:root{
  --bg:#0D1014; --bg-2:#12161B; --card:#161B21;
  --line:#1E242C; --line-2:#262D36; --line-3:#3A434E;
  --text:#EDEEF0; --muted:#B4BCC6; --dim:#8B95A1;
  --accent:#C6F432; --on-accent:#0D1014; --danger:#FF8A7A;
  --nav-glass:rgba(13,16,20,.9);
  --display:'Bricolage Grotesque',system-ui,sans-serif;
  --body:'Instrument Sans',system-ui,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--text)}a:hover{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
[hidden]{display:none!important}
h1,h2,h3{font-family:var(--display);margin:0}

.topbar{border-bottom:1px solid var(--line);background:var(--nav-glass);backdrop-filter:blur(10px);position:sticky;top:0;z-index:5}
.topbar .in{max-width:860px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.brand span{font-family:var(--display);font-weight:700;font-size:20px;letter-spacing:-.01em}
.linkbtn{background:none;border:0;color:var(--dim);font:inherit;font-size:14px;cursor:pointer;min-height:44px;padding:0 4px}
.linkbtn:hover{color:var(--text)}
.nav-links .linkbtn{font-size:inherit;color:var(--text);padding:0}.nav-links .linkbtn:hover{color:var(--accent)}
@media (max-width:720px){.nav-links #signout:not([hidden]) ~ .btn{display:none}}

/* theme toggle */
.theme-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line-3);background:transparent;color:var(--dim);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background .15s,color .15s;flex:none}
.theme-btn:hover{background:var(--line-2);color:var(--text)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:16px 28px;border-radius:999px;font-family:var(--body);font-weight:600;font-size:17px;text-decoration:none;cursor:pointer;border:1px solid transparent;transition:transform .15s ease,opacity .15s}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{color:var(--on-accent);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-3)}
.btn-ghost:hover{border-color:var(--accent)}
.btn-white{background:#fff;color:#1f1f1f}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.btn-sm{padding:11px 20px;font-size:15px}
.btn-block{width:100%;padding:14px 24px;font-size:16px}

.page{max-width:860px;margin:0 auto;padding:40px 24px 64px}
.eyebrow{margin:0 0 12px;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.muted{color:var(--muted)}
.dim{color:var(--dim)}
.small{font-size:13px}
.card{background:var(--bg-2);border:1px solid var(--line);border-radius:20px;padding:28px}

/* auth */
.auth{max-width:440px;margin:24px auto 0}
.auth h1{font-weight:800;font-size:clamp(32px,7vw,44px);line-height:1.05;letter-spacing:-.03em}
.auth p.lead{margin:14px 0 28px}
.auth-card .note{margin:22px 0 0;color:var(--dim)}
@media (max-width:480px){.auth-card{padding:22px}}
.or{display:flex;align-items:center;gap:12px;margin:20px 0;color:var(--dim);font-size:13px}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line-2)}
label{display:block;font-size:14px;color:var(--muted);margin-bottom:8px}
input[type=email],input[type=text],textarea,select{width:100%;min-height:48px;background:var(--bg);color:var(--text);border:1px solid var(--line-3);border-radius:12px;padding:12px 14px;font:16px/1.4 var(--body)}
::placeholder{color:var(--dim);opacity:1}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(198,244,50,.18)}
.stack{display:flex;flex-direction:column;gap:12px}
.note{margin-top:22px;font-size:13px;color:var(--dim)}
.msg-ok,.card .msg-ok{color:var(--accent);font-size:14px}
.msg-err,.card .msg-err{color:var(--danger);font-size:14px}

