/* ============================================================
   main.css - 全站共用基础样式
   包含: CSS变量、全局样式、导航栏、容器、卡片、表单、按钮、
         编辑器、Markdown、评论、Footer、响应式等所有页面共用的样式
   ============================================================ */

/* ── CSS 变量 ── */
:root {
  --bg:        #0d0f1a;
  --bg2:       #13162a;
  --card:      #1a1d35;
  --border:    #2a2f55;
  --cyan:      #00e5ff;
  --cyan-dim:  #00b8cc;
  --purple:    #7c4dff;
  --purple-dim:#5c35cc;
  --text:      #e8eaf6;
  --text-dim:  #8892b0;
  --radius:    12px;
}

/* ── Reset & 全局 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { text-decoration: none; color: inherit; }

/* ── 导航（旧版兼容） ── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 15, 26, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { font-size: 1.3rem; font-weight: 700; color: var(--cyan); letter-spacing: 2px; }
.logo span { color: var(--text); }
nav { display: flex; gap: 8px; align-items: center; }
nav a { padding: 8px 16px; border-radius: 6px; color: var(--text-dim); transition: 0.2s; font-size: 0.9rem; }
nav a:hover { background: var(--border); color: var(--text); }

/* ── 按钮 ── */
.btn-primary {
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--purple), var(--cyan-dim));
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  display: inline-block;
}
.btn-primary:hover { opacity: 0.9; }
.btn { padding: 10px 24px; border: none; border-radius: 8px; font-size: 0.95rem; cursor: pointer; transition: 0.2s; }
.btn-success { background: var(--cyan); color: var(--bg); font-weight: 600; }
.btn-success:hover { background: var(--cyan-dim); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #3a3f65; }
.btn-danger { background: #ff4757; color: #fff; }
.btn-danger:hover { opacity: 0.9; }

/* ── 容器 & 卡片 ── */
.container { max-width: 900px; margin: 0 auto; padding: 40px 24px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: var(--purple); transform: translateY(-2px); }
.card h2 { font-size: 1.3rem; margin-bottom: 8px; color: var(--text); }
.card h2 a:hover { color: var(--cyan); }
.card .meta { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 12px; }
.card .summary { color: var(--text-dim); font-size: 0.95rem; }

/* ── 表单 ── */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; color: var(--text-dim); font-size: 0.9rem; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--cyan);
}
.form-group textarea { min-height: 200px; resize: vertical; }

/* ── 面包屑导航（Blog/Article/Editor 共用） ── */
.breadcrumb { margin-bottom: 20px; font-size: 0.9rem; }
.breadcrumb a { color: var(--cyan); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text-dim); margin: 0 8px; }

/* ── 编辑器样式 ── */
.editor-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.editor-header h1 { font-size: 1.3rem; }
.header-actions { display: flex; gap: 12px; align-items: center; }
.preview-header { font-size: 0.9rem; color: var(--text-dim); margin-bottom: 12px; }
.editor-container { display: flex; gap: 20px; height: 60vh; }
.editor-pane, .preview-pane { flex: 1; display: flex; flex-direction: column; }
.editor-pane textarea {
  flex: 1;
  padding: 16px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.95rem;
  resize: none;
}
.preview-pane {
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-y: auto;
}

/* 格式工具栏 */
.format-toolbar {
  display: flex;
  gap: 4px;
  padding: 8px 12px;
  background: var(--bg2);
  border-radius: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.format-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--card);
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.format-btn:hover { background: var(--border); }
.format-btn:active { transform: scale(0.95); }
.toolbar-separator {
  width: 1px;
  height: 24px;
  background: var(--border);
  margin: 6px 8px;
}

/* ── Markdown 样式 ── */
.markdown-body { color: var(--text); line-height: 1.8; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin: 1em 0 0.5em; color: var(--text); }
.markdown-body h1 { font-size: 1.8rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3em; }
.markdown-body h2 { font-size: 1.5rem; }
.markdown-body h3 { font-size: 1.2rem; }
.markdown-body p { margin: 1em 0; }
.markdown-body code { background: var(--bg2); padding: 2px 6px; border-radius: 4px; font-family: monospace; }
.markdown-body pre { background: var(--bg2); padding: 16px; border-radius: 8px; overflow-x: auto; }
.markdown-body pre code { background: none; padding: 0; }
.markdown-body blockquote { border-left: 4px solid var(--purple); padding-left: 16px; color: var(--text-dim); margin: 1em 0; }
.markdown-body ul, .markdown-body ol { margin: 1em 0; padding-left: 2em; }
.markdown-body li { margin: 0.3em 0; }
.markdown-body a { color: var(--cyan); }
.markdown-body img { max-width: 100%; border-radius: 8px; }
.markdown-body table { border-collapse: collapse; width: 100%; margin: 1em 0; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 8px 12px; }
.markdown-body th { background: var(--bg2); }

/* ── 评论 ── */
.comments { margin-top: 40px; }
.comments h3 { margin-bottom: 20px; color: var(--text-dim); }
.comment-item { padding: 16px; background: var(--bg2); border-radius: 8px; margin-bottom: 12px; }
.comment-item .author { font-weight: 600; color: var(--cyan); margin-bottom: 4px; }
.comment-item .time { font-size: 0.75rem; color: var(--text-dim); }
.comment-item .content { margin-top: 8px; }
.comment-item .reply-btn { font-size: 0.8rem; color: var(--text-dim); cursor: pointer; margin-top: 8px; display: inline-block; }
.comment-item .reply-btn:hover { color: var(--cyan); }
.comment-form { margin-top: 20px; }
.comment-form input { width: 200px; margin-right: 12px; }
.comment-reply { margin-left: 40px; padding-left: 16px; border-left: 2px solid var(--border); margin-top: 12px; }

