:root {
  --page: #0a0e0d;
  --page-rgb: 10, 14, 13;
  --ink: #d5dfdc;
  --ink-strong: #eef4f2;
  --ink-dim: rgba(207, 224, 219, 0.52);
  --line: rgba(207, 224, 219, 0.14);
  --accent: #8fb9ae;
  --accent-rgb: 143, 185, 174;
  --serif: ui-serif, "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Courier New", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--page); }
body {
  min-width: 320px;
  background:
    linear-gradient(90deg, transparent, rgba(255,255,255,0.012) 48%, transparent 52%),
    radial-gradient(circle at 50% 8%, rgba(var(--accent-rgb), 0.075), transparent 32rem),
    var(--page);
  color: var(--ink);
  font-family: var(--serif);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body::before {
  position: fixed;
  z-index: 0;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, rgba(255,255,255,0.009) 0 1px, transparent 1px 8vw);
  content: "";
}
a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--ink-strong);
  color: var(--page);
  font: 12px var(--sans);
  text-decoration: none;
  transform: translateY(-180%);
}
.skip-link:focus { transform: translateY(0); }

.reading-progress {
  position: fixed;
  z-index: 80;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: rgba(255,255,255,0.03);
}
.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}

.reader-nav {
  position: absolute;
  z-index: 10;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px clamp(20px, 4vw, 58px);
  color: var(--ink-dim);
  font: 9px/1.5 var(--mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.reader-nav a { padding: 8px 0; text-decoration: none; transition: color 0.2s ease; }
.reader-nav a:hover,
.reader-nav a:focus-visible { color: var(--accent); }

.note-cover,
.archive-cover {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 78svh;
  place-items: center;
  overflow: hidden;
  padding: 120px 28px 86px;
  border-bottom: 1px solid var(--line);
}
.note-cover::before,
.archive-cover::before {
  position: absolute;
  width: min(70vw, 820px);
  aspect-ratio: 1;
  border: 1px solid rgba(var(--accent-rgb), 0.11);
  border-radius: 50%;
  box-shadow: 0 0 100px rgba(var(--accent-rgb), 0.035), inset 0 0 100px rgba(var(--accent-rgb), 0.02);
  content: "";
}
.note-cover::after,
.archive-cover::after {
  position: absolute;
  right: clamp(24px, 6vw, 88px);
  bottom: 38px;
  left: clamp(24px, 6vw, 88px);
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent 35%, transparent 65%, var(--accent));
  content: "";
  opacity: 0.25;
}
.cover-inner { position: relative; z-index: 2; width: min(100%, 920px); text-align: center; }
.cover-kicker,
.cover-meta {
  color: var(--accent);
  font: 9px/1.7 var(--mono);
  letter-spacing: 0.26em;
  text-transform: uppercase;
}
.note-cover h1,
.archive-cover h1 {
  max-width: 12em;
  margin: 32px auto 0;
  color: var(--ink-strong);
  font-size: clamp(46px, 7.4vw, 92px);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.055em;
}
.archive-cover h1 { max-width: 10em; font-size: clamp(44px, 6.8vw, 82px); }
.cover-summary {
  max-width: 42em;
  margin: 34px auto 0;
  color: rgba(213,223,220,0.67);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 2;
}
.cover-meta { margin-top: 28px; color: var(--ink-dim); }
.open-note {
  display: inline-flex;
  margin-top: 44px;
  padding: 12px 0;
  color: var(--accent);
  border-bottom: 1px solid rgba(var(--accent-rgb), 0.42);
  font: 9px/1.5 var(--mono);
  letter-spacing: 0.24em;
  text-decoration: none;
}

