/* ===========================================================================
   Lumina Blog v1.2.0 · base.css
   设计规范：纯色（零渐变）· 淡色系 · 极简线条与色块 · 原生 Android 观感
   深浅自适应：全部颜色走 CSS 变量（由 includes/styles.php 注入），
   默认值通过 prefers-color-scheme 提供，JS 也可用 data-theme 覆盖。
   =========================================================================== */

/* ---------------- 变量兜底（未注入样式时仍可正常显示） ---------------- */
:root {
    --primary: #3b82f6; --primary-strong: #1d4ed8; --primary-soft: #e8f0ff;
    --bg: #f4f7fd; --bg-soft: #eaeff8; --card: #ffffff;
    --text: #1e293b; --muted: #64748b; --border: #e2e8f2;
    --radius: 16px; --radius-sm: 10px; --content-width: 1120px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary: #7fb0ff; --primary-strong: #a9c8ff; --primary-soft: #1d2a42;
        --bg: #12151c; --bg-soft: #181c25; --card: #1b1f27;
        --text: #e6e9ef; --muted: #a4acba; --border: #2b313c;
    }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: calc(16px * var(--font-scale, 1));
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background-color .25s ease, color .25s ease;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary-strong); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--primary); }
h1, h2, h3, h4 { line-height: 1.32; margin: 0 0 .5em; font-weight: 700; color: var(--text); }
p { margin: 0 0 1em; }
hr { border: 0; border-top: 1px solid var(--border); margin: 22px 0; }
code, pre { font-family: Consolas, "Courier New", monospace; }
mark.hl { background: var(--primary-soft); color: var(--primary-strong); padding: 0 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: var(--content-width); margin: 0 auto; padding: 0 18px; }
.page { min-height: 100vh; display: flex; flex-direction: column; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 60;
}
.header-inner { display: flex; align-items: center; gap: 14px; min-height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; color: var(--text); }
.brand-avatar {
    width: 36px; height: 36px; border-radius: 50%; object-fit: cover;
    background: var(--primary-soft); border: 1px solid var(--border);
}
.brand-avatar--text { display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--primary-strong); }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 1.05rem; }
.brand-text em { font-style: normal; font-size: .74rem; color: var(--muted); }

.site-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link {
    padding: 8px 12px; border-radius: 999px; color: var(--text);
    font-size: .94rem; font-weight: 500;
}
.nav-link:hover { background: var(--primary-soft); color: var(--primary-strong); }
.nav-link.is-active { background: var(--primary-bg, var(--primary)); color: var(--on-primary, #fff); }

.pref-bar { display: flex; align-items: center; gap: 6px; flex: 0 0 auto; }
.pref { display: inline-flex; align-items: center; gap: 4px; }
.pref-ico { font-size: .78rem; color: var(--muted); }
.pref-select {
    appearance: none; -webkit-appearance: none;
    border: 1px solid var(--border); background: var(--bg-soft); color: var(--text);
    border-radius: 8px; padding: 5px 8px; font-size: .8rem; font-family: inherit; cursor: pointer;
    max-width: 108px;
}
.pref-select:focus { outline: 2px solid var(--primary-soft); }

.nav-toggle { display: none; width: 40px; height: 38px; border: 1px solid var(--border); background: var(--bg-soft); border-radius: 10px; cursor: pointer; padding: 9px 8px; flex-direction: column; justify-content: space-between; }
.nav-toggle-bar { display: block; height: 2px; background: var(--text); border-radius: 2px; }

/* ---------------- 布局 ---------------- */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; padding-top: 22px; padding-bottom: 34px; align-items: start; }
.sidebar-left .layout { grid-template-columns: 320px minmax(0, 1fr); }
.sidebar-left .col-main { order: 2; }
.sidebar-left .col-side { order: 1; }
.sidebar-none .layout { grid-template-columns: minmax(0, 1fr); }
.sidebar-none .col-side { display: none; }
.col-main { min-width: 0; }
.col-side { display: flex; flex-direction: column; gap: 16px; }

/* ---------------- 卡片 ---------------- */
.card {
    background: var(--card); border-radius: var(--radius);
    border: 1px solid var(--border); padding: 20px; margin-bottom: 18px;
}
.card-title { font-size: 1.02rem; margin: 0 0 12px; display: flex; align-items: center; gap: 8px; }

/* ---------------- 首页横幅 ---------------- */
.hero {
    background: var(--primary-soft); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 40px 32px; margin-bottom: 22px;
}
.hero-title { font-size: clamp(1.6rem, 3.6vw, 2.4rem); margin-bottom: .35em; }
.hero-sub { color: var(--muted); max-width: 62ch; margin-bottom: 1.2em; }

