:root {
  --admin-bg: #f4f7fb;
  --admin-surface: #ffffff;
  --admin-surface-soft: #f8fbff;
  --admin-text: #1f2a37;
  --admin-muted: #6b7280;
  --admin-line: #dbe4ef;
  --admin-primary: #1e5eff;
  --admin-primary-dark: #1749c6;
  --admin-danger: #dc2626;
  --admin-success: #16a34a;
  --admin-warning: #d97706;
  --admin-radius: 18px;
  --admin-shadow: 0 14px 40px rgba(15, 23, 42, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body.admin-body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--admin-text);
  background: var(--admin-bg);
  line-height: 1.7;
}

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

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

.admin-shell {
  min-height: 100vh;
  display: flex;
}

.admin-shell--single {
  display: block;
}

.admin-sidebar {
  width: 280px;
  background: linear-gradient(180deg, #0f172a 0%, #16213f 100%);
  color: #fff;
  flex: 0 0 280px;
}

.admin-sidebar__inner {
  min-height: 100vh;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
}

.admin-brand {
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 22px;
}

.admin-brand__eyebrow {
  font-size: 12px;
  letter-spacing: 0.14em;
  opacity: 0.7;
}

.admin-brand__title {
  margin-top: 8px;
  font-size: 24px;
  font-weight: 800;
  line-height: 1.35;
}

.admin-nav {
  display: grid;
  gap: 10px;
}

.admin-nav__link {
  display: block;
  padding: 13px 14px;
  border-radius: 14px;
  color: rgba(255, 255, 255, 0.86);
  transition:
    background 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.admin-nav__link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  transform: translateX(2px);
}

.admin-nav__link.is-active {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-weight: 700;
}

.admin-sidebar__footer {
  margin-top: auto;
  padding-top: 20px;
}

.admin-main {
  flex: 1 1 auto;
  min-width: 0;
  padding: 28px;
}

.admin-main--single {
  width: 100%;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.admin-page-header {
  margin-bottom: 20px;
}

.admin-page-title {
  margin: 0;
  font-size: 30px;
  line-height: 1.3;
  font-weight: 800;
}

.admin-card {
  background: var(--admin-surface);
  border: 1px solid var(--admin-line);
  border-radius: var(--admin-radius);
  box-shadow: var(--admin-shadow);
  padding: 24px;
}

.admin-card + .admin-card {
  margin-top: 20px;
}

.admin-grid {
  display: grid;
  gap: 20px;
}

.admin-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.admin-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.admin-label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--admin-text);
}

.admin-input,
.admin-select,
.admin-textarea {
  width: 100%;
  border: 1px solid var(--admin-line);
  border-radius: 14px;
  padding: 13px 14px;
  background: #fff;
  color: var(--admin-text);
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.admin-input:focus,
.admin-select:focus,
.admin-textarea:focus {
  outline: none;
  border-color: rgba(30, 94, 255, 0.5);
  box-shadow: 0 0 0 4px rgba(30, 94, 255, 0.12);
}

.admin-textarea {
  min-height: 140px;
  resize: vertical;
}

.admin-field + .admin-field {
  margin-top: 16px;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.admin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    opacity 0.2s ease,
    background 0.2s ease;
}

.admin-btn:hover {
  transform: translateY(-1px);
}

.admin-btn--primary {
  background: var(--admin-primary);
  color: #fff;
}

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

.admin-btn--ghost {
  background: #fff;
  border-color: var(--admin-line);
  color: var(--admin-text);
}

.admin-btn--danger {
  background: var(--admin-danger);
  color: #fff;
}

.admin-btn--full {
  width: 100%;
}

.admin-alert {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 16px;
  margin-bottom: 18px;
  border: 1px solid transparent;
}

.admin-alert--info {
  background: #eff6ff;
  border-color: #bfdbfe;
}

.admin-alert--success {
  background: #ecfdf5;
  border-color: #a7f3d0;
}

.admin-alert--error {
  background: #fef2f2;
  border-color: #fecaca;
}

.admin-alert__text {
  flex: 1 1 auto;
}

.admin-alert__close {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 0;
}

.admin-table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--admin-line);
  text-align: left;
  vertical-align: top;
}

.admin-table th {
  font-size: 14px;
  color: var(--admin-muted);
  font-weight: 700;
}

.admin-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.admin-badge--open {
  background: #dcfce7;
  color: #166534;
}

.admin-badge--partial {
  background: #fef3c7;
  color: #92400e;
}

.admin-badge--preparing {
  background: #e0e7ff;
  color: #3730a3;
}

.admin-badge--suspended,
.admin-badge--closed {
  background: #fee2e2;
  color: #991b1b;
}

.admin-login-card {
  width: min(100%, 460px);
  background: var(--admin-surface);
  border: 1px solid var(--admin-line);
  border-radius: 24px;
  box-shadow: var(--admin-shadow);
  padding: 32px 26px;
}

.admin-login-card__eyebrow {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--admin-muted);
}

.admin-login-card__title {
  margin: 8px 0 0;
  font-size: 32px;
  line-height: 1.25;
  font-weight: 800;
}

.admin-login-card__lead {
  margin: 12px 0 0;
  color: var(--admin-muted);
}

.admin-help {
  margin-top: 8px;
  font-size: 13px;
  color: var(--admin-muted);
}

.admin-kv {
  display: grid;
  gap: 6px;
}

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

.admin-kv__value {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.4;
}

@media (max-width: 980px) {
  .admin-shell {
    display: block;
  }

  .admin-sidebar {
    width: 100%;
    flex: none;
  }

  .admin-sidebar__inner {
    min-height: auto;
  }

  .admin-main {
    padding: 20px;
  }

  .admin-grid--2,
  .admin-grid--3 {
    grid-template-columns: 1fr;
  }
}