/* 诗笺 site. Tokens are the app's (Shihua/UI/Theme.swift Palette): slip paper, ink, seal red; the dark pair is the app's dark pair. */
:root {
  --paper: #f2eadb;        /* the icon's paper */
  --slip: #eee4cd;         /* the app's slip */
  --card: #dfd5be;
  --ink: #1c1712;
  --ink2: #5e4b37;
  --seal: #b4281f;
  --seal-text: #f6e9d6;
  --rule: rgba(28, 23, 18, .16);
  --kai: "Kaiti SC", "STKaiti", "KaiTi", "AR PL UKai CN", "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14110d; --slip: #1a1612; --card: #292521; --ink: #ede3cc; --ink2: #a89a82;
    --seal: #c23a2f; --seal-text: #fbefe0; --rule: rgba(237, 227, 204, .18);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 17px/1.85 var(--sans); letter-spacing: .02em;
}
a { color: inherit; text-decoration-color: var(--seal); text-underline-offset: .25em; }
a:hover { color: var(--seal); }
.wrap { width: min(1080px, 100% - 40px); margin-inline: auto; }

/* header */
header.top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font: 26px/1 var(--kai); letter-spacing: .12em; }
.brand img { width: 44px; height: 44px; border-radius: 22%; display: block; }
nav.top a { margin-left: 22px; font-size: 15px; text-decoration: none; color: var(--ink2); }
nav.top a:hover { color: var(--seal); }

/* hero */
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; padding: 44px 0 72px; }
.hero h1 { margin: 0; font: 400 64px/1.1 var(--kai); letter-spacing: .2em; }
.hero .en { margin: 14px 0 0; color: var(--ink2); font-size: 15px; letter-spacing: .08em; }
.hero .lede { margin: 34px 0 0; font: 25px/1.7 var(--kai); max-width: 19em; }
.hero .lede em { font-style: normal; color: var(--seal); }
.store {
  display: inline-flex; align-items: center; gap: 12px; margin-top: 38px; padding: 13px 26px;
  border: 1px solid var(--ink); border-radius: 999px; text-decoration: none; font-size: 16px; letter-spacing: .08em;
}
.store::before { content: ""; width: 9px; height: 9px; background: var(--seal); border-radius: 50%; }
.store.soon { cursor: default; }
.store.soon:hover { color: inherit; }
.plain { margin: 18px 0 0; font-size: 14px; color: var(--ink2); letter-spacing: .08em; }
.plain b { font: 400 14px var(--kai); color: var(--ink); margin-right: 1em; letter-spacing: .12em; }

/* today's poem: a paper slip on the painting, vertical like the app */
.today { position: relative; margin: 0; }
/* mounted like a hanging picture: a paper mat all round, one thin rule, one shadow. Whatever the scan has at its edges (mount, scanner border, the
   hanging cord) stays outside the .art box: the page lays the picture out so that only the painting itself fills it (see the script in index.html). */
.frame {
  padding: 12px; background: var(--slip); border: 1px solid var(--rule); border-radius: 3px;
  box-shadow: 0 24px 48px -28px rgba(28, 23, 18, .55);
}
.art { position: relative; aspect-ratio: 4 / 5; overflow: hidden; background: #2b2a28; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .35); }
.art > img { position: absolute; left: 0; top: 0; width: 100%; height: 100%; object-fit: cover; display: block; max-width: none; }
.slip {
  position: absolute; top: 9%; right: 8%; max-height: 82%;
  display: flex; flex-direction: row-reverse; gap: 16px; align-items: flex-start;
  padding: 22px 20px; background: var(--slip); color: var(--ink); border-radius: 3px;
  font-family: var(--kai); box-shadow: 0 6px 18px -8px rgba(0, 0, 0, .5);
}
.slip .v { writing-mode: vertical-rl; letter-spacing: .12em; margin: 0; }
.slip .lines { font-size: 25px; line-height: 1.55; }
.slip .lines p { margin: 0; }
.slip .meta { font-size: 16px; line-height: 1.6; color: var(--ink2); display: flex; flex-direction: row-reverse; gap: 6px; }
.slip .meta .t { color: var(--ink); font-size: 18px; }
.slip .seal {
  align-self: flex-end; margin-top: 8px; width: 28px; height: 28px; display: grid; place-items: center;
  background: var(--seal); color: var(--seal-text); font: 15px/1 var(--kai); border-radius: 2px; writing-mode: horizontal-tb;
}
.slip .seal[hidden] { display: none; }
/* the button: a red seal that is pressed. Same colours as the seal, a little larger so a thumb finds it. */
.slip button.seal { width: 38px; height: 38px; border: 0; padding: 0; font-size: 20px; cursor: pointer; letter-spacing: 0; box-shadow: 0 0 0 1px rgba(0, 0, 0, .12); transition: transform .12s, background .12s; }
.slip button.seal:hover { transform: translateY(-1px); background: #c43228; }
.slip button.seal:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.slip button.seal[aria-pressed="true"] { background: var(--ink); color: var(--slip); }
.slip .on { color: var(--seal); transition: color .2s; }
.today .hint { display: block; margin-top: 2px; }
.today .hint[hidden] { display: none; }
.today figcaption { margin-top: 12px; font-size: 13px; line-height: 1.6; color: var(--ink2); }
.today .day { display: block; font: 15px/1.6 var(--kai); color: var(--ink); letter-spacing: .1em; margin-bottom: 2px; }

