:root {
  --bg: #0b0f17;
  --panel: #131a26;
  --panel2: #1a2333;
  --border: #253044;
  --text: #e6ebf2;
  --muted: #8a96a8;
  --accent: #3b82f6;
  --accent2: #10b981;
  --danger: #ef4444;
  --warn: #f59e0b;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px; }
.center-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px;
}
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px;
}
.card + .card { margin-top: 16px; }
.auth-card { width: 100%; max-width: 400px; }
h1, h2, h3 { margin-top: 0; }
.brand { font-weight: 700; font-size: 1.3rem; letter-spacing: .5px; }
label { display: block; font-size: .85rem; color: var(--muted); margin: 14px 0 6px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=tel], select, textarea {
  width: 100%; padding: 10px 12px; background: var(--panel2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: .95rem;
}
input[type=file] { width: 100%; color: var(--muted); }
.radio-group { display: flex; gap: 12px; margin-top: 6px; }
.radio-group label { display: flex; align-items: center; gap: 6px; background: var(--panel2);
  border: 1px solid var(--border); padding: 10px 14px; border-radius: 8px; cursor: pointer; margin: 0; flex: 1; color: var(--text); }
.radio-group input { width: auto; }
button, .btn {
  display: inline-block; background: var(--accent); color: #fff; border: none; padding: 11px 18px;
  border-radius: 8px; font-size: .95rem; cursor: pointer; font-weight: 600;
}
button:hover, .btn:hover { filter: brightness(1.1); text-decoration: none; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: var(--danger); }
.btn-sm { padding: 6px 12px; font-size: .8rem; }
.btn-block { width: 100%; margin-top: 18px; }
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: .9rem; }
.flash-success { background: #10b98122; border: 1px solid #10b98155; color: #6ee7b7; }
.flash-error { background: #ef444422; border: 1px solid #ef444455; color: #fca5a5; }
.muted { color: var(--muted); }
.small { font-size: .8rem; }
nav.topbar { background: var(--panel); border-bottom: 1px solid var(--border); padding: 14px 0; }
nav.topbar .container { display: flex; align-items: center; justify-content: space-between; padding: 0 16px; }
nav.topbar .links a { color: var(--muted); margin-left: 18px; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: .88rem; }
th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; }
.badge { padding: 3px 9px; border-radius: 20px; font-size: .75rem; font-weight: 600; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 700px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }
.stat { background: var(--panel2); border-radius: 8px; padding: 16px; }
.stat .num { font-size: 1.6rem; font-weight: 700; }
.price-box { background: var(--panel2); border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin-top: 16px; text-align: center; }
.price-box .amount { font-size: 2rem; font-weight: 700; color: var(--accent2); }
.pay-instructions { background: var(--panel2); border: 1px dashed var(--border); border-radius: 8px; padding: 14px; margin-top: 12px; font-size: .88rem; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tabs a { padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border); color: var(--muted); }
.tabs a.active { background: var(--accent); color: #fff; border-color: var(--accent); }