/* A reader-initiated letter on the legacy homepage and its archive pages. */
.reader-letter {
  --rl-paper: #fff0f7;
  --rl-wash: #f4dbea;
  --rl-ink: #7a3d67;
  --rl-soft: #825579;
  --rl-rose: #96376e;
  --rl-line: #dfb5d0;
  --rl-serif: 'Kaiti SC', 'STKaiti', 'KaiTi', 'LXGW WenKai', Georgia, 'Microsoft YaHei', serif;
  font-family: var(--rl-serif);
  color: var(--rl-ink);
  box-sizing: border-box;
}
.reader-letter *, .reader-letter *::before, .reader-letter *::after { box-sizing: border-box; }
.reader-letter-launch { display: flex; align-items: center; justify-content: center; gap: 16px; margin: -.75rem 0 1.25rem; text-align: center; }
.reader-letter-launch::before, .reader-letter-launch::after { content: ''; flex: 1; height: 1px; background: linear-gradient(to right, transparent, #d98fa480); }
.reader-letter-launch::after { background: linear-gradient(to left, transparent, #d98fa480); }
.reader-letter-launch [hidden] { display: none !important; }
.reader-letter-trigger {
  appearance: none; position: relative; display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto;
  min-width: 70px; min-height: 48px; border: 0; border-radius: 0.65rem; padding: 7px 10px;
  background: transparent; color: var(--rl-rose); font: inherit; line-height: 1.4;
  cursor: pointer; -webkit-tap-highlight-color: transparent; touch-action: manipulation;
}
.reader-letter-trigger > span:last-child {
  position: absolute; z-index: 2; bottom: calc(100% + 7px); left: 50%; width: max-content; max-width: 220px;
  padding: 7px 12px; border: 1px solid #dfb5d070; border-radius: 6px; background: #fff5fa;
  box-shadow: 0 3px 14px #87466e12; opacity: 0; transform: translate(-50%, 4px); pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}
.reader-letter-trigger:is(:hover, :focus-visible) > span:last-child { opacity: 1; transform: translate(-50%, 0); }
.reader-letter-trigger:focus-visible, .reader-letter-close:focus-visible, .reader-letter-fold:focus-visible {
  outline: 2px solid var(--rl-rose); outline-offset: 5px;
}
.reader-letter-envelope {
  display: block; position: relative; width: 50px; height: 34px; margin: 0;
  isolation: isolate; perspective: 420px;
  transition: transform 420ms cubic-bezier(.2,.7,.2,1), filter 420ms;
  filter: drop-shadow(0 5px 5px #9e59641b);
}
.reader-letter-envelope__back { position: absolute; inset: 0; border: 1px solid #cd94b7; border-radius: 4px; background: #efcede; }
.reader-letter-envelope__paper {
  position: absolute; inset: 4px 6px 3px; border: 1px solid #ecd9d4; border-radius: 2px;
  background: #fffbf5; transition: transform 420ms cubic-bezier(.2,.7,.2,1); z-index: 1;
}
.reader-letter-envelope__paper::before {
  content: ''; position: absolute; inset: 6px 5px 6px;
  background: repeating-linear-gradient(to bottom, #cfaeba80 0, #cfaeba80 1px, transparent 1px, transparent 5px);
}
.reader-letter-envelope__front { position: absolute; inset: 0; z-index: 3; border-radius: 3px; background: linear-gradient(150deg, #f5d5e8, #e4bfdc); clip-path: polygon(0 0, 50% 53%, 100% 0, 100% 100%, 0 100%); }
.reader-letter-envelope__front::after { content: ''; position: absolute; inset: 0; background: #f7dfed; clip-path: polygon(0 100%, 50% 46%, 100% 100%); }
.reader-letter-envelope__flap {
  position: absolute; inset: 0 0 auto; height: 20px; z-index: 4;
  background: linear-gradient(#f7dfea, #dfb8d3); clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: center top; transition: transform 400ms cubic-bezier(.2,.7,.2,1), opacity 280ms;
