@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --ink:#0E1B2A;
  --surface:#152840;
  --surface2:#1C3348;
  --line:#28425A;
  --brass:#D8A24A;
  --brass-dim:#8A6B33;
  --coral:#E8674F;
  --sage:#7FB88F;
  --text:#EAF1F5;
  --muted:#93A6B4;
  --faint:#5C7180;
  --radius:10px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--ink);
  color:var(--text);
  font-family:'Inter',sans-serif;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.display{font-family:'Space Grotesk',sans-serif;}
.mono{font-family:'IBM Plex Mono',monospace;}
button{font-family:inherit;cursor:pointer;}
::selection{background:var(--brass);color:var(--ink);}
a{color:var(--brass);}

/* ---------- scrollbar ---------- */
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:var(--line);border-radius:8px;}

/* ---------- LOGIN ---------- */
#login-screen{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background:
    radial-gradient(circle at 15% 20%, rgba(216,162,74,0.10), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(127,184,143,0.08), transparent 40%),
    var(--ink);
  padding:24px;
}
.login-card{
  width:100%;
  max-width:920px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  display:grid;
  grid-template-columns:1.1fr 1fr;
  overflow:hidden;
}
@media (max-width:760px){ .login-card{grid-template-columns:1fr;} }
.login-left{
  padding:44px 40px;
  border-right:1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(216,162,74,0.06), transparent 60%);
}
@media (max-width:760px){ .login-left{border-right:none;border-bottom:1px solid var(--line);} }
.brand-mark{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--brass);font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  margin-bottom:26px;font-weight:600;
}
.brand-mark .dot{width:8px;height:8px;border-radius:50%;background:var(--brass);box-shadow:0 0 0 4px rgba(216,162,74,0.18);}
.login-left h1{font-size:34px;line-height:1.15;margin:0 0 14px;font-weight:700;}
.login-left p{color:var(--muted);font-size:15px;line-height:1.6;margin:0 0 22px;max-width:40ch;}
.pipeline-preview{display:flex;gap:6px;margin-top:28px;flex-wrap:wrap;}
.pipeline-chip{
  font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--faint);
  border:1px solid var(--line);padding:5px 9px;border-radius:20px;
}
.login-right{padding:44px 40px;display:flex;flex-direction:column;justify-content:center;}
.role-group label{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);display:block;margin-bottom:10px;}
.role-btns{display:grid;gap:10px;margin-bottom:22px;}
.role-btn{
  display:flex;align-items:center;gap:12px;
  background:var(--surface2);border:1px solid var(--line);color:var(--text);
  padding:13px 14px;border-radius:10px;text-align:left;font-size:14px;font-weight:600;
  transition:border-color .15s, transform .1s;
}
.role-btn:hover{border-color:var(--brass);}
.role-btn.active{border-color:var(--brass);background:rgba(216,162,74,0.10);}
.role-btn .emoji{font-size:19px;}
.role-btn small{display:block;font-weight:400;color:var(--muted);font-size:12px;margin-top:2px;}
input[type=text]{
  width:100%;background:var(--surface2);border:1px solid var(--line);color:var(--text);
  padding:12px 13px;border-radius:10px;font-size:14px;margin-bottom:16px;font-family:inherit;
}
input[type=text]:focus{outline:none;border-color:var(--brass);}
.enter-btn{
  width:100%;background:var(--brass);color:#22160a;border:none;padding:13px;border-radius:10px;
  font-weight:700;font-size:14px;letter-spacing:.02em;
}
.enter-btn:disabled{opacity:.4;cursor:not-allowed;}
.enter-btn:not(:disabled):hover{background:#e6b563;}
.auth-tabs{display:flex;gap:4px;background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:4px;margin-bottom:22px;}
.auth-tab{flex:1;background:none;border:none;color:var(--muted);font-size:13px;font-weight:600;padding:9px;border-radius:7px;}
.auth-tab.active{background:var(--brass);color:#22160a;}
.auth-error{background:rgba(232,103,79,0.10);border:1px solid rgba(232,103,79,0.4);color:var(--coral);font-size:12.5px;padding:9px 12px;border-radius:8px;margin-bottom:14px;}
.auth-hint{color:var(--faint);font-size:11.5px;margin-top:2px;margin-bottom:16px;line-height:1.5;}
.field-lbl{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);display:block;margin-bottom:8px;}
.switch-line{text-align:center;font-size:12.5px;color:var(--faint);margin-top:16px;}
.switch-line button{background:none;border:none;color:var(--brass);font-weight:600;font-size:12.5px;padding:0;}

