:root{
  --bg:#000000; /* black */
  --panel:#111111; /* dark black */
  --muted:#666666; /* gray */
  --text:#ffffff; /* white */
  --brand:#ff6600; /* orange */
  --brand-2:#ff8533; /* light orange */
  --ok:#00cc00;
  --warn:#ff9900;
  --danger:#ff3333;
  --border:#333333;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial}
a{color:var(--brand)}
.nav{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:0}
.nav a{margin-right:12px;text-decoration:none}
.brand{display:flex;align-items:center;gap:8px}
.logo{width:24px;height:24px;border-radius:50%}
.logo.large{width:72px;height:72px;margin:0 auto 8px auto;display:block}
.nav-left a{font-weight:700}
.container{max-width:1000px;margin:24px auto;padding:0 16px}
.flashes{margin:12px 0}
.flash{padding:10px 12px;border-radius:8px;margin:8px 0;background:#0b1220;border:1px solid var(--border)}
.flash.success{border-color:var(--ok)}
.flash.warning{border-color:var(--warn)}
.flash.danger{border-color:var(--danger)}
.auth-card{max-width:420px;margin:64px auto;padding:24px;border:1px solid var(--border);background:var(--panel);border-radius:12px;text-align:center}
.auth-card h1{margin-top:0}
.form-grid{display:grid;grid-template-columns:1fr;gap:12px}
.form-grid.small{grid-template-columns:1fr}
label{display:flex;flex-direction:column;gap:6px;font-size:14px}
input{padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--panel);color:var(--text)}
.btn{display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(90deg,var(--brand),var(--brand-2));color:var(--bg);border:none;padding:10px 14px;border-radius:8px;text-decoration:none;font-weight:600;text-align:center}
.btn.small{padding:6px 10px;font-size:12px}
.muted{color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;margin:16px 0}
.stat{background:var(--panel);border:1px solid var(--border);padding:12px;border-radius:12px}
.stat .label{font-size:12px;color:var(--muted)}
.stat .value{font-size:18px;font-weight:700}
.stat .value.paid{color:var(--ok)}
.stat .value.unpaid{color:var(--danger)}
.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:12px;background:var(--panel)}
table{width:100%;border-collapse:collapse;min-width:700px}
th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}
th{position:sticky;top:0;background:var(--panel)}
.card{padding:12px;border:1px solid var(--border);border-radius:12px;background:var(--panel);margin:12px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.actions{display:flex;gap:8px;align-items:center;margin:12px 0}
.loan-section{margin:24px 0}
.loan-section h2{color:var(--brand);margin:12px 0 8px 0;font-size:18px}
.archived{opacity:0.7}
@media (max-width:640px){
  .form-grid{grid-template-columns:1fr}
}