/* ── 文章详情页样式 ── */
.article-header { margin-bottom: 32px; }
.article-header h1 { font-size: 2rem; margin-bottom: 12px; line-height: 1.3; }
.article-meta { color: var(--text-dim); font-size: 0.9rem; display: flex; gap: 16px; align-items: center; }
.article-content { font-size: 1.05rem; line-height: 1.8; }
.edit-link { color: var(--cyan); font-size: 0.85rem; }
.edit-btn { display: inline-block; margin-left: 16px; padding: 4px 12px; background: var(--cyan); color: #fff; border-radius: 4px; font-size: 0.85rem; }
.edit-btn:hover { opacity: 0.9; }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 24px 32px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  line-height: 1.8;
  margin-top: auto;
}
footer a { color: var(--text-dim); transition: color 0.2s; }
footer a:hover { color: var(--cyan); }

/* ============================================================
   全站统一导航栏 (navbar.js 配套样式)
   ============================================================ */
#site-header { position: sticky; top: 0; z-index: 200; }
#site-header header {
  height: 60px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(13, 15, 26, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: relative;
}
#site-header .logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 2px;
  text-shadow: 0 0 14px rgba(0,229,255,0.45);
  flex-shrink: 0;
}
#site-header .logo span { color: var(--text); }

/* 桌面端导航 */
.nav-desktop { display: flex; align-items: center; gap: 4px; }
.nav-desktop a {
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav-desktop a:hover, .nav-desktop a.nav-active { color: var(--text); background: var(--border); }
.nav-desktop a.nav-active { color: var(--cyan); background: rgba(0,229,255,0.08); }
.nav-divider { width: 1px; height: 20px; background: var(--border); margin: 0 8px; flex-shrink: 0; }

/* 用户区域 */
.nav-user-area { display: flex; align-items: center; gap: 8px; }
.nav-btn {
  padding: 7px 16px;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 500;
  transition: 0.2s;
  white-space: nowrap;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
}
.nav-btn-login { border: 1px solid var(--cyan) !important; color: var(--cyan) !important; background: transparent; }
.nav-btn-login:hover { background: rgba(0,229,255,0.1) !important; box-shadow: 0 0 10px rgba(0,229,255,0.2); }
.nav-btn-write { background: linear-gradient(135deg, var(--purple), var(--cyan-dim)); color: #fff !important; font-weight: 600; }
.nav-btn-write:hover { opacity: 0.88; transform: translateY(-1px); }
.nav-btn-logout { color: #ff6b81 !important; background: rgba(255,107,129,0.08); }
.nav-btn-logout:hover { background: rgba(255,107,129,0.16) !important; }

/* 用户信息 Chip */
.nav-user-chip {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px 5px 6px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: border-color 0.2s, background 0.2s;
  user-select: none;
}
.nav-user-chip:hover { border-color: var(--cyan-dim); background: rgba(0,229,255,0.05); }
.nav-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border); flex-shrink: 0; }
.nav-avatar-placeholder {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--purple), var(--cyan-dim));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-nickname { font-size: 0.88rem; color: var(--text); max-width: 80px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-chip-arrow { font-size: 0.7rem; color: var(--text-dim); transition: transform 0.2s; }
.nav-user-chip:hover .nav-chip-arrow { transform: rotate(180deg); }

/* 下拉菜单 */
.nav-dropdown { display: none; position: absolute; top: calc(100% + 8px); right: 0; min-width: 150px; background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 6px; box-shadow: 0 8px 32px rgba(0,0,0,0.4); z-index: 300; }
.nav-dropdown.open { display: block; }
.nav-dropdown a { display: block; padding: 9px 14px; border-radius: 6px; font-size: 0.88rem; color: var(--text-dim); transition: 0.15s; }
.nav-dropdown a:hover { background: var(--border); color: var(--text); }

/* 汉堡按钮 */
.nav-hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; border-radius: 6px; transition: background 0.2s; }
.nav-hamburger:hover { background: var(--border); }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.25s; transform-origin: center; }
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端展开菜单 */
.nav-mobile { display: none; flex-direction: column; gap: 4px; padding: 12px 16px 16px; background: var(--bg2); border-bottom: 1px solid var(--border); position: relative; z-index: 199; }
.nav-mobile.open { display: flex; }
.nav-mobile a { padding: 11px 14px; border-radius: 8px; font-size: 0.95rem; color: var(--text-dim); transition: 0.15s; }
.nav-mobile a:hover, .nav-mobile a.nav-active { background: var(--border); color: var(--text); }
.nav-mobile a.nav-active { color: var(--cyan); background: rgba(0,229,255,0.08); }
.nav-mobile-user { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; padding-top: 10px; border-top: 1px solid var(--border); }
.nav-user-info { display: flex; align-items: center; gap: 10px; padding: 8px 14px; color: var(--text); font-size: 0.95rem; }

/* ── 响应式 ── */
@media (max-width: 768px) {
  #site-header header { padding: 0 16px; }
  .nav-desktop { display: none; }
  .nav-hamburger { display: flex; }
}
@media (min-width: 769px) {
  .nav-mobile { display: none !important; }
}
@media (max-width: 640px) {
  header { padding: 0 16px; }
  .container { padding: 24px 16px; }
  .editor-container { flex-direction: column; height: auto; }
  .editor-pane textarea { min-height: 300px; }
  footer { padding: 20px 16px; }
}