/* ============================================
   share.css — 墨记分享页 v3
   ============================================ */

:root {
  --primary: #4F46E5;
  --primary-light: #EEF2FF;
  --primary-hover: #6366F1;
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);
  --shadow: 0 4px 16px rgba(15, 23, 42, .06);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, .1);
  --transition: all .2s cubic-bezier(.4, 0, .2, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
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);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  animation: pageIn .35s cubic-bezier(.4, 0, .2, 1);
}
@keyframes pageIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- 顶栏 ---- */
.share-top {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px; padding: 0 24px;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #fff; font-weight: 800; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 3px 10px rgba(79, 70, 229, .3);
}
.brand span { font-size: 14px; font-weight: 600; color: var(--text); }
.top-actions { display: flex; gap: 6px; align-items: center; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 32px; padding: 0 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--card); color: var(--text-secondary);
  font-size: 12.5px; font-weight: 500; cursor: pointer;
  text-decoration: none; transition: var(--transition);
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); text-decoration: none; color: var(--text); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-hover); color: #fff; }
.btn-toc { background: var(--primary-light); border-color: transparent; color: var(--primary); font-weight: 600; }
.btn-toc:hover { background: var(--primary); color: #fff; }

/* ---- 布局 ---- */
.share-layout {
  display: flex; max-width: 1100px; margin: 0 auto;
  padding: 28px 24px 60px; gap: 32px;
  align-items: flex-start;
}
.share-main {
  flex: 1; min-width: 0;
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  box-shadow: var(--shadow-sm);
  animation: contentIn .4s cubic-bezier(.4, 0, .2, 1);
}
@keyframes contentIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.share-title {
  margin: 0 0 12px; font-size: 28px; font-weight: 800;
  color: var(--text); letter-spacing: -.5px; line-height: 1.3;
}
.share-meta {
  display: flex; gap: 16px; font-size: 13px; color: var(--text-muted);
  margin-bottom: 28px; padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}
.share-body { font-size: 15.5px; line-height: 1.8; }

/* ---- 目录侧边栏 ---- */
.toc-sidebar {
  width: 220px; flex-shrink: 0; position: sticky; top: 80px;
  max-height: calc(100vh - 100px); overflow-y: auto;
  background: var(--card); border: 1px solid var(--border-light);
  border-radius: var(--radius); padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.toc-sidebar.collapsed { transform: translateX(20px); opacity: 0; pointer-events: none; }
.toc-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px; padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}
.toc-head span:first-child {
  font-size: 12px; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 1px;
}
.toc-close {
  width: 22px; height: 22px; border: none; background: transparent;
  color: var(--text-muted); font-size: 16px; cursor: pointer;
  border-radius: 5px; transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.toc-close:hover { background: var(--bg); color: var(--text); }
.toc-nav { display: flex; flex-direction: column; gap: 1px; }
.toc-nav a {
  display: block; padding: 6px 10px; border-radius: 6px;
  font-size: 13px; color: var(--text-muted); text-decoration: none;
  transition: var(--transition); line-height: 1.4;
  border-left: 2px solid transparent;
}
.toc-nav a:hover { background: var(--bg); color: var(--text); text-decoration: none; }
.toc-nav a.active {
  color: var(--primary); font-weight: 600;
  background: var(--primary-light);
  border-left-color: var(--primary);
}
.toc-nav a.level-2 { padding-left: 10px; }
.toc-nav a.level-3 { padding-left: 22px; font-size: 12.5px; }
.toc-nav a.level-4 { padding-left: 34px; font-size: 12px; }
.toc-mask { display: none; }

/* ---- 密码门 ---- */
.gate {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.gate-card {
  width: 380px; max-width: 90vw; text-align: center;
  background: var(--card); border: 1px solid var(--border-light);
  border-radius: 20px; padding: 40px 32px;
  box-shadow: var(--shadow-lg);
  animation: cardIn .4s cubic-bezier(.4, 0, .2, 1);
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px) scale(.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.lock { font-size: 44px; margin-bottom: 14px; }
.gate-card h2 { margin: 0 0 8px; font-size: 20px; font-weight: 800; color: var(--text); }
.gate-card p { margin: 0 0 22px; font-size: 14px; color: var(--text-muted); }
.gate-card input {
  width: 100%; height: 44px; padding: 0 16px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; outline: none; text-align: center;
  font-family: inherit; margin-bottom: 14px;
  background: var(--bg); transition: var(--transition);
}
.gate-card input:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(79, 70, 229, .1); }
.gate-card button {
  width: 100%; height: 42px; border: none; border-radius: var(--radius-sm);
  background: var(--primary); color: #fff; font-size: 14.5px; font-weight: 700;
  cursor: pointer; font-family: inherit;
  box-shadow: 0 3px 10px rgba(79, 70, 229, .3);
  transition: var(--transition);
}
.gate-card button:hover { background: var(--primary-hover); transform: translateY(-1px); }
.gate-err { color: #EF4444; font-size: 13px; margin-top: 10px; min-height: 18px; font-weight: 500; }

