:root{--bg:#f8fafc;--card:#fff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--brand:#1d4ed8;--brand-dark:#1e40af;--accent:#0d9488;--warn-bg:#fef3c7;--warn-line:#f59e0b;--radius:14px;--shadow:0 6px 24px #0f172a14;font-family:Sarabun,Noto Sans Thai,system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0}a{color:inherit}.main{min-height:70vh}.container{max-width:1120px;margin:0 auto;padding:0 16px}.page{padding-top:28px;padding-bottom:48px}.narrow{max-width:640px}.muted{color:var(--muted)}.small{font-size:.85rem}.link{color:var(--brand);font-weight:600;text-decoration:none}.link:hover{text-decoration:underline}.danger{color:#dc2626}.demo-strip{color:#fde68a;text-align:center;background:#0f172a;padding:8px 12px;font-size:.82rem}.nav-wrap{z-index:20;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);background:#fffffff2;position:sticky;top:0}.nav{flex-wrap:wrap;align-items:center;gap:16px;max-width:1120px;margin:0 auto;padding:10px 16px;display:flex}.brand{align-items:center;gap:10px;text-decoration:none;display:flex}.brand-mark{background:var(--brand);color:#fff;border-radius:10px;padding:8px 10px;font-weight:800}.brand-logo{object-fit:cover;border-radius:14px;width:60px;height:60px}.brand-text{flex-direction:column;font-size:1.7rem;font-weight:800;line-height:1.1;display:flex}.brand-text small{color:var(--muted);font-size:.85rem;font-weight:500}.nav-links{gap:4px;margin-inline-start:8px;display:flex}.nav-links a{color:#334155;border-radius:10px;padding:8px 12px;font-weight:600;text-decoration:none}.nav-links a.active,.nav-links a:hover{color:var(--brand-dark);background:#dbeafe}.nav-actions{flex-wrap:wrap;align-items:center;gap:8px;margin-inline-start:auto;display:flex}.user-chip{border:1px solid var(--line);text-overflow:ellipsis;white-space:nowrap;background:#f1f5f9;border-radius:999px;max-width:220px;padding:6px 10px;font-size:.82rem;overflow:hidden}.btn{cursor:pointer;border:1px solid #0000;border-radius:10px;padding:9px 14px;font-size:.92rem;font-weight:700}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark)}.btn-outline{border-color:var(--line);color:var(--ink);background:#fff}.btn-outline:hover{border-color:var(--brand);color:var(--brand-dark)}.btn-ghost{color:var(--ink);background:#f1f5f9}.btn-sm{padding:7px 10px;font-size:.85rem}.btn-lg{padding:12px 18px;font-size:1rem}.full{width:100%}.input{border:1px solid var(--line);background:#fff;border-radius:10px;width:100%;padding:10px 12px;font-size:.95rem}.input:focus{border-color:var(--brand);outline:2px solid #bfdbfe}.form{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);gap:12px;padding:20px;display:grid}.form label{gap:6px;font-weight:600;display:grid}.form-foot{gap:10px;margin-top:14px;display:grid}.error{color:#dc2626;background:#fee2e2;border:1px solid #fecaca;border-radius:10px;padding:10px}.notice{border-radius:12px;margin:12px 0;padding:12px 14px}.warn-box{background:var(--warn-bg);border:1px solid var(--warn-line)}.hero{grid-template-columns:1.1fr .9fr;align-items:center;gap:24px;padding:36px 16px 8px;display:grid}.hero h1{margin:12px 0;font-size:clamp(1.7rem,4vw,2.7rem);line-height:1.25}.hero-cta{flex-wrap:wrap;gap:10px;margin:14px 0;display:flex}.hero-points{color:#334155;gap:6px;padding:0;list-style:none;display:grid}.hero-art{min-height:280px;position:relative}.hero-doc{border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;border-radius:12px;width:190px;padding:14px;font-weight:700;position:absolute}.hero-doc span{color:#fff;background:#dc2626;border-radius:6px;margin-right:6px;padding:2px 8px;font-size:.72rem;display:inline-block}.d1{top:10px;left:10px;transform:rotate(-6deg)}.d2{background:#eff6ff;top:90px;left:130px;transform:rotate(3deg)}.d3{background:#f0fdfa;top:175px;left:30px;transform:rotate(-2deg)}.sec-title{margin:28px 0 12px;font-size:1.35rem}.sec-head{justify-content:space-between;align-items:end;display:flex}.grid4{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.grid3{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.grid2{grid-template-columns:1fr 1fr;gap:12px;display:grid}.