:root {
  --admin-bg: #f6f8f7;
  --admin-card: #ffffff;
  --admin-text: #1f2d27;
  --admin-text-muted: #607268;
  --admin-border: #d8e0db;
  --admin-accent: #2563eb;
  --admin-accent-hover: #1d4ed8;
  --admin-danger: #dc2626;
  --admin-success: #047857;
}

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

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--admin-bg);
  color: var(--admin-text);
  line-height: 1.6;
}

.admin-header {
  background: #ffffff;
  border-bottom: 1px solid var(--admin-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.admin-header__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.admin-header__title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--admin-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.admin-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.admin-header__link {
  font-size: 0.85rem;
  color: var(--admin-text-muted);
  text-decoration: none;
}
.admin-header__link:hover { color: var(--admin-accent); }

.admin-main {
  max-width: 1080px;
  margin: 28px auto 80px;
  padding: 0 24px;
  display: grid;
  gap: 20px;
}

.admin-card {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}
.admin-card--login { max-width: 420px; margin: 60px auto; }
.admin-card__head h1, .admin-card__head h2 { margin: 0 0 6px; }
.admin-card__head { margin-bottom: 16px; }
.admin-muted { color: var(--admin-text-muted); font-size: 0.875rem; margin: 0 0 12px; }

.admin-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.admin-form--row {
  display: grid;
  grid-template-columns: 2fr 1fr auto;
  gap: 16px;
  align-items: end;
}
@media (max-width: 720px) {
  .admin-form--row { grid-template-columns: 1fr; }
}

.admin-field { display: flex; flex-direction: column; gap: 6px; }
.admin-label { font-size: 0.8125rem; font-weight: 600; color: var(--admin-text); }
.admin-hint { font-size: 0.75rem; color: var(--admin-text-muted); }

.admin-input {
  appearance: none;
  width: 100%;
  padding: 10px 12px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--admin-text);
  background: #ffffff;
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.admin-input:focus {
  outline: none;
  border-color: var(--admin-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.admin-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}
.admin-btn:focus-visible {
  outline: 2px solid var(--admin-accent);
  outline-offset: 2px;
}
.admin-btn--primary {
  background: var(--admin-accent);
  color: #ffffff;
  border-color: var(--admin-accent);
}
.admin-btn--primary:hover { background: var(--admin-accent-hover); border-color: var(--admin-accent-hover); }
.admin-btn--ghost {
  background: transparent;
  color: var(--admin-text);
  border-color: var(--admin-border);
}
.admin-btn--ghost:hover { background: rgba(0,0,0,0.04); }
.admin-btn--danger {
  background: #fff;
  color: var(--admin-danger);
  border-color: var(--admin-danger);
}
.admin-btn--danger:hover { background: var(--admin-danger); color: #fff; }
.admin-btn--small { padding: 6px 12px; font-size: 0.8125rem; }
.admin-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.admin-error {
  margin: 8px 0 0;
  padding: 10px 12px;
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.32);
  color: var(--admin-danger);
  border-radius: 8px;
  font-size: 0.8125rem;
}
.admin-success[hidden],
.admin-progress[hidden],
.admin-error[hidden],
.admin-save-msg[hidden] {
  display: none !important;
}

.admin-progress {
  margin-top: 12px;
  padding: 10px 12px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.25);
  color: var(--admin-accent);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
}

.admin-success {
  margin-top: 12px;
  padding: 14px 16px;
  background: rgba(4, 120, 87, 0.08);
  border: 1px solid rgba(4, 120, 87, 0.32);
  color: var(--admin-success);
  border-radius: 8px;
  font-size: 0.875rem;
}

.admin-success__head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.admin-success__edit {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px 16px;
  align-items: end;
  padding-top: 12px;
  border-top: 1px solid rgba(4, 120, 87, 0.2);
}

@media (max-width: 720px) {
  .admin-success__edit {
    grid-template-columns: 1fr;
  }
}

.admin-save-msg {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.8125rem;
}
.admin-save-msg--ok { color: var(--admin-success); }
.admin-save-msg--err { color: var(--admin-danger); }
.admin-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #ffffff;
  border: 1px solid var(--admin-border);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

.admin-table-wrap { overflow-x: auto; }
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.admin-table thead th {
  text-align: left;
  padding: 10px 12px;
  background: #f1f4f2;
  border-bottom: 1px solid var(--admin-border);
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--admin-text-muted);
  white-space: nowrap;
}
.admin-table tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--admin-border);
  vertical-align: middle;
}
.admin-table tbody tr:hover td { background: rgba(37, 99, 235, 0.04); }
.admin-empty { text-align: center; color: var(--admin-text-muted); padding: 24px 12px; }

.admin-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.admin-status--active { background: rgba(4, 120, 87, 0.14); color: var(--admin-success); }
.admin-status--revoked { background: rgba(107, 114, 128, 0.18); color: #4b5563; }
.admin-status--expired { background: rgba(180, 83, 9, 0.14); color: #b45309; }

.admin-code--cell {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  word-break: break-all;
}

.admin-input--cell {
  padding: 6px 8px;
  font-size: 0.8125rem;
  min-width: 120px;
}

.admin-table__actions {
  text-align: right;
  white-space: nowrap;
}

.admin-cell-view {
  display: inline-block;
  min-height: 1.5em;
  line-height: 1.5;
}

.admin-cell-edit {
  display: none;
}

.admin-actions-edit {
  display: none;
}

.admin-row--editing .admin-cell-view,
.admin-row--editing .admin-actions-view {
  display: none;
}

.admin-row--editing .admin-cell-edit,
.admin-row--editing .admin-actions-edit {
  display: block;
}

.admin-row--editing .admin-actions-edit {
  display: inline-flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}