@font-face {
  font-family:"PT Sans";
  src:url("../fonts/PTSans-Regular.woff") format("woff");
  font-weight:400;
  font-display:swap
}

@font-face {
  font-family:"PT Sans";
  src:url("../fonts/PTSans-Bold.woff") format("woff");
  font-weight:700;
  font-display:swap
}

:root {
  --background:#f7f8fd;
  --surface:#fff;
  --ink:#15182a;
  --muted:#5f6475;
  --accent:#6d3ee8;
  --accent-soft:#f0eaff;
  --border:#e5e5f1;
  --cyan:#00b8d4;
  --violet:#7c4dff;
  --mint:#dff7fb;
  --radius:18px;
  --shadow:0 8px 32px #29204b06;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans","PingFang SC","Microsoft YaHei",sans-serif;
  --font-display:var(--font-sans);
  color-scheme:light
}

* {
  box-sizing:border-box
}

html {
  scroll-behavior:smooth;
  scroll-padding-top:30px
}

body {
  margin:0;
  background:var(--background);
  color:var(--ink);
  font:16px/1.8 var(--font-sans);
  -webkit-font-smoothing:antialiased
}

a {
  color:var(--accent);
  text-decoration:none;
  text-underline-offset:.2em
}

a:hover {
  text-decoration:underline
}

:focus-visible {
  outline:3px solid var(--accent);
  outline-offset:5px
}

button,input,select {
  font:inherit
}

button {
  cursor:pointer
}

h1,h2,h3,h4 {
  line-height:1.2;
  letter-spacing:-.025em
}

p {
  margin-top:0
}

img {
  max-width:100%;
  height:auto
}

svg {
  max-width:100%
}

[hidden] {
  display:none!important
}

.site-container {
  width:min(1200px,calc(100% - 80px));
  margin-inline:auto
}

.site-header {
  background:#ffffffee;
  border-bottom:1px solid var(--border);
  position:relative;
  z-index:10
}

.site-header::before {
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(100deg,#4c1d95,#7c4dff,#00b8d4)
}

.header-inner {
  min-height:88px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px
}

.site-brand {
  display:flex;
  align-items:center;
  gap:12px;
  color:var(--ink);
  font-size:19px;
  font-weight:600;
  line-height:1.2
}

.site-brand:hover {
  text-decoration:none
}

.brand-mark {
  width:40px;
  height:40px;
  border:1px solid #7445e2;
  border-radius:12px;
  background:linear-gradient(145deg,#824af7,#5726c0);
  color:#fff;
  display:grid;
  place-items:center;
  font:700 23px/1 var(--font-display)
}

.brand-caption {
  display:block;
  color:var(--muted);
  font-size:11px;
  letter-spacing:.04em;
  font-weight:400;
  margin-top:5px
}

.site-nav {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px
}

.site-nav a {
  font-size:14px;
  color:var(--muted);
  padding:9px 16px;
  border-radius:9px;
  transition:color .18s,box-shadow .18s
}

.site-nav a:hover {
  color:var(--ink);
  background:#f3f1fa;
  text-decoration:none
}

.site-nav a.is-active {
  color:var(--accent);
  background:var(--accent-soft);
  font-weight:600
}

.header-actions {
  display:flex;
  align-items:center;
  gap:26px
}

.header-github {
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border:1px solid var(--border);
  border-radius:10px;
  color:#5f6475;
  transition:color .18s,border-color .18s
}

.header-github svg {
  width:19px;
  height:19px;
  fill:currentColor
}

.header-github:hover {
  color:var(--accent);
  border-color:#cabaf3
}

.skip-link {
  position:fixed;
  left:16px;
  top:12px;
  transform:translateY(-150%);
  background:var(--ink);
  color:#fff;
  border-radius:8px;
  padding:10px 20px;
  z-index:100
}

.skip-link:focus {
  transform:translateY(0)
}

main {
  min-height:65vh
}

main:focus {
  outline:none
}

.eyebrow {
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  font-weight:700;
  color:var(--muted)
}

.accent-dot {
  color:var(--accent)
}

.page-lead {
  color:var(--muted);
  font-size:20px;
  line-height:1.7;
  max-width:680px
}

.button {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:47px;
  padding:11px 22px;
  border-radius:10px;
  border:1px solid var(--border);
  font-size:14px;
  font-weight:600;
  line-height:1.5;
  transition:background .18s,border-color .18s,color .18s
}

.button:hover {
  text-decoration:none
}

.button-primary {
  background:var(--accent);
  color:#fff;
  border-color:var(--accent)
}

.button-primary:hover {
  background:#5b28ce
}

.button-secondary {
  background:var(--surface);
  color:var(--ink)
}

.button-secondary:hover {
  border-color:#a88ce2
}

.text-link {
  font-size:15px;
  font-weight:700
}

.site-footer {
  border-top:1px solid var(--border);
  margin-top:64px
}

.footer-inner {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:25px;
  padding-block:36px
}

