/* X站one · 设计系统
   方向：工具型个人站。无衬线为主，等宽处理数字与元信息，靠留白和细线分层，不用阴影。 */

:root {
  --bg: #fcfcfa;
  --surface: #ffffff;
  --surface-2: #f3f3ef;
  --ink: #14161a;
  --muted: #6b7075;
  --faint: #74797f;
  --line: #e7e7e2;
  --line-strong: #d3d3cc;
  --accent: #0d7a5f;
  --accent-ink: #0a5744;
  --accent-soft: #e8f4ef;
  --danger: #a8422f;
  --danger-soft: #f9ece8;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --serif: Georgia, "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1110;
    --surface: #161917;
    --surface-2: #1d211e;
    --ink: #e9e9e3;
    --muted: #9ba1a0;
    --faint: #8b9290;
    --line: #262a26;
    --line-strong: #39403a;
    --accent: #5bba9c;
    --accent-ink: #bde8d8;
    --accent-soft: #1a2b25;
    --danger: #e08a76;
    --danger-soft: #2e211d;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap { width: min(1040px, calc(100% - 48px)); margin: 0 auto; }

/* ── 顶栏 ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 56px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--ink);
  color: var(--bg);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
}
.nav { display: flex; align-items: center; gap: 2px; }
.nav a {
  color: var(--muted);
  font-size: 13.5px;
  padding: 6px 11px;
  border-radius: var(--r-sm);
}
.nav a:hover { color: var(--ink); background: var(--surface-2); }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 500; }

/* ── 主体 ── */
main { padding: 48px 0 80px; }

.intro { max-width: 620px; margin: 0 auto; text-align: center; }

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin: 0 0 14px;
}
.intro h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  text-wrap: balance;
}
.intro p { margin: 0 auto; color: var(--muted); font-size: 14.5px; max-width: 480px; }
.intro-links { display: flex; flex-wrap: wrap; gap: 6px 22px; margin-top: 20px; justify-content: center; }
.intro-links a {
  font-size: 14px;
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}
.intro-links a:hover { color: var(--accent); border-color: var(--accent); }

.home-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 248px;
  gap: 24px 56px;
  margin-top: 40px;
  align-items: start;
}
.col-side { display: flex; flex-direction: column; gap: 34px; }

.sec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2px;
}
.sec-head h2 {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--faint);
}
.sec-head a, .sec-head span {
  font-size: 12px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.sec-head a:hover { color: var(--accent); }

.side-block h2 {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--faint);
}
.side-block p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.7; }

.tool-links { list-style: none; margin: 0; padding: 0; }
.tool-links li + li { border-top: 1px solid var(--line); }
.tool-links a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-size: 13.5px;
  color: var(--ink);
}
.tool-links a::after { content: "→"; color: var(--faint); font-family: var(--mono); font-size: 12px; }
.tool-links a:hover { color: var(--accent); }
.tool-links a:hover::after { color: var(--accent); }

/* ── 列表 ── */
.feed { display: flex; flex-direction: column; }

.feed-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: inherit;
}
.feed-row:last-child { border-bottom: 0; }
.feed-row:hover { color: inherit; }

.feed-date {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--faint);
  padding-top: 4px;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.feed-body { min-width: 0; overflow-wrap: anywhere; }
.feed-body h3 {
  margin: 0 0 4px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.012em;
  transition: color 0.14s ease;
}
.feed-row:hover h3 { color: var(--accent); }
.feed-body p {
  margin: 0;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.feed-row .tags { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }

.tag {
  display: inline-block;
  padding: 0 8px;
  border-radius: 5px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.75;
  font-family: var(--mono);
}

/* ── 筛选 ── */
.filter {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
  margin: 22px 0 6px;
}
.filter .tags { display: flex; flex-wrap: wrap; gap: 6px; }
.search {
  width: 100%;
  max-width: 340px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--r-sm);
  padding: 7px 12px;
  font: inherit;
  font-size: 13.5px;
  color: var(--ink);
}
.search::placeholder { color: var(--faint); }
.search:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.tag-button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12.5px;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.14s ease, color 0.14s ease;
}
.tag-button:hover { background: var(--surface-2); color: var(--ink); }
.tag-button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }

