/* ============================================================
   气泡样式设置卡片（设置 → 外观与声音 → 气泡）
   预览区是真气泡，质感全部来自 css/chat/bubble-styles.css；
   格子里的色片只用主题变量示意质感，不写死任何颜色。
   ============================================================ */

/* ---------------- 预览 ---------------- */
.kb-preview {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 9px;
    padding: 15px 12px;
    border-radius: 16px;
    border: 1px solid var(--border, rgba(120, 100, 90, 0.16));
    background: var(--bg-chat, rgba(250, 247, 244, 0.92));
    isolation: isolate;
}
/* 背后放一点软光，磨砂/透明那两档才看得出「透过来的是什么」 */
.kb-preview::before {
    content: '';
    position: absolute;
    right: -26px;
    top: -34px;
    width: 132px;
    height: 132px;
    border-radius: 50%;
    background: radial-gradient(circle at 32% 32%, var(--rose-light, rgba(201, 139, 147, 0.24)), transparent 70%);
    pointer-events: none;
    z-index: 0;
}
.kb-preview .msg {
    position: relative;
    z-index: 1;
    margin: 0;
    display: flex;
    width: 100%;
}
.kb-preview .msg.user { justify-content: flex-end; }
.kb-preview .msg .bubble {
    max-width: 88%;
    font-size: 13px;
    line-height: 1.45;
    padding: 7px 10px 6px;
}

/* ---------------- 格子 ---------------- */
.kb-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 10px;
}
.kb-tile {
    -webkit-appearance: none;
    appearance: none;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 8px 9px 9px;
    border-radius: 14px;
    border: 1px solid var(--border, rgba(120, 100, 90, 0.16));
    background: var(--surface, #fff);
    color: var(--text-primary, #3a3330);
    text-align: left;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: transform 0.16s ease, border-color 0.18s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.kb-tile:active { transform: scale(0.97); }
.kb-tile:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--rose-tint, rgba(201, 139, 147, 0.26));
}
.kb-tile.is-on {
    border-color: var(--accent-rose, #c98b93);
    background: var(--rose-tint, rgba(201, 139, 147, 0.08));
    box-shadow: 0 0 0 2px var(--rose-tint, rgba(201, 139, 147, 0.22)), 0 6px 14px -10px rgba(160, 110, 115, 0.5);
}
.kb-sw {
    position: relative;
    display: block;
    height: 26px;
    border-radius: 9px;
    border: 1px solid var(--border, rgba(120, 100, 90, 0.16));
    background: var(--surface, #fff);
    overflow: hidden;
}
/* 色片背后一颗小光点：磨砂、透明、描线才有东西可透 */
.kb-sw::after {
    content: '';
    position: absolute;
    right: 12%;
    top: 30%;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--rose-light, rgba(201, 139, 147, 0.3));
    pointer-events: none;
}
.kb-sw[data-k='frost'] {
    background: color-mix(in srgb, var(--bubble-assistant, #fff) 78%, transparent);
    border-color: var(--glass-border, var(--border, rgba(255, 255, 255, 0.32)));
    -webkit-backdrop-filter: blur(6px) saturate(1.08);
    backdrop-filter: blur(6px) saturate(1.08);
}
.kb-sw[data-k='matte'] {
    background-image: linear-gradient(160deg, color-mix(in srgb, var(--text-primary, #3a3330) 6%, transparent), transparent 60%);
}
.kb-sw[data-k='velvet'] {
    background-image: linear-gradient(145deg, color-mix(in srgb, var(--text-primary, #3a3330) 10%, transparent), transparent 44%, color-mix(in srgb, var(--text-primary, #3a3330) 4%, transparent));
    box-shadow: inset 0 2px 3px color-mix(in srgb, var(--text-primary, #3a3330) 12%, transparent);
}
.kb-sw[data-k='goldline'] {
    border-color: var(--accent, #c8a87c);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent, #c8a87c) 26%, transparent);
}
.kb-sw[data-k='outline'] {
    background: transparent;
    border-color: var(--glass-border, var(--border, rgba(255, 255, 255, 0.5)));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--border, #cbb6a8) 55%, transparent);
}
.kb-name {
    font-size: 12.5px;
    line-height: 1.3;
    letter-spacing: 0.2px;
    margin-top: 2px;
}
.kb-note {
    font-size: 10.5px;
    line-height: 1.35;
    color: var(--text-muted, #9a908a);
}
.kb-hint {
    margin: 10px 2px 0;
    font-size: 11px;
    line-height: 1.65;
    color: var(--text-muted, #9a908a);
}

/* ---------------- 窄屏 / 动效 ---------------- */
@media (max-width: 370px) {
    .kb-tile { padding: 7px 8px 8px; }
    .kb-name { font-size: 12px; }
    .kb-note { font-size: 10px; }
    .kb-sw { height: 23px; }
}
@media (prefers-reduced-motion: reduce) {
    .kb-tile { transition: none; }
}