/* 主题切换器 — 前台/后台共用 */
.theme-switcher {
    position: relative;
    flex-shrink: 0;
}

.btn-theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card);
    color: var(--text);
    cursor: pointer;
    font-family: inherit;
    transition: border-color .15s, background .15s;
}

.btn-theme-toggle:hover {
    border-color: var(--accent);
    background: rgba(var(--accent-rgb), .08);
}

.theme-icon { font-size: 16px; line-height: 1; }

.theme-panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 220px;
    padding: 12px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
    z-index: 300;
}

.theme-panel.is-hidden { display: none !important; }

.theme-panel-title {
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 10px;
    font-weight: 600;
}

.theme-panel-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

.theme-swatch-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 4px 2px;
    border: 2px solid transparent;
    border-radius: 8px;
    background: none;
    cursor: pointer;
    font-family: inherit;
    transition: border-color .15s, background .15s;
}

.theme-swatch-btn:hover { background: rgba(var(--accent-rgb), .06); }

.theme-swatch-btn.active {
    border-color: var(--accent);
    background: rgba(var(--accent-rgb), .10);
}

.theme-swatch-btn .swatch {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid transparent;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,.06);
}

.theme-swatch-btn .swatch-name {
    font-size: 10px;
    color: var(--muted);
    line-height: 1.1;
    text-align: center;
}

/* 后台：固定右上角 */
.admin-theme-bar {
    position: fixed;
    top: 14px;
    right: 20px;
    z-index: 200;
}

@media (max-width: 640px) {
    .theme-panel {
        width: 200px;
        right: -8px;
    }
    .theme-panel-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}