/* ---------- APP SHELL ---------- */
#app-screen{display:none;min-height:100vh;grid-template-columns:230px 1fr;}
#app-screen.show{display:grid;}
.sidebar{
  background:var(--surface);border-right:1px solid var(--line);
  padding:22px 16px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.sidebar .brand-mark{margin-bottom:26px;padding-left:4px;}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;
  color:var(--muted);font-size:13.5px;font-weight:600;margin-bottom:2px;background:none;border:none;width:100%;text-align:left;
}
.nav-item:hover{color:var(--text);background:var(--surface2);}
.nav-item.active{color:var(--brass);background:rgba(216,162,74,0.10);}
.sidebar-footer{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);}
.user-chip{display:flex;align-items:center;gap:9px;padding:8px 4px;font-size:12.5px;color:var(--muted);}
.user-chip .avatar{
  width:28px;height:28px;border-radius:50%;background:var(--surface2);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--brass);font-weight:700;
}
.logout-link{background:none;border:none;color:var(--faint);font-size:12px;margin-top:6px;padding:4px;}
.logout-link:hover{color:var(--coral);}

.main{padding:28px 32px 60px;overflow-y:auto;height:100vh;}
.page-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px;flex-wrap:wrap;gap:10px;}
.page-head h2{font-size:22px;margin:0;}
.page-head .sub{color:var(--muted);font-size:13px;margin-top:3px;}

.grid{display:grid;gap:16px;}
.cols-4{grid-template-columns:repeat(4,1fr);}
.cols-3{grid-template-columns:repeat(3,1fr);}
.cols-2{grid-template-columns:1fr 1fr;}
@media(max-width:900px){.cols-4,.cols-3,.cols-2{grid-template-columns:1fr;}}

.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px 20px;}
.stat-card .num{font-family:'Space Grotesk';font-size:30px;font-weight:700;}
.stat-card .lbl{color:var(--muted);font-size:12.5px;margin-top:4px;}
.stat-card .tag{font-size:11px;color:var(--brass);text-transform:uppercase;letter-spacing:.08em;font-weight:700;margin-bottom:6px;}

/* ---------- PIPELINE ---------- */
.pipeline{
  display:flex;align-items:flex-start;gap:0;overflow-x:auto;padding:22px 6px 10px;
}
.pnode{
  display:flex;flex-direction:column;align-items:center;min-width:108px;position:relative;
}
.pnode .circle{
  width:44px;height:44px;border-radius:50%;background:var(--surface2);border:2px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:18px;transition:all .3s ease;z-index:2;
}
.pnode.active .circle{border-color:var(--brass);box-shadow:0 0 0 6px rgba(216,162,74,0.15);background:rgba(216,162,74,0.12);}
.pnode.done .circle{border-color:var(--sage);background:rgba(127,184,143,0.12);}
.pnode.skip .circle{opacity:.3;}
.pnode .lbl{font-size:11px;color:var(--muted);text-align:center;margin-top:8px;max-width:100px;font-weight:600;}
.pnode .status{font-family:'IBM Plex Mono';font-size:10px;color:var(--brass);margin-top:3px;text-align:center;min-height:14px;}
.pline{
  flex:1;height:2px;background:var(--line);margin-top:22px;min-width:20px;position:relative;top:0;
}
.pline.done{background:var(--sage);}

