:root {
  --bg: #f2efe8;
  --panel: rgba(255, 252, 247, 0.92);
  --ink: #1f2430;
  --muted: #6d7484;
  --line: rgba(31, 36, 48, 0.12);
  --accent: #d96b2b;
  --accent-dark: #8f3e12;
  --success: #0c7a50;
  --error: #b53b2f;
  --shadow: 0 18px 40px rgba(44, 37, 24, 0.08);
  --radius: 20px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
}

html {
  -webkit-text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Georgia", "Noto Serif TC", serif;
  background:
    radial-gradient(circle at top left, rgba(217, 107, 43, 0.18), transparent 28%),
    linear-gradient(135deg, #f5f1e8, #ebe6dc 45%, #f7f4ed);
  min-height: 100vh;
  min-height: 100dvh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

a,
button {
  touch-action: manipulation;
}

.shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
  min-height: 100dvh;
}

.sidebar {
  padding: calc(28px + var(--safe-top)) calc(28px + var(--safe-right)) calc(28px + var(--safe-bottom)) calc(28px + var(--safe-left));
  color: #fff7ef;
  background:
    linear-gradient(180deg, rgba(26, 23, 19, 0.96), rgba(60, 44, 27, 0.94)),
    linear-gradient(120deg, #201a15, #5b351a);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.brand {
  margin: 8px 0 0;
  font-size: 2rem;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--muted);
}

.sidebar .eyebrow,
.sidebar .subtle {
  color: rgba(255, 247, 239, 0.68);
}

.subtle {
  color: var(--muted);
}

.nav {
  display: grid;
  gap: 10px;
  margin: 28px 0;
}

.nav a,
.ghost,
button {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 12px 16px;
  transition: 160ms ease;
}

.nav a:hover,
.ghost:hover {
  background: rgba(255, 247, 239, 0.08);
  border-color: rgba(255, 247, 239, 0.12);
}

.ghost {
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.main {
  padding: calc(28px + var(--safe-top)) calc(28px + var(--safe-right)) calc(28px + var(--safe-bottom)) calc(28px + var(--safe-left));
}

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 20px;
}

.page-head h2 {
  margin: 6px 0 0;
  font-size: 2rem;
}

.stats-grid,
.grid-2,
.two-col {
  display: grid;
  gap: 18px;
}

.stats-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-bottom: 18px;
}

.grid-2,
.two-col {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.stat-card,
.panel,
.flash,
.login-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.stat-card {
  padding: 18px;
}

.stat-card span {
  display: block;
  color: var(--muted);
}

.stat-card strong {
  display: block;
  margin-top: 10px;
  font-size: 2rem;
}

.panel {
  padding: 18px;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-wrap::-webkit-scrollbar {
  height: 10px;
}

.table-wrap::-webkit-scrollbar-thumb {
  background: rgba(31, 36, 48, 0.18);
  border-radius: 999px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.panel h3 {
  margin: 0;
}

.form-grid,
.filter-grid {
  display: grid;
  gap: 14px;
}

.form-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.form-grid .full {
  grid-column: 1 / -1;
}

.form-grid label,
.checkbox {
  display: grid;
  gap: 8px;
}

.checkbox {
  align-items: center;
  grid-auto-flow: column;
  justify-content: start;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 16px;
}

button {
  background: linear-gradient(135deg, var(--accent), #ef9f4e);
  color: #fff;
  cursor: pointer;
}

button:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
}

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

th,
td {
  text-align: left;
  padding: 12px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
}

.mono,
.secret-box {
  font-family: "Courier New", monospace;
}

.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.inline-actions button {
  padding: 8px 12px;
  font-size: 0.88rem;
}

.flash-stack {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.flash {
  padding: 14px 18px;
}

.flash.success {
  border-color: rgba(12, 122, 80, 0.2);
  color: var(--success);
}

.flash.error {
  border-color: rgba(181, 59, 47, 0.2);
  color: var(--error);
}

.secret-box {
  margin-top: 10px;
  padding: 12px;
  border-radius: 12px;
  background: rgba(31, 36, 48, 0.06);
  overflow-x: auto;
}

.login-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: calc(24px + var(--safe-top)) calc(24px + var(--safe-right)) calc(24px + var(--safe-bottom)) calc(24px + var(--safe-left));
}

.login-panel {
  width: min(480px, 100%);
  padding: 32px;
}

.sidebar-footer {
  display: grid;
  gap: 10px;
}

@media (max-width: 900px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    gap: 18px;
  }

  .nav {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .page-head,
  .panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

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

@media (max-width: 640px) {
  .sidebar,
  .main {
    padding: calc(18px + var(--safe-top)) calc(16px + var(--safe-right)) calc(24px + var(--safe-bottom)) calc(16px + var(--safe-left));
  }

  .brand,
  .page-head h2 {
    font-size: 1.6rem;
  }

  .stat-card strong {
    font-size: 1.65rem;
  }

  .login-panel,
  .panel,
  .stat-card,
  .flash {
    border-radius: 18px;
  }

  .login-panel {
    padding: 24px 20px;
  }

  .inline-actions button,
  .form-grid > button {
    width: 100%;
  }
}

/* Status Badges */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-unused {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}
.badge-used {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}
.badge-expired {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffeeba;
}
.badge-frozen {
  background: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}
.badge-invalid {
  background: #e2e3e5;
  color: #383d41;
  border: 1px solid #d6d8db;
}