/* 亮暗双主题 CSS 变量（GitHub 风格，极简） */
:root {
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --text: #1f2328;
  --muted: #57606a;
  --border: #d0d7de;
  --accent: #2f6feb;
}
[data-theme="dark"] {
  --bg: #0d1117;
  --card-bg: #161b22;
  --text: #e6edf3;
  --muted: #8b949e;
  --border: #30363d;
  --accent: #539bf5;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
.muted { color: var(--muted); font-size: 0.9em; }
.center { text-align: center; }

:root { --content-max: 1550px; --landing-max: 1080px; }
.page { max-width: var(--content-max); margin: 0 auto; padding: 24px 16px; }
.page.center { display: flex; flex-direction: column; align-items: center; gap: 12px; padding-top: 12vh; }
.features { text-align: left; color: var(--muted); }
.lead { color: var(--muted); }

/* 按钮 */
.btn {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 14px;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; padding: 7px 9px; line-height: 0; }
.icon-btn svg { display: block; }

/* 卡片 */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.login-card { display: flex; flex-direction: column; gap: 12px; width: 320px; margin-top: 8px; }
.login-card label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; }
.login-card input { padding: 8px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--text); }
.link { font-size: 14px; }
.msg { font-size: 14px; }
.msg.ok { color: #1a7f37; }
.msg.err { color: #cf222e; }

/* 顶部栏 — 与 landing-nav 统一样式（同高、同边框、同背景），内容区统一 1550 居中 */
.topbar, .landing-nav {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}
.topbar {
  position: sticky; top: 0;
  z-index: 5;
  padding: 10px 16px;
}
.topbar-inner {
  max-width: var(--content-max); margin: 0 auto;
  display: flex; align-items: center; gap: 10px;
}
:root { --topbar-h: 60px; }

/* 书签列表滚动区：吸附在顶部栏下方，仅列表内部滚动 */
.scroll-area { height: calc(100vh - var(--topbar-h)); overflow-y: auto; }
.notice {
  flex: 0 0 1/3;
  width: calc(100% / 3);
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
  color: var(--muted); font-size: 14px;
}
.notice--bar { flex: none; width: 100%; }
.notice-bar {
  display: none;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 6px 16px;
  color: var(--muted); font-size: 13px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.search { flex: 1; padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--text); min-width: 0; }

/* 首页默认书签登录提示横幅 */
.login-hint {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 10px 16px; font-size: 14px; color: var(--muted);
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  flex-wrap: wrap; text-align: center;
}
.login-hint span { display: inline-flex; align-items: center; }
.login-hint .btn { flex: none; }
.login-hint-link { color: var(--text); text-decoration: none; border-bottom: 1px solid var(--accent); }
.login-hint-link:hover { opacity: .8; }

/* 用户中心：图标 + 首字母头像 + 二级菜单 */
.user-menu-wrap { position: relative; flex-shrink: 0; }
.avatar-btn {
  width: 30px; height: 30px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); background: var(--card-bg); color: var(--muted);
  cursor: pointer; padding: 0; flex-shrink: 0;
}
.avatar-btn:hover { border-color: var(--accent); color: var(--text); }
.avatar {
  width: 100%; height: 100%; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent); color: #fff; font-size: 13px; font-weight: 600; line-height: 1;
}
.user-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  min-width: 180px; max-width: 260px;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 12px 32px rgba(0,0,0,.12);
  z-index: 20; padding: 6px;
  display: flex; flex-direction: column; gap: 2px;
}
.user-menu[hidden] { display: none !important; }
.user-menu-head {
  padding: 8px 10px 6px; font-size: 12px; color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  border-bottom: 1px solid var(--border); margin: -6px -6px 4px; 
}
.user-menu-divider { height: 1px; background: var(--border); margin: 4px -6px; }
.user-menu-item {
  display: block; width: 100%; text-align: left;
  padding: 8px 10px; border-radius: 6px; border: none;
  background: transparent; color: var(--text); font-size: 13px;
  cursor: pointer; text-decoration: none; line-height: 1.4;
}
.user-menu-item:hover { background: var(--bg); }
.user-menu-item.danger { color: #cf222e; }
.user-menu-item.danger:hover { background: color-mix(in srgb, #cf222e 8%, transparent); }
#menu-import, #menu-add { display:none; }

/* 旧下拉导出（已迁入用户菜单，保留兼容） */
.dropdown { position: relative; }
.dropdown-menu {
  display: none; position: absolute; right: 0; top: 100%;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 6px;
  z-index: 10; min-width: 90px;
}
.dropdown:hover .dropdown-menu { display: flex; flex-direction: column; }
.dropdown-menu a { padding: 8px 14px; color: var(--text); font-size: 14px; }
.dropdown-menu a:hover { background: var(--bg); }

