/* ── Settings overlay ───────────────────────────────────────────────────────── */

.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 2100;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.settings-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* Modal shell — sidebar + content side by side */
.settings-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: min(680px, 96vw);
  height: min(460px, 90vh);
  position: relative;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  display: flex;
  overflow: hidden;
}

/* Close button */
.settings-close {
  position: absolute;
  top: 12px;
  right: 14px;
  z-index: 10;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  transition: color 0.2s;
}

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

/* ── Left sidebar ── */

.settings-sidebar {
  width: 140px;
  flex-shrink: 0;
  background: var(--bg);
  border-right: 1px solid var(--border);
  padding: 48px 8px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.settings-nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: none;
  border-radius: 9px;
  background: none;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.88rem;
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: background 0.15s, color 0.15s;
}

.settings-nav-item:hover {
  background: var(--surface);
  color: var(--text);
}

.settings-nav-item.active {
  background: rgba(139, 92, 246, 0.14);
  color: var(--accent2);
}

.settings-nav-icon {
  font-size: 1rem;
  line-height: 1;
  flex-shrink: 0;
}

/* ── Right content area ── */

.settings-content {
  flex: 1;
  overflow-y: auto;
  padding: 32px 28px 24px;
  scrollbar-width: thin;
}

.settings-panel {
  display: none;
}

.settings-panel.active {
  display: block;
}

.settings-panel-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 24px;
  letter-spacing: 0.03em;
}

/* ── General panel — language row ── */

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.settings-row-label {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 500;
}

.settings-row-desc {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 3px;
}

.settings-lang-row {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.settings-lang-btn {
  padding: 6px 16px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}

.settings-lang-btn:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}

.settings-lang-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(139, 92, 246, 0.12);
}

/* ── Data panel ── */

.settings-data-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.settings-data-label {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 500;
}

.settings-data-desc {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 3px;
}

.settings-data-btn {
  flex-shrink: 0;
  padding: 7px 18px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}

.settings-data-btn:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}

.settings-data-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.settings-data-btn--danger {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.35);
}

.settings-data-btn--danger:hover {
  background: rgba(248, 113, 113, 0.1);
  border-color: #f87171;
  color: #f87171;
}

.settings-data-msg {
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--muted);
  min-height: 1.2em;
}

.settings-data-msg.ok  { color: #86efac; }
.settings-data-msg.err { color: #f87171; }

/* ── About panel ── */

.settings-about-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 4px;
}

.settings-about-logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent2);
  letter-spacing: 0.04em;
}

.settings-about-en {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.settings-about-tagline {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.settings-about-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.settings-about-feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.55;
}

.settings-about-feature-icon {
  flex-shrink: 0;
  font-size: 1rem;
  margin-top: 1px;
}

.settings-about-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.settings-about-link {
  font-size: 0.85rem;
  color: var(--accent2);
  text-decoration: none;
  transition: color 0.18s;
}

.settings-about-link:hover { color: var(--accent); }

.settings-about-dot {
  color: var(--border);
}

/* ── Responsive: stack on narrow screens ── */
@media (max-width: 520px) {
  .settings-modal {
    flex-direction: column;
    height: min(600px, 95vh);
  }

  .settings-sidebar {
    width: 100%;
    flex-direction: row;
    padding: 44px 12px 10px;
    border-right: none;
    border-bottom: 1px solid var(--border);
    gap: 4px;
    overflow-x: auto;
  }

  .settings-nav-item {
    flex-direction: column;
    gap: 4px;
    padding: 8px 12px;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .settings-content {
    padding: 20px 18px 16px;
  }

  .settings-data-card,
  .settings-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}