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;display:flex;overflow:hidden}.cover{color:#fff;flex-direction:column;gap:8px;min-height:150px;padding:14px;text-decoration:none;display:flex}.cover-pdf{background:#ffffff40;border-radius:6px;align-self:flex-start;padding:3px 8px;font-size:.72rem;font-weight:800}.cover-pdf.big{font-size:.85rem}.cover-title{font-size:1rem;font-weight:800;line-height:1.4}.cover-meta{opacity:.9;font-size:.8rem}.card-body{gap:8px;padding:12px 14px 14px;display:grid}.pill{color:#3730a3;background:#eef2ff;border-radius:999px;justify-self:start;padding:3px 10px;font-size:.75rem;font-weight:700;display:inline-block}.pill-hot{color:#92400e;background:#fef3c7}.card-title{font-weight:800;line-height:1.4;text-decoration:none}.card-title:hover{color:var(--brand-dark)}.card-desc{color:var(--muted);min-height:2.6em;margin:0;font-size:.88rem}.card-meta{color:var(--muted);gap:6px;font-size:.82rem;display:flex}.card-foot{justify-content:space-between;align-items:center;gap:8px;margin-top:4px;display:flex}.price strong{font-size:1.05rem}.price s{color:var(--muted);margin-inline-start:6px;font-size:.82rem}.toolbar{grid-template-columns:1fr 170px 170px;gap:10px;margin:14px 0 18px;display:grid}.empty{border:1px dashed var(--line);text-align:center;border-radius:var(--radius);color:var(--muted);background:#fff;padding:36px}.detail-grid{grid-template-columns:.95fr 1.05fr;gap:20px;margin-top:12px;display:grid}.detail-cover{color:#fff;border-radius:var(--radius);flex-direction:column;gap:10px;padding:24px;display:flex}.preview-box{background:#0000004d;border:1px dashed #fff9;border-radius:10px;margin-top:10px;padding:14px;font-size:.88rem}.tags{gap:8px;display:flex}.tag{border:1px solid var(--line);background:#f1f5f9;border-radius:999px;padding:3px 10px;font-size:.8rem}.buy-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);gap:10px;margin-top:12px;padding:16px;display:grid}.price-lg strong{font-size:1.7rem}.price-lg s{color:var(--muted);margin-inline-start:8px}.buy-btns{flex-wrap:wrap;gap:10px;display:flex}.warn{background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:10px;padding:10px;font-size:.88rem}.spec{border:1px solid var(--line);background:#fff;border-radius:12px;padding:6px 14px}.spec div{border-bottom:1px solid #f1f5f9;justify-content:space-between;padding:8px 0;display:flex}.spec div:last-child{border-bottom:none}.spec dt{color:var(--muted)}.cart-line{border:1px solid var(--line);background:#fff;border-radius:12px;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;padding:12px 14px;display:flex}.cart-ctrl{align-items:center;gap:8px;display:flex}.total-row{justify-content:space-between;padding:12px 4px;font-size:1.1rem;display:flex}.order-list{gap:12px;display:grid}.order-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:16px}.order-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.steps ol{border:1px solid var(--line);border-radius:var(--radius);background:#fff;gap:8px;padding:20px 20px 20px 40px;display:grid}.admin-form{margin-bottom:22px}.form-row{flex-wrap:wrap;gap:8px;display:flex}.check{justify-content:center;align-items:center}.table-wrap{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow-x:auto}.table{border-collapse:collapse;width:100%;font-size:.9rem}.table th,.table td{border-bottom:1px solid var(--line);text-align:left;padding:10px 12px}.row-btns{gap:6px;display:flex}.footer{color:#cbd5e1;background:#0f172a;margin-top:40px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:20px;padding:32px 16px;display:grid}.footer strong{color:#fff}.footer-links{gap:6px;padding:0;list-style:none;display:grid}.footer-links a{color:#cbd5e1;text-decoration:none}.footer-bottom{text-align:center;border-top:1px solid #1e293b;padding:12px;font-size:.82rem}@media (width<=960px){.grid4{grid-template-columns:repeat(2,1fr)}.grid3,.hero{grid-template-columns:1fr}.hero-art{min-height:230px}.detail-grid,.toolbar,.footer-grid{grid-template-columns:1fr}.nav{gap:8px 10px}.nav-links{order:3;width:100%;overflow-x:auto}.brand-logo{border-radius:12px;width:48px;height:48px}.brand-text{font-size:1.35rem}.brand-text small{font-size:.8rem}.nav-actions{scrollbar-width:none;flex-wrap:nowrap;flex:auto;justify-content:flex-end;overflow-x:auto}.nav-actions::-webkit-scrollbar{display:none}.nav-actions .btn{white-space:nowrap;flex:none;padding:7px 10px;font-size:.8rem}.user-chip{max-width:120px;font-size:.78rem}.cart-label{display:none}}@media (width<=560px){.grid4,.grid2{grid-template-columns:1fr}.nav{gap:6px;padding:8px 10px}.brand-logo{width:44px;height:44px}.brand-text{font-size:1.2rem}.nav-actions{gap:6px}.nav-actions .btn{padding:6px 8px;font-size:.75rem}}