:root{
  --navy:#050505;
  --black:#050505;
  --steel:#0F5173;
  --steel-dark:#0A3A54;
  --steel-light:#E4EDF1;
  --paper:#F3ECDC;
  --card-field:#FAF7F0;
  --amber:#0F5173;
  --amber-dark:#0A3A54;
  --ink:#050505;
  --muted:#6B6255;
  --line:#E0D2AE;
  --good:#2E7D5B;
  --bad:#C0432F;
  --radius:14px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;min-height:100%;}
html{background:var(--steel);}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--steel); color:var(--ink); -webkit-tap-highlight-color:transparent;
}
.app{
  max-width:480px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;
  background:var(--paper);border:2.5px solid var(--steel);border-radius:22px;overflow:hidden;
}
.topbar{background:var(--black);color:#fff;padding:16px 18px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:20;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{width:34px;height:34px;border-radius:50%;overflow:hidden;background:#fff;display:flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,0.15);}
.brand-mark img{width:100%;height:100%;object-fit:cover;}
.brand-text{font-weight:700;font-size:16px;}
.brand-sub{font-size:10.5px;color:#D9C7A3;font-weight:600;text-transform:uppercase;letter-spacing:0.3px;}
.topbar select, .topbar a.logout{background:rgba(255,255,255,0.1);color:#fff;border:1px solid rgba(255,255,255,0.25);border-radius:8px;padding:6px 8px;font-size:12px;font-weight:600;text-decoration:none;}
main{flex:1;padding:18px 18px 24px;}
h1.page-title{font-size:20px;margin:2px 0 4px;color:var(--black);font-weight:800;}
p.page-sub{font-size:13px;color:var(--muted);margin:0 0 18px;line-height:1.5;}
.card{background:#fff;border:2px solid var(--black);border-radius:var(--radius);padding:16px;margin-bottom:14px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:12.5px;font-weight:700;color:var(--steel);text-transform:uppercase;letter-spacing:.2px;margin-bottom:6px;}
input[type=text],input[type=number],input[type=password],input[type=date],input[type=file],textarea,select{
  width:100%;padding:12px 13px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;color:var(--ink);background:var(--card-field);
}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--steel);}
textarea{resize:vertical;min-height:56px;}
button, .btn{font-family:inherit;cursor:pointer;border:none;}
.btn-primary{display:block;width:100%;background:var(--steel);color:#fff;padding:15px;border-radius:12px;font-size:15.5px;font-weight:800;text-align:center;text-decoration:none;box-shadow:0 3px 0 var(--steel-dark);box-sizing:border-box;}
.btn-secondary{display:block;width:100%;background:var(--steel-light);color:var(--steel);padding:14px;border-radius:12px;font-size:14.5px;font-weight:700;border:1.5px solid #CBDCE3;text-align:center;text-decoration:none;box-sizing:border-box;}
.btn-row{display:flex;gap:10px;margin-top:10px;}
.btn-row > *{flex:1;}
.readonly-chip{display:inline-flex;align-items:center;gap:6px;background:var(--steel-light);color:var(--steel);padding:9px 13px;border-radius:10px;font-size:14px;font-weight:700;border:1.5px solid #CBDCE3;}
nav.tabbar{background:#fff;border-top:2px solid var(--black);display:flex;padding:9px 6px calc(9px + env(safe-area-inset-bottom));z-index:20;}
nav.tabbar a{flex:1;background:none;display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 2px;color:#8A8168;font-size:10.5px;font-weight:700;border-radius:10px;text-decoration:none;}
nav.tabbar a.active{color:var(--steel);}
nav.tabbar a .icon{font-size:19px;}
.history-item{display:flex;justify-content:space-between;align-items:center;border:1.5px solid var(--line);border-radius:12px;padding:13px 14px;margin-bottom:10px;background:#fff;}
.history-item .num{font-family:ui-monospace,monospace;font-size:12px;color:var(--muted);}
.history-item .cl{font-weight:700;font-size:14.5px;color:var(--ink);}
.history-item .ch{font-size:12px;color:var(--muted);}
.history-item .amt{font-weight:800;color:var(--steel);font-size:16px;}
.paid-toggle{margin-top:6px;font-size:10.5px;font-weight:800;padding:5px 10px;border-radius:20px;letter-spacing:0.3px;text-decoration:none;display:inline-block;}
.paid-toggle.is-paid{background:#E4F3EC;color:var(--good);}
.paid-toggle.is-unpaid{background:#FBEAE6;color:var(--bad);}
.empty-state{text-align:center;padding:50px 20px;color:var(--muted);}
.empty-state .big{font-size:38px;margin-bottom:10px;}
.info-banner{background:#FFF6E8;border:1.5px solid #F0D9A8;color:#8A5E12;border-radius:10px;padding:11px 13px;font-size:12px;line-height:1.5;margin-bottom:16px;}
.error-banner{background:#FBEAE6;border:1.5px solid #F0BDB0;color:var(--bad);border-radius:10px;padding:11px 13px;font-size:13px;margin-bottom:16px;}
.success-banner{background:#E4F3EC;border:1.5px solid #BFE3D1;color:var(--good);border-radius:10px;padding:11px 13px;font-size:13px;margin-bottom:16px;}
.divider{height:1px;background:var(--line);margin:18px 0;}
.section-label{font-size:11.5px;font-weight:800;color:var(--muted);text-transform:uppercase;letter-spacing:0.5px;margin:0 0 10px;}
.login-wrap{max-width:400px;margin:60px auto;padding:0 20px;}
.login-logo{width:88px;height:88px;margin:0 auto 20px;border-radius:50%;overflow:hidden;box-shadow:0 8px 24px rgba(5,5,5,0.25);}
.login-logo img{width:100%;height:100%;object-fit:cover;}