/* 导入进度 */
.import-bar { max-width: var(--content-max); margin: 12px auto 0; padding: 0 16px; color: var(--muted); font-size: 14px; }
.progress { height: 6px; background: var(--border); border-radius: 3px; margin-top: 6px; overflow: hidden; }
.progress div { height: 100%; background: var(--accent); transition: width 0.4s; }

/* 分组 */
.group { margin: 24px 0; }
.group h2 { font-size: 16px; margin: 0 0 10px; display: flex; align-items: center; gap: 6px; user-select:none; cursor:pointer; }
.group h2 .collapse-icon{ display:inline-flex; align-items:center; justify-content:center; font-size:18px; line-height:1; color:var(--muted); transition: transform .2s ease, background .15s; margin-left:auto; cursor:pointer; padding:4px 10px; border-radius:6px; user-select:none; }
.group h2 .collapse-icon:hover{ background:var(--bg); color:var(--text); }
.group.collapsed h2 .collapse-icon{ transform: rotate(-90deg); }
.group .cards{ overflow:hidden; max-height: 5000px; opacity:1; transition: max-height .32s ease, opacity .24s ease; overflow-anchor: none; will-change: max-height; }
.group.collapsed .cards{ max-height:0; opacity:0; pointer-events:none; }
.scroll-area{ overflow-anchor: none; }
.cat-edit {
  background: none; border: none; cursor: pointer;
  color: var(--muted); font-size: 13px; padding: 2px 4px; border-radius: 4px;
  opacity: 0; transition: opacity 0.15s;
}
.group h2:hover .cat-edit, .cat-edit:focus-visible { opacity: 1; }
.cat-edit:hover { color: var(--text); background: var(--bg); }
/* 响应式列数：随视口自适应，容器 1550px 内可放 6 列（6*240+5*10=1490 + 32px 边距） */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
}
.card {
  display: flex; align-items: center; gap: 6px;
  position: relative;
  min-width: 0;
  padding: 6px 10px;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 7px;
  font-size: 13px;
}
.card img { width: 18px; height: 18px; flex-shrink: 0; align-self:center; }
.card a { color: var(--text); flex: 1; display: flex; align-items: center; gap: 6px; min-width: 0; align-self:center; }
.card a span {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 13px;
  line-height: 1.3;
}
.card-actions { display: none; gap: 2px; }
.card:hover .card-actions { display: flex; }
.act { background: none; border: none; cursor: pointer; color: var(--muted); font-size: 13px; padding: 2px 4px; }
.act:hover { color: var(--text); }

/* 登录页 */
.auth-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px 16px;
  background:
    radial-gradient(1200px 600px at 80% -10%, var(--accent) 0%, transparent 55%),
    radial-gradient(900px 500px at -10% 110%, var(--accent) 0%, transparent 50%),
    var(--bg);
}
.auth-card {
  width: 100%; max-width: 400px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.10);
  animation: auth-in 0.35s ease;
}
@keyframes auth-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.brand { text-align: center; margin-bottom: 28px; }
.brand h1 { margin: 12px 0 6px; font-size: 24px; }
.logo { width: 44px; height: 44px; }
.tagline { color: var(--muted); font-size: 14px; margin: 0; }

.auth-form { display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--muted); }
.field input {
  padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text);
  font-size: 15px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.field input[readonly] { opacity: 0.75; }

.auth-page .btn.primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #000));
  border-color: transparent;
  transition: transform 0.1s, box-shadow 0.15s, filter 0.15s;
}
.auth-page .btn.primary:hover { filter: brightness(1.05); box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 35%, transparent); }
.auth-page .btn.primary:active { transform: scale(0.985); }
.btn.block { width: 100%; padding: 11px 14px; font-size: 15px; border-radius: 8px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; filter: none; box-shadow: none; transform: none; }

.hint { text-align: center; font-size: 13px; margin: 20px 0 0; }
.msg.err {
  margin: 14px 0 0; padding: 8px 12px; text-align: center;
  background: color-mix(in srgb, #cf222e 10%, transparent);
  color: #cf222e; border-radius: 8px; font-size: 13px;
}

