.settings-modal {
      position: fixed;
      inset: 0;
      z-index: 110;
      display: none;
      align-items: center;
      justify-content: center;
      padding: 20px;
      background: rgba(35, 32, 27, .24);
      backdrop-filter: blur(10px);
    }

    .settings-modal.open {
      display: flex;
    }

    .settings-dialog {
      width: min(640px, 100%);
      max-height: min(86vh, 760px);
      overflow: auto;
      position: relative;
      padding: 26px;
      background: var(--paper-soft);
      border: 1px solid var(--paper-line-strong);
      border-radius: 8px;
      box-shadow: var(--shadow-md);
    }

    .settings-close {
      position: absolute;
      top: 12px;
      right: 12px;
    }

    .settings-title {
      margin: 0 34px 8px 0;
      font-family: var(--font-cn);
      font-size: 22px;
      line-height: 1.25;
      letter-spacing: 1px;
    }

    .settings-copy {
      margin: 0 0 20px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .settings-form {
      display: grid;
      gap: 12px;
    }

    .settings-label {
      color: var(--faint);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
    }

    .key-input {
      width: 100%;
      height: 46px;
      padding: 0 13px;
      color: var(--ink);
      background: var(--paper);
      border: 1.5px solid var(--paper-line-strong);
      border-radius: 6px;
      outline: 0;
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 14px;
    }

    .key-input:focus {
      border-color: var(--red);
      box-shadow: 0 0 0 3px rgba(226, 72, 61, .12);
    }

    .settings-status {
      min-height: 21px;
      color: var(--muted);
      font-size: 13px;
    }

    .settings-actions {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-top: 4px;
    }

    .settings-section {
      margin-top: 22px;
      padding-top: 20px;
      border-top: 1px solid var(--paper-line);
    }

    .settings-account {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      padding: 14px 0 18px;
      border-bottom: 1px solid var(--paper-line);
    }

    .settings-account strong {
      display: block;
      margin-top: 4px;
      font-family: var(--font-sans);
      font-size: 16px;
      letter-spacing: 0;
    }

    .settings-hidden {
      display: none !important;
    }

    .voice-list {
      display: grid;
      gap: 9px;
      margin-top: 12px;
    }

    .voice-option {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 72px 78px;
      gap: 10px;
      align-items: center;
      padding: 11px 12px;
      border: 1px solid var(--paper-line);
      border-radius: 8px;
      background: rgba(252, 250, 243, .68);
      transition: border-color .16s var(--ease), background .16s var(--ease);
    }

    .voice-option.is-selected {
      border-color: rgba(226, 72, 61, .55);
      background: rgba(253, 230, 226, .52);
    }

    .voice-name {
      display: grid;
      gap: 3px;
      min-width: 0;
    }

    .voice-name strong {
      color: var(--ink);
      font-size: 15px;
      line-height: 1.25;
    }

    .voice-name span {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.3;
    }

    .voice-preview-btn,
    .voice-use-btn {
      min-height: 38px;
      padding: 0 10px;
      font-size: 14px;
      white-space: nowrap;
    }

    .voice-preview-btn.is-playing {
      color: var(--red);
      border-color: rgba(226, 72, 61, .55);
      background: rgba(226, 72, 61, .08);
    }

    .overlay {
      position: fixed;
      inset: 0;
      z-index: 100;
      display: none;
      align-items: center;
      justify-content: center;
      background: rgba(247, 243, 233, .78);
      backdrop-filter: blur(8px);
    }

    .overlay.on {
      display: flex;
    }

    .overlay-box {
      min-width: min(320px, calc(100% - 48px));
      padding: 24px 26px;
      text-align: center;
      background: var(--paper-deep);
      border: 1px solid var(--paper-line);
      box-shadow: var(--shadow-md);
    }

    .spinner {
      width: 34px;
      height: 34px;
      margin: 0 auto 14px;
      border-radius: 50%;
      border: 2.5px solid var(--paper-line-strong);
      border-top-color: var(--red);
      animation: spin .74s linear infinite;
    }

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

    .overlay-text {
      color: var(--ink-soft);
      font-size: 15px;
    }

    .toast {
      position: fixed;
      left: 50%;
      bottom: 28px;
      z-index: 120;
      max-width: min(520px, calc(100% - 32px));
      padding: 12px 18px;
      color: #fff;
      background: var(--ink);
      border-radius: 6px;
      box-shadow: var(--shadow-md);
      font-size: 14px;
      opacity: 0;
      pointer-events: none;
      transform: translate(-50%, 10px);
      transition: opacity .2s ease, transform .2s var(--ease);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .toast.on {
      opacity: 1;
      transform: translate(-50%, 0);
    }