.note-main,
.archive-main {
  position: relative;
  z-index: 1;
  width: min(100%, 780px);
  margin: 0 auto;
  padding: clamp(90px, 11vw, 144px) 36px 150px;
}
.note-label,
.archive-heading {
  color: var(--accent);
  font: 9px/1.8 var(--mono);
  letter-spacing: 0.24em;
  text-transform: uppercase;
}
.note-label { margin-bottom: 62px; text-align: center; }
.note-text p {
  margin: 0 0 1.28em;
  color: var(--ink);
  font-size: clamp(17px, 1.75vw, 20px);
  line-height: 2.08;
  letter-spacing: 0.015em;
  text-align: justify;
  text-justify: inter-ideograph;
}
.note-text h2,
.note-text h3 {
  color: var(--ink-strong);
  font-weight: 500;
  line-height: 1.5;
}
.note-text h2 { margin: 3.2em 0 1.1em; font-size: clamp(25px, 3vw, 34px); }
.note-text h3 { margin: 2.6em 0 1em; font-size: clamp(20px, 2.3vw, 26px); }
.note-text blockquote {
  margin: 44px 0;
  padding: 24px 30px;
  border-left: 1px solid var(--accent);
  background: linear-gradient(90deg, rgba(var(--accent-rgb), 0.07), transparent 84%);
}
.note-text blockquote p { margin: 0; color: color-mix(in srgb, var(--accent) 68%, var(--ink-strong)); }
.note-text ul { margin: 30px 0 36px 1.25em; }
.note-text li { margin-bottom: 0.7em; padding-left: 0.45em; font-size: clamp(17px, 1.75vw, 20px); line-height: 1.9; }
.note-text hr { width: 72px; height: 1px; margin: 68px auto; border: 0; background: var(--line); }
.note-end {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 110px;
  color: var(--ink-dim);
  font: 9px/1.6 var(--mono);
  letter-spacing: 0.26em;
}
.note-end::before,
.note-end::after { height: 1px; flex: 1; background: var(--line); content: ""; }
.note-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 48px;
  font: 10px/1.7 var(--mono);
  letter-spacing: 0.12em;
}
.note-footer a { color: var(--ink-dim); text-decoration: none; }
.note-footer a:hover,
.note-footer a:focus-visible { color: var(--accent); }

.archive-main { width: min(100%, 1040px); }
.archive-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.archive-list { display: grid; }
.archive-entry {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px 30px;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: padding 0.25s ease, border-color 0.25s ease;
}
.archive-entry:hover { padding-right: 14px; padding-left: 14px; border-color: rgba(var(--accent-rgb), 0.46); }
.archive-number {
  grid-column: 1 / 3;
  color: var(--accent);
  font: 9px/1.7 var(--mono);
  letter-spacing: 0.2em;
}
.archive-entry h2 { color: var(--ink-strong); font-size: clamp(26px, 3.5vw, 40px); font-weight: 500; line-height: 1.3; }
.archive-entry time { align-self: center; color: var(--ink-dim); font: 10px/1.6 var(--mono); letter-spacing: 0.12em; }
.archive-entry p { max-width: 46em; color: var(--ink-dim); font: 14px/1.85 var(--sans); }

@media (max-width: 640px) {
  .reader-nav { padding: 18px 20px; }
  .note-cover,
  .archive-cover { min-height: 72svh; padding: 104px 24px 66px; }
  .note-cover h1,
  .archive-cover h1 { font-size: clamp(42px, 13vw, 62px); }
  .cover-summary { margin-top: 28px; text-align: left; }
  .note-main,
  .archive-main { padding: 76px 24px 110px; }
  .note-label { margin-bottom: 48px; }
  .note-text p { font-size: 17px; line-height: 2; text-align: left; }
  .note-footer { align-items: flex-start; flex-direction: column; }
  .archive-entry { grid-template-columns: 1fr; padding: 32px 0; }
  .archive-number { grid-column: 1; }
  .archive-entry time { grid-row: 4; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

@media print {
  .reader-nav,
  .reading-progress,
  .open-note,
  .note-footer { display: none; }
  body { background: #fff; color: #111; }
  .note-cover { min-height: auto; padding: 70px 0; }
  .note-main { width: 100%; padding: 40px 0; }
  .note-text p { color: #111; font-size: 12pt; }
}