/* 弹窗 */
.modal {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 20;
}
.modal.hidden { display: none; }
.hidden { display: none !important; }
.modal-box {
  width: 420px; max-width: calc(100vw - 32px);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 24px 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  animation: modal-in 0.18s ease;
}
@keyframes modal-in { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.modal-head h3 { margin: 0; font-size: 17px; }
.modal-close {
  background: none; border: none; cursor: pointer;
  color: var(--muted); font-size: 16px; padding: 4px 6px; border-radius: 6px;
}
.modal-close:hover { color: var(--text); background: var(--bg); }
.modal-box form { display: flex; flex-direction: column; gap: 12px; margin: 0; }
.modal-box .muted { margin: 0 0 4px; }
.modal-box input[type=file] { border: none; padding: 0; background: none; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }

/* ——— 未登录首页 Landing ——— */
.landing { min-height: 100vh; background: var(--bg); }
.landing-nav { position: sticky; top: 0; backdrop-filter: saturate(1.2) blur(8px); background: color-mix(in srgb, var(--card-bg) 85%, transparent); z-index: 5; }
.landing-nav-inner { max-width: var(--landing-max); margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; justify-content: space-between; }
.landing-logo { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; }
.hero { max-width: none; margin: 0; padding: 56px 16px 32px; text-align: center;
  background:
    radial-gradient(900px 400px at 70% -10%, color-mix(in srgb, var(--accent) 18%, transparent) 0%, transparent 60%),
    radial-gradient(700px 400px at 10% 100%, color-mix(in srgb, var(--accent) 12%, transparent) 0%, transparent 60%);
}
.hero-inner { max-width: var(--landing-max); margin: 0 auto; }
.hero-badge { display: inline-block; font-size: 12px; letter-spacing: .04em; color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent); padding: 4px 10px; border-radius: 999px; }
.hero-title { margin: 16px 0 12px; font-size: clamp(28px, 5vw, 40px); line-height: 1.15; letter-spacing: -.02em; }
.hero-title .grad { background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #8b5cf6)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-lead { color: var(--muted); font-size: 15px; line-height: 1.7; margin: 0; }
.hero-lead .br { display: none; }
@media (min-width: 640px) { .hero-lead .br { display: inline; } }
.hero-preview { margin: 28px auto 0; max-width: var(--landing-max); background: var(--card-bg); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; box-shadow: 0 16px 40px rgba(0,0,0,.08); text-align: left; padding: 12px 16px 24px; }
.hero-preview img { display: block; width: 100%; height: auto; aspect-ratio: 1.83; object-fit: cover; }
.preview-bar { display: flex; align-items:center; gap: 6px; padding: 8px 12px; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 60%, transparent); }
.preview-bar span { width: 8px; height: 8px; border-radius: 50%; background: var(--border); flex-shrink:0; }
.preview-bar span:first-child { background: #ff5f56; } .preview-bar span:nth-child(2){background:#ffbd2e} .preview-bar span:nth-child(3){background:#27c93f}
.preview-url { margin-left: 8px; font-size: 11px; color: var(--muted); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 14px; }
.preview-group { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; font-size: 13px; }
.preview-group b { display: flex; align-items:center; gap:6px; font-size: 12px; margin-bottom: 6px; }
.preview-group b em { font-style:normal; font-weight:400; color: var(--muted); font-size:11px; margin-left:auto; }
.preview-group b em.pulse { color: var(--accent); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.55} }
.preview-item { display:flex; align-items:center; gap:6px; font-size:12px; color: var(--text); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; margin-top:4px; }
.preview-item img { width:12px; height:12px; flex-shrink:0; border-radius:2px; }
.preview-item.opacity-60 { opacity:.6; }
.preview-more { display:block; font-size:11px; margin-top:4px; }
.preview-foot { text-align:center; font-size:11px; padding:6px 0 10px; border-top: 1px dashed var(--border); margin: 4px 14px 0; }
.preview-group.muted { color: var(--muted); border-style: dashed; }
.features-grid { max-width: var(--landing-max); margin: 8px auto 0; padding: 12px 16px 24px; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.feat { background: var(--card-bg); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.feat-icon { width: 28px; height: 28px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); border-radius: 8px; font-size: 14px; margin-bottom: 8px; }
.feat h3 { margin: 0 0 6px; font-size: 14px; }
.feat p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.feat code { background: var(--bg); border: 1px solid var(--border); padding: 1px 4px; border-radius: 4px; font-size: 12px; }
.landing-foot { text-align: center; padding: 18px 16px 28px; font-size: 12px; max-width: var(--landing-max); margin: 12px auto 0; border-top: 1px solid var(--border); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.faq { max-width: var(--landing-max); margin: 12px auto 0; padding: 0 16px 12px; }
.faq details { max-width: 860px; margin-left:auto; margin-right:auto; }
.faq h2 { font-size: 16px; margin: 0 0 10px; text-align: center; }
.faq details { background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; margin-bottom: 8px; }
.faq summary { cursor: pointer; font-size: 14px; font-weight: 600; }
.faq p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.6; }

