/* V19 Letter：一栏窄排的信，暖灰纸色；页面上唯一会动的是一个会学习的光点 */
:root {
  --bg: #f5f3ee; --ink: #24221e; --ink2: #57534a; --muted: #938f84; --line: #e0dcd2; --acc: #9a6a35;
  --serif: "Newsreader", Georgia, serif; --sans: "Hanken Grotesk", system-ui, sans-serif;
  --pm-bg: #ebe8e1; --pm-ph-bg: #ebe8e1; --pm-ph-ink: var(--muted);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 18px/1.75 var(--serif); -webkit-font-smoothing: antialiased; }
a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--line); text-decoration-thickness: 1px; text-underline-offset: 4px; transition: text-decoration-color .2s, color .2s; }
a:hover { text-decoration-color: var(--acc); color: var(--acc); }
:focus-visible { outline: 1px solid var(--acc); outline-offset: 4px; }
canvas.agent { position: fixed; inset: 0; width: 100vw; height: 100vh; pointer-events: none; z-index: 0; }
.letter { position: relative; z-index: 1; max-width: 620px; margin: 0 auto; padding: 0 24px; }
.top { display: flex; justify-content: space-between; padding: 34px 0 0; font: 400 14px var(--sans); color: var(--muted); }
.top a { color: var(--muted); text-decoration: none; margin-left: 18px; }
.top a:hover, .top a[aria-current] { color: var(--ink); }

[data-reveal] { opacity: 0; transition: opacity 1.2s ease; transition-delay: calc(var(--d, 0) * 120ms); }
[data-reveal].in { opacity: 1; }

.opening { padding: 18vh 0 10vh; }
.opening .who { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; }
.opening h1 { margin: 0; font: 300 clamp(46px, 7vw, 68px)/1 var(--serif); letter-spacing: -.02em; }
.opening .img { width: 74px; height: 96px; flex: none; background: #fff center 22% / cover; filter: saturate(.85); }
.opening .st { margin: 40px 0 18px; font-size: 21px; line-height: 1.6; }
.opening .aff { margin: 0; font: 400 15px/1.7 var(--sans); color: var(--ink2); }
.contacts { margin-top: 26px; font: 400 14.5px var(--sans); }
.contacts a, .contacts button { color: var(--ink2); text-decoration: none; margin-right: 18px; display: inline-flex; gap: 7px; align-items: center; }
.contacts a:hover, .contacts button:hover { color: var(--acc); }
.contacts i { color: var(--muted); font-size: 13px; }

h2 { font: 500 12.5px var(--sans); letter-spacing: .18em; text-transform: uppercase; color: var(--muted); margin: 0 0 18px; }
section { padding: 6vh 0; }
.lately { list-style: none; margin: 0; padding: 0; }
.lately li { margin-bottom: 10px; }
.lately time { font: 400 13px var(--sans); color: var(--muted); display: inline-block; width: 74px; }
.filters { font: 400 14.5px var(--sans); color: var(--muted); margin: -6px 0 22px; display: flex; flex-wrap: wrap; gap: 4px 16px; position: relative; }
.filters button { border: 0; background: none; padding: 0; font: inherit; color: var(--muted); cursor: pointer; }
.filters button:hover { color: var(--ink); }
.filters button[aria-selected="true"] { color: var(--ink); text-decoration: underline; text-underline-offset: 5px; text-decoration-color: var(--acc); }
.filters button sup { display: none; }
.tab-ind { display: none; }
.work { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 20px; padding: 18px 0; border-top: 1px solid var(--line); animation: fadein .7s ease both; animation-delay: calc(var(--i) * 70ms); }
@keyframes fadein { from { opacity: 0; } }
.work .pm { aspect-ratio: 4 / 3; }
.work h3 { margin: 0; font: 500 19px/1.35 var(--serif); }
.work .v { font: 400 13px var(--sans); color: var(--muted); }
.work p { margin: 4px 0; font-size: 16.5px; color: var(--ink2); }
.work .au { font: 400 13px/1.5 var(--sans); color: var(--muted); }
.work .au .me, .cv .me { color: var(--ink); font-weight: 500; }
.work .ln { font: 400 13.5px var(--sans); margin-top: 6px; }
.work .ln a { margin-right: 14px; }
.path p { margin: 0 0 8px; display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 0 10px; }
.path time { font: 400 13px var(--sans); color: var(--muted); padding-top: 4px; }
.sign { padding: 8vh 0 12vh; font-style: italic; color: var(--ink2); }
.sign small { display: block; font: 400 13px var(--sans); color: var(--muted); font-style: normal; margin-top: 6px; }
.cv .row { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 14px; padding: 8px 0; border-top: 1px solid var(--line); }
.cv time { font: 400 13px var(--sans); color: var(--muted); padding-top: 3px; }
.cv small { display: block; font: 400 14px var(--sans); color: var(--ink2); }
@media (max-width: 560px) { .work { grid-template-columns: 1fr; gap: 10px; } .work .pm { max-width: 260px; } .lately time { display: block; width: auto; } .path p { grid-template-columns: 1fr; } .cv .row { grid-template-columns: 1fr; gap: 0; } .opening { padding-top: 10vh; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } [data-reveal] { opacity: 1; transition: none; } .work { animation: none; } }