:root{
  --orange:#FF8811;--orange-d:#d96f00;--navy:#18206F;--navy-2:#27308f;
  --cyan:#43E5FF;--pink:#F44174;--pos:#34D399;--warn:#FBBF24;--neg:#F87171;
  --space-0:#05060f;--space-1:#080b1c;--space-2:#0d1230;
  --ink:#eaf0ff;--ink-2:#aeb8e0;--ink-3:#6f78a8;
  --line:rgba(120,140,220,.16);--line-2:rgba(120,140,220,.28);
  --glass:rgba(18,24,56,.55);--glass-2:rgba(24,32,72,.72);
  --fd:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --fm:ui-monospace,'SFMono-Regular','JetBrains Mono',Menlo,monospace;
  --radius:16px;--shadow:0 24px 80px rgba(0,0,0,.55);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;height:100%;}
body{
  background:radial-gradient(1200px 800px at 70% -10%, #131a44 0%, var(--space-1) 45%, var(--space-0) 100%);
  color:var(--ink);font-family:var(--fd);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.14;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input{font-family:inherit;}
[hidden]{display:none !important;}

.stars{position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
   radial-gradient(1.4px 1.4px at 12% 22%, #fff8, transparent),
   radial-gradient(1.2px 1.2px at 28% 64%, #cfe6ff7a, transparent),
   radial-gradient(1.6px 1.6px at 47% 13%, #fff7, transparent),
   radial-gradient(1px 1px at 63% 48%, #bcd4ff6e, transparent),
   radial-gradient(1.5px 1.5px at 78% 28%, #fff8, transparent),
   radial-gradient(1px 1px at 35% 88%, #fff6, transparent);}

/* brand */
.mark{display:flex;align-items:center;gap:9px;}
.mark .glyph{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--navy-2),var(--navy));
  border:1px solid var(--line-2);display:grid;place-items:center;position:relative;flex-shrink:0;}
.mark .glyph::after{content:"";width:11px;height:11px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,var(--cyan),var(--orange));box-shadow:0 0 10px rgba(67,229,255,.7);}
.mark .wm{font-weight:800;font-size:16px;}
.mark .wm span{color:var(--orange);}
.mark.sm .glyph{width:26px;height:26px;}

/* ===== login ===== */
.login-stage{position:fixed;inset:0;z-index:10;display:grid;place-items:center;}
.login-card{width:360px;background:linear-gradient(180deg,var(--glass-2),var(--glass));
  border:1px solid var(--line-2);border-radius:var(--radius);padding:28px;backdrop-filter:blur(18px);box-shadow:var(--shadow);}
.login-tag{font-family:var(--fm);font-size:11px;color:var(--ink-3);letter-spacing:.06em;margin:14px 0 22px;}
.login-card label{display:block;font-family:var(--fm);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin:0 0 6px;}
.login-card input{width:100%;background:rgba(5,7,18,.6);border:1px solid var(--line-2);border-radius:10px;
  padding:11px 12px;color:var(--ink);font-size:14px;outline:none;margin-bottom:13px;transition:.2s;}
.login-card input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(67,229,255,.14);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;border-radius:11px;
  padding:12px 16px;font-weight:600;font-size:14.5px;transition:.18s;}
.btn-primary{background:linear-gradient(180deg,var(--orange),var(--orange-d));color:#1a1300;box-shadow:0 8px 24px rgba(255,136,17,.32);}
.btn-primary:hover{transform:translateY(-1px);}
.btn-sso{margin-top:10px;background:rgba(5,7,18,.5);border:1px solid var(--line-2);color:var(--ink);font-weight:500;}
.btn-sso:hover{border-color:var(--cyan);}
.login-hint{margin-top:16px;font-size:11.5px;color:var(--ink-3);text-align:center;line-height:1.5;}
.login-error{margin-top:12px;font-size:12.5px;color:var(--neg);text-align:center;}

/* ===== app shell ===== */
.app{position:fixed;inset:0;z-index:20;display:grid;
  grid-template-columns:232px 1fr 340px;grid-template-rows:60px 1fr;
  background:radial-gradient(900px 600px at 80% -10%,#101736,#080b1c 60%);transition:grid-template-columns .3s ease;}
.app.ai-hidden{grid-template-columns:232px 1fr 0;}
.app.ai-hidden .aipanel{opacity:0;pointer-events:none;}
@media(max-width:1120px){.app{grid-template-columns:200px 1fr 300px;}}

