/* Săn khách VIP - Lankv Studio */
:root {
  --bg: #0f1419;
  --bg2: #1a2332;
  --bg3: #243044;
  --card: #1e2a3a;
  --border: #2d3f56;
  --text: #e8eef6;
  --muted: #8fa3b8;
  --accent: #2dd4a8;
  --accent2: #1aad88;
  --warn: #f5a623;
  --danger: #e85d5d;
  --info: #4da3ff;
  --radius: 12px;
  --font: 'Be Vietnam Pro', system-ui, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -20%, rgba(45, 212, 168, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(77, 163, 255, 0.08), transparent);
}

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

.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header {
  background: rgba(26, 35, 50, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 12px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.brand-sub { font-size: 0.75rem; color: var(--muted); }
.nav { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.nav a, .nav span {
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text);
  text-decoration: none;
}
.nav a:hover { background: var(--bg3); }
.nav a.active { background: var(--accent); color: #0a1620; font-weight: 600; }
.balance-pill {
  background: rgba(45, 212, 168, 0.15);
  color: var(--accent);
  font-weight: 600;
  border: 1px solid rgba(45, 212, 168, 0.3);
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card h2, .card h3 {
  margin-bottom: 12px;
  font-size: 1.1rem;
}
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
}

/* Forms */
label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}
.form-group { margin-bottom: 14px; }
input[type="text"],
input[type="password"],
input[type="number"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 212, 168, 0.15);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  border: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: 0.15s;
}
.btn-primary { background: var(--accent); color: #0a1620; }
.btn-primary:hover { background: var(--accent2); text-decoration: none; }
.btn-secondary { background: var(--bg3); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warn { background: var(--warn); color: #1a1200; }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }
.btn-block { width: 100%; }

/* Auth */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.auth-box {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
}
.auth-box .logo {
  text-align: center;
  margin-bottom: 24px;
}
.auth-box .logo h1 {
  color: var(--accent);
  font-size: 1.6rem;
}
.auth-box .logo p { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }

/* Alert */
.alert {
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.alert-success { background: rgba(45,212,168,0.15); color: var(--accent); border: 1px solid rgba(45,212,168,0.3); }
.alert-error { background: rgba(232,93,93,0.15); color: var(--danger); border: 1px solid rgba(232,93,93,0.3); }
.alert-info { background: rgba(77,163,255,0.12); color: var(--info); border: 1px solid rgba(77,163,255,0.25); }

/* Table */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
tr:hover td { background: rgba(255,255,255,0.02); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-ok { background: rgba(45,212,168,0.2); color: var(--accent); }
.badge-pending { background: rgba(245,166,35,0.2); color: var(--warn); }
.badge-fail { background: rgba(232,93,93,0.2); color: var(--danger); }
.badge-off { background: rgba(143,163,184,0.2); color: var(--muted); }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.stat .label { font-size: 0.8rem; color: var(--muted); }
.stat .value { font-size: 1.4rem; font-weight: 700; margin-top: 4px; color: var(--accent); }

/* QR */
.qr-box {
  text-align: center;
  padding: 16px;
}
.qr-box img {
  max-width: 260px;
  width: 100%;
  border-radius: 12px;
  background: #fff;
  padding: 8px;
}
.qr-info {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}
.qr-info strong { color: var(--text); }

/* Footer */
.site-footer {
  text-align: center;
  padding: 28px 16px;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}
.site-footer strong { color: var(--accent); }

.page { padding: 24px 0 40px; }
.page-title { font-size: 1.4rem; margin-bottom: 20px; }
.muted { color: var(--muted); }
.text-right { text-align: right; }
.mt-2 { margin-top: 8px; }
.mb-2 { margin-bottom: 8px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.post-content {
  max-width: 360px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.85rem;
}
.empty { text-align: center; padding: 40px; color: var(--muted); }