  backface-visibility: hidden;
}
.reader-letter-envelope__seal {
  position: absolute; z-index: 5; width: 12px; height: 12px; border-radius: 50%; left: 19px; top: 14px;
  background: #984779; color: #fff0f5; box-shadow: inset 0 0 0 2px #c589aa99, 0 1px 2px #8c486a24;
  display: grid; place-items: center; transition: opacity 180ms, transform 320ms;
}
.reader-letter-envelope__seal svg { width: 8px; height: 8px; display: block; }
.reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope { transform: translateY(-3px) rotate(-2deg); filter: drop-shadow(0 8px 7px #9e596429); }
.reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope__flap { transform: rotateX(165deg); opacity: 0.65; }
.reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope__paper { transform: translateY(-8px); transition-delay: 80ms; }
.reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope__seal { opacity: 0; transform: translateY(-4px) scale(.85); }
.reader-letter-trigger:active .reader-letter-envelope { transform: translateY(-1px) scale(.96); }
.reader-letter-trigger__zh { display: block; font-size: 14px; letter-spacing: .08em; }
.reader-letter-trigger__en { display: block; color: var(--rl-soft); font-family: Georgia, serif; font-size: 11px; letter-spacing: .03em; margin-top: 2px; font-style: italic; }
html.reader-letter-is-open, html.reader-letter-is-open body { overflow: hidden !important; overscroll-behavior: none; }
dialog.reader-letter-dialog {
  position: fixed; inset: 0; margin: auto; padding: 0; border: 1px solid var(--rl-line);
  width: min(1080px, calc(100% - 64px)); max-width: none;
  height: min(920px, calc(100vh - 64px)); height: min(920px, calc(100dvh - 64px));
  max-height: none; border-radius: 3px 42px 3px 3px; background: linear-gradient(155deg, #fff0f7, #fcebf5 58%, #f5e8f8); overflow: hidden;
  box-shadow: 0 28px 100px #58305540, 0 5px 15px #87466e26, inset 0 0 0 5px #fff7fb70;
  text-align: left; font-size: 16px; line-height: 1.8;
}
/* A turned paper corner and a fine inner edge keep the silhouette letter-like. */
dialog.reader-letter-dialog::before {
  content: ''; position: absolute; z-index: 2; top: 0; right: 0; width: 42px; height: 42px;
  border-radius: 0 0 0 3px; pointer-events: none;
  background: linear-gradient(45deg, #d4adc9, #f5dfed 49%, #b68bab 50%, #edd4e6 53%, #fff2f8);
  box-shadow: -3px 4px 8px #81466e16;
}
dialog.reader-letter-dialog::after {
  content: ''; position: absolute; inset: 7px; border: 1px solid #d5a8c538;
  border-radius: 1px 34px 1px 1px; pointer-events: none;
}
dialog.reader-letter-dialog:not([open]) { display: none; }
dialog.reader-letter-dialog[open] { display: flex; flex-direction: column; transform-origin: center top; animation: reader-letter-arrive 650ms cubic-bezier(.2,.7,.2,1) both; }
dialog.reader-letter-dialog::backdrop { background: #59355266; backdrop-filter: blur(5px); animation: reader-letter-veil 260ms ease-out both; }
dialog.reader-letter-dialog[data-closing] { animation: reader-letter-leave 170ms ease-in both; }
dialog.reader-letter-dialog[data-closing]::backdrop { animation: reader-letter-veil-away 170ms ease-in both; }
.reader-letter-toolbar {
  display: flex; align-items: center; justify-content: space-between; flex: 0 0 auto;
  gap: 18px; margin: 0 28px; padding: 18px 24px 12px 18px; border-bottom: 1px solid #dfb5d085;
  color: var(--rl-soft); background: transparent;
}
.reader-letter-reveal-hint { flex: 1; margin: 0; text-align: center; color: #885775; opacity: 0; pointer-events: none; font-size: 12px; line-height: 1.6; }
