:root{--bg:#fff7ed;--card:#fff;--fg:#1f2937;--muted:#6b7280;--primary:#f97316;--primary-dark:#ea580c;--border:#fed7aa;--ok:#16a34a;--err:#dc2626}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--fg);line-height:1.5}
a{color:var(--primary-dark);text-decoration:none}a:hover{text-decoration:underline}
.top{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.brand{font-weight:700;font-size:1.2rem;color:var(--primary-dark)}
.top nav a{margin-left:14px;color:var(--fg)}
.container{max-width:1100px;margin:24px auto;padding:0 16px}
.btn,button.btn,input[type=submit]{display:inline-block;background:var(--primary);color:#fff;padding:10px 18px;border-radius:8px;border:0;font-weight:600;cursor:pointer;font-size:1rem}
.btn:hover{background:var(--primary-dark);text-decoration:none;color:#fff}
.btn.outline{background:#fff;color:var(--primary-dark);border:1px solid var(--primary)}
.btn.danger{background:var(--err)}
.btn.sm{padding:6px 12px;font-size:.9rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px;box-shadow:0 4px 12px rgba(249,115,22,.06)}
.grid{display:grid;gap:16px}.grid.cols-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.grid.cols-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
label{display:block;margin-top:12px;font-weight:500;font-size:.92rem}
input,select,textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;font-size:1rem;font-family:inherit;background:#fff}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary)}
textarea{min-height:80px;resize:vertical}
.flash{background:#dcfce7;color:#166534;padding:12px 24px;border-bottom:1px solid #bbf7d0}
.foot{text-align:center;color:var(--muted);padding:24px;font-size:.9rem}
.hero{text-align:center;padding:60px 16px}.hero h1{font-size:2.6rem;margin:0 0 16px}.hero p{color:var(--muted);font-size:1.15rem;max-width:600px;margin:0 auto 24px}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:40px}
.product{display:flex;gap:14px;border:1px solid var(--border);border-radius:12px;padding:14px;background:#fff;align-items:center}
.product img{width:90px;height:90px;object-fit:cover;border-radius:8px;background:#f3f4f6}
.product .info{flex:1}.product h3{margin:0 0 4px;font-size:1.05rem}
.price{color:var(--primary-dark);font-weight:700}
.muted{color:var(--muted);font-size:.9rem}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:10px;border-bottom:1px solid var(--border);text-align:left;font-size:.95rem}th{background:#fff7ed}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.78rem;background:#fef3c7;color:#92400e}
.tabs{display:flex;gap:8px;margin-bottom:16px;border-bottom:1px solid var(--border)}
.tabs a{padding:10px 16px;color:var(--muted);border-bottom:2px solid transparent}
.tabs a.active{color:var(--primary-dark);border-color:var(--primary)}
.cart{position:sticky;top:80px}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal.open{display:flex}.modal .box{background:#fff;border-radius:12px;padding:24px;max-width:500px;width:100%;max-height:90vh;overflow:auto}
@media(max-width:600px){.hero h1{font-size:2rem}.top{padding:12px 16px}.top nav a{margin-left:8px;font-size:.9rem}}


.ai-float{position:fixed;right:18px;bottom:18px;z-index:1000;font-family:inherit}
.ai-toggle{background:var(--primary);color:#fff;border:0;border-radius:999px;padding:12px 16px;font-weight:700;box-shadow:0 8px 20px rgba(0,0,0,.18);cursor:pointer}
.ai-box{display:none;position:absolute;right:0;bottom:58px;width:340px;max-width:calc(100vw - 32px);background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:0 14px 35px rgba(0,0,0,.18);overflow:hidden}
.ai-box.open{display:block}.ai-head{display:flex;align-items:center;justify-content:space-between;background:var(--primary);color:#fff;padding:12px 14px}.ai-head button{background:transparent;border:0;color:#fff;font-size:1.4rem;cursor:pointer}
.ai-body{height:300px;overflow:auto;padding:12px;background:#fff7ed}.ai-msg{padding:9px 11px;border-radius:12px;margin:8px 0;font-size:.92rem;line-height:1.35}.ai-msg.bot{background:#fff;border:1px solid var(--border);color:var(--fg)}.ai-msg.user{background:var(--primary);color:#fff;margin-left:35px}.ai-msg.error{background:#fee2e2;border-color:#fecaca;color:#991b1b}.ai-form{display:flex;gap:6px;padding:10px;border-top:1px solid var(--border);background:#fff}.ai-form input{margin:0}.ai-form button{background:var(--primary);color:#fff;border:0;border-radius:8px;padding:0 12px;font-weight:700;cursor:pointer}.ai-answer{border-color:#bbf7d0;background:#f0fdf4}
@media(max-width:600px){.ai-box{width:calc(100vw - 32px);right:-2px}.ai-body{height:260px}}