/* cf-forum 主题样式 */
:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e5e8ef;
  --text: #1d2129;
  --muted: #8a919f;
  --accent: #3370ff;
  --accent-weak: #eaf1ff;
  --accent-text: #1f5ce8;
  --danger: #f53f3f;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 6px rgba(16, 24, 40, 0.04);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; border-radius: 8px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 16px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { font-size: 20px; font-weight: 800; letter-spacing: -0.2px; }
.logo span { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 10px; }

.nav-user { position: relative; display: flex; align-items: center; gap: 8px; cursor: default; }
.nav-name { font-size: 14px; font-weight: 600; }
.admin-badge {
  font-style: normal;
  font-size: 11px;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  padding: 1px 5px;
  margin-left: 4px;
  vertical-align: 1px;
}
.nav-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.12);
  min-width: 130px;
  padding: 6px;
  display: none;
  z-index: 60;
}
.has-menu:hover .nav-menu,
.has-menu:focus-within .nav-menu { display: block; }
.nav-menu-item {
  padding: 8px 12px;
  font-size: 13px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
}
.nav-menu-item:hover { background: var(--bg); }
.nav-menu-item.danger { color: var(--danger); }

/* ---------- 布局 ---------- */
.container { max-width: 900px; margin: 0 auto; padding: 20px 16px 80px; }

/* ---------- 版块标签栏 ---------- */
.board-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.board-tab {
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.board-tab:hover { color: var(--accent-text); border-color: var(--accent); }
.board-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.list-head h1 { font-size: 19px; font-weight: 700; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  background: var(--card);
  color: var(--text);
  border-color: var(--border);
  font-family: inherit;
}
.btn:hover { border-color: var(--accent); color: var(--accent-text); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #2962e0; color: #fff; border-color: #2962e0; }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn-danger { color: var(--danger); border-color: #ffd7d7; }
.btn-danger:hover { background: #fff2f2; color: var(--danger); border-color: var(--danger); }

/* ---------- 帖子列表 ---------- */
.thread-list { display: flex; flex-direction: column; gap: 10px; }
.thread-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  transition: box-shadow 0.15s, transform 0.15s;
}
.thread-card:hover { box-shadow: 0 4px 16px rgba(16, 24, 40, 0.08); transform: translateY(-1px); }
.thread-main { min-width: 0; flex: 1; }
.thread-title {
  font-size: 16px;
  font-weight: 600;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.thread-title:hover { color: var(--accent-text); }
.thread-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
}
.badge {
  background: var(--accent-weak);
  color: var(--accent-text);
  font-size: 12px;
  border-radius: 6px;
  padding: 1px 8px;
  font-weight: 600;
}
.thread-stats { display: flex; gap: 16px; color: var(--muted); font-size: 13px; white-space: nowrap; }
.thread-stats b { color: var(--text); font-weight: 600; }

.empty { text-align: center; color: var(--muted); padding: 60px 0; font-size: 14px; }

/* ---------- 分页 ---------- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.page-btn {
  min-width: 36px;
  padding: 6px 12px;
  text-align: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
}
.page-btn:hover:not(.disabled):not(.active) { color: var(--accent-text); border-color: var(--accent); }
.page-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.page-btn.disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- 帖子详情 ---------- */
.back-link { display: inline-block; margin-bottom: 14px; font-size: 13px; color: var(--muted); }
.back-link:hover { color: var(--accent-text); }

.thread-view {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 26px;
}
.thread-view h1 { font-size: 23px; line-height: 1.4; margin-bottom: 10px; word-break: break-word; }
.thread-byline {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
}
.thread-byline .author { display: flex; align-items: center; gap: 8px; color: var(--text); font-weight: 600; }
.thread-content { padding-top: 20px; font-size: 15px; word-break: break-word; }
.thread-content img { display: block; margin: 12px 0; max-height: 480px; }
.thread-content code {
  background: #f2f3f5;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 13px;
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
}

.avatar {
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  vertical-align: middle;
}
.avatar-text {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border-radius: 50%;
  user-select: none;
}

/* ---------- 回复 ---------- */
.reply-section { margin-top: 22px; }
.reply-section h2 { font-size: 16px; margin-bottom: 12px; }
.reply-list { display: flex; flex-direction: column; gap: 10px; }
.reply-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.reply-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
}
.reply-head .author { color: var(--text); font-weight: 600; display: flex; align-items: center; gap: 8px; }
.reply-content { font-size: 14.5px; word-break: break-word; }
.reply-content img { max-height: 360px; margin: 8px 0; }
.reply-ops { margin-left: auto; }

/* ---------- 表单 ---------- */
.form-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px 30px;
  max-width: 560px;
  margin: 30px auto 0;
}
.form-card.wide { max-width: 760px; }
.form-card h1 { font-size: 20px; margin-bottom: 20px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 6px; color: #4e5969; }
.field input[type="text"],
.field input[type="password"],
.field textarea,
.field select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14.5px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(51, 112, 255, 0.12);
}
.field textarea { resize: vertical; min-height: 160px; line-height: 1.7; }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 5px; }

.toolbar { display: flex; gap: 8px; margin: 8px 0; }
.toolbar .btn { padding: 6px 14px; font-size: 13px; }

.msg { font-size: 13.5px; border-radius: 8px; padding: 10px 14px; margin-bottom: 14px; }
.msg.err { background: #fff2f2; color: var(--danger); }
.msg.ok { background: #e8ffea; color: #00b42a; }

.form-actions { display: flex; gap: 10px; margin-top: 6px; }

/* ---------- 登录页 ---------- */
.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 22px; }
.tab {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tab.active { color: var(--accent-text); border-bottom-color: var(--accent); }

/* ---------- 提示 ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 42px;
  transform: translateX(-50%) translateY(20px);
  background: rgba(29, 33, 41, 0.92);
  color: #fff;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 10px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s;
  z-index: 100;
  max-width: 80vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: rgba(214, 69, 69, 0.95); }

/* ---------- 页脚 ---------- */
.footer { text-align: center; color: var(--muted); font-size: 12.5px; padding: 30px 0 20px; }
.footer a { color: var(--muted); text-decoration: underline; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .container { padding: 14px 12px 60px; }
  .thread-card { padding: 12px 14px; }
  .thread-stats { display: none; }
  .thread-view { padding: 18px 16px; }
  .thread-view h1 { font-size: 19px; }
  .form-card { padding: 20px 16px; margin-top: 16px; }
  .list-head h1 { font-size: 17px; }
}