:root{--bg:#f6f7f9;--panel:#fff;--ink:#1b1f24;--muted:#5f6b7a;--line:#e3e7ec;--accent:#3297ff;--danger:#c62828;--ok:#3bb66f;--radius:10px;color:var(--ink);background:var(--bg);font-family:Sarabun,system-ui,-apple-system,Segoe UI,sans-serif;font-size:16px;line-height:1.5}*{box-sizing:border-box}body{min-height:100vh;margin:0}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{margin:0 0 .5rem;font-weight:600;line-height:1.25}h1{font-size:1.5rem}h2{font-size:1.2rem}p{margin:0 0 1rem}.muted{color:var(--muted)}.error{color:var(--danger)}.topbar{background:var(--panel);border-bottom:1px solid var(--line);align-items:center;gap:1rem;padding:.75rem 1.25rem;display:flex}.topbar .brand{color:var(--ink);font-weight:700}.topbar nav{flex:1;gap:1rem;display:flex}.topbar nav a{color:var(--muted)}.topbar nav a.active,.topbar nav a:hover{color:var(--ink);text-decoration:none}.page{max-width:960px;margin:0 auto;padding:1.5rem 1.25rem}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:1rem;padding:1.25rem}.center{place-items:center;min-height:100vh;padding:1rem;display:grid}.center .card{width:min(100%,420px)}.field{gap:.25rem;margin-bottom:.9rem;display:grid}.field label{color:var(--muted);font-size:.9rem}.field input,.field select,.field textarea,select.compact{font:inherit;border:1px solid var(--line);color:var(--ink);background:#fff;border-radius:8px;padding:.5rem .65rem}.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:#0000}.field.invalid input,.field.invalid select{border-color:var(--danger);background:#fff6f6}.row{flex-wrap:wrap;align-items:end;gap:.75rem;display:flex}.row>.field{flex:140px;margin-bottom:0}.btn{font:inherit;border:1px solid var(--line);color:var(--ink);cursor:pointer;background:#fff;border-radius:8px;padding:.55rem 1rem}.btn:hover{background:#f1f3f6}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{filter:brightness(.95)}.btn:disabled{opacity:.6;cursor:default}.btn.google{justify-content:center;align-items:center;gap:.6rem;width:100%;padding:.7rem;display:inline-flex}.stack{gap:.75rem;display:grid}.actions{gap:.6rem;margin-top:1rem;display:flex}.callout{border-left:4px solid var(--accent);background:#eef6ff;border-radius:6px;margin-bottom:1rem;padding:.75rem 1rem}.callout.warn{background:#fff8e5;border-color:#e0a100}.table{border-collapse:collapse;width:100%}.table th,.table td{text-align:left;border-bottom:1px solid var(--line);padding:.5rem .6rem;font-size:.95rem}.table th{color:var(--muted);font-weight:600}