.footer-inner p {
  font-size:14px;
  margin:0
}

.footer-inner p span {
  display:block;
  color:var(--muted);
  font-size:12px;
  margin-top:3px
}

.footer-inner nav {
  display:flex;
  flex-wrap:wrap;
  gap:21px
}

.footer-inner nav a {
  color:var(--muted);
  font-size:13px
}

.prose-page {
  max-width:760px;
  padding-block:80px 20px
}

.prose-heading {
  padding-bottom:32px;
  border-bottom:1px solid var(--border);
  margin-bottom:36px
}

.prose-heading h1 {
  font-family:var(--font-display);
  font-size:clamp(40px,5vw,60px);
  font-weight:750;
  margin:18px 0 22px
}

.post-meta {
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  font-size:13px;
  color:var(--muted)
}

.post-meta span {
  font-size:11px;
  background:var(--accent-soft);
  color:var(--accent);
  padding:2px 10px;
  border-radius:5px
}

.prose {
  color:#40465b;
  overflow-wrap:anywhere
}

.prose p {
  margin-bottom:1.7em;
  font-size:17px;
  line-height:1.95
}

.prose h2,.prose h3,.prose h4 {
  color:var(--ink);
  margin:2em 0 .8em
}

.prose h2 {
  font-size:29px
}

.prose h3 {
  font-size:23px
}

.prose img {
  border-radius:14px
}

.prose blockquote {
  margin:25px 0;
  padding:20px 25px;
  border-left:3px solid var(--accent);
  background:var(--accent-soft);
  border-radius:0 12px 12px 0
}

.prose blockquote p:last-child {
  margin-bottom:0
}

.prose table {
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  max-width:100%;
  font-size:15px
}

.prose th,.prose td {
  padding:12px 16px;
  border:1px solid var(--border);
  text-align:left
}

.prose th {
  background:var(--accent-soft)
}

.prose pre {
  overflow-x:auto;
  padding:22px;
  border-radius:12px;
  background:#17243d;
  color:#e7edf7;
  font-size:14px;
  line-height:1.7
}

.prose :not(pre)>code {
  background:#efedf7;
  padding:2px 5px;
  border-radius:4px;
  font-size:.88em
}

.prose iframe {
  max-width:100%;
  border:0
}

.prose hr {
  border:0;
  border-top:1px solid var(--border);
  margin-block:30px
}

.katex {
  overflow-x:auto;
  overflow-y:hidden
}

.highlight .c,.highlight .c1,.highlight .cm {
  color:#9ca8ba
}

.highlight .k,.highlight .kt,.highlight .kd {
  color:#87d3e3
}

.highlight .s,.highlight .s1,.highlight .s2 {
  color:#d2e9a9
}

.highlight .m,.highlight .mi,.highlight .mf {
  color:#bba3e8
}

.highlight .nf {
  color:#91dcbd
}

.writing-page {
  padding-top:84px;
  max-width:920px
}

.section-heading h1 {
  font-family:var(--font-display);
  font-weight:750;
  font-size:clamp(40px,5vw,60px);
  margin:14px 0 20px
}

.writing-list {
  margin-block:52px 36px
}

.writing-item {
  display:grid;
  grid-template-columns:130px 1fr;
  gap:32px;
  padding:34px 0;
  border-top:1px solid var(--border)
}

.writing-item>time {
  color:var(--muted);
  font-size:13px;
  margin-top:6px
}

.writing-item h2 {
  margin:0 0 12px;
  font-size:25px;
  font-weight:500
}

.writing-item h2 a {
  color:var(--ink)
}

.writing-item h2 span {
  color:var(--accent);
  font-size:20px
}

.writing-item p {
  color:var(--muted);
  font-size:15px;
  margin-bottom:15px
}

.empty-writing {
  padding:25px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:14px
}

.archive {
  max-width:840px;
  margin:60px auto;
  padding-inline:24px
}

.archive time {
  color:var(--muted);
  margin-right:15px
}

@media(max-width:700px) {
  .site-container {
    width:calc(100% - 40px)
  }

  .header-inner {
    min-height:92px;
    align-items:flex-start;
    flex-direction:column;
    padding-block:15px 12px;
    gap:12px
  }

  .site-brand {
    font-size:19px
  }

  .brand-mark {
    width:38px;
    height:38px
  }

  .site-nav {
    justify-content:space-between;
    gap:18px;
    width:100%
  }

  .header-actions {
    width:100%;
    gap:12px
  }

  .header-github {
    position:absolute;
    right:20px;
    top:17px
  }

  .site-nav a {
    padding:8px 10px;
    font-size:13px
  }

  .footer-inner {
    flex-direction:column;
    align-items:flex-start
  }

  .footer-inner nav {
    gap:18px
  }

  .prose-page,.writing-page {
    padding-top:40px
  }

  .page-lead {
    font-size:18px
  }

  .writing-item {
    grid-template-columns:1fr;
    gap:10px
  }

  .prose h2 {
    font-size:25px
  }

}

@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto
  }

  *,*::before,*::after {
    animation-duration:.01ms!important;
    transition-duration:.01ms!important
  }

}