/* ═══════════════════════════════════════════════════════════
   Settings Panel — Modal overlay for configuration
   ═══════════════════════════════════════════════════════════ */

/* ── Settings Overlay ── */
.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.54);
  backdrop-filter: blur(10px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.settings-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ── Settings Panel ── */
.settings-panel {
  background: color-mix(in srgb, var(--color-surface-solid) 88%, transparent);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  width: 90%;
  max-width: 620px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(10px);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-soft);
  backdrop-filter: var(--blur-panel);
}

.settings-overlay.open .settings-panel {
  transform: translateY(0);
}

/* ── Panel Header ── */
.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.settings-header h2 {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
}

.settings-close {
  background: color-mix(in srgb, var(--color-surface-raised) 70%, transparent);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-xl);
  transition: color var(--transition-fast);
}

.settings-close:hover {
  color: var(--color-text);
}

/* ── Panel Body ── */
.settings-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* ── Setting Group ── */
.setting-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.setting-group label {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.setting-group .setting-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-dim);
}

/* ── Toggle Switch ── */
.toggle {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
}

.toggle input {
  display: none;
}

.toggle-track {
  width: 42px;
  height: 24px;
  background: var(--color-border);
  border-radius: var(--radius-xl);
  position: relative;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.toggle input:checked + .toggle-track {
  background: var(--color-accent);
}

.toggle-thumb {
  width: 18px;
  height: 18px;
  background: var(--color-text);
  border-radius: 50%;
  position: absolute;
  top: 3px;
  left: 3px;
  transition: transform var(--transition-fast);
}

.toggle input:checked + .toggle-track .toggle-thumb {
  transform: translateX(18px);
}

.toggle-label {
  font-size: var(--font-size-base);
  color: var(--color-text);
}

/* ── Theme Grid ── */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.theme-option {
  background: color-mix(in srgb, var(--color-surface-raised) 74%, transparent);
  border: 2px solid var(--color-border);
  border-radius: 18px;
  padding: var(--space-md);
  cursor: pointer;
  text-align: center;
  transition: border-color var(--transition-fast);
}

.theme-option:hover {
  border-color: var(--color-accent);
}

.theme-option.active {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
}

.theme-preview {
  width: 100%;
  height: 46px;
  border-radius: 14px;
  margin-bottom: var(--space-sm);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 7px;
}

.theme-preview span {
  width: 24px;
  height: 10px;
  border-radius: var(--radius-xl);
  display: block;
}

.theme-name {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  background: color-mix(in srgb, var(--color-surface-raised) 58%, transparent);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 9px 10px;
}

.color-row span {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.color-row input[type="color"] {
  width: 38px;
  height: 26px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

/* ── Add Instance Form ── */
.form-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

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

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
}

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

.form-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
  padding-top: var(--space-md);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.btn-secondary:hover {
  background: var(--color-surface-raised);
}

@media (max-width: 560px) {
  .settings-panel {
    width: calc(100vw - 18px);
    max-height: calc(100dvh - 18px);
  }

  .theme-grid,
  .color-grid {
    grid-template-columns: 1fr;
  }
}