/* ================================================================
   Flower Stream — style.css v3
   调色意象：山溪边的落花，宣纸，淡墨，雨后苔痕
   ================================================================ */

:root {
  /* 主色：烟霞紫玫，像落在溪面的花瓣 */
  --accent:      #a07080;
  --accent-h:    #7d5562;
  --accent-pale: #f5ecee;   /* 极淡的花色，用于高亮背景 */

  /* 底色系 */
  --bg:          #faf9f7;   /* 宣纸白，有温度 */
  --surface:     #f2ede8;   /* 淡米，次级背景 */
  --border:      #e6ddd5;   /* 柔边线 */

  /* 文字系 */
  --text:        #26201c;   /* 深墨 */
  --text-2:      #7a6e68;   /* 次级 */
  --text-3:      #b8aaa2;   /* 三级/占位 */

  --radius:      4px;
  --header-h:    52px;
  --max-w:       680px;     /* 比上版再窄一点，更聚焦 */
  --trans:       .22s ease;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei',
               'Noto Serif SC', Georgia, serif;
  font-size: 16px;
  line-height: 1.88;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--trans); }
a:hover { color: var(--accent-h); }
img { max-width: 100%; height: auto; display: block; }

/* ── Layout ─────────────────────────────────────────────── */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 22px; }
#main-wrap {
  padding-top: calc(var(--header-h) + 52px);
  padding-bottom: 88px;
  min-height: 80vh;
}

/* ── Header ─────────────────────────────────────────────── */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(250,249,247,.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: transform .3s ease;
  will-change: transform;
}
#site-header.hidden { transform: translateY(-100%); }

.header-inner { display: flex; align-items: center; gap: 14px; height: 100%; }

/* 站点名称：低调优雅，下划线悬浮动画 */
.site-brand {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: .6px;
  white-space: nowrap;
  position: relative;
  padding-bottom: 1px;
}
.site-brand::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.site-brand:hover { color: var(--text); }
.site-brand:hover::after { transform: scaleX(1); }

.site-tagline {
  font-size: .75rem;
  color: var(--text-3);
  font-style: italic;
  white-space: nowrap;
  letter-spacing: .2px;
}
@media (max-width: 480px) { .site-tagline { display: none; } }

.site-nav { display: flex; align-items: center; gap: 0; margin-left: auto; }
.site-nav a {
  padding: 4px 9px;
  font-size: .85rem;
  color: var(--text-2);
  border-radius: var(--radius);
  transition: color var(--trans), background var(--trans);
}
.site-nav a:hover { color: var(--accent); background: var(--accent-pale); }

.nav-search input {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3px 11px;
  font-size: .8rem;
  width: 100px;
  outline: none;
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  transition: width var(--trans), border-color var(--trans);
}
.nav-search input:focus { width: 148px; border-color: var(--accent); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer;
  padding: 4px; margin-left: auto;
}
.nav-toggle span { display: block; width: 20px; height: 1.5px; background: var(--text-2); border-radius: 2px; }

@media (max-width: 580px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: flex-start;
    padding: 8px 22px 14px; gap: 0;
    box-shadow: 0 8px 24px rgba(0,0,0,.06);
  }
  .site-nav.open { display: flex; }
  .site-nav a { width: 100%; padding: 9px 0; border-radius: 0; border-bottom: 1px solid var(--border); }
  .site-nav a:last-child { border-bottom: none; }
  .nav-search { width: 100%; padding: 10px 0 2px; }
  .nav-search input { width: 100% !important; }
}

/* ── 首页文章卡片 ─────────────────────────────────────── */
#post-list { display: flex; flex-direction: column; }

.post-card {
  padding: 38px 0;
  border-bottom: 1px solid var(--border);
  transition: opacity .4s, transform .4s;
}
.post-card:first-child { padding-top: 0; }
.post-card:last-child { border-bottom: none; }

/* 缩略图 */
.post-thumb { display: block; margin-bottom: 18px; border-radius: var(--radius); overflow: hidden; }
.post-thumb img {
  width: 100%; max-height: 260px; object-fit: cover;
  transition: transform .5s ease, filter .5s ease;
  filter: saturate(.85) brightness(.98);
}
.post-thumb:hover img { transform: scale(1.02); filter: saturate(1); }