/* 赏析 of today's poem, under the hero and lined up with its two columns: the label on the left, the words under the painting. */
.read { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; padding: 0 0 72px; margin-top: -24px; }
.read[hidden] { display: none; }
.read-head h2 { margin: 0; font: 400 22px/1.4 var(--kai); letter-spacing: .12em; display: flex; align-items: center; gap: 12px; }
.read-head h2 b { display: grid; place-items: center; width: 30px; height: 30px; background: var(--seal); color: var(--seal-text); font: 400 18px/1 var(--kai); border-radius: 2px; letter-spacing: 0; }
.read-poem { margin: 10px 0 0 42px; font: 16px/1.7 var(--kai); letter-spacing: .1em; color: var(--ink2); }
.read-body { font-family: var(--kai); max-width: 30em; }
.read-body p { margin: 0; }
.read-body .open, .read-body .close { font-size: 19px; line-height: 1.95; color: var(--ink2); letter-spacing: .04em; }
.read-body .pairs { margin: 18px 0; }
.read-body .pair { margin: 0 0 14px; }
.read-body .l { font-size: 22px; line-height: 1.6; color: var(--ink); letter-spacing: .08em; }
.read-body .r { margin: 2px 0 0 16px; padding-left: 14px; border-left: 2px solid var(--rule); font-size: 17px; line-height: 1.9; color: var(--ink2); letter-spacing: .04em; }
.read-body .rest { display: none; }
.read.opened .read-body .rest { display: block; }
.read-body .more { margin: 4px 0 0; padding: 4px 0; border: 0; border-bottom: 1px solid var(--seal); background: none; color: var(--ink); font: 15px/1.6 var(--kai); letter-spacing: .2em; cursor: pointer; }
.read-body .more[hidden] { display: none; }
.read-body .more:hover { color: var(--seal); }
.read-body .more:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.read-body .more-app { margin-top: 26px; padding-top: 14px; border-top: 1px solid var(--rule); font: 13px/1.7 var(--sans); letter-spacing: .08em; color: var(--ink2); }

/* what it is */
section.what { border-top: 1px solid var(--rule); padding: 64px 0 24px; }
.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
.three h2 { margin: 0 0 14px; font: 400 22px/1.4 var(--kai); letter-spacing: .12em; display: flex; align-items: center; gap: 12px; }
.three h2 b {
  display: grid; place-items: center; width: 30px; height: 30px; background: var(--seal); color: var(--seal-text);
  font: 400 18px/1 var(--kai); border-radius: 2px; letter-spacing: 0;
}
.three p { margin: 0; color: var(--ink2); font-size: 16px; line-height: 1.95; }