/* ---- 过期提示 ---- */
.expired {
  text-align: center; padding: 80px 24px;
}
.expired .big { font-size: 56px; margin-bottom: 16px; }
.expired h2 { margin: 0 0 8px; font-size: 22px; font-weight: 800; color: var(--text); }
.expired p { margin: 0 0 24px; color: var(--text-muted); font-size: 14.5px; }

/* ---- 暗色主题 ---- */
[data-theme="dark"] {
  --bg: #0F172A;
  --card: #1E293B;
  --text: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-muted: #64748B;
  --border: #334155;
  --border-light: #293548;
  --primary-light: rgba(79, 70, 229, .2);
}
[data-theme="dark"] body { background: var(--bg); }
[data-theme="dark"] .share-top { background: rgba(30, 41, 59, .88); }
[data-theme="dark"] .share-main { background: var(--card); }
[data-theme="dark"] .toc-sidebar { background: var(--card); }
[data-theme="dark"] .toc-nav a:hover { background: var(--bg); }
[data-theme="dark"] .btn { background: var(--card); border-color: var(--border); color: var(--text-secondary); }
[data-theme="dark"] .btn:hover { color: var(--text); }
[data-theme="dark"] .toast { background: #F1F5F9; color: #0F172A; box-shadow: 0 10px 30px rgba(0, 0, 0, .5); }
[data-theme="dark"] .gate { background: var(--bg); }
[data-theme="dark"] .gate-card { background: var(--card); }
[data-theme="dark"] .gate-card input { background: var(--bg); border-color: var(--border); color: var(--text); }

/* ---- 响应式 ---- */
@media (max-width: 900px) {
  .toc-sidebar {
    position: fixed; top: 0; right: 0; bottom: 0;
    width: 280px; max-height: none; z-index: 200;
    border-radius: 0; transform: translateX(100%);
    box-shadow: var(--shadow-lg);
  }
  .toc-sidebar.open { transform: translateX(0); }
  .toc-mask {
    display: block; position: fixed; inset: 0;
    background: rgba(15, 23, 42, .5); z-index: 150;
    opacity: 0; visibility: hidden; transition: var(--transition);
  }
  .toc-mask.show { opacity: 1; visibility: visible; }
  .share-layout { padding: 20px 16px 48px; }
  .share-main { padding: 28px 22px; }
}
@media (max-width: 640px) {
  .share-top { padding: 0 14px; height: 50px; }
  .brand span { display: none; }
  .share-main { padding: 24px 18px; border-radius: var(--radius); }
  .share-title { font-size: 22px; }
  .share-body { font-size: 14.5px; }
  .site-foot { padding: 18px 16px 26px; }
}

/* ---- 页脚（简言社区风格：© 年份 站名 · 基于XX自研XX · 版本号） ---- */
.site-foot {
  max-width: 1100px; margin: 0 auto;
  padding: 22px 24px 34px; text-align: center;
  border-top: 1px solid var(--border-light);
  font-size: 12.5px; color: var(--text-muted);
  letter-spacing: .3px;
}
.site-foot-links { margin-top: 8px; font-size: 12.5px; }
.site-foot-links a { color: var(--text-muted); text-decoration: none; transition: var(--transition); }
.site-foot-links a:hover { color: var(--primary); text-decoration: underline; }
.foot-dot { margin: 0 8px; color: var(--border); }

/* ---- 空状态/未找到 ---- */
.empty-state {
  text-align: center; padding: 80px 24px;
  max-width: 500px; margin: 60px auto;
}
.empty-state .big { font-size: 56px; margin-bottom: 16px; }
.empty-state h1 { margin: 0 0 8px; font-size: 22px; font-weight: 800; color: var(--text); }
.empty-state p { margin: 0 0 24px; color: var(--text-muted); font-size: 14.5px; }

/* ---- Toast ---- */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
  padding: 11px 22px; background: var(--text); color: #fff;
  border-radius: 10px; font-size: 13.5px; font-weight: 500;
  box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden;
  transition: var(--transition); z-index: 300;
}
.toast.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }