:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2a3544;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --accent: #2aabee;
  --accent-hover: #2298d6;
  --success: #31b545;
  --warn: #e8a317;
  --danger: #e53935;
  --radius: 12px;
}

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

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 96px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
}

nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
}
.nav-btn:hover, .nav-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.card h2 {
  font-size: 1.15rem;
  margin-bottom: 16px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .grid-2 { grid-template-columns: 1fr; }
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

input, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 14px;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  font-weight: 600;
}
.btn:hover { background: var(--accent-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: transparent; }

.support-box {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
  text-align: center;
}
.support-box .hint {
  margin-bottom: 12px;
}
.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px));
  background: rgba(15, 20, 25, 0.92);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.btn-support {
  background: #2aabee;
}
.btn-support:hover {
  background: #229ed9;
  text-decoration: none;
}
.btn-energy {
  background: #31b545;
}
.btn-energy:hover {
  background: #2a9c3c;
}
.btn-group {
  background: #8b5cf6;
}
.btn-group:hover {
  background: #7c4fe0;
}

.stat-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.stat {
  flex: 1;
  min-width: 140px;
  background: var(--bg);
  border-radius: 10px;
  padding: 16px;
  border: 1px solid var(--border);
}

.stat .label { font-size: 0.8rem; color: var(--muted); }
.stat .value { font-size: 1.5rem; font-weight: 700; margin-top: 4px; }

.packages {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}

.pkg {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.pkg:hover, .pkg.selected {
  border-color: var(--accent);
}
.pkg .price { font-size: 1.4rem; font-weight: 700; color: var(--accent); }
.pkg .name { font-weight: 600; margin: 8px 0 4px; }
.pkg .desc { font-size: 0.85rem; color: var(--muted); }

.pay-box {
  background: var(--bg);
  border: 1px dashed var(--accent);
  border-radius: 10px;
  padding: 20px;
  margin-top: 16px;
}

.pay-qr-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 16px 0 8px;
}

.pay-qrcode {
  background: #fff;
  padding: 12px;
  border-radius: 12px;
  line-height: 0;
}

.pay-qrcode img,
.pay-qrcode canvas {
  display: block;
  border-radius: 4px;
}

.pay-qr-hint {
  text-align: center;
  max-width: 280px;
  margin-top: 10px;
}

.pay-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.pay-success-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 12px 0 4px;
}

.pay-success-icon {
  display: block;
  filter: drop-shadow(0 8px 24px rgba(82, 196, 26, 0.25));
}

.pay-success-title {
  margin-top: 16px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--success);
}

.pay-success-amount {
  margin-top: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.pay-success-desc,
.pay-success-tx {
  max-width: 360px;
}

.pay-box.is-paid {
  border-style: solid;
  border-color: rgba(82, 196, 26, 0.45);
}

.pay-amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--warn);
  word-break: break-all;
}

.address {
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
  word-break: break-all;
  background: var(--card);
  padding: 12px;
  border-radius: 8px;
  margin: 10px 0;
  user-select: all;
}

.copy-input {
  width: 100%;
  box-sizing: border-box;
  border: none;
  outline: none;
  color: inherit;
  display: block;
}

.hint { font-size: 0.85rem; color: var(--muted); margin-top: 8px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 500; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-pending { background: #3d3520; color: var(--warn); }
.badge-approved { background: #1e3a28; color: var(--success); }
.badge-rejected { background: #3a2020; color: var(--danger); }
.badge-paid { background: #1e3a28; color: var(--success); }
.badge-expired { background: #3a2020; color: var(--danger); }
.badge-debit { background: #3a2020; color: #ff8a80; }
.badge-topup { background: #1e3a28; color: var(--success); }

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 12px 18px;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 100;
  display: none;
}
.toast.show { display: block; }

.hidden { display: none !important; }

.login-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.admin-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.admin-panel .card:last-child {
  margin-bottom: 0;
}

.table-wrap {
  overflow-x: auto;
  margin-bottom: 12px;
}

.table-wrap table {
  min-width: 640px;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 4px;
  font-size: 0.88rem;
  color: var(--muted);
}

.pagination-btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.pagination-btns .btn-outline {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.pagination-btns .btn-outline:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 12px;
}

.steps {
  counter-reset: step;
  list-style: none;
  margin: 12px 0;
}
.steps li {
  counter-increment: step;
  padding: 8px 0 8px 36px;
  position: relative;
  font-size: 0.9rem;
  color: var(--muted);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  width: 24px;
  height: 24px;
  background: var(--border);
  border-radius: 50%;
  text-align: center;
  line-height: 24px;
  font-size: 0.8rem;
  color: var(--text);
}