/* 标题 */
.post-title {
  font-size: 1.15rem; font-weight: 600;
  line-height: 1.5; margin-bottom: 7px; letter-spacing: .15px;
}
.post-title a { color: var(--text); }
.post-title a:hover { color: var(--accent); }

/* meta：极细小字 */
.post-meta {
  font-size: .76rem; color: var(--text-3);
  margin-bottom: 13px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 5px;
  letter-spacing: .4px;
}
.post-meta a { color: var(--text-3); }
.post-meta a:hover { color: var(--accent); }
.post-meta .sep { color: var(--border); }

/* 摘要 */
.post-excerpt {
  font-size: .91rem; color: var(--text-2);
  line-height: 1.82; margin-bottom: 13px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 阅读全文：极低调，像翻书的手势 */
.read-more {
  font-size: .75rem; color: var(--text-3);
  letter-spacing: .8px;
}
.read-more:hover { color: var(--accent); }

/* 新文章进入动画 */
.post-card.entering { opacity: 0; transform: translateY(10px); }

/* ── 无限滚动状态 ─────────────────────────────────────── */
#load-status {
  text-align: center; padding: 38px 0 6px;
  color: var(--text-3); font-size: .78rem; letter-spacing: .8px;
}
.spinner {
  display: inline-block; width: 15px; height: 15px;
  border: 1.5px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  vertical-align: middle; margin-right: 5px;
}
.end-mark { font-style: italic; }
@keyframes spin { to { transform: rotate(360deg); } }
.page-navigator { display: none !important; }

/* ── 单篇文章 ─────────────────────────────────────────── */
.post-single { margin-bottom: 60px; }
.post-single .post-header {
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.post-single .post-title {
  font-size: 1.62rem; line-height: 1.38;
  margin-bottom: 14px; letter-spacing: -.15px;
}

/* 文章正文 */
.post-content {
  font-size: .96rem; line-height: 1.95; color: #2a2420;
}
.post-content h2, .post-content h3, .post-content h4 {
  margin: 1.9em 0 .65em; line-height: 1.4; font-weight: 600;
}
.post-content h2 { font-size: 1.22rem; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.post-content h3 { font-size: 1.06rem; }
.post-content p { margin-bottom: 1.15em; }
.post-content ul, .post-content ol { padding-left: 1.5em; margin-bottom: 1em; }
.post-content li { margin-bottom: .4em; }
.post-content blockquote {
  border-left: 2px solid var(--accent);
  margin: 1.4em 0; padding: .6em 1.1em;
  color: var(--text-2); background: var(--accent-pale);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
}
.post-content code {
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  font-size: .85em; background: var(--surface);
  border: 1px solid var(--border); border-radius: 3px; padding: 1px 5px;
}
.post-content pre {
  background: #1c1814; color: #e8ddd4;
  border-radius: var(--radius); padding: 18px;
  overflow-x: auto; margin-bottom: 1.3em;
  font-size: .85em; line-height: 1.65;
}
.post-content pre code { background: none; border: none; padding: 0; color: inherit; }
.post-content img { border-radius: var(--radius); margin: 1.2em auto; }
.post-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 30%, transparent);
  text-underline-offset: 2px;
}
.post-content a:hover { text-decoration-color: var(--accent); }
.post-content hr { border: none; border-top: 1px solid var(--border); margin: 2.2em 0; }
.post-content table { width: 100%; border-collapse: collapse; margin-bottom: 1.3em; font-size: .88em; }
.post-content th, .post-content td { border: 1px solid var(--border); padding: 8px 12px; }
.post-content th { background: var(--surface); font-weight: 600; }
.post-content tr:nth-child(even) td { background: #faf7f5; }

/* ── 评论 ─────────────────────────────────────────────── */
.comments-wrap { margin-top: 56px; padding-top: 38px; border-top: 1px solid var(--border); }
.comments-title {
  font-size: .9rem; font-weight: 600;
  color: var(--text-3); margin-bottom: 28px;
  letter-spacing: .8px; text-transform: none;
}