.reader-letter-reveal-hint span { display: block; }
.reader-letter-reveal-hint [lang="en"] { font: italic 11px/1.6 Georgia, serif; }
[data-revealing] .reader-letter-reveal-hint { opacity: 1; }
.reader-letter-season { font-size: 13px; line-height: 1.5; letter-spacing: .1em; color: #8b4275; }
.reader-letter-season span { display: block; }
.reader-letter-season [lang="en"] { font-family: Georgia, serif; font-size: 11px; letter-spacing: .02em; font-style: italic; }
.reader-letter-close {
  display: grid; place-items: center; width: 44px; height: 44px; flex: 0 0 44px;
  border: 0; border-radius: 50%; background: transparent; color: var(--rl-soft); cursor: pointer;
  transition: background 180ms, color 180ms;
}
.reader-letter-close:hover { color: var(--rl-rose); background: var(--rl-wash); }
.reader-letter-close svg { width: 19px; height: 19px; }
.reader-letter-scroll {
  overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: #d4a2c3 transparent;
  min-height: 0; flex: 1; padding: 38px 72px 40px;
  background-image: url('/reader-letter/watermarks.svg?v=20260929-2'), repeating-linear-gradient(to bottom, transparent 0, transparent 318px, #b980a914 320px, #fffbff80 322px, transparent 325px, transparent 640px);
  background-size: 620px 760px, 100% 640px; background-attachment: local;
}
.reader-letter-dialog .reader-letter-scroll > * { max-width: 820px; margin-left: auto; margin-right: auto; }
.reader-letter-scroll:focus-visible { outline: 1px solid var(--rl-line); outline-offset: -4px; }
/* Opacity preserves both the reading layout and access to the complete text. */
.reader-letter-reveal-unit { opacity: 1; transform: none; transition: none; }
[data-revealing] .reader-letter-reveal-unit {
  opacity: 0; transform: translateY(9px);
}
[data-revealing] .reader-letter-reveal-unit.is-revealed {
  opacity: 1; transform: none;
  transition: opacity 1000ms ease, transform 1000ms cubic-bezier(.2,.65,.3,1);
}
.reader-letter-dialog h2, .reader-letter-page h1 {
  font-family: var(--rl-serif); font-size: clamp(29px, 3vw, 36px); font-weight: 500;
  line-height: 1.55; letter-spacing: .07em; color: #883569; margin: 0; border: 0; padding: 0;
}
.reader-letter-dialog h2:focus { outline: none; }
.reader-letter-title-en { display: block; margin: 5px 0 20px; font-family: Georgia, serif; font-size: 16px; color: #90537e; font-style: italic; }
.reader-letter-heading::after { content: ''; display: block; width: 138px; height: 20px; margin-bottom: 24px; background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 138 20'%3E%3Cpath d='M0 10h52m34 0h52' stroke='%23d5a1c0' stroke-width='.8'/%3E%3Cpath d='M69 15s-7-4.5-7-8c0-4 5-4 7-1 2-3 7-3 7 1 0 3.5-7 8-7 8Z' fill='none' stroke='%23b97b9e' stroke-width='1'/%3E%3C/svg%3E") center / contain no-repeat; }
.reader-letter-pair { margin: 0 0 20px; padding: 0; }
.reader-letter-pair > p { margin: 0; padding: 0; text-align: left; text-indent: 0; }
.reader-letter-pair > [lang="zh-CN"] { font-family: var(--rl-serif); font-size: 18px; line-height: 1.9; letter-spacing: .02em; color: var(--rl-ink); }
.reader-letter-pair > [lang="en"] { font-family: Georgia, 'Iowan Old Style', serif; font-size: 15px; line-height: 1.8; color: var(--rl-soft); margin-top: 7px; }
.reader-letter-passage { margin: 0 0 30px; }
.reader-letter-passage:last-of-type { margin-bottom: 0; }
.reader-letter-signature { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--rl-line); text-align: right; }
