/* ==========================================
   Nav Tool Dropdown — 共享组件
   挂在主 nav 的「工具」链接上，点击/悬停展开
   自带浅色 + 兜底字体变量，可在任何主题页面使用
   ========================================== */

.nav-tool { position: relative; display: inline-flex; }

.nav-tool-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: none;
    border: 0;
    padding: 0;
    margin: 0;
    color: inherit;
    font-family: inherit;
    font-size: inherit;
    font-weight: inherit;
    cursor: pointer;
    transition: color 0.15s, opacity 0.15s;
    white-space: nowrap;
}
.nav-tool-trigger:hover { opacity: 0.85; }
.nav-tool-trigger .nav-tool-chevron {
    width: 12px;
    height: 12px;
    transition: transform 0.2s;
    opacity: 0.6;
}
.nav-tool-trigger[aria-expanded="true"] .nav-tool-chevron { transform: rotate(180deg); opacity: 1; }

.nav-tool-panel {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    transform: translateX(-50%) translateY(-6px);
    width: 280px;
    background: #FFFFFF;
    border: 1px solid #E7E5E4;
    border-radius: 0.75rem;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
    padding: 0.4rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s, transform 0.15s;
    z-index: 60;
    /* 让 panel 字体始终走 body 字体（不继承 nav 的 mono 等） */
    font-family: "Plus Jakarta Sans", "PingFang SC", "HarmonyOS Sans SC", -apple-system, sans-serif;
    color: #0A0A0A;
}
.nav-tool-panel.is-open {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* 上方小三角指示器 */
.nav-tool-panel::before {
    content: "";
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: #FFFFFF;
    border-top: 1px solid #E7E5E4;
    border-left: 1px solid #E7E5E4;
}

.nav-tool-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background 0.1s;
    color: #0A0A0A;
    text-decoration: none;
}
.nav-tool-item:hover { background: #F5F5F4; color: #0A0A0A; }

.nav-tool-item-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #FAFAF9;
    border: 1px solid #E7E5E4;
    border-radius: 0.4rem;
    font-size: 0.85rem;
    font-family: "Geist Mono", "JetBrains Mono", monospace;
    color: #737373;
    font-weight: 600;
}
.nav-tool-item-body { flex: 1; min-width: 0; }
.nav-tool-item-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: #0A0A0A;
    margin-bottom: 0.1rem;
    line-height: 1.3;
}
.nav-tool-item-desc {
    font-size: 0.75rem;
    color: #737373;
    line-height: 1.4;
    font-weight: 400;
}

/* 占位状态 */
.nav-tool-item.is-placeholder { cursor: default; }
.nav-tool-item.is-placeholder:hover { background: transparent; }
.nav-tool-item.is-placeholder .nav-tool-item-name { color: #737373; }

.nav-tool-foot {
    margin-top: 0.4rem;
    padding: 0.6rem 0.75rem;
    border-top: 1px solid #E7E5E4;
    font-size: 0.75rem;
    color: #737373;
    text-align: center;
    font-family: "Geist Mono", "JetBrains Mono", monospace;
}

/* === 移动端微调 === */
@media (max-width: 640px) {
    .nav-tool-panel {
        width: 260px;
        left: auto;
        right: 0;
        transform: translateY(-6px);
    }
    .nav-tool-panel.is-open { transform: translateY(0); }
    .nav-tool-panel::before {
        left: auto;
        right: 24px;
        transform: rotate(45deg);
    }
}