/* 详情与 AI 聊天正文共用划词菜单、翻译和提问气泡。 */
.kb-sel-menu,
.kb-sel-pop {
    --kb-sel-surface: var(--bg-primary);
    --kb-sel-border: color-mix(in srgb, var(--border-color) 72%, var(--text-muted) 28%);
    --kb-sel-control-size: 36px;
    position: fixed;
    z-index: var(--z-tooltip);
    box-sizing: border-box;
    border: 1px solid var(--kb-sel-border);
    background: var(--kb-sel-surface);
    color: var(--text-primary);
    font-family: var(--font-family-ui, system-ui, sans-serif);
    isolation: isolate;
    overflow: visible;
}

.kb-sel-menu {
    display: inline-flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 2px;
    padding: 4px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    max-width: var(--kb-sel-viewport-width, calc(100vw - 24px));
}

.kb-sel-menu .kb-sel-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    gap: 5px;
    min-height: var(--kb-sel-control-size);
    padding: 0 9px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
}

.kb-sel-pop {
    display: flex;
    flex-direction: column;
    width: min(400px, var(--kb-sel-viewport-width, calc(100vw - 24px)));
    max-height: min(520px, var(--kb-sel-available-height, calc(var(--kb-vh, 100dvh) - 24px)));
    border-radius: 16px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.18), 0 2px 8px rgba(0, 0, 0, 0.08);
    font-size: 14px;
    line-height: 1.65;
}

.kb-sel-pop-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex: 0 0 auto;
    gap: 12px;
    padding: 8px 8px 4px 16px;
    user-select: none;
}

.kb-sel-pop-title {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}

.kb-sel-pop-title i {
    color: var(--kb-accent);
}

/* 显式隔离通用 button / submit 样式，所有操作均为同尺寸的图标按钮。 */
.kb-sel-pop button.kb-sel-pop-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 var(--kb-sel-control-size);
    width: var(--kb-sel-control-size);
    min-width: var(--kb-sel-control-size);
    height: var(--kb-sel-control-size);
    min-height: var(--kb-sel-control-size);
    max-height: var(--kb-sel-control-size);
    padding: 0 !important;
    margin: 0;
    border: 0 !important;
    border-radius: 8px;
    background: transparent !important;
    color: var(--text-secondary) !important;
    font-size: 18px;
    line-height: 1;
    box-shadow: none !important;
    transform: none !important;
    cursor: pointer;
}

.kb-sel-pop button.kb-sel-pop-send {
    color: var(--kb-accent) !important;
}

.kb-sel-pop-source {
    flex: 0 0 auto;
    min-height: 0;
    margin: 4px 16px 8px;
    padding: 8px 12px;
    border-radius: 10px;
    background: var(--bg-secondary);
}

.kb-sel-pop-label {
    display: block;
    margin-bottom: 3px;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
}

.kb-sel-pop-quote {
    color: var(--text-secondary);
    font-style: normal;
    line-height: 1.6;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kb-sel-pop-thread {
    flex: 1 1 auto;
    min-height: 0;
    padding: 4px 16px 12px;
    overflow-wrap: anywhere;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.kb-sel-pop-thread:empty {
    display: none;
}

.kb-sel-pop-q {
    margin: 4px 0 10px auto;
    width: fit-content;
    max-width: 85%;
    padding: 5px 10px;
    border-radius: 10px;
    background: var(--bg-secondary);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.kb-sel-pop-a {
    overflow-wrap: anywhere;
}

.kb-sel-pop-a > :first-child { margin-top: 0; }
.kb-sel-pop-a > :last-child { margin-bottom: 0; }
.kb-sel-pop-muted { color: var(--text-muted); }
.kb-sel-pop-error { color: var(--color-error); }

.kb-sel-pop .kb-sel-pop-form {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    flex: 0 0 auto;
    gap: 4px;
    margin: 0 12px 12px;
    padding: 4px 4px 4px 12px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-secondary);
}

.kb-sel-pop .kb-sel-pop-form:focus-within {
    border-color: var(--kb-accent);
}

/* 外层只有一圈边框；覆盖 reading-theme / form-unified 的输入焦点光晕和底色。 */
.kb-sel-pop .kb-sel-pop-input,
.kb-sel-pop .kb-sel-pop-input:focus {
    display: block;
    box-sizing: border-box;
    flex: 1 1 0%;
    width: 0;
    min-width: 0;
    height: var(--kb-sel-control-size);
    min-height: var(--kb-sel-control-size);
    max-height: var(--kb-sel-control-size);
    margin: 0;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    color: var(--text-primary);
    font: inherit;
    font-size: 14px;
    line-height: normal;
    outline: none !important;
    box-shadow: none !important;
    -webkit-appearance: none;
    appearance: none;
}

