* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  min-height: 100vh;
}

/* NAV */
.top-nav {
  background: #1e293b;
  border-bottom: 1px solid #334155;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  height: 56px;
  gap: 1.5rem;
}
.top-nav .logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: #38bdf8;
  margin-right: 2rem;
}
.top-nav a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: all 0.2s;
}
.top-nav a:hover, .top-nav a.active {
  color: #f1f5f9;
  background: #334155;
}

/* LAYOUT */
.container {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: #f1f5f9;
}
h2 {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  color: #cbd5e1;
}

/* CARDS */
.card {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

/* GRID */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* FORMS */
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: #94a3b8;
  margin-bottom: 0.3rem;
}
input, select, textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 8px;
  color: #e2e8f0;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}
input:focus, select:focus, textarea:focus {
  border-color: #38bdf8;
}

/* BUTTONS */
.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; }
.btn-success { background: #059669; color: #fff; }
.btn-success:hover { background: #047857; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-warning { background: #d97706; color: #fff; }
.btn-warning:hover { background: #b45309; }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.btn-block { width: 100%; justify-content: center; }

/* TABLE */
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  text-align: left;
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid #334155;
  font-size: 0.85rem;
}
th {
  color: #94a3b8;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
tr:hover td {
  background: #1e293b;
}

/* BADGES */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-pending { background: #fbbf2433; color: #fbbf24; }
.badge-confirmed { background: #38bdf833; color: #38bdf8; }
.badge-approved { background: #34d39933; color: #34d399; }
.badge-rejected { background: #f8717133; color: #f87171; }
.badge-expired { background: #6b728033; color: #9ca3af; }
.badge-iban { background: #818cf833; color: #818cf8; }
.badge-crypto { background: #fb923c33; color: #fb923c; }

/* LOGIN */
.login-wrap {
  max-width: 400px;
  margin: 8rem auto;
}

/* ALERTS */
.alert {
  padding: 0.8rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.85rem;
}
.alert-success { background: #059669; color: #fff; }
.alert-error { background: #dc2626; color: #fff; }
.alert-info { background: #2563eb; color: #fff; }

/* API KEY BOX */
.key-box {
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 0.8rem;
  font-family: monospace;
  font-size: 0.85rem;
  word-break: break-all;
  margin-top: 0.3rem;
  color: #fbbf24;
}

/* PAYMENT PAGE */
.pay-container {
  max-width: 550px;
  margin: 3rem auto;
  padding: 0 1rem;
}
.pay-amount {
  font-size: 2.5rem;
  font-weight: 700;
  color: #38bdf8;
  text-align: center;
  margin: 1rem 0;
}
.pay-currency {
  font-size: 1rem;
  color: #94a3b8;
}
.method-card {
  background: #0f172a;
  border: 2px solid #334155;
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 0.8rem;
  cursor: pointer;
  transition: border-color 0.2s;
}
.method-card:hover, .method-card.selected {
  border-color: #38bdf8;
}
.method-card .method-label {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}
.method-card .method-detail {
  font-size: 0.85rem;
  color: #94a3b8;
  font-family: monospace;
}

/* TABS */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.tab {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  background: #1e293b;
  border: 1px solid #334155;
  color: #94a3b8;
  transition: all 0.2s;
}
.tab:hover, .tab.active {
  background: #334155;
  color: #f1f5f9;
  border-color: #475569;
}

.hidden { display: none !important; }

.actions { display: flex; gap: 0.4rem; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
}