/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--font-ui);
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease, transform 80ms ease, box-shadow 120ms ease;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-primary:active { background: var(--accent-active); border-color: var(--accent-active); }

.btn-secondary {
  background: var(--bg-surface-2);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover { background: var(--bg-surface-3); border-color: var(--border-strong); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover { background: var(--bg-surface); color: var(--text-primary); }

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: var(--danger);
}
.btn-danger:hover { background: var(--danger); color: var(--text-inverse); }

.btn-sm {
  padding: 4px 10px;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 10px 20px;
  font-size: 0.9375rem;
  border-radius: var(--radius-lg);
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-md);
}
.btn-icon.btn-sm {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
}

/* ── Form controls ──────────────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  padding: 8px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  line-height: 1.5;
  transition: border-color 150ms ease, box-shadow 150ms ease;
  width: 100%;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}

.form-input-error {
  border-color: var(--danger);
}
.form-error-text {
  font-size: 0.75rem;
  color: var(--danger);
}

/* ── Checkbox / Toggle ──────────────────────────────────────────────────────── */
.toggle {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--border-strong);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background 150ms ease;
}
.toggle input:checked + .toggle-track { background: var(--accent); }
.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: white;
  border-radius: var(--radius-full);
  transition: transform 150ms ease;
  pointer-events: none;
}
.toggle input:checked ~ .toggle-thumb { transform: translateX(16px); }

/* ── Badge ──────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}
.badge-accent  { background: var(--accent-soft); color: var(--accent); }
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-danger  { background: var(--danger-soft); color: var(--danger); }
.badge-info    { background: var(--info-soft); color: var(--info); }
.badge-neutral { background: var(--bg-surface-2); color: var(--text-secondary); }

/* ── Card ───────────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 8px;
}
.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ── Toast ──────────────────────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 40px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 9000;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 280px;
  max-width: 380px;
  pointer-events: auto;
  position: relative;
  overflow: hidden;
  animation: toast-in 200ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.toast.removing {
  animation: toast-out 180ms ease forwards;
}

.toast-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 1px;
}

.toast-body { flex: 1; min-width: 0; }
.toast-title { font-size: 0.8125rem; font-weight: 600; color: var(--text-primary); }
.toast-message { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }

.toast-action {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  background: none;
  border: none;
  padding: 0;
}

.toast-close {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: none;
  background: none;
}
.toast-close:hover { color: var(--text-primary); background: var(--bg-surface-3); }

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  transition: width linear;
}

.toast-success { border-left: 3px solid var(--success); }
.toast-success .toast-icon { color: var(--success); }
.toast-success .toast-progress { background: var(--success); }

.toast-error { border-left: 3px solid var(--danger); }
.toast-error .toast-icon { color: var(--danger); }
.toast-error .toast-progress { background: var(--danger); }

.toast-warning { border-left: 3px solid var(--warning); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-warning .toast-progress { background: var(--warning); }

.toast-info { border-left: 3px solid var(--info); }
.toast-info .toast-icon { color: var(--info); }
.toast-info .toast-progress { background: var(--info); }

/* ── Modal ──────────────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fade-in 180ms ease;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 480px;
  max-height: 90dvh;
  display: flex;
  flex-direction: column;
  animation: modal-in 200ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
  flex-shrink: 0;
}

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

.modal-body {
  padding: 16px 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 0 24px 20px;
  flex-shrink: 0;
}

/* ── Dropdown / Context menu ────────────────────────────────────────────────── */
.dropdown {
  position: absolute;
  min-width: 180px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 4px;
  z-index: 500;
  animation: dropdown-in 140ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 80ms ease;
}
.dropdown-item:hover { background: var(--bg-surface-3); }
.dropdown-item.danger { color: var(--danger); }
.dropdown-item.danger:hover { background: var(--danger-soft); }

.dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.dropdown-label {
  padding: 4px 10px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}

/* ── Skeleton loader ────────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--bg-surface) 25%, var(--bg-surface-2) 50%, var(--bg-surface) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}

/* ── Divider ────────────────────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

/* ── Empty state ────────────────────────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 48px 24px;
  color: var(--text-tertiary);
  text-align: center;
}
.empty-state-icon { width: 48px; height: 48px; opacity: 0.5; }
.empty-state-title { font-size: 1rem; font-weight: 600; color: var(--text-secondary); }
.empty-state-desc { font-size: 0.8125rem; max-width: 280px; }

/* ── Tooltip ────────────────────────────────────────────────────────────────── */
[data-tooltip] {
  position: relative;
}
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-surface-3);
  color: var(--text-primary);
  font-size: 0.6875rem;
  white-space: nowrap;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease;
  z-index: 1000;
}
[data-tooltip]:hover::after { opacity: 1; }

/* ── Offline banner ─────────────────────────────────────────────────────────── */
#offline-banner {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 8px 16px;
  background: var(--warning-soft);
  color: var(--warning);
  border-bottom: 1px solid var(--warning);
  font-size: 0.8125rem;
  text-align: center;
  z-index: 9999;
}
#offline-banner.visible { display: block; }

/* ── Search input ───────────────────────────────────────────────────────────── */
.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input-wrap .search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-tertiary);
  width: 14px;
  height: 14px;
  pointer-events: none;
}
.search-input {
  width: 100%;
  padding: 6px 12px 6px 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8125rem;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}
.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.search-input::placeholder { color: var(--text-tertiary); }

/* ── Theme picker ───────────────────────────────────────────────────────────── */
.theme-picker-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  padding: 12px;
}
.theme-swatch {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  position: relative;
  transition: transform 120ms ease, border-color 120ms ease;
  overflow: hidden;
}
.theme-swatch:hover { transform: scale(1.08); }
.theme-swatch.active { border-color: var(--accent); }
.theme-swatch-check {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  color: white;
}
.theme-swatch.active .theme-swatch-check { opacity: 1; }