:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1f2328;
  --ink-soft: #5b6472;
  --line: #e2e5ea;
  --accent: #2f6fed;
  --accent-soft: #e8f0fe;
  --code-bg: #f2f4f7;
  --mark: #ffe9a8;
  --shadow: 0 1px 3px rgba(20, 25, 35, .08);
  --radius: 10px;
}

html[data-theme="dark"] {
  --bg: #14171c;
  --panel: #1b1f26;
  --ink: #e7eaef;
  --ink-soft: #97a1b0;
  --line: #2b313a;
  --accent: #6f9bff;
  --accent-soft: #223052;
  --code-bg: #232830;
  --mark: #6a5622;
  --shadow: 0 1px 3px rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.75 -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.brand { font-size: 16px; margin: 0; white-space: nowrap; }
.search-wrap { flex: 1; position: relative; min-width: 120px; }
#search {
  width: 100%; padding: 8px 60px 8px 12px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--bg); color: var(--ink); font-size: 14px;
}
#search:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.search-count {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  font-size: 12px; color: var(--ink-soft); pointer-events: none;
}
.btn {
  padding: 8px 14px; border: 1px solid var(--accent); border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 14px; cursor: pointer; white-space: nowrap;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--accent); }
.icon-btn {
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  width: 34px; height: 34px; border-radius: 8px; cursor: pointer; font-size: 15px;
}
#menu-btn { display: none; }

/* ---------- 布局 ---------- */
.layout { display: flex; align-items: flex-start; }

.sidebar {
  width: 310px; flex: none;
  position: sticky; top: 55px;
  height: calc(100vh - 55px);
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 12px;
}
.tagbar { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tag {
  font-size: 12px; padding: 3px 9px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink-soft); cursor: pointer;
}
.tag:hover { border-color: var(--accent); color: var(--accent); }
.tag.on { background: var(--accent); border-color: var(--accent); color: #fff; }

.note-list { list-style: none; margin: 0; padding: 0; }
.note-list li {
  padding: 10px 12px; border-radius: var(--radius); cursor: pointer;
  border: 1px solid transparent; margin-bottom: 4px;
}
.note-list li:hover { background: var(--bg); }
.note-list li.on { background: var(--accent-soft); border-color: var(--accent); }
.note-list .t { font-weight: 600; font-size: 14px; display: block; }
.note-list .m { font-size: 12px; color: var(--ink-soft); display: block; margin-top: 2px; }
.note-list .s { font-size: 12px; color: var(--ink-soft); display: block; margin-top: 3px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar-foot { font-size: 12px; color: var(--ink-soft); text-align: center; margin: 14px 0 4px; }

.main { flex: 1; min-width: 0; padding: 26px 34px 90px; }
.article {
  max-width: 860px; margin: 0 auto;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; box-shadow: var(--shadow);
  padding: 32px 40px 44px;
}

/* ---------- 笔记头 ---------- */
.note-head { border-bottom: 1px solid var(--line); padding-bottom: 14px; margin-bottom: 22px; }
.note-head h1 { margin: 0 0 8px; font-size: 26px; line-height: 1.35; }
.note-meta { font-size: 13px; color: var(--ink-soft); display: flex; flex-wrap: wrap; gap: 12px; }
.note-meta .tag { cursor: pointer; }

/* ---------- Markdown 正文 ---------- */
.md h1 { font-size: 24px; margin: 34px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.md h2 { font-size: 20px; margin: 30px 0 10px; padding-bottom: 5px; border-bottom: 1px solid var(--line); }
.md h3 { font-size: 17px; margin: 24px 0 8px; }
.md h4 { font-size: 15px; margin: 20px 0 6px; }
.md p { margin: 10px 0; }
.md ul, .md ol { padding-left: 24px; }
.md li { margin: 4px 0; }
.md a { color: var(--accent); }
.md hr { border: none; border-top: 1px solid var(--line); margin: 30px 0; }
.md blockquote {
  margin: 14px 0; padding: 8px 16px; color: var(--ink-soft);
  border-left: 4px solid var(--accent); background: var(--bg); border-radius: 0 8px 8px 0;
}
.md code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px; background: var(--code-bg); padding: 2px 5px; border-radius: 4px;
}
.md pre {
  background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; overflow-x: auto; line-height: 1.6;
}
.md pre code { background: none; padding: 0; font-size: 13px; }
.md table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14px; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 8px 11px; text-align: left; vertical-align: top; }
.md th { background: var(--bg); font-weight: 600; }
.md tr:nth-child(even) td { background: color-mix(in srgb, var(--bg) 55%, transparent); }
.md img { max-width: 100%; border-radius: 8px; }
mark { background: var(--mark); color: inherit; border-radius: 3px; padding: 0 2px; }

.empty { text-align: center; color: var(--ink-soft); padding: 60px 20px; }
.empty h2 { color: var(--ink); }

/* ---------- 新建笔记弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(15, 18, 24, .5);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal.hidden { display: none; }
.modal-box {
  background: var(--panel); border-radius: 14px; width: min(760px, 100%);
  max-height: 92vh; display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.modal-head, .modal-foot {
  display: flex; align-items: center; gap: 10px; padding: 14px 20px;
}
.modal-head { border-bottom: 1px solid var(--line); justify-content: space-between; }
.modal-head h2 { margin: 0; font-size: 17px; }
.modal-foot { border-top: 1px solid var(--line); justify-content: flex-end; }
.modal-body { padding: 16px 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; }
.modal-body label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--ink-soft); }
.modal-body .row { display: flex; gap: 12px; }
.modal-body .row label { flex: 1; }
.modal-body input, .modal-body textarea {
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--ink); font-size: 14px; font-family: inherit;
}
.modal-body textarea { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; resize: vertical; }
.hint { font-size: 12px; color: var(--ink-soft); background: var(--bg); padding: 9px 12px; border-radius: 8px; }
.hint code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }

/* ---------- 手机 ---------- */
@media (max-width: 860px) {
  .brand { display: none; }
  #menu-btn { display: block; }
  .sidebar {
    position: fixed; left: 0; top: 55px; bottom: 0; width: 84%; max-width: 330px;
    height: auto; z-index: 25; transform: translateX(-102%); transition: transform .22s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,.18);
  }
  .sidebar.open { transform: none; }
  .main { padding: 14px 12px 70px; }
  .article { padding: 20px 18px 30px; border-radius: 10px; }
  .note-head h1 { font-size: 21px; }
  #new-btn { padding: 8px 10px; font-size: 13px; }
  .modal-body .row { flex-direction: column; }
}