:root{--primary:#2563eb;--primary-dark:#1d4ed8;--bg:#f8fafc;--card:#fff;--border:#e2e8f0;--text:#1e293b;--text-muted:#64748b;--danger:#ef4444;--success:#22c55e;--warning:#f59e0b;--radius:8px;--shadow:0 1px 3px rgba(0,0,0,.1)}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Apple SD Gothic Neo',Pretendard,system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--primary);text-decoration:none}
nav{background:#fff;border-bottom:1px solid var(--border);padding:0 24px;display:flex;align-items:center;height:56px;gap:24px;position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}
.nav-logo{font-weight:700;font-size:16px;color:var(--primary);margin-right:16px}
.nav-links{display:flex;gap:4px;flex:1}
.nav-links a{padding:6px 14px;border-radius:var(--radius);color:var(--text-muted);font-weight:500;transition:.15s}
.nav-links a:hover,.nav-links a.active{background:var(--bg);color:var(--primary)}
.nav-user{display:flex;align-items:center;gap:12px;color:var(--text-muted);font-size:13px}
.btn-logout{background:none;border:1px solid var(--border);padding:5px 12px;border-radius:var(--radius);cursor:pointer;color:var(--text-muted);font-size:13px}
.btn-logout:hover{background:var(--bg)}
main{max-width:1100px;margin:0 auto;padding:28px 24px}
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.page-title{font-size:20px;font-weight:700}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);border:none;cursor:pointer;font-size:14px;font-weight:500;transition:.15s}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:#fff;color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg)}
.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{opacity:.9}
.btn-sm{padding:5px 10px;font-size:13px}
.badge{display:inline-block;padding:2px 10px;border-radius:99px;font-size:12px;font-weight:600}
.badge-draft{background:#f1f5f9;color:#64748b}
.badge-submitted{background:#dbeafe;color:#1d4ed8}
.badge-approved{background:#dcfce7;color:#15803d}
.badge-rejected{background:#fee2e2;color:#b91c1c}
table{width:100%;border-collapse:collapse;font-size:14px}
th{background:var(--bg);padding:10px 12px;text-align:left;font-weight:600;border-bottom:2px solid var(--border);white-space:nowrap}
td{padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:middle}
tr:hover td{background:#f8fafc}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-weight:500;margin-bottom:6px;color:var(--text)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:#fff;color:var(--text)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.filters select,.filters input{padding:7px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;background:#fff}
.items-table th,.items-table td{padding:8px 10px}
.items-table input,.items-table select{padding:5px 8px;border:1px solid var(--border);border-radius:4px;font-size:13px;width:100%}
.total-row{font-weight:700;background:#f0f7ff}
.toast{position:fixed;bottom:24px;right:24px;background:#1e293b;color:#fff;padding:12px 20px;border-radius:var(--radius);font-size:14px;z-index:9999;animation:fadeIn .2s}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:1000;display:flex;align-items:center;justify-content:center}
.modal{background:#fff;border-radius:var(--radius);padding:24px;min-width:360px;max-width:800px;width:90%;box-shadow:0 8px 32px rgba(0,0,0,.15)}
.modal h3{margin-bottom:16px;font-size:17px}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}
.login-box{background:#fff;border-radius:12px;padding:40px;width:100%;max-width:380px;box-shadow:0 4px 24px rgba(0,0,0,.08)}
.login-title{font-size:22px;font-weight:700;color:var(--primary);margin-bottom:4px}
.login-sub{color:var(--text-muted);margin-bottom:28px;font-size:13px}
@media(max-width:640px){main{padding:16px}nav{padding:0 16px}.nav-links a{padding:6px 10px;font-size:13px}}
.badge-advance{background:#fef3c7;color:#92400e}
.btn-print{background:#059669;color:#fff}.btn-print:hover{background:#047857}
@media print{
  nav,.filters,.page-header .btn,.btn-print,.no-print{display:none!important}
  body{background:#fff;font-size:12px}
  main{max-width:100%;padding:0}
  .card{border:1px solid #000;box-shadow:none;page-break-inside:avoid;margin-bottom:8px}
  table{font-size:11px}
  th{background:#eee!important}
}
.print-header{display:none}
@media print{.print-header{display:block;text-align:center;margin-bottom:16px}}
.print-header h1{font-size:18px;margin-bottom:4px}
.print-header p{font-size:12px;color:#666}
.print-sign{display:none}
@media print{.print-sign{display:flex;justify-content:flex-end;gap:40px;margin-top:24px;padding-top:12px}}
.print-sign div{text-align:center;width:100px}
.print-sign .sign-line{border-top:1px solid #000;margin-top:40px;padding-top:4px;font-size:11px}

/* detail view */
.detail-val{padding:8px 12px;background:var(--bg);border-radius:var(--radius);font-size:14px;color:var(--text);border:1px solid var(--border)}
.btn-success{background:#22c55e;color:#fff}.btn-success:hover{background:#16a34a}
.badge-settlement{background:#e0e7ff;color:#3730a3}