:root {
  color-scheme: light;
  --bg: #dfe7f1;
  --surface: #ffffff;
  --surface-low: #f2f3fd;
  --surface-line: #e1e2ec;
  --text: #191b23;
  --muted: #5d656e;
  --primary: #3b82f6;
  --primary-deep: #0058be;
  --success: #137333;
  --danger: #ba1a1a;
  --shadow: 0 10px 30px rgba(59, 130, 246, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 248px;
  background: rgba(255, 255, 255, 0.86);
  border-right: 1px solid rgba(194, 198, 214, 0.8);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
}

.brand small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav-item,
.ghost,
.secondary,
.primary {
  min-height: 42px;
  border-radius: 10px;
  padding: 0 14px;
}

.nav-item {
  background: transparent;
  text-align: left;
  color: var(--muted);
}

.nav-item.active {
  background: #d8e2ff;
  color: var(--primary-deep);
  font-weight: 700;
}

.ghost {
  margin-top: auto;
  background: transparent;
  color: var(--muted);
}

.main {
  margin-left: 248px;
  padding: 28px;
}

.login-panel {
  min-height: calc(100vh - 56px);
  display: grid;
  place-items: center;
}

.login-card {
  width: min(440px, 100%);
  background: var(--surface);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 28px;
  display: grid;
  gap: 16px;
}

.login-card h1,
.topbar h1,
.panel h2 {
  margin: 0;
}

.login-card p,
.topbar p {
  margin: 0;
  color: var(--muted);
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--surface-low);
  color: var(--text);
  padding: 12px 14px;
  outline: none;
}

textarea {
  resize: vertical;
  line-height: 1.6;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}

.primary {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
}

.secondary {
  background: #fff;
  color: var(--primary-deep);
  border: 1px solid var(--surface-line);
  font-weight: 700;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 24px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.metric,
.panel {
  background: var(--surface);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.metric {
  padding: 18px;
  display: grid;
  gap: 8px;
}

.metric span {
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  font-size: 30px;
}

.panel {
  padding: 20px;
  margin-bottom: 18px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.hint {
  color: var(--muted);
  font-size: 13px;
}

.filters {
  display: flex;
  gap: 10px;
  align-items: center;
}

.filters input,
.filters select {
  min-width: 160px;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  border-bottom: 1px solid var(--surface-line);
  padding: 12px 10px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

th {
  color: var(--muted);
  font-size: 12px;
}

.badge,
.status {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 999px;
  padding: 0 10px;
  background: #d8e2ff;
  color: var(--primary-deep);
  font-size: 12px;
  font-weight: 700;
}

.status.issued {
  background: #e6f4ea;
  color: var(--success);
}

.status.void {
  background: #ffdad6;
  color: var(--danger);
}

.card-key {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  word-break: break-all;
}

.danger {
  color: var(--danger);
  background: #ffdad6;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: #191b23;
  color: #fff;
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: auto;
  }

  .main {
    margin-left: 0;
    padding: 18px;
  }

  .metric-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .topbar,
  .panel-head {
    align-items: stretch;
    flex-direction: column;
  }
}