.comments-list { list-style: none; display: flex; flex-direction: column; gap: 26px; margin-bottom: 44px; }
.comment-item { display: flex; gap: 13px; }
.comment-avatar img { width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0; filter: saturate(.75); }
.comment-main { flex: 1; min-width: 0; }
.comment-meta {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 8px; margin-bottom: 5px; font-size: .76rem; color: var(--text-3);
}
.comment-author { font-weight: 600; color: var(--text-2); font-size: .8rem; }
.comment-reply { margin-left: auto; color: var(--text-3); font-size: .72rem; cursor: pointer; }
.comment-reply:hover { color: var(--accent); }
.comment-content { font-size: .9rem; line-height: 1.78; color: var(--text); }
.by-author .comment-author::after {
  content: '作者'; font-size: .62rem; font-weight: 400;
  background: var(--accent); color: #fff;
  padding: 1px 4px; border-radius: 2px; margin-left: 5px; vertical-align: middle;
}

/* 评论表单 */
.comment-form-wrap { margin-top: 6px; }
#comment-form .form-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 10px; margin-bottom: 10px;
}
#comment-form .form-row .full { grid-column: 1 / -1; }
@media (max-width: 460px) { #comment-form .form-row { grid-template-columns: 1fr; } }

#comment-form input[type="text"],
#comment-form input[type="email"],
#comment-form input[type="url"],
#comment-form textarea {
  width: 100%; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 9px 11px;
  font-size: .88rem; font-family: inherit;
  outline: none; background: var(--bg); color: var(--text);
  transition: border-color var(--trans), background var(--trans);
}
#comment-form input:focus, #comment-form textarea:focus {
  border-color: var(--accent); background: #fff;
}
#comment-form textarea { resize: vertical; margin-bottom: 10px; min-height: 105px; }

.form-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
#reply-tip { font-size: .76rem; color: var(--text-3); flex: 1; font-style: italic; }
#cancel-reply { font-size: .73rem; color: var(--text-3); cursor: pointer; text-decoration: underline; }
#cancel-reply:hover { color: var(--accent); }

#submit-btn {
  background: var(--accent); color: #fff; border: none;
  border-radius: var(--radius); padding: 8px 20px;
  font-size: .86rem; font-weight: 600; font-family: inherit;
  cursor: pointer; letter-spacing: .3px;
  transition: background var(--trans), transform .1s;
}
#submit-btn:hover { background: var(--accent-h); }
#submit-btn:active { transform: scale(.97); }
#submit-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* 提交反馈消息 */
.comment-msg {
  font-size: .83rem; border-radius: var(--radius);
  padding: 9px 13px; margin-bottom: 13px; display: none;
}
.comment-msg.success {
  display: block; background: #f2f7f2;
  color: #3d6e3d; border: 1px solid #bdd6bd;
}
.comment-msg.error {
  display: block; background: #faf2f2;
  color: #7a3535; border: 1px solid #dbbdbd;
}
.comment-closed { color: var(--text-3); font-style: italic; font-size: .86rem; }

/* ── Footer ─────────────────────────────────────────────── */
#site-footer { border-top: 1px solid var(--border); padding: 30px 0; margin-top: 0; }
.footer-inner {
  text-align: center; font-size: .76rem; color: var(--text-3); letter-spacing: .4px;
}
.footer-inner a { color: var(--text-3); }
.footer-inner a:hover { color: var(--accent); }
.footer-inner p + p { margin-top: 5px; }

/* ── 回到顶部 ───────────────────────────────────────────── */
#back-top {
  position: fixed; bottom: 28px; right: 24px;
  width: 34px; height: 34px;
  background: var(--surface); color: var(--text-2);
  border: 1px solid var(--border); border-radius: 50%;
  font-size: .82rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: translateY(8px);
  transition: opacity .25s, transform .25s, background var(--trans), color var(--trans), border-color var(--trans);
  pointer-events: none; z-index: 90;
}
#back-top.visible { opacity: 1; transform: none; pointer-events: auto; }
#back-top:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── 404 ────────────────────────────────────────────────── */
.error-page { text-align: center; padding: 100px 0; }
.error-page h1 { font-size: 5rem; color: var(--border); font-weight: 900; line-height: 1; margin-bottom: 14px; }
.error-page p { color: var(--text-2); margin-bottom: 24px; font-style: italic; }

/* ── 响应式 ─────────────────────────────────────────────── */
@media (max-width: 460px) {
  .post-title { font-size: 1.05rem; }
  .post-single .post-title { font-size: 1.32rem; }
  #back-top { bottom: 16px; right: 14px; }
}