/**
 * os-artificer 技术圈 — 站点主样式表
 * 位于 style/，供仓库根目录 index.html 引用
 */

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    color: #1f2937;
    overflow: hidden;
}

/* Vue 包装层：确保 nav/main 仍然横向并排 */
#app {
    display: flex;
    width: 100%;
    height: 100%;
    min-width: 0;
}

/* 左侧导航 */
.nav {
    width: 280px;
    min-width: 240px;
    max-width: 40vw;
    border-right: 1px solid #e5e7eb;
    background: #f9fafb;
    overflow-y: auto;
    padding: 1rem 0.75rem 2rem;
    flex-shrink: 0;
}

.nav h2 {
    margin: 0 0 1rem;
    padding: 0 0.5rem;
    font-size: 1.1rem;
    color: #111827;
}

/* 可折叠分类 */
.nav-group {
    margin-bottom: 0.45rem;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background: #fff;
    overflow: hidden;
}

.nav-group > summary {
    list-style: none;
    cursor: pointer;
    user-select: none;
    padding: 0.5rem 0.65rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.nav-group > summary::-webkit-details-marker {
    display: none;
}

.nav-group > summary::after {
    content: "▸";
    font-size: 0.65rem;
    opacity: 0.9;
    transition: transform 0.15s ease;
}

.nav-group[open] > summary::after {
    transform: rotate(90deg);
}

/* 分类名：朴素纯色底，与下方文章链接区分 */
.nav-category--cpp {
    background: #475569;
}

.nav-category--go {
    background: #0f766e;
}

.nav-category--arch {
    background: #6b21a8;
}

.nav-group ul {
    list-style: none;
    margin: 0;
    padding: 0.35rem 0.25rem 0.5rem;
    background: #f9fafb;
}

.nav li {
    margin: 0;
}

.nav a {
    display: block;
    padding: 0.45rem 0.5rem;
    border-radius: 6px;
    color: #2563eb;
    text-decoration: none;
    font-size: 0.9rem;
}

.nav a:hover {
    background: #e5e7eb;
    color: #1d4ed8;
}

.nav a:focus {
    outline: 2px solid #93c5fd;
    outline-offset: 1px;
}

.nav a.active {
    background: #dbeafe;
    color: #1e40af;
    font-weight: 500;
}

.nav-footer {
    margin-top: 1.5rem;
    padding: 0.75rem 0.5rem 0;
    border-top: 1px solid #e5e7eb;
    font-size: 0.8rem;
    color: #6b7280;
}

.nav-qr {
    width: 100%;
    padding: 0.5rem 0.5rem 0;
}

.nav-qr img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 6px;
}

/* 右侧内容区 */
.main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    background: #fff;
}

.main iframe {
    flex: 1;
    width: 100%;
    border: none;
    min-height: 0;
}

.main #article {
    flex: 1;
    min-height: 0;
    width: 100%;
}