/* ============================================================
   C++ 人话教程 · UI 组件库（HMOS NEXT 风格，无描边）
   组件：代码块 / 表格 / 卡片 / 目录条目 / 提示框 /
        目录导航 / 浮动按钮 / 徽章
   ============================================================ */

/* ---- 窄屏适配：表格缩小字号，长内容换行 ---- */
@media (max-width: 700px) {
    table { font-size: .78em; }
    th, td { padding: 8px 10px; }
}

/* ---- 代码块 ---- */
pre {
    background: var(--prebg);
    padding: 16px 18px;
    border-radius: 16px;
    overflow-x: auto;
    color: var(--prefg);
    font-size: .86em;
    line-height: 1.6;
    box-shadow: var(--shadow);
    font-family: "JetBrains Mono", "Fira Code", monospace;
}
pre code { background: none; color: inherit; padding: 0; font-size: 1em; }

/* ---- 表格 ---- */
table {
    border-collapse: collapse;
    table-layout: fixed;
    margin: 12px 0; width: 100%;
    font-size: .92em;
    border-radius: 16px;
    box-shadow: var(--shadow);
}
th, td {
    padding: 10px 14px; text-align: left;
    vertical-align: middle;
    overflow-wrap: anywhere;
    word-break: break-all;
    word-break: break-word;
}
th { background: var(--card2); color: var(--dim); font-weight: 600; }
td { background: var(--card); border-top: 1px solid var(--row); }
tr:nth-child(even) td { background: var(--card2); }

/* ---- 卡片（整块可点） ---- */
.card {
    display: block;
    background: var(--card);
    border-radius: 16px;
    padding: 16px 20px;
    margin: 12px 0;
    box-shadow: var(--shadow);
    text-decoration: none;
    color: var(--fg);
    transition: background .2s, transform .1s;
    cursor: pointer;
}
.card:hover { background: var(--card2); }
.card:active { transform: scale(.98); }
.card h3 { color: var(--acc); margin: 0 0 6px; }
.card p { margin: 4px 0; }

.badge {
    display: inline-block;
    background: var(--notebg);
    color: var(--acc);
    border-radius: 10px;
    padding: 2px 10px;
    font-size: .78em;
    margin-right: 6px;
}

/* ---- 目录条目（整行可点） ---- */
.tocline {
    display: flex; flex-wrap: wrap; align-items: center;
    column-gap: 10px; row-gap: 2px;
    padding: 10px 16px;
    border-radius: 14px;
    background: var(--card);
    box-shadow: var(--shadow);
    margin: 7px 0;
    text-decoration: none;
    color: var(--fg);
    transition: background .2s;
    cursor: pointer;
}
.tocline:hover { background: var(--card2); }
.tocline .tn {
    font-family: "JetBrains Mono", "Fira Code", monospace;
    color: var(--dim); width: 30px; flex-shrink: 0; text-align: right;
}
.tocline .tf {
    font-family: "JetBrains Mono", "Fira Code", monospace;
    color: var(--acc);
    flex-shrink: 1;
    min-width: 0;
    overflow-wrap: anywhere;
    word-break: break-all;
}
.tocline .td {
    color: var(--dim); flex: 1 1 100%;
    min-width: 0; word-break: break-word; text-align: left;
}
.toc-group { color: var(--acc2); margin: 22px 0 10px; font-size: 1.05em; font-weight: 600; }

/* ---- 提示框 ---- */
.note { background: var(--notebg); padding: 12px 16px; border-radius: 16px; margin: 16px 0; }
.warn { background: var(--warnbg); padding: 12px 16px; border-radius: 16px; margin: 16px 0; }

/* ---- 目录导航（测试总览 / 首页 / 手册底部目录） ---- */
nav.toc a {
    color: var(--acc); text-decoration: none;
    display: block; padding: 6px 12px; border-radius: 12px;
}
nav.toc a:hover { background: var(--card2); color: var(--acc2); }
nav.toc { column-count: 2; column-gap: 40px; }
nav.toc > div { break-inside: avoid; }
@media (max-width: 700px) { nav.toc { column-count: 1; } }