/* ---------------- 按钮 ---------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 18px; border-radius: 999px; border: 1px solid var(--border);
    background: var(--card); color: var(--text); font: inherit; font-weight: 600;
    cursor: pointer; transition: transform .12s ease, background-color .2s ease, border-color .2s ease;
    -webkit-tap-highlight-color: transparent;
}
.btn:hover { border-color: var(--primary); color: var(--primary-strong); }
.btn:active, .btn.is-bounce { transform: scale(.94); }
.btn-primary { background: var(--primary-bg, var(--primary)); border-color: var(--primary-bg, var(--primary)); color: var(--on-primary, #fff); }
.btn-primary:hover { background: var(--primary-bg-hover, var(--primary-strong)); border-color: var(--primary-bg-hover, var(--primary-strong)); color: var(--on-primary, #fff); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 6px 12px; font-size: .84rem; }
.btn-block { width: 100%; }

/* ---------------- 文章列表 ---------------- */
.post-card {
    display: block; background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
    color: inherit; transition: transform .14s ease, border-color .2s ease;
}
.post-card:active { transform: scale(.995); }
.post-card { transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.post-card:hover { border-color: var(--primary); }
html[data-hover="on"] .post-card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(0,0,0,.07); }
.post-cover { width: 100%; border-radius: var(--radius-sm); margin-bottom: 14px; }
.post-title { font-size: 1.24rem; margin-bottom: .3em; }
.post-meta { display: flex; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: .82rem; margin-bottom: .6em; }
.post-excerpt { color: var(--muted); margin: 0 0 .7em; }
.post-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
    display: inline-block; padding: 3px 10px; border-radius: 999px;
    background: var(--primary-soft); color: var(--primary-strong); font-size: .78rem;
}
.tag:hover { background: var(--primary-bg, var(--primary)); color: var(--on-primary, #fff); }
.tag-lg { font-size: .88rem; padding: 4px 12px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------------- 文章详情 ---------------- */
.article { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.article-title { font-size: clamp(1.5rem, 3.4vw, 2.05rem); }
.article-body { margin-top: 8px; }
.article-body h2 { margin-top: 1.4em; }
.article-body img { border-radius: var(--radius-sm); margin: 12px 0; }
.article-body blockquote {
    margin: 16px 0; padding: 10px 16px; border-left: 3px solid var(--primary);
    background: var(--primary-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text);
}
.article-body pre.md-code, .md-code {
    background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 14px 16px; overflow-x: auto; font-size: .88rem;
}
.article-foot { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--border); }
.post-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 18px; flex-wrap: wrap; }

/* ---------------- 分页 ---------------- */
.pagination { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 20px 0; }
.page-link {
    min-width: 38px; text-align: center; padding: 7px 12px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--card); color: var(--text); font-size: .9rem;
}
.page-link:hover { border-color: var(--primary); color: var(--primary-strong); }
.page-link.is-active { background: var(--primary-bg, var(--primary)); border-color: var(--primary-bg, var(--primary)); color: var(--on-primary, #fff); }

/* ---------------- 表单 ---------------- */
.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: .86rem; color: var(--muted); margin-bottom: 5px; }
.form-control, input[type=text], input[type=email], input[type=search], input[type=password], textarea, select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px;
    background: var(--bg-soft); color: var(--text); font: inherit; font-size: .94rem;
}
.form-control:focus, textarea:focus, input:focus, select:focus {
    outline: none; border-color: var(--primary); background: var(--card);
}
textarea { resize: vertical; min-height: 96px; }
.form-inline { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.form-inline .form-control { flex: 1 1 200px; }
.qm-captcha { display: flex; align-items: center; gap: 10px; }

/* ---------------- 提示 ---------------- */
.alert { border-radius: var(--radius-sm); padding: 11px 14px; margin-bottom: 14px; font-size: .9rem; border: 1px solid var(--border); }
.alert-ok { background: var(--primary-soft); color: var(--primary-strong); border-color: var(--primary-soft); }
.alert-err { background: var(--bg-soft); color: #d14343; border-color: #f0c9c9; }
.alert-info { background: var(--bg-soft); color: var(--muted); }
.empty { text-align: center; color: var(--muted); padding: 34px 10px; }