/* 拖动排序手柄 — SVG 统一渲染，增大触摸区 */
.cat-drag-handle, .card-drag-handle{
  display:inline-flex; align-items:center; justify-content:center;
  width:20px; height:20px; padding:0; flex-shrink:0;
  cursor:grab; user-select:none; color:var(--muted);
  border-radius:4px; align-self:center;
}
.cat-drag-handle{ opacity:.55; margin-right:2px; }
.card-drag-handle{ opacity:.45; }
.cat-drag-handle:active, .card-drag-handle:active{ cursor:grabbing; }
.cat-drag-handle:hover, .card-drag-handle:hover{ background:var(--bg); opacity:.9; }
.cat-drag-handle svg, .card-drag-handle svg{ display:block; }
.sortable-ghost{opacity:.4}
.sortable-chosen{opacity:.9}

/* 回收站 */
.badge{display:inline-flex;align-items:center;justify-content:center;min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:var(--accent);color:#fff;font-size:11px;line-height:1;margin-left:4px}
.trash-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:16px 0}
.trash-head h2{margin:0;font-size:18px}
.trash-actions{display:flex;gap:8px}
.trash-list{display:flex;flex-direction:column;gap:8px}
.trash-card{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--card-bg);border:1px solid var(--border);border-radius:8px;width:100%;flex-wrap:nowrap;overflow:hidden}
.trash-card img{width:20px;height:20px;min-width:20px;min-height:20px;max-width:20px;max-height:20px;flex-shrink:0;object-fit:contain;border-radius:4px;background:var(--bg);display:block}
.trash-info{flex:1;min-width:0}
.trash-title{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.trash-title a{color:var(--text)}
.trash-meta{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.trash-ops{display:flex;gap:6px;flex-shrink:0}
.btn.small{padding:4px 10px;font-size:12px}
.trash-modal-box{width:640px;max-width:calc(100vw - 32px);max-height:80vh;display:flex;flex-direction:column}
.trash-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:4px 0 8px}
.trash-list--scroll{overflow-y:auto;max-height:60vh;padding-right:2px;display:flex;flex-direction:column;gap:8px}
/* 通用确认弹窗 */
.confirm-box{width:380px;max-width:calc(100vw - 32px);text-align:center;padding:28px 24px 20px}
.confirm-icon{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;margin:0 auto 12px;font-size:20px;font-weight:700;line-height:1}
.confirm-icon.warn{background:color-mix(in srgb, #f59e0b 14%, transparent);color:#b45309;border:1px solid color-mix(in srgb, #f59e0b 30%, transparent)}
.confirm-icon.danger{background:color-mix(in srgb, #cf222e 12%, transparent);color:#cf222e;border:1px solid color-mix(in srgb, #cf222e 25%, transparent)}
#confirm-title{margin:0 0 6px;font-size:17px}
#confirm-desc{margin:0 0 4px;font-size:13px;line-height:1.6;white-space:pre-line}
.confirm-box .btn.danger{background:#cf222e;border-color:#cf222e;color:#fff}
.confirm-box .btn.danger:hover{filter:brightness(1.05)}

/* 移动端：notice 单独一行随滚动隐藏，顶栏不换行；卡片保证至少两列 */
@media (max-width: 768px){
  .topbar{ padding:8px 10px; }
  .topbar-inner{ gap:6px; }
  .topbar .notice{ display:none; }
  .notice-bar{ display:block; }
  .search{ font-size:14px; }
  #btn-add, #btn-import{ padding:6px 10px; font-size:13px; }
  #btn-import{ display:none; }
  #menu-import{ display:block; }
  .landing-nav-inner{ padding:8px 10px; }
  .page{ padding:12px 10px; }
  .group{ margin:16px 0; }
  .group h2{ font-size:14px; margin:0 0 8px; }
  .cards{ grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap:6px; }
  .card{ padding:4px 6px; gap:4px; font-size:12px; border-radius:6px; }
  .card img{ width:14px; height:14px; }
  .card a{ gap:4px; }
  .card a span{ font-size:12px; }
  .card-actions .act{ font-size:12px; padding:1px 3px; }
  .card-drag-handle{ width:16px; height:16px; }
}
@media (max-width: 360px){
  #btn-add{ display:none; }
  #menu-add{ display:block; }
  .cards{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}