/* the app on a phone */
section.shots { border-top: 1px solid var(--rule); padding: 64px 0 80px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.phones { display: grid; grid-template-columns: repeat(3, minmax(0, 260px)); gap: 40px; justify-content: center; }
.phones figure { margin: 0; text-align: center; }
.phones img { width: 100%; height: auto; display: block; border-radius: 28px; border: 1px solid var(--rule); box-shadow: 0 24px 40px -26px rgba(28, 23, 18, .55); background: var(--card); }
.phones figcaption { margin-top: 14px; font: 16px/1.6 var(--kai); letter-spacing: .12em; color: var(--ink2); }

/* footer */
footer { border-top: 1px solid var(--rule); padding: 30px 0 56px; font-size: 14px; line-height: 1.9; color: var(--ink2); }
footer .row { display: flex; flex-wrap: wrap; gap: 8px 28px; justify-content: space-between; }
footer a { color: var(--ink); }

/* plain pages (support) */
main.page { padding: 28px 0 80px; max-width: 40em; }
main.page h1 { font: 400 40px/1.3 var(--kai); letter-spacing: .14em; margin: 0 0 24px; }
main.page h2 { font: 400 22px/1.4 var(--kai); letter-spacing: .1em; margin: 44px 0 8px; }
main.page p { margin: 8px 0; }
/* the privacy policy: long, plain, in English as the source is */
main.page.legal { max-width: 46em; }
main.page.legal h1 { margin-bottom: 6px; }
main.page.legal .en { margin: 0 0 20px; color: var(--ink2); font-size: 15px; letter-spacing: .04em; }
main.page.legal h2 { font: 400 22px/1.4 var(--kai); margin-top: 38px; }
main.page.legal h3 { font: 600 16px/1.5 var(--sans); letter-spacing: 0; margin: 18px 0 4px; }
main.page.legal ul { margin: 8px 0; padding-left: 1.3em; }
main.page.legal li { margin: 4px 0; }
main.page.legal p, main.page.legal li { font-size: 16px; line-height: 1.8; letter-spacing: 0; }
/* the English half of a page: same words, below the Chinese */
main.page .second-block { margin-top: 64px; padding-top: 12px; border-top: 1px solid var(--rule); }
main.page .lang-en h1 { font-size: 32px; letter-spacing: .04em; }
main.page .lang-en h2 { letter-spacing: .02em; }
main.page .mail { font: 24px/1.6 var(--kai); letter-spacing: .06em; }

/* phone */
@media (max-width: 820px) {
  body { font-size: 16px; }
  .wrap { width: calc(100% - 32px); }
  header.top { padding: 16px 0; }
  .brand { font-size: 22px; } .brand img { width: 34px; height: 34px; }
  nav.top a { margin-left: 16px; }
  .hero { grid-template-columns: 1fr; gap: 36px; padding: 20px 0 48px; }
  .hero h1 { font-size: 48px; }
  .hero .lede { font-size: 21px; margin-top: 24px; }
  .store { margin-top: 28px; }
  .frame { padding: 9px; }
  .art { aspect-ratio: 1 / 1.08; }
  .slip { top: 7%; right: 6%; padding: 18px 16px; gap: 12px; }
  .slip .lines { font-size: 21px; }
  .slip button.seal { width: 36px; height: 36px; }
  .slip .meta { font-size: 14px; } .slip .meta .t { font-size: 16px; }
  .read { grid-template-columns: 1fr; gap: 16px; padding-bottom: 48px; margin-top: -12px; }
  .read-poem { margin-left: 42px; }
  .read-body .open, .read-body .close { font-size: 18px; }
  .read-body .l { font-size: 21px; }
  section.what { padding-top: 44px; }
  .three { grid-template-columns: 1fr; gap: 30px; }
  section.shots { padding: 40px 0 56px; }
  .phones { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; justify-content: flex-start; margin-inline: -16px; padding: 4px 16px 20px; }
  .phones figure { flex: 0 0 62%; max-width: 250px; scroll-snap-align: center; }
  main.page h1 { font-size: 32px; }
}