/* chat */
.chat-wrap{display:flex;flex-direction:column;height:calc(100dvh - 80px);flex:1 1 0;min-height:0;width:100%;max-width:860px;margin:0 auto}
body:has(> .chat-wrap:not([hidden])){height:100dvh;display:flex;flex-direction:column;overflow:hidden}
.plan-note{margin:0;padding:14px 20px 0;font-family:var(--mono);font-size:13px;color:var(--accent)}
.thread{flex:1;overflow-y:auto;padding:24px 20px;display:flex;flex-direction:column;gap:14px}
.bubble{max-width:min(620px,86%);padding:12px 16px;border-radius:18px;white-space:pre-wrap;overflow-wrap:anywhere}
.bubble.ai{align-self:flex-start;background:var(--card);border:1px solid var(--line-2);border-bottom-left-radius:6px}
.bubble.me{align-self:flex-end;background:var(--accent);color:var(--on-accent);border-bottom-right-radius:6px}
.bubble.err{align-self:flex-start;border:1px solid var(--danger);color:var(--danger);background:transparent}
.typing{align-self:flex-start;display:flex;gap:5px;padding:16px;background:var(--card);border:1px solid var(--line-2);border-radius:18px;border-bottom-left-radius:6px}
.typing i{width:7px;height:7px;border-radius:50%;background:var(--dim);animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.composer{border-top:1px solid var(--line);padding:12px 20px calc(12px + env(safe-area-inset-bottom));display:flex;gap:10px;align-items:flex-end;background:var(--bg)}
.composer textarea{flex:1;min-width:0;resize:none;max-height:160px;min-height:48px;line-height:1.4}
.send{width:48px;height:48px;min-height:48px;padding:0;flex:none}
.hint{font-size:12px;color:var(--dim);padding:0 20px 8px;text-align:center}

/* done */
.brief dl{margin:20px 0 0;display:grid;gap:16px}
.brief dt{font-family:var(--mono);font-size:12px;color:var(--dim);text-transform:uppercase;letter-spacing:.06em}
.brief dd{margin:4px 0 0}
.lead-card dl.brief:not(:empty){padding-top:16px;display:grid;gap:14px}
.brief ul{margin:4px 0 0;padding-left:18px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* admin */
.lead-card{border:1px solid var(--line-2);border-radius:16px;padding:20px;background:var(--bg-2)}
.lead-card + .lead-card{margin-top:14px}
.lead-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;align-items:flex-start}
.tag{font-family:var(--mono);font-size:12px;padding:4px 10px;border-radius:999px;border:1px solid var(--line-3);color:var(--muted);white-space:nowrap}
.tag.hot{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.lead-card details{margin-top:14px}
.lead-card summary{cursor:pointer;color:var(--muted);font-size:14px;min-height:32px}
.transcript{margin-top:10px;display:flex;flex-direction:column;gap:8px;font-size:14px}
.transcript .bubble{max-width:100%}
.admin-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
.admin-row > *{flex:1 1 200px}

/* ── LIGHT MODE ── */
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]){
    --bg:#F7F7F4; --bg-2:#FFFFFF; --card:#FFFFFF;
    --line:rgba(16,20,24,.08); --line-2:rgba(16,20,24,.12); --line-3:rgba(16,20,24,.20);
    --text:#101418; --muted:#3D4552; --dim:#6B7483;
    --accent:#1E3BD6; --on-accent:#FFFFFF; --danger:#DC2626;
    --nav-glass:rgba(247,247,244,.92); color-scheme:light;
  }
  :root:not([data-theme="dark"]) .brand svg rect,
  :root:not([data-theme="dark"]) .brand svg path:nth-child(2){stroke:#1E3BD6}
  :root:not([data-theme="dark"]) .brand svg path:nth-child(3){stroke:#3D4552}
  :root:not([data-theme="dark"]) input:focus,
  :root:not([data-theme="dark"]) textarea:focus,
  :root:not([data-theme="dark"]) select:focus{box-shadow:0 0 0 3px rgba(30,59,214,.18)}
}
:root[data-theme="light"]{
  --bg:#F7F7F4; --bg-2:#FFFFFF; --card:#FFFFFF;
  --line:rgba(16,20,24,.08); --line-2:rgba(16,20,24,.12); --line-3:rgba(16,20,24,.20);
  --text:#101418; --muted:#3D4552; --dim:#6B7483;
  --accent:#1E3BD6; --on-accent:#FFFFFF; --danger:#DC2626;
  --nav-glass:rgba(247,247,244,.92); color-scheme:light;
}
:root[data-theme="light"] .brand svg rect,
:root[data-theme="light"] .brand svg path:nth-child(2){stroke:#1E3BD6}
:root[data-theme="light"] .brand svg path:nth-child(3){stroke:#3D4552}
:root[data-theme="light"] input:focus,
:root[data-theme="light"] textarea:focus,
:root[data-theme="light"] select:focus{box-shadow:0 0 0 3px rgba(30,59,214,.18)}