/* ---------- CHAT ---------- */
.chat-wrap{display:flex;flex-direction:column;height:calc(100vh - 260px);min-height:340px;}
.chat-log{flex:1;overflow-y:auto;padding:6px 2px;display:flex;flex-direction:column;gap:14px;}
.bubble{max-width:72%;padding:12px 15px;border-radius:14px;font-size:14px;line-height:1.55;}
.bubble.student{align-self:flex-end;background:var(--brass);color:#22160a;border-bottom-right-radius:3px;font-weight:500;}
.bubble.ai{align-self:flex-start;background:var(--surface2);border:1px solid var(--line);border-bottom-left-radius:3px;}
.bubble.ai .conf{font-family:'IBM Plex Mono';font-size:10.5px;color:var(--brass);margin-top:8px;display:block;}
.bubble.ticket{align-self:flex-start;background:rgba(232,103,79,0.10);border:1px solid rgba(232,103,79,0.4);border-bottom-left-radius:3px;}
.bubble.ticket .tid{font-family:'IBM Plex Mono';color:var(--coral);font-weight:700;}
.chat-input-row{display:flex;gap:10px;margin-top:14px;}
.chat-input-row input{flex:1;margin-bottom:0;}
.send-btn{background:var(--brass);border:none;color:#22160a;padding:0 20px;border-radius:10px;font-weight:700;font-size:13px;}
.send-btn:disabled{opacity:.4;}
.suggestions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;}
.sugg{font-size:12px;background:var(--surface2);border:1px solid var(--line);color:var(--muted);padding:6px 11px;border-radius:20px;}
.sugg:hover{color:var(--text);border-color:var(--brass);}

/* ---------- TICKET / LIST ---------- */
.ticket-row{
  border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px;background:var(--surface2);
}
.ticket-row .top{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;}
.ticket-row .tid{font-family:'IBM Plex Mono';font-size:12px;color:var(--brass);}
.ticket-row .q{font-size:14px;margin:8px 0 6px;line-height:1.5;}
.ticket-row .meta{font-size:11.5px;color:var(--faint);display:flex;gap:12px;flex-wrap:wrap;}
.status-pill{font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:4px 10px;border-radius:20px;}
.status-pill.open{background:rgba(232,103,79,0.15);color:var(--coral);}
.status-pill.answered{background:rgba(216,162,74,0.15);color:var(--brass);}
.status-pill.resolved{background:rgba(127,184,143,0.15);color:var(--sage);}
.reply-box{margin-top:10px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px;}
.reply-box textarea{width:100%;background:var(--ink);border:1px solid var(--line);border-radius:8px;color:var(--text);padding:9px;font-family:inherit;font-size:13px;min-height:60px;margin-bottom:8px;}
.small-btn{background:var(--brass);border:none;color:#22160a;padding:8px 14px;border-radius:8px;font-size:12.5px;font-weight:700;}
.small-btn.ghost{background:transparent;border:1px solid var(--line);color:var(--muted);}
.small-btn.sage{background:var(--sage);}
.resp-shown{font-size:13px;background:var(--surface);border-left:2px solid var(--sage);padding:9px 12px;border-radius:6px;margin-top:10px;color:var(--muted);}
.empty{color:var(--faint);font-size:13.5px;text-align:center;padding:40px 0;}

/* ---------- BAR CHART ---------- */
.bar-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.bar-row .name{width:120px;font-size:12px;color:var(--muted);flex-shrink:0;}
.bar-track{flex:1;background:var(--surface2);border-radius:6px;height:16px;overflow:hidden;}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--brass-dim),var(--brass));border-radius:6px;}
.bar-row .val{width:26px;text-align:right;font-family:'IBM Plex Mono';font-size:12px;color:var(--muted);}