/* ---- 浮动按钮（左上返回上一页 / 右上主题 / 左下上一章 / 右下下一章） ---- */
#themeBtn, #prevBtn, #nextBtn, #homeBtn {
    position: fixed; z-index: 9999;
    height: 46px;
    display: flex; align-items: center; justify-content: center;
    background: var(--btnbg);
    color: var(--fg);
    border: none; border-radius: 999px;
    cursor: pointer;
    font-size: 1.15em; line-height: 1;
    box-shadow: var(--shadow);
    transition: background .2s;
    user-select: none; pointer-events: auto;
    text-decoration: none;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}
#themeBtn, #prevBtn, #nextBtn { width: 46px; }
#themeBtn:hover, #prevBtn:hover, #nextBtn:hover, #homeBtn:hover { background: var(--acc); color: #fff; }
#themeBtn { top: 14px; right: 14px; }
#homeBtn  { top: 14px; left: 50%; transform: translateX(-50%); padding: 0 20px; font-size: .92em; }
#prevBtn  { left: 14px; bottom: 20px; }
#nextBtn  { right: 14px; bottom: 20px; }
#prevBtn[disabled] { opacity: .35; pointer-events: none; cursor: default; background: var(--card2); }

/* ---- 目录抽屉（左上菜单键唤出） ---- */
#menuBtn, #closeBtn {
    position: fixed; z-index: 9999;
    top: 14px; left: 14px;
    width: 46px; height: 46px;
    display: flex; align-items: center; justify-content: center;
    background: var(--btnbg);
    color: var(--fg);
    border: none; border-radius: 999px;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: background .2s;
    user-select: none; pointer-events: auto;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}
#menuBtn:hover, #closeBtn:hover { background: var(--acc); color: #fff; }
#menuBtn svg, #closeBtn svg { display: block; width: 24px; height: 24px; pointer-events: none; }
#closeBtn { display: none; }

#drawer {
    overflow-x: hidden;
    position: fixed; z-index: 9998;
    top: 0; left: 0; bottom: 0;
    width: min(320px, 86vw);
    background: var(--card);
    box-shadow: var(--shadow);
    transform: translateX(-105%);
    transition: transform .28s ease;
    overflow-y: auto;
    padding: 76px 16px 40px;
    border-radius: 0 20px 20px 0;
}
#drawer.open { transform: translateX(0); }
#drawer .tocline { box-shadow: none; }
#searchBox {
    width: 100%;
    padding: 10px 16px;
    border: none;
    border-radius: 999px;
    background: var(--card2);
    color: var(--fg);
    font-size: .95em;
    font-family: inherit;
    outline: none;
    margin-bottom: 10px;
    box-sizing: border-box;
}
#searchBox::placeholder { color: var(--dim); }
#searchBox:focus { background: var(--codebg); }
#searchCount { margin: 4px 8px; font-size: .85em; }
mark {
    background: var(--notebg);
    color: var(--acc);
    font-weight: 700;
    padding: 0 2px;
    border-radius: 4px;
}
.search-summary {
    display: block;
    margin: 0;
    padding: 2px 16px 10px 44px;
    font-size: .85em;
    color: var(--dim);
    word-break: break-all;
}
#drawer .drawer-title {
    color: var(--acc); font-size: 1.1em; font-weight: 600;
    margin: 0 8px 14px;
}
#mask {
    position: fixed; inset: 0; z-index: 9997;
    background: rgba(0,0,0,.45);
    opacity: 0; pointer-events: none;
    transition: opacity .25s;
}
#mask.show { opacity: 1; pointer-events: auto; }
#themeBtn svg { display: block; width: 24px; height: 24px; pointer-events: none; }

/* ---- 逐行解释表（混合编程手册用） ---- */
table.code { width: 100%; border-collapse: collapse; margin: 14px 0 20px;
    font-family: "JetBrains Mono", "Fira Code", monospace; font-size: .82em;
    border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
table.code caption { text-align: left; font-weight: bold; color: var(--acc); padding: 6px 0; }
table.code th { background: var(--card2); color: var(--dim); text-align: left;
    padding: 8px 12px; position: sticky; top: 0; }
table.code td { padding: 4px 12px; vertical-align: top; background: var(--card);
    border-top: 1px solid var(--row); }
table.code tr:nth-child(even) td { background: var(--card2); }
table.code td.ln { color: var(--dim); text-align: right; width: 38px; user-select: none; }
table.code td.src { white-space: pre-wrap; word-break: break-all; color: var(--prefg); }
table.code td.exp { color: var(--dim); font-family: inherit; font-size: .95em; }
table.code tr.cmt td { color: #7d869a; }

/* ---- 命令 / 输出块 ---- */
pre.cmd { background: var(--codebg); padding: 10px 14px; border-radius: 14px;
    overflow-x: auto; color: var(--acc); font-size: .9em; }
pre.out { background: var(--prebg); padding: 12px 16px; border-radius: 16px;
    overflow-x: auto; color: var(--ok); font-size: .85em; box-shadow: var(--shadow); }