/* ===========================
   Cards
   =========================== */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title svg {
  color: var(--accent);
}

/* ===========================
   Stats Grid
   =========================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}

.stat-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* data-tab-to 属性を持つカードはリンクとして機能するため、クリック可能であることを示す */
.stat-card[data-tab-to] {
  cursor: pointer;
}

.stat-card[data-tab-to]:hover {
  border-color: var(--accent);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.stat-card.accent::before { background: var(--accent); }
.stat-card.green::before  { background: var(--green); }
.stat-card.red::before    { background: var(--red); }
.stat-card.gold::before   { background: var(--gold); }

.stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.02em;
  line-height: 1;
}

.stat-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.stat-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0.08;
  font-size: 3rem;
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.15s, transform 0.1s, opacity 0.15s;
  white-space: nowrap;
  text-decoration: none;
}

.btn:active { transform: scale(0.97); }

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  text-decoration: none;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  text-decoration: none;
}

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

.btn-danger:hover {
  background: #c03537;
  color: #fff;
  text-decoration: none;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: 10px;
}

/* ===========================
   Table
   =========================== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

thead th {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 10px 16px;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

thead th:first-child { border-radius: var(--radius) 0 0 0; }
thead th:last-child  { border-radius: 0 var(--radius) 0 0; }

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

tbody tr:hover   { background: var(--bg-hover); }
tbody tr:last-child { border-bottom: none; }

tbody td {
  padding: 12px 16px;
  color: var(--text-primary);
  vertical-align: middle;
}

.td-mono {
  font-family: var(--mono);
  font-size: 0.85rem;
}

/* ===========================
   Status Dot
   =========================== */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}

.status-dot.offline {
  background: var(--text-muted);
}

/* ===========================
   Badges / Tags
   =========================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-green  { background: var(--green-light);  color: var(--green); }
.badge-red    { background: var(--red-light);    color: var(--red); }
.badge-blue   { background: var(--accent-light); color: var(--accent); }
.badge-yellow { background: var(--yellow-light); color: var(--yellow); }

/* ===========================
   Filter / Search Bar
   =========================== */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 8px 12px;
  flex: 1;
  min-width: 200px;
  transition: border-color 0.15s;
}

.search-box:focus-within {
  border-color: var(--accent);
}

.search-box input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  flex: 1;
  font-family: var(--font);
}

.search-box input::placeholder { color: var(--text-muted); }

.search-box svg { color: var(--text-muted); flex-shrink: 0; }

select.filter-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 8px 12px;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: var(--font);
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s;
}

select.filter-select:focus {
  border-color: var(--accent);
}

select.filter-select option {
  background: var(--bg-tertiary);
}

/* ===========================
   Pagination
   =========================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 24px;
}

.page-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.page-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.page-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.page-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ===========================
   Empty State
   =========================== */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* ===========================
   Toast Notifications
   =========================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-primary);
  box-shadow: var(--shadow);
  pointer-events: all;
  animation: toastIn 0.25s ease;
  min-width: 260px;
  max-width: 360px;
}

.toast.success { border-left: 3px solid var(--green); }
.toast.error   { border-left: 3px solid var(--red); }
.toast.info    { border-left: 3px solid var(--accent); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ===========================
   Loading / Spinner
   =========================== */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-hover) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius);
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}