:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e8eef7;
  --muted: #8b9cb3;
  --accent: #3d9eff;
  --accent-hover: #66b3ff;
  --danger: #f07178;
  --success: #7fd99a;
  --warning: #ffcc66;
  --radius: 12px;
  --font: "DM Sans", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1e3a5f 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.5;
}

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

a:hover {
  color: var(--accent-hover);
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand span {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-top: 1.25rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 1rem;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  max-width: 320px;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: none;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #0a0e14;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-danger {
  background: rgba(240, 113, 120, 0.2);
  color: var(--danger);
  border: 1px solid rgba(240, 113, 120, 0.4);
}

.btn-danger:hover {
  background: rgba(240, 113, 120, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--muted);
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tr:last-child td {
  border-bottom: none;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.qr-thumb {
  max-width: 120px;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.flash {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.flash-danger {
  background: rgba(240, 113, 120, 0.15);
  border: 1px solid rgba(240, 113, 120, 0.35);
  color: #ffb4b8;
}

.flash-success {
  background: rgba(127, 217, 154, 0.12);
  border: 1px solid rgba(127, 217, 154, 0.35);
  color: var(--success);
}

.flash-info {
  background: rgba(61, 158, 255, 0.12);
  border: 1px solid rgba(61, 158, 255, 0.3);
  color: var(--accent-hover);
}

.form-row {
  margin-bottom: 1rem;
}

.login-box {
  max-width: 380px;
  margin: 3rem auto;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}

.stat {
  padding: 1rem;
  background: var(--bg);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
}

@media (max-width: 640px) {
  table,
  thead,
  tbody,
  th,
  td,
  tr {
    display: block;
  }

  thead {
    display: none;
  }

  tr {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--bg);
    border-radius: 8px;
    border: 1px solid var(--border);
  }

  td {
    border: none;
    padding: 0.25rem 0;
  }

  td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
  }

  .actions {
    margin-top: 0.5rem;
  }
}