.reader-letter-signature .reader-letter-pair { margin-bottom: 12px; }
.reader-letter-signature .reader-letter-pair > p { text-align: right; }
.reader-letter-signature .reader-letter-pair:first-child > [lang="zh-CN"] { font-size: 25px; letter-spacing: .17em; color: #96376e; }
.reader-letter-signature time { display: block; color: var(--rl-soft); font-size: 12px; line-height: 1.9; }
.reader-letter-signature time span { display: block; }
.reader-letter-actions { display: flex; justify-content: center; margin: 30px 0 0; }
.reader-letter-fold { color: var(--rl-rose); border: 1px solid var(--rl-line); border-radius: 40px; padding: 10px 28px; font: inherit; line-height: 1.5; background: transparent; cursor: pointer; transition: background 180ms; }
.reader-letter-fold:hover { background: var(--rl-wash); }
.reader-letter-fold span { display: block; font-size: 13px; }
.reader-letter-fold [lang="en"] { font-size: 11px; font-style: italic; color: var(--rl-soft); }
.reader-letter-page { width: min(1000px, calc(100% - 32px)); margin: 40px auto; padding: 56px 72px; background: url('/reader-letter/watermarks.svg?v=20260929-2') 0 0 / 620px 760px repeat, linear-gradient(155deg, #fff0f7, #fcebf5 58%, #f5e8f8); border: 1px solid var(--rl-line); border-radius: 3px 36px 3px 3px; box-shadow: 0 14px 60px #87466e18; }
.reader-letter-page a { color: var(--rl-rose); }
@keyframes reader-letter-arrive { from { opacity: 0; transform: perspective(1400px) translateY(20px) rotateX(-5deg) scale(.97, .94); } to { opacity: 1; transform: none; } }
@keyframes reader-letter-leave { to { opacity: 0; transform: translateY(6px) scale(.99); } }
@keyframes reader-letter-veil { from { opacity: 0; } to { opacity: 1; } }
@keyframes reader-letter-veil-away { to { opacity: 0; } }
@media (max-width: 600px) {
  dialog.reader-letter-dialog { width: calc(100% - 20px); height: calc(100vh - 28px); height: calc(100dvh - 28px); border-radius: 3px 28px 3px 3px; }
  dialog.reader-letter-dialog::before { width: 28px; height: 28px; }
  dialog.reader-letter-dialog::after { inset: 5px; border-radius: 1px 24px 1px 1px; }
  .reader-letter-scroll { padding: 26px 24px 24px; }
  .reader-letter-toolbar { margin: 0 14px; padding: 14px 8px 10px; gap: 10px; }
  .reader-letter-season { flex: 0 0 auto; font-size: 12px; }
  .reader-letter-season [lang="en"] { font-size: 10px; }
  .reader-letter-reveal-hint { font-size: 11px; }
  .reader-letter-reveal-hint [lang="en"] { font-size: 9px; }
  .reader-letter-pair > [lang="zh-CN"] { font-size: 18px; }
  .reader-letter-pair > [lang="en"] { font-size: 15px; }
  .reader-letter-page { margin: 16px auto; padding: 26px 24px; }
}
@media (max-width: 380px) { .reader-letter-reveal-hint [lang="en"] { display: none; } }
@media (prefers-reduced-motion: reduce) {
  .reader-letter *, .reader-letter *::before, .reader-letter *::after,
  dialog.reader-letter-dialog, dialog.reader-letter-dialog::backdrop {
    animation: none !important; transition: none !important; scroll-behavior: auto !important;
  }
  .reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope,
  .reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope__paper,
  .reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope__flap { transform: none; opacity: 1; }
  .reader-letter-trigger:is(:hover, :focus-visible) .reader-letter-envelope__seal { opacity: 1; transform: none; }
  [data-revealing] .reader-letter-reveal-unit { opacity: 1; transform: none; }
  [data-revealing] .reader-letter-reveal-hint { opacity: 0; }
}