/* ---------------- 搜索 ---------------- */
.search-form { display: flex; gap: 8px; }
.search-suggest {
    margin-top: 8px; background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius-sm); overflow: hidden;
}
.search-suggest:empty { display: none; }
.search-suggest a { display: block; padding: 9px 12px; color: var(--text); border-bottom: 1px solid var(--border); font-size: .9rem; }
.search-suggest a:last-child { border-bottom: 0; }
.search-suggest a:hover { background: var(--primary-soft); }
.search-suggest .ss-type { font-size: .72rem; color: var(--muted); margin-left: 6px; }
.search-pop { position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 200; display: flex; justify-content: center; padding-top: 14vh; }
.search-pop[hidden] { display: none; }
.search-pop-inner { width: min(560px, 92vw); background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; height: fit-content; }

/* ---------------- 留言 / 帖子 ---------------- */
.msg-list, .rm-list { display: flex; flex-direction: column; gap: 12px; }
.msg-item, .rm-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px; }
.msg-head, .rm-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.msg-name, .rm-name { font-weight: 600; }
.msg-time, .rm-time { color: var(--muted); font-size: .78rem; margin-left: auto; }
.msg-content, .rm-content { color: var(--text); }
.msg-reply { margin-top: 10px; padding: 10px 12px; background: var(--bg-soft); border-radius: 8px; font-size: .92rem; }
.msg-reply strong { color: var(--primary-strong); }
.avatar-initial, .rm-avatar, .profile-avatar {
    width: 34px; height: 34px; border-radius: 50%; background: var(--primary-soft); color: var(--primary-strong);
    display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .95rem; flex: 0 0 auto;
}
.profile-avatar { width: 56px; height: 56px; font-size: 1.3rem; overflow: hidden; }
.profile-avatar img { width: 100%; height: 100%; object-fit: cover; }
.profile-body { text-align: center; }
.profile-name { font-weight: 700; margin-top: 8px; }
.profile-bio { color: var(--muted); font-size: .88rem; }
.profile-links { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 10px; }

/* ---------------- 浮动返回顶部 ---------------- */
.back-to-top, .back-top {
    position: fixed; right: 18px; bottom: 20px; width: 42px; height: 42px; border-radius: 50%;
    background: var(--primary-bg, var(--primary)); color: var(--on-primary, #fff); display: flex; align-items: center; justify-content: center;
    font-size: 1.15rem; box-shadow: none; z-index: 90; opacity: 0; pointer-events: none;
    transition: opacity .25s ease, transform .12s ease;
}
.back-to-top.is-show, .back-top.is-show { opacity: 1; pointer-events: auto; }
.back-to-top:active { transform: scale(.9); }

/* ---------------- 页脚 ---------------- */
.site-footer { margin-top: auto; background: var(--card); border-top: 1px solid var(--border); padding: 20px 0; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; color: var(--muted); font-size: .84rem; }
.footer-meta { display: flex; gap: 14px; }
.footer-ver { color: var(--muted); opacity: .8; }

/* ---------------- 文字表情 ---------------- */
.emoticon-picker { display: flex; flex-wrap: wrap; gap: 5px; margin: 8px 0; }
.emo-btn {
    border: 1px solid var(--border); background: var(--bg-soft); color: var(--text);
    border-radius: 8px; padding: 3px 7px; font-size: .82rem; cursor: pointer; font-family: inherit;
    transition: transform .12s ease, background-color .2s ease;
}
.emo-btn:hover { background: var(--primary-soft); }
.emo-btn:active { transform: scale(.9); }

/* ---------------- 响应式（移动端优先友好） ---------------- */
@media (max-width: 900px) {
    .layout, .sidebar-left .layout { grid-template-columns: minmax(0, 1fr); }
    .col-main, .col-side { order: 0; }
    .nav-toggle { display: flex; margin-left: auto; }
    .site-nav {
        display: none; position: absolute; left: 0; right: 0; top: 100%;
        flex-direction: column; align-items: stretch; gap: 2px;
        background: var(--card); border-bottom: 1px solid var(--border); padding: 10px 14px;
    }
    .site-nav.is-open { display: flex; }
    .header-inner { position: relative; flex-wrap: wrap; }
    .nav-link { border-radius: 10px; }
    .pref-bar { order: 3; width: 100%; padding-bottom: 8px; }
    .pref-select { max-width: none; flex: 1; }
    .pref { flex: 1; }
}
@media (max-width: 520px) {
    body { font-size: 15.5px; }
    .wrap { padding: 0 13px; }
    .card, .article, .hero, .post-card { padding: 16px; }
    .hero { padding: 26px 18px; }
    .brand-text em { display: none; }
    .footer-inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

/* v1.3.0 交互动画总开关：后台「阅读体验 → 交互动画」关闭后，全站不再有过渡与动画 */
html[data-anim="off"] *,
html[data-anim="off"] *::before,
html[data-anim="off"] *::after {
    animation: none !important;
    transition: none !important;
}