:root{--bg:#0d0f12;--panel:#171a1f;--text:#f5f5f5;--muted:#a8adb6;--accent:#f6a21a;--accent2:#ffd166;--line:#2a2f38}*{box-sizing:border-box}body{margin:0;font-family:Arial,'Helvetica Neue',sans-serif;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}.site-header{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:center;padding:18px 6vw;background:rgba(13,15,18,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.brand{font-weight:800;color:var(--accent2)}.hero{min-height:78vh;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;padding:70px 6vw;background:radial-gradient(circle at 70% 20%,rgba(246,162,26,.18),transparent 36%)}.hero h1{font-size:clamp(42px,6vw,82px);line-height:.95;margin:10px 0}.hero p{color:var(--muted);font-size:18px;max-width:780px}.eyebrow{color:var(--accent)!important;text-transform:uppercase;font-weight:700;letter-spacing:.14em}.btn{display:inline-block;border:0;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#1a1200;padding:12px 20px;border-radius:12px;font-weight:800;cursor:pointer}.small{padding:8px 12px;font-size:14px}.hero-card,.panel,.features article{background:linear-gradient(180deg,#1a1e25,#111418);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:0 20px 60px rgba(0,0,0,.24)}.features{padding:40px 6vw 80px}.grid,.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer{padding:36px 6vw;background:#07080a;color:var(--muted)}.notfound{text-align:center;padding:100px 20px}.auth-body{display:grid;place-items:center;min-height:100vh}.login-card{width:min(420px,92vw);background:var(--panel);padding:30px;border:1px solid var(--line);border-radius:24px}.login-card input,label,.panel input,.panel textarea,.panel select,.chat-form textarea,.chat-form select{display:block;width:100%;margin:8px 0 14px}.login-card input,.panel input,.panel textarea,.panel select,.chat-form textarea,.chat-form select{background:#0b0d10;border:1px solid var(--line);color:var(--text);padding:12px;border-radius:10px}.alert{padding:12px;border-radius:12px;margin:0 0 16px}.ok{background:#10351d;color:#a4f4b4}.err{background:#3b1010;color:#ffb2b2}.admin-body{display:grid;grid-template-columns:250px 1fr;min-height:100vh}.admin-sidebar{background:#101318;border-right:1px solid var(--line);padding:20px;display:flex;flex-direction:column;gap:10px}.admin-sidebar a,.admin-sidebar button{padding:10px;border-radius:10px;background:#171b22;color:#fff;border:0;text-align:left}.admin-main{padding:28px;overflow:auto}.stats div{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px}.stats b{display:block;font-size:34px;color:var(--accent2)}.table{width:100%;border-collapse:collapse;background:var(--panel);margin-top:18px}.table th,.table td{border-bottom:1px solid var(--line);padding:12px;text-align:left}.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.muted{color:var(--muted)}.chat-shell{display:grid;grid-template-columns:280px 1fr;height:100vh}.chat-side{background:#101318;border-right:1px solid var(--line);padding:18px;overflow:auto}.chat-side a,.chat-side button{display:block;width:100%;margin:8px 0;padding:10px;border-radius:10px;background:#171b22;color:#fff;border:0;text-align:left}.chat-main{display:flex;flex-direction:column;height:100vh}.messages{flex:1;overflow:auto;padding:24px}.msg{max-width:900px;margin:0 auto 16px;padding:16px;border-radius:16px;border:1px solid var(--line);background:#151920}.msg.user{background:#221a0f}.chat-form{border-top:1px solid var(--line);padding:14px;display:grid;grid-template-columns:220px 1fr auto;gap:10px;background:#101318}@media(max-width:850px){.hero{grid-template-columns:1fr}.grid,.stats,.form-grid{grid-template-columns:1fr}.admin-body,.chat-shell{grid-template-columns:1fr;height:auto}.chat-form{grid-template-columns:1fr}.hero h1{font-size:42px}}