.kb-sel-pop .kb-sel-pop-input::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.kb-sel-pop-foot {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: nowrap;
    gap: 4px;
    flex: 0 0 auto;
    padding: 0 8px 8px;
}

.kb-sel-pop-foot:not(:has(button:not([hidden]))) { display: none; }
.kb-sel-menu[hidden],
.kb-sel-pop button[hidden] { display: none !important; }

/* 菜单与结果面板共用气泡箭头；左右避让后仍指向选中文字。 */
.kb-sel-menu::before,
.kb-sel-menu::after,
.kb-sel-pop::before,
.kb-sel-pop::after {
    content: '';
    position: absolute;
    left: var(--kb-sel-arrow-x, 50%);
    width: 0;
    height: 0;
    border-style: solid;
    border-color: transparent;
    transform: translateX(-50%);
    z-index: 1;
    pointer-events: none;
}

.kb-sel-menu[data-side="above"]::before,
.kb-sel-pop[data-side="above"]::before {
    bottom: -10px;
    border-width: 10px 10px 0;
    border-top-color: var(--kb-sel-border);
}

.kb-sel-menu[data-side="above"]::after,
.kb-sel-pop[data-side="above"]::after {
    bottom: -8px;
    border-width: 9px 9px 0;
    border-top-color: var(--kb-sel-surface);
}

.kb-sel-menu[data-side="below"]::before,
.kb-sel-pop[data-side="below"]::before {
    top: -10px;
    border-width: 0 10px 10px;
    border-bottom-color: var(--kb-sel-border);
}

.kb-sel-menu[data-side="below"]::after,
.kb-sel-pop[data-side="below"]::after {
    top: -8px;
    border-width: 0 9px 9px;
    border-bottom-color: var(--kb-sel-surface);
}

.kb-sel-pop-a pre,
.kb-sel-pop-a table { max-width: 100%; overflow-x: auto; }
.kb-sel-pop-a pre { white-space: pre; }
.kb-sel-pop-a table { display: block; }

.kb-sel-menu .kb-sel-menu-btn:focus-visible,
.kb-sel-pop button.kb-sel-pop-icon:focus-visible {
    outline: 2px solid var(--kb-accent);
    outline-offset: 1px;
}

@media (any-hover: hover) {
    .kb-sel-menu .kb-sel-menu-btn:hover:not(:where(html[data-kb-pointer="touch"] *)):where(:not(:disabled):not(.is-loading):not([aria-disabled="true"])),
    .kb-sel-pop button.kb-sel-pop-icon:hover:not(:where(html[data-kb-pointer="touch"] *)):where(:not(:disabled):not(.is-loading):not([aria-disabled="true"])) {
        background: var(--kb-active-bg) !important;
        color: var(--kb-accent) !important;
    }
}

@media (max-width: 1023px) {
    .kb-sel-menu,
    .kb-sel-pop { --kb-sel-control-size: 44px; }
    .kb-sel-pop .kb-sel-pop-input,
    .kb-sel-pop .kb-sel-pop-input:focus { font-size: 16px; }
}

/* 小屏以图标呈现四个操作，不折行；名称由 aria-label / title 保留。 */
@media (max-width: 480px) {
    .kb-sel-menu .kb-sel-menu-btn { width: 44px; padding: 0; font-size: 18px; }
    .kb-sel-menu-btn span { display: none; }
}

.kb-sel-pop-source-head { display: flex; align-items: center; gap: 4px; min-width: 0; margin-bottom: 3px; }
.kb-sel-pop-source-head .kb-sel-pop-label { flex: 0 0 auto; margin: 0 auto 0 0; white-space: nowrap; }
.kb-sel-pop button[data-sel-speak][aria-pressed="true"] { color: var(--kb-accent) !important; background: var(--kb-active-bg) !important; }
.kb-sel-pop button[data-sel-speak]:disabled { opacity: 1 !important; color: var(--kb-control-disabled-text, var(--text-muted)) !important; background: transparent !important; cursor: not-allowed; }
.kb-sel-pop-speech-status { flex: 0 0 auto; padding: 0 16px 10px; font-size: 12px; color: var(--text-muted); }
.kb-sel-pop-speech-status[hidden] { display: none !important; }

.kb-sel-pop-model-hint { display: flex; align-items: flex-start; gap: 5px; flex: 0 0 auto; margin: 0; padding: 0 14px 12px; font-size: 11px; line-height: 1.5; color: var(--text-muted); overflow-wrap: anywhere; }

.kb-sel-pop-model-hint > i { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; height: 1.5em; margin: 0; font-size: 11px; line-height: 1; }
.kb-sel-pop-model-hint > span { min-width: 0; }