:root{--nav:#243956;--bg:#eef3f8;--card:#fff;--line:#cbd6e3;--text:#132033;--muted:#64748b;--green:#17a969;--red:#e84855;--blue:#263d61;--shadow:0 12px 30px rgba(20,34,55,.12)}
*{box-sizing:border-box}body{margin:0;font-family:Arial,'Noto Sans Thai',sans-serif;background:var(--bg);color:var(--text)}a{color:var(--blue);font-weight:800;text-decoration:none}.wrap{max-width:1120px;margin:0 auto;padding:18px}.nav{background:var(--nav);color:#fff;border-radius:18px;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;box-shadow:var(--shadow)}.nav h1{font-size:22px;margin:0}.nav p{margin:3px 0 0;font-size:12px;opacity:.9}.nav .links{display:flex;gap:8px;flex-wrap:wrap}.btn,button{border:1px solid var(--line);border-radius:13px;padding:10px 14px;background:white;font-weight:900;color:var(--text);cursor:pointer;display:inline-block}.btn.primary,button.primary{background:var(--blue);border-color:var(--blue);color:white}.btn.green,button.green{background:var(--green);border-color:var(--green);color:white}.btn.red,button.red{background:var(--red);border-color:var(--red);color:white}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px;margin-top:16px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}.form{max-width:460px;margin:30px auto}.field{margin:12px 0}.field label{display:block;font-size:13px;color:var(--muted);font-weight:800;margin-bottom:6px}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:13px;padding:12px;background:white;font-weight:700;color:var(--text);outline:none}.alert{border-radius:14px;padding:12px;margin:12px 0;font-weight:800}.alert.red{background:#ffe8eb;color:#a41725}.alert.green{background:#e8fff3;color:#08713f}.alert.warn{background:#fff5d6;color:#9b6700}.muted{color:var(--muted);font-size:13px}.table{width:100%;border-collapse:collapse;background:white}.table th,.table td{border-bottom:1px solid var(--line);padding:10px;text-align:left;font-size:14px}.badge{padding:5px 9px;border-radius:99px;font-size:12px;font-weight:900;display:inline-block}.badge.green{background:#dcfce7;color:#166534}.badge.red{background:#fee2e2;color:#991b1b}.badge.warn{background:#fef3c7;color:#92400e}.price{font-size:32px;font-weight:900}.center{text-align:center}@media(max-width:760px){.wrap{padding:0 0 14px}.nav{border-radius:0}.nav{align-items:flex-start;flex-direction:column}.card{border-radius:14px;margin:12px}.table{font-size:12px}.table th,.table td{padding:8px}}