:root{--blue:#40588f;--light:#f4f6fa;--dark:#22304d;--danger:#b42318;--ok:#067647}*{box-sizing:border-box}body{margin:0;font-family:Arial,"Noto Sans TC",sans-serif;background:var(--light);color:#222}.topbar{height:58px;background:#fff;border-bottom:1px solid #d8deea;display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:5}.brand{font-size:20px;font-weight:700}.brand span{color:var(--blue)}a{color:var(--blue);text-decoration:none}.app{display:flex;min-height:calc(100vh - 58px)}.sidebar{width:220px;background:var(--dark);padding:18px 10px}.sidebar a{display:block;color:#fff;padding:12px 14px;border-radius:6px;margin:3px 0}.sidebar a:hover{background:#35486d}.content{flex:1;padding:24px;max-width:1500px}.card{background:#fff;border:1px solid #dfe4ee;border-radius:8px;padding:18px;margin-bottom:18px;box-shadow:0 2px 7px rgba(0,0,0,.03)}h1{font-size:26px;margin:0 0 18px}h2{font-size:18px;margin:0 0 12px;color:var(--dark)}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:12px}.col-12{grid-column:span 12}.col-6{grid-column:span 6}.col-4{grid-column:span 4}.col-3{grid-column:span 3}.col-2{grid-column:span 2}label{display:block;font-size:13px;font-weight:700;margin-bottom:5px;color:#344054}input,select,textarea{width:100%;padding:9px 10px;border:1px solid #cbd3e1;border-radius:5px;background:#fff;font-size:14px}textarea{min-height:90px;resize:vertical}.btn{display:inline-block;border:0;border-radius:5px;padding:9px 14px;cursor:pointer;font-weight:700;background:#e9edf5;color:#26344f}.btn-primary{background:var(--blue);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-success{background:var(--ok);color:#fff}.btn-sm{padding:6px 9px;font-size:12px}.toolbar{display:flex;gap:8px;align-items:center;justify-content:space-between;margin-bottom:14px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:9px;border-bottom:1px solid #e5e9f0;text-align:left;white-space:nowrap}th{background:#eef1f7;color:#344054;font-size:13px}.right{text-align:right}.center{text-align:center}.muted{color:#667085}.badge{padding:3px 8px;border-radius:10px;background:#e8edf7;font-size:12px}.alert{padding:12px;border-radius:6px;margin-bottom:14px;background:#eef2f8}.alert.success{background:#ecfdf3;color:#067647}.alert.error{background:#fef3f2;color:#b42318}.login-wrap{max-width:440px;margin:80px auto;padding:20px}.login-card{background:#fff;border-radius:10px;padding:28px;box-shadow:0 8px 30px rgba(0,0,0,.08)}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.stat{background:#fff;border-left:5px solid var(--blue);padding:18px;border-radius:7px}.stat strong{font-size:27px;display:block}.invoice-items input,.invoice-items select{min-width:80px}.invoice-items .desc{min-width:180px}.totals{margin-left:auto;width:420px}.totals .row{display:grid;grid-template-columns:1fr 150px;align-items:center;margin:6px 0}.totals input{text-align:right}.section-title{background:var(--blue);color:#fff;padding:7px 10px;font-weight:700;margin:-18px -18px 15px}.danger-zone{border-color:#f4b4ae}@media(max-width:900px){.sidebar{width:170px}.grid{display:block}.grid>div{margin-bottom:10px}.stats{grid-template-columns:1fr 1fr}.content{padding:12px}}