/* Fuku-chan Admin — Peon Design System */
:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #eef2ff;
  --primary-dark: #3730a3;
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

  --success: #22c55e;
  --success-bg: #f0fdf4;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --info: #3b82f6;
  --info-bg: #eff6ff;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;

  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;

  --sidebar-bg: #0f172a;
  --sidebar-hover: #1e293b;
  --sidebar-active: rgba(99, 102, 241, 0.15);
  --sidebar-text: #94a3b8;
  --sidebar-text-active: #ffffff;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --t-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --t: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 9999px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }
* { scrollbar-width: thin; scrollbar-color: #cbd5e1 transparent; }

/* ─── Login screen ─── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  padding: 1rem;
}

.login-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 420px;
}

.login-logo {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 0.25rem;
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

/* ─── Layout ─── */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 1.5rem 1.25rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  border-bottom: 1px solid #1e293b;
}

.sidebar-brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1rem;
}

.sidebar-brand-text {
  color: white;
  font-weight: 700;
  font-size: 0.95rem;
}

.sidebar-brand-subtext {
  color: var(--sidebar-text);
  font-size: 0.7rem;
  margin-top: 0.1rem;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0.75rem;
}

.sidebar-group {
  margin-bottom: 1.25rem;
}

.sidebar-group-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0 0.75rem;
  margin-bottom: 0.4rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--t-fast);
  margin-bottom: 0.15rem;
}

.sidebar-link:hover {
  background: var(--sidebar-hover);
  color: white;
}

.sidebar-link.active {
  background: var(--sidebar-active);
  color: var(--sidebar-text-active);
}

.sidebar-link-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.sidebar-bottom {
  padding: 0.75rem;
  border-top: 1px solid #1e293b;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--t-fast);
}
.sidebar-user:hover { background: var(--sidebar-hover); }

.sidebar-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name {
  color: white;
  font-weight: 600;
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar-user-role {
  color: var(--text-muted);
  font-size: 0.7rem;
}

/* Main content */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  height: 60px;
  background: white;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page {
  padding: 1.5rem;
  flex: 1;
  animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.2rem;
}

/* ─── Cards ─── */
.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--t-fast);
}
.card:hover { box-shadow: var(--shadow-md); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ─── Stat cards ─── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: var(--t-fast);
  box-shadow: var(--shadow-sm);
}
.stat-card:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

.stat-card-label {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.stat-card-value {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.stat-card-change {
  font-size: 0.78rem;
  margin-top: 0.4rem;
  color: var(--text-muted);
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--t-fast);
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-secondary { background: white; color: var(--text-primary); border-color: var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--bg-tertiary); }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover:not(:disabled) { background: var(--bg-tertiary); color: var(--text-primary); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover:not(:disabled) { background: #dc2626; }
.btn-small { padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.btn-block { width: 100%; }

/* ─── Forms ─── */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: white;
  transition: var(--t-fast);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.form-textarea { min-height: 100px; resize: vertical; }
.form-help {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}
.form-error {
  color: var(--danger);
  font-size: 0.85rem;
  background: var(--danger-bg);
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--danger);
  margin-bottom: 1rem;
}

/* ─── Badges ─── */
.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success { background: #22c55e15; color: #16a34a; border: 1px solid #22c55e30; }
.badge-warning { background: #f59e0b15; color: #d97706; border: 1px solid #f59e0b30; }
.badge-danger { background: #ef444415; color: #dc2626; border: 1px solid #ef444430; }
.badge-info { background: #3b82f615; color: #2563eb; border: 1px solid #3b82f630; }
.badge-muted { background: #94a3b815; color: #475569; border: 1px solid #94a3b830; }
.badge-primary { background: #6366f115; color: #4f46e5; border: 1px solid #6366f130; }

/* ─── Table ─── */
.table-wrap {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

thead {
  background: var(--bg-tertiary);
}

th {
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
  color: var(--text-primary);
}

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

/* ─── Modal ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 50;
  animation: fadeIn 0.15s;
}

.modal {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: var(--t-fast);
}
.modal-close:hover { background: var(--bg-tertiary); color: var(--text-primary); }

.modal-body {
  padding: 1.5rem;
  flex: 1;
  overflow-y: auto;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* ─── Toast ─── */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.85rem 1.15rem;
  min-width: 280px;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-left: 4px solid var(--info);
  animation: slideIn 0.2s ease-out;
}

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

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

.toast-icon { font-size: 1.1rem; }
.toast-message { flex: 1; font-size: 0.875rem; color: var(--text-primary); }

/* ─── Empty state ─── */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.empty-state-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.empty-state-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* ─── Skeleton ─── */
.skeleton {
  background: linear-gradient(90deg, #f1f5f9 0%, #e2e8f0 50%, #f1f5f9 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ─── Master-Detail layout ─── */
.master-detail {
  display: flex;
  height: calc(100vh - 60px - 3rem);
  gap: 1.5rem;
}

.master-panel {
  width: 320px;
  min-width: 320px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.master-panel-header {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.master-panel-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

.master-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--t-fast);
  border: 1.5px solid transparent;
  margin-bottom: 0.25rem;
}

.master-item:hover { background: var(--bg-tertiary); }
.master-item.active {
  background: var(--primary-light);
  border-color: rgba(99, 102, 241, 0.3);
}

.master-item-info { flex: 1; min-width: 0; }
.master-item-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.master-item-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detail-panel {
  flex: 1;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow-y: auto;
  box-shadow: var(--shadow-sm);
}

/* ─── Tag chips (keywords/phrases) ─── */
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem 0.3rem 0.7rem;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
}

.chip-remove {
  background: transparent;
  border: none;
  color: var(--primary-dark);
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
  padding: 0;
  opacity: 0.6;
}
.chip-remove:hover { opacity: 1; }

/* ─── Switch ─── */
.switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 22px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.switch-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #cbd5e1;
  border-radius: 22px;
  transition: var(--t-fast);
}
.switch-slider:before {
  position: absolute;
  content: '';
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--t-fast);
}
.switch input:checked + .switch-slider { background: var(--primary); }
.switch input:checked + .switch-slider:before { transform: translateX(16px); }

/* ─── Sandbox chat ─── */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 60px - 3rem);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.chat-msg {
  margin-bottom: 0.75rem;
  display: flex;
}

.chat-msg.user { justify-content: flex-end; }
.chat-msg.bot { justify-content: flex-start; }

.chat-bubble {
  max-width: 70%;
  padding: 0.6rem 0.95rem;
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  line-height: 1.5;
}

.chat-msg.user .chat-bubble { background: var(--primary); color: white; }
.chat-msg.bot .chat-bubble { background: var(--bg-tertiary); color: var(--text-primary); }

.chat-input-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem;
  background: white;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ─── Mobile hamburger ─── */
.hamburger-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 1.1rem;
  align-items: center;
  justify-content: center;
}
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  z-index: 30;
}
.sidebar-backdrop.show { display: block; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -260px;
    top: 0;
    height: 100vh;
    z-index: 40;
    transition: left 250ms ease;
  }
  .sidebar.open { left: 0; }
  .hamburger-btn { display: inline-flex; }
  .page { padding: 1rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .master-detail { flex-direction: column; height: auto; }
  .master-panel { width: 100%; min-width: 0; }
  .topbar { padding: 0 1rem; }
  .modal { max-width: calc(100vw - 2rem); }
}

/* Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.78rem; }
.font-semibold { font-weight: 600; }
.hidden { display: none !important; }