.topbar{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;border-bottom:1px solid var(--line);background:rgba(8,11,28,.7);backdrop-filter:blur(12px);}
.topbar .left{display:flex;align-items:center;gap:18px;}
.topbar .right{display:flex;align-items:center;gap:14px;}
.search{display:flex;align-items:center;gap:9px;background:rgba(5,7,18,.6);border:1px solid var(--line-2);
  border-radius:11px;padding:8px 13px;width:340px;color:var(--ink-3);}
.search input{background:none;border:none;outline:none;color:var(--ink);width:100%;font-size:13.5px;}
.search-ic{font-size:15px;}
.ai-toggle{display:flex;align-items:center;gap:7px;background:rgba(5,7,18,.5);border:1px solid var(--line-2);
  border-radius:10px;padding:7px 12px;color:var(--ink-2);font-size:12.5px;font-family:var(--fm);transition:.16s;}
.ai-toggle:hover{border-color:var(--cyan);color:var(--ink);}
.spark{width:20px;height:20px;border-radius:6px;display:grid;place-items:center;font-size:11px;
  background:radial-gradient(circle at 35% 30%,var(--cyan),var(--orange));color:#06122a;}
.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--orange),var(--pink));
  display:grid;place-items:center;font-weight:700;font-size:13px;color:#fff;cursor:pointer;}

.side{border-right:1px solid var(--line);background:rgba(7,10,24,.55);padding:14px 12px;overflow-y:auto;}
.side .grp{font-family:var(--fm);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);padding:14px 12px 8px;}
.nav{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:11px;color:var(--ink-2);
  font-size:14px;font-weight:500;transition:.16s;position:relative;cursor:pointer;}
.nav .nav-ic{width:18px;text-align:center;opacity:.8;}
.nav:hover{background:rgba(67,229,255,.06);color:var(--ink);}
.nav.active{background:linear-gradient(90deg,rgba(255,136,17,.16),rgba(255,136,17,.02));color:#fff;}
.nav.active::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;
  background:var(--orange);box-shadow:0 0 10px var(--orange);}

.main{overflow-y:auto;padding:26px 30px 60px;}
.view{display:none;animation:fade .35s ease;}
.view.active{display:block;}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.vhead{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:22px;gap:16px;flex-wrap:wrap;}
.vhead h2{font-size:25px;}
.vhead .sub{color:var(--ink-3);font-size:13.5px;margin-top:4px;}
.placeholder{background:linear-gradient(180deg,var(--glass-2),var(--glass));border:1px dashed var(--line-2);
  border-radius:16px;padding:40px;color:var(--ink-3);font-family:var(--fm);font-size:13px;text-align:center;}

.arch-layers{display:grid;gap:16px;}
.alayer{border:1px dashed var(--line-2);border-radius:16px;padding:20px 18px 16px;position:relative;
  background:linear-gradient(180deg,var(--glass-2),var(--glass));}
.alayer .lh{position:absolute;top:-10px;left:16px;background:var(--space-1);padding:0 9px;
  font-family:var(--fm);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);}
.alayer p{margin:4px 0 0;color:var(--ink-2);font-size:13.5px;}

/* ===== ai panel ===== */
.aipanel{border-left:1px solid var(--line);background:rgba(7,10,24,.62);display:flex;flex-direction:column;
  min-width:0;overflow:hidden;transition:opacity .3s ease;}
.aihead{display:flex;align-items:center;justify-content:space-between;padding:13px 15px;border-bottom:1px solid var(--line);}
.aihead .at{display:flex;align-items:center;gap:9px;font-weight:700;font-size:13.5px;}
.ai-status{font-family:var(--fm);font-size:9px;color:var(--cyan);border:1px solid rgba(67,229,255,.3);border-radius:12px;padding:2px 7px;}
.aibody{flex:1;overflow-y:auto;padding:15px;display:flex;flex-direction:column;gap:11px;}
.msg{max-width:94%;font-size:12.5px;line-height:1.5;border-radius:13px;padding:10px 12px;}
.msg.ai{align-self:flex-start;background:rgba(67,229,255,.08);border:1px solid rgba(67,229,255,.18);}
.msg.user{align-self:flex-end;background:rgba(255,136,17,.12);border:1px solid rgba(255,136,17,.28);}
.aiinput{padding:11px 13px;border-top:1px solid var(--line);display:flex;gap:8px;align-items:center;}
.aiinput input{flex:1;background:rgba(5,7,18,.6);border:1px solid var(--line-2);border-radius:11px;padding:10px 12px;color:var(--ink);font-size:12.5px;outline:none;}
.aisend{width:38px;height:38px;border-radius:11px;background:linear-gradient(180deg,var(--orange),var(--orange-d));color:#1a1300;display:grid;place-items:center;flex-shrink:0;}
.aiinput input:disabled,.aisend:disabled{opacity:.5;cursor:not-allowed;}