/* ── 标题区 ── */
.page-title {
  font-family: var(--serif);
  font-size: clamp(26px, 3.8vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.page-lede { color: var(--muted); font-size: 14.5px; margin: 0 0 26px; max-width: 520px; }

/* ── 工具页 ── */
.tool-tabs {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
  scrollbar-width: none;
}
.tool-tabs::-webkit-scrollbar { display: none; }
.tool-tabs[hidden] { display: none; }
.tool-tab {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 13.5px;
  color: var(--muted);
  padding: 9px 13px 11px;
  white-space: nowrap;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.14s ease, border-color 0.14s ease;
}
.tool-tab:hover { color: var(--ink); }
.tool-tab[aria-selected="true"] { color: var(--ink); font-weight: 500; border-bottom-color: var(--accent); }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 24px;
}
.panel h2 { margin: 0 0 4px; font-size: 17px; font-weight: 600; letter-spacing: -0.015em; }
.panel-hint { margin: 0 0 18px; color: var(--muted); font-size: 13px; }

/* ── 表单 ── */
.field { margin-bottom: 12px; }
.field > label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 5px; }
.counter {
  float: right;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.counter.is-near { color: var(--danger); }

input[type="text"], input[type="password"], input[type="search"], textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  border-radius: var(--r-sm);
  padding: 9px 12px;
  font: inherit;
  font-size: 14px;
  line-height: 1.65;
}
textarea { resize: vertical; min-height: 120px; font-family: var(--mono); font-size: 13.5px; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.row-between { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
.grow { flex: 1 1 auto; }
.mt { margin-top: 28px; }
.divider-top { border-top: 1px solid var(--line); padding-top: 18px; margin-top: 18px; }

.check-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 14px 0;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
}
.check-row input { width: auto; accent-color: var(--accent); }

/* ── 按钮 ── */
.btn {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 13.5px;
  padding: 8px 15px;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background 0.14s ease, border-color 0.14s ease, transform 0.1s ease;
}
.btn:hover { background: var(--surface-2); border-color: var(--faint); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.btn-primary:hover { background: #000; border-color: #000; filter: none; }
.btn-danger { color: var(--danger); border-color: var(--line); background: transparent; }
.btn-danger:hover { background: var(--danger-soft); border-color: var(--danger); }
.btn-sm { padding: 4px 10px; font-size: 12.5px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ── 输出与统计 ── */
.output {
  margin-top: 12px;
  background: var(--surface-2);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 42px;
  max-height: 380px;
  overflow: auto;
}
.output:empty::before { content: "结果会出现在这里"; color: var(--faint); font-family: var(--sans); }
.output.is-error { color: var(--danger); background: var(--danger-soft); }
.output.is-plain { font-family: var(--sans); font-size: 13.5px; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 8px; }
.stat { background: var(--surface-2); border-radius: var(--r-sm); padding: 11px 13px; }
.stat b {
  display: block;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: 11.5px; color: var(--muted); }

.swatch { width: 40px; height: 40px; border-radius: var(--r-sm); border: 1px solid var(--line); }

/* ── 后台 ── */
.auth-card { max-width: 380px; margin: 20px auto 0; }

.admin-shell { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 20px; align-items: start; }

.admin-item {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.admin-item:last-child { border-bottom: 0; }
.admin-item h4 { margin: 0 0 3px; font-size: 14px; font-weight: 600; line-height: 1.5; }
.admin-item.is-hidden h4::after {
  content: "私密";
  margin-left: 7px;
  font-size: 10.5px;
  color: var(--faint);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0 5px;
  vertical-align: 2px;
  font-weight: 400;
}
.admin-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* ── 文章 ── */
.article-head { padding-bottom: 18px; margin-bottom: 26px; border-bottom: 1px solid var(--line); max-width: 70ch; }
.article-head h1 {
  font-family: var(--serif);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1.36;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}

.note-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.note-meta .tag { font-size: 11px; }

