.result-pre{background:var(--bg2);border:1px solid var(--line);border-radius:9px;padding:12px;font-family:'JetBrains Mono',monospace;font-size:12.5px;color:#9fb0d0;white-space:pre-wrap;word-wrap:break-word;max-height:240px;overflow:auto;margin:0 15px 14px}

/* ---- composer ---- */
.composer{padding:14px 24px 22px;background:linear-gradient(0deg,var(--bg) 60%,transparent)}
.composer-inner{max-width:780px;margin:0 auto;display:flex;align-items:flex-end;gap:10px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:10px 10px 10px 16px;transition:border .2s}
.composer-inner:focus-within{border-color:var(--cy)}
#input{flex:1;background:transparent;border:none;resize:none;max-height:200px;padding:6px 0;font-size:15px;line-height:1.5}
#input:focus{border:none}
.send,.stop{width:40px;height:40px;border-radius:12px;border:none;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:.15s}
.send{background:var(--grad);color:#05101a}
.send:hover{transform:translateY(-1px)}
.send:disabled{opacity:.4;cursor:default;transform:none}
.stop{background:var(--red);color:#fff}
.stop span{width:13px;height:13px;background:#fff;border-radius:3px;display:block}

@media(max-width:860px){
  .app{grid-template-columns:1fr}
  .sidebar{position:fixed;left:-300px;top:0;bottom:0;z-index:40;transition:left .25s;width:272px}
  .sidebar.open{left:0}
}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-thumb{background:#1b2542;border-radius:6px;border:2px solid var(--bg)}