/* 浅蓝的生活记录 —— 样式表
   系统字体,无外部请求,暗色跟随系统 */

:root {
  --paper:   #F1F4F7;
  --surface: #FBFCFD;
  --ink:     #1E2A33;
  --ink-2:   #6B7C89;
  --blue:    #5B93C7;
  --blue-d:  #2F5D8C;
  --rule:    #DDE4EA;

  --font-serif: Georgia, "Songti SC", "STSong", "Noto Serif CJK SC",
                "Source Han Serif SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC",
               "Source Han Sans SC", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:   #121920;
    --surface: #18212A;
    --ink:     #D8E1E8;
    --ink-2:   #8497A3;
    --blue:    #7FB0DC;
    --blue-d:  #A8CBE9;
    --rule:    #26333E;
  }
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-d); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.25em; }
a:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 2px; }

/* 顶部 */

.masthead {
  position: relative;
  overflow: hidden;
  padding: 3.5rem 0 2.75rem;
  border-bottom: 1px solid var(--rule);
}

.ridges {
  position: absolute;
  inset: auto 0 0 0;
  width: 100%;
  height: 128px;
  pointer-events: none;
  z-index: 0;
}
.ridge-back  { fill: var(--blue); opacity: 0.09; }
.ridge-mid   { fill: var(--blue); opacity: 0.13; }
.ridge-front { fill: var(--blue); opacity: 0.18; }

@media (prefers-color-scheme: dark) {
  .ridge-back  { opacity: 0.08; }
  .ridge-mid   { opacity: 0.12; }
  .ridge-front { opacity: 0.17; }
}

.masthead-inner, .page, .foot-inner {
  max-width: 46rem;
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.masthead-inner { position: relative; z-index: 1; }

.sitename {
  font-family: var(--font-serif);
  font-size: 2.45rem;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: 0.05em;
  margin: 0;
}
.sitename a { color: var(--ink); }
.sitename a:hover { text-decoration: none; color: var(--blue-d); }

.tagline {
  margin: 0.65rem 0 0;
  color: var(--ink-2);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

/* 主体 */

.page { padding-top: 3rem; padding-bottom: 4rem; }

/* 文章列表 */

.entry {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 0 1.75rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--rule);
}
.entry:first-child { padding-top: 0; }

.entry-date {
  font-family: var(--font-serif);
  font-size: 0.88rem;
  color: var(--ink-2);
  letter-spacing: 0.08em;
  line-height: 1.9;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.entry-title {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.03em;
  margin: 0;
}
.entry-title a { color: var(--ink); }
.entry-title a:hover { color: var(--blue-d); text-decoration: none; }

.entry-summary {
  margin: 0.45rem 0 0;
  color: var(--ink-2);
  font-size: 0.93rem;
  line-height: 1.8;
  max-width: 30em;
}

/* 文章正文 */

.post-header { margin-bottom: 2.5rem; }

.post-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.45;
  letter-spacing: 0.04em;
  margin: 0 0 0.75rem;
}

.post-date {
  font-family: var(--font-serif);
  color: var(--ink-2);
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

.post-body { max-width: 34em; }
.post-body p { margin: 0 0 1.5em; }
.post-body ul { padding-left: 1.4em; margin: 0 0 1.5em; }
.post-body li { margin-bottom: 0.5em; }

.post-body code {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.1em 0.35em;
}

.post-body pre {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  line-height: 1.7;
  margin: 0 0 1.5em;
}
.post-body pre code { background: none; border: 0; padding: 0; font-size: 0.85em; }

.post-nav {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.92rem;
}

/* 页脚:备案信息在这里,别删 */

.foot {
  border-top: 1px solid var(--rule);
  background: var(--surface);
  padding: 2rem 0 2.5rem;
}

.foot-inner {
  font-size: 0.82rem;
  line-height: 2;
  color: var(--ink-2);
}
.beian { margin: 0; }
.beian a { color: var(--ink-2); }
.beian a:hover { color: var(--blue-d); }
.gongan { display: inline-flex; align-items: center; gap: 0.35em; }
.gongan img { display: inline-block; width: 14px; height: 14px; }

/* 404 */

.notfound { padding-top: 6rem; padding-bottom: 6rem; }
.notfound h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.8rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.75rem;
}
.notfound p { color: var(--ink-2); max-width: 26em; }

/* 窄屏 */

@media (max-width: 40rem) {
  body { font-size: 16px; }
  .masthead { padding: 2.5rem 0 2.25rem; }
  .sitename { font-size: 1.95rem; }
  .page { padding-top: 2.25rem; padding-bottom: 3rem; }
  .masthead-inner, .page, .foot-inner { padding-left: 1.25rem; padding-right: 1.25rem; }
  .entry { grid-template-columns: 1fr; gap: 0.35rem; padding: 1.4rem 0; }
  .entry-date { line-height: 1.5; font-size: 0.82rem; }
  .post-title { font-size: 1.6rem; }
  .ridges { height: 96px; }
}

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