/* ---------- ARCH / KB TABLES ---------- */
table{width:100%;border-collapse:collapse;font-size:13px;}
th{text-align:left;color:var(--muted);font-weight:600;font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;padding:8px 10px;border-bottom:1px solid var(--line);}
td{padding:10px 10px;border-bottom:1px solid var(--line);vertical-align:top;}
tr:last-child td{border-bottom:none;}
.agent-list{display:grid;gap:10px;}
.agent-item{display:flex;gap:12px;padding:12px;background:var(--surface2);border:1px solid var(--line);border-radius:10px;}
.agent-item .ic{font-size:20px;}
.agent-item b{font-size:13.5px;}
.agent-item p{margin:3px 0 0;color:var(--muted);font-size:12.5px;line-height:1.5;}

.toast-wrap{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:8px;z-index:99;}
.toast{background:var(--surface2);border:1px solid var(--brass);color:var(--text);padding:11px 16px;border-radius:10px;font-size:12.5px;box-shadow:0 8px 24px rgba(0,0,0,0.35);animation:slidein .25s ease;max-width:300px;}
@keyframes slidein{from{transform:translateY(10px);opacity:0;}to{transform:translateY(0);opacity:1;}}

.tab-strip{display:flex;gap:6px;margin-bottom:20px;flex-wrap:wrap;}
.tab-strip button{background:var(--surface2);border:1px solid var(--line);color:var(--muted);padding:8px 14px;border-radius:8px;font-size:12.5px;font-weight:600;}
.tab-strip button.active{background:var(--brass);color:#22160a;border-color:var(--brass);}

.kb-item{padding:12px 14px;background:var(--surface2);border:1px solid var(--line);border-radius:10px;margin-bottom:8px;}
.kb-item .dept{font-size:10.5px;color:var(--brass);text-transform:uppercase;letter-spacing:.06em;font-weight:700;}
.kb-item h4{margin:5px 0 4px;font-size:13.5px;}
.kb-item p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.5;}

.footlinks{display:flex;gap:14px;margin-top:10px;padding-top:10px;border-top:1px solid var(--line);flex-wrap:wrap;}
.footlinks button{background:none;border:none;color:var(--faint);font-size:11px;}
.footlinks button:hover{color:var(--brass);}

/* ---------- ARCHITECTURE DIAGRAM ---------- */
.arch-tier-label{text-align:center;font-size:10.5px;text-transform:uppercase;letter-spacing:.12em;color:var(--faint);margin-bottom:12px;font-weight:700;}
.arch-tier{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.arch-box{
  background:var(--surface2);border:1px solid var(--line);border-radius:12px;
  padding:16px 18px;min-width:160px;max-width:220px;flex:1;text-align:center;
  transition:border-color .15s;
}
.arch-box:hover{border-color:var(--brass);}
.arch-box.wide{max-width:640px;}
.arch-box .ic{font-size:22px;margin-bottom:6px;}
.arch-box b{font-size:13px;display:block;}
.arch-box small{color:var(--muted);font-size:11px;display:block;margin-top:5px;line-height:1.45;}
.arch-connector{display:flex;justify-content:center;padding:10px 0;color:var(--brass);font-size:20px;font-weight:700;}
.mini-agents{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:12px;}
.mini-agents span{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:var(--muted);border:1px solid var(--line);padding:4px 9px;border-radius:20px;background:var(--surface);}

/* ---------- NLP DESIGN DEMO ---------- */
.nlp-step{border-left:2px solid var(--line);padding:4px 0 14px 14px;margin-bottom:2px;}
.nlp-step:last-child{padding-bottom:0;}
.nlp-step b{font-size:12.5px;color:var(--brass);display:block;margin-bottom:6px;}
.nlp-step p{margin:0;font-size:13px;color:var(--text);line-height:1.55;}
.nlp-tokens{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:8px;}
.tok{font-family:'IBM Plex Mono',monospace;font-size:11px;background:var(--surface);border:1px solid var(--line);color:var(--muted);padding:3px 8px;border-radius:6px;}
.tok.clean{color:var(--sage);border-color:rgba(127,184,143,0.35);}
.tok.muted{opacity:.4;text-decoration:line-through;}