.prose { font-size: 16px; line-height: 1.9; color: var(--ink); max-width: 70ch; overflow-wrap: break-word; }
.prose img, .prose video { max-width: 100%; height: auto; border-radius: var(--r-sm); }
.prose table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; margin: 0 0 1.1em; }
.prose th, .prose td { border: 1px solid var(--line); padding: 7px 10px; text-align: left; font-size: 14.5px; white-space: nowrap; }
.prose h1, .prose h2, .prose h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.45;
  margin: 1.7em 0 0.55em;
}
.prose h1 { font-size: 23px; }
.prose h2 { font-size: 19px; }
.prose h3 { font-size: 16.5px; }
.prose p { margin: 0 0 1.1em; }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 1.1em; }
.prose li { margin-bottom: 0.3em; }
.prose li::marker { color: var(--faint); }
.prose code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 4px;
}
.prose pre {
  background: var(--surface-2);
  border-radius: var(--r-sm);
  padding: 14px 16px;
  overflow: auto;
  margin: 0 0 1.1em;
}
.prose pre code { background: none; padding: 0; font-size: 12.5px; }
.prose blockquote {
  margin: 0 0 1.1em;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--accent);
  color: var(--muted);
}
.prose a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-strong); }
.prose a:hover { text-decoration-color: var(--accent); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }

.post-nav {
  display: flex;
  gap: 16px;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  max-width: 70ch;
}
.post-nav-item { flex: 1 1 0; min-width: 0; font-size: 11.5px; color: var(--faint); font-family: var(--mono); }
.post-nav-item:hover { text-decoration: none; }
.post-nav-item b {
  display: block;
  margin-top: 5px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.post-nav-item:hover b { color: var(--accent); }
.post-nav-item.is-next { text-align: right; }

/* ── 状态 ── */
.muted { color: var(--muted); }
.faint { color: var(--faint); font-size: 12.5px; }

.empty {
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  padding: 40px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 13.5px;
}
.empty b { display: block; color: var(--ink); font-size: 14.5px; font-weight: 600; margin-bottom: 5px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(26px + env(safe-area-inset-bottom, 0px));
  transform: translate(-50%, 10px);
  background: var(--ink);
  color: var(--bg);
  font-size: 13px;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 50;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ── 页脚 ── */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 40px;
  font-size: 12.5px;
  color: var(--faint);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 6px 20px; justify-content: space-between; }
.site-footer a { color: var(--faint); border-bottom: 1px solid transparent; }
.site-footer a:hover { color: var(--ink); border-color: var(--line-strong); }

/* ── 无障碍：键盘跳转 ── */
.skip {
  position: fixed;
  top: -64px;
  left: 12px;
  z-index: 60;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  transition: top 0.15s ease;
}
.skip:focus { top: 12px; color: var(--bg); }
#main:focus, #main:focus-visible { outline: none; }

/* ── 骨架屏 ── */
.skeleton-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.sk {
  background: var(--surface-2);
  border-radius: 5px;
  height: 12px;
  animation: sk-pulse 1.5s ease-in-out infinite;
}
.sk-date { width: 38px; margin-top: 3px; }
.sk-title { width: 58%; height: 15px; margin-bottom: 10px; }
.sk-line { width: 86%; }
@keyframes sk-pulse {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

/* ── 结果计数 ── */
.result-count:empty { display: none; }
.result-count {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--faint);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ── 响应式 ── */
@media (max-width: 900px) {
  .home-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; margin-top: 40px; }
  .admin-shell { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  .wrap { width: calc(100% - 32px); }
  main { padding: 32px 0 60px; }
  .site-header .wrap { height: 52px; gap: 12px; }
  .nav { gap: 0; }
  .nav a {
    font-size: 13px;
    padding: 8px 10px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }
  .search { min-height: 42px; }
  .tag-button { padding: 7px 12px; min-height: 34px; }
  .brand { font-size: 14px; }
  .feed-row { grid-template-columns: 44px minmax(0, 1fr); gap: 12px; }
  .feed-date { font-size: 10.5px; }
  .panel { padding: 16px; }
  .intro-links { gap: 6px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}