.brand-with-logo{display:flex;align-items:center;gap:10px}.brand-with-logo img{width:38px;height:38px;object-fit:contain;border-radius:8px}.hero-logo{max-width:180px;max-height:80px;object-fit:contain;margin-bottom:16px}.pro-hero{background:radial-gradient(circle at 72% 18%,rgba(255,209,102,.22),transparent 34%),radial-gradient(circle at 8% 80%,rgba(246,162,26,.12),transparent 32%),linear-gradient(135deg,#0d0f12,#12161d)}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.ghost-btn{display:inline-block;border:1px solid var(--line);color:var(--text);padding:12px 20px;border-radius:12px;font-weight:800;background:rgba(255,255,255,.04)}.premium-card{position:relative;overflow:hidden}.premium-card:before{content:"";position:absolute;inset:-1px;background:linear-gradient(135deg,rgba(246,162,26,.24),transparent 45%);pointer-events:none}.logo-preview{max-width:220px;max-height:90px;display:block;background:#fff;padding:10px;border-radius:12px;margin:8px 0 16px}.inline-edit{display:grid;grid-template-columns:1.1fr .8fr 1.4fr .75fr 1.2fr auto;gap:8px;align-items:center}.inline-edit input,.inline-edit select{margin:0!important}.inline-edit.model-edit{grid-template-columns:1fr 1fr 1.2fr 1.7fr .8fr .8fr .75fr 1fr auto}.delete-form{display:inline-block;margin-top:8px}.danger{background:#4b1515!important;color:#ffdddd!important}@media(max-width:1100px){.inline-edit,.inline-edit.model-edit{grid-template-columns:1fr}.delete-form{display:block}.hero-actions{display:block}.ghost-btn{margin-top:10px}}

/* VTL AI Chat usability patch */
body, input, textarea, select, button { font-family: 'Inter', Arial, 'Helvetica Neue', sans-serif; }
.chat-brand { margin-bottom: 22px; }
.chat-logo-text { font-size: 24px; font-weight: 900; letter-spacing: -.03em; }
.chat-user { color: var(--muted); font-size: 13px; margin-top: 6px; }
.full { width: 100%; text-align: center!important; }
.side-link { font-weight: 700; }
.side-title { font-size: 12px; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin: 14px 0 8px; }
.side-empty { font-size: 13px; margin: 8px 0; }
.welcome-card { max-width: 920px; margin: 20px auto; padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: radial-gradient(circle at 80% 20%, rgba(246,162,26,.16), transparent 32%), linear-gradient(180deg,#171b22,#111418); }
.welcome-card h1 { margin: 8px 0 10px; font-size: clamp(28px,4vw,46px); line-height: 1.05; }
.welcome-card p { color: var(--muted); max-width: 760px; }
.chat-form { grid-template-columns: 230px 1fr 72px; align-items: stretch; gap: 10px; }
.chat-model-wrap label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.chat-model-wrap select { height: 74px; margin: 0; }
.chat-input-wrap textarea { min-height: 74px; margin: 0; resize: vertical; }
.upload-row { display: flex; gap: 10px; align-items: center; margin-top: 8px; flex-wrap: wrap; }
.upload-btn { display: inline-flex; align-items: center; justify-content: center; cursor: pointer; border: 1px solid var(--line); background: rgba(255,255,255,.04); color: var(--text); border-radius: 10px; padding: 8px 12px; font-size: 13px; font-weight: 700; }
.upload-btn input { display: none; }
.file-preview { font-size: 13px; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.send-btn { min-height: 74px; }
.msg p { white-space: normal; line-height: 1.58; }
.msg strong { display: block; margin-bottom: 8px; color: var(--accent2); }
@media(max-width:850px){.chat-form{grid-template-columns:1fr}.chat-side{min-height:auto}.chat-main{min-height:calc(100vh - 260px)}.send-btn{min-height:54px}.chat-model-wrap select{height:auto}.file-preview{white-space:normal}}