:root{--primary: #1e3a8a;--primary-dark: #172554;--bg: #ffffff;--card: #ffffff;--text: #1a2027;--muted: #6b7683;--border: #e2e6ea;--danger: #d1453b;--warn-bg: #fff7e6;--warn-border: #ffd591;--radius: 14px;--shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 4px 16px rgba(0, 0, 0, .04)}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Sarabun,Segoe UI,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}.app{max-width:640px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}.appbar{background:var(--primary);color:#fff;padding:16px 18px;font-weight:700;font-size:1.1rem;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}.appbar .logout{background:#fff3;border:none;color:#fff;padding:6px 12px;border-radius:8px;font-size:.85rem}.content{padding:16px;flex:1}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);padding:18px;margin-bottom:16px}.card h2{font-size:1.05rem;margin-bottom:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:12px;padding:14px 18px;font-size:1rem;font-weight:600;cursor:pointer;font-family:inherit;transition:filter .15s}.btn:active{filter:brightness(.94)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-ghost{background:#eef1f4;color:var(--text)}.btn-danger{background:#fdecea;color:var(--danger)}.btn-block{width:100%}.field{margin-bottom:14px}.field label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:5px;font-weight:600}input,select,textarea{width:100%;padding:12px;border:1.5px solid var(--border);border-radius:10px;font-size:1rem;font-family:inherit;background:#fff;color:var(--text)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary)}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:10px}.item{border:1px solid var(--border);border-radius:12px;padding:12px;margin-bottom:10px;background:#fafbfc}.item-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px}.item-head input{font-weight:600}.item-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}.item-grid .field{margin-bottom:0}.item-grid label{font-size:.75rem}.remove-item{background:none;border:none;color:var(--danger);font-size:1.3rem;padding:0 4px;cursor:pointer;flex-shrink:0}.summary-row{display:flex;justify-content:space-between;padding:6px 0;font-size:.95rem}.summary-row.total{border-top:2px solid var(--border);margin-top:6px;padding-top:10px;font-weight:700;font-size:1.15rem;color:var(--primary)}.warning-box{background:var(--warn-bg);border:1px solid var(--warn-border);border-radius:10px;padding:10px 12px;margin-bottom:14px;font-size:.9rem}.warning-box ul{margin-left:18px}.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:600}.badge-green{background:#e3f6ee;color:#0a805a}.badge-amber{background:var(--warn-bg);color:#b06f00}.bill-image{width:100%;border-radius:10px;border:1px solid var(--border);margin-bottom:14px}.toggle-row{display:flex;align-items:center;gap:10px;padding:10px 0}.toggle-row input[type=checkbox]{width:22px;height:22px}.drop{border:2px dashed var(--border);border-radius:var(--radius);padding:40px 20px;text-align:center;color:var(--muted);background:#fff}.drop .big{font-size:3rem;margin-bottom:8px}.center-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;gap:16px}.pin-input{font-size:1.6rem;text-align:center;letter-spacing:8px;max-width:220px}.spinner{width:44px;height:44px;border:4px solid #e2e6ea;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.muted{color:var(--muted);font-size:.9rem}.error-text{color:var(--danger);font-size:.9rem}.success-icon{font-size:4rem}.doc-number{font-size:1.8rem;font-weight:700;color:var(--primary)}