:root {
  --bg:#161e2b;
  --panel:#202b3b;
  --ink:#f5f0e8;
  --muted:#b6bdc8;
  --gold:#edc578;
  --line:#4b5260;
  --curtain:#662b3c;
}

* {
  box-sizing:border-box;
}

body {
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Microsoft YaHei","PingFang SC",sans-serif;
  min-width:300px;
}

button,a,input {
  -webkit-tap-highlight-color:transparent;
}

button,input {
  font:inherit;
}

button,a {
  touch-action:manipulation;
}

button {
  cursor:pointer;
}

button:disabled {
  opacity:.5;
  cursor:wait;
}

button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,[tabindex]:focus-visible {
  outline:3px solid var(--gold);
  outline-offset:5px;
}

a {
  color:inherit;
}

[hidden] {
  display:none!important;
}

.topbar {
  max-width:1180px;
  padding:27px 32px 20px;
  margin:auto;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
}

.brand {
  text-decoration:none;
  display:flex;
  align-items:center;
  gap:12px;
}

.brand>span {
  font-size:49px;
  color:var(--gold);
  line-height:1;
}

.brand h1 {
  font-family:Georgia,serif;
  font-size:26px;
  margin:0;
  font-weight:normal;
}

.brand p {
  font-size:12px;
  color:var(--muted);
  margin:3px 0 0;
}

.library {
  display:flex;
  align-items:center;
  gap:17px;
  font-size:13px;
  color:var(--muted);
}

.text-btn {
  border:0;
  padding:7px 0;
  background:none;
  color:var(--gold);
  text-decoration:underline;
  text-underline-offset:4px;
}

main {
  max-width:700px;
  margin:auto;
  padding:0 24px;
  text-align:center;
}

.invitation {
  margin:15px 0 24px;
}

.invitation h2 {
  font-family:"Songti SC",SimSun,Georgia,serif;
  font-size:clamp(23px,4vw,31px);
  font-weight:normal;
  margin:0 0 9px;
  letter-spacing:2px;
}

.invitation p {
  font-size:13px;
  color:var(--muted);
  margin:0;
}

.date-nav {
  display:flex;
  align-items:center;
  justify-content:center;
  gap:26px;
  margin-bottom:18px;
}

.date-nav>div {
  display:flex;
  align-items:center;
  gap:12px;
}

.date-nav label {
  font-size:12px;
  color:var(--gold);
}

input[type=date] {
  color-scheme:dark;
  background:transparent;
  color:var(--ink);
  border:0;
  font-size:13px;
  max-width:155px;
}

.nav-arrow {
  border:1px solid var(--line);
  border-radius:50%;
  background:transparent;
  color:var(--ink);
  width:34px;
  height:34px;
  font-size:25px;
  line-height:1;
}

.scene {
  perspective:1600px;
  width:100%;
  max-width:480px;
  height:570px;
  margin:auto;
  text-align:left;
}

.card {
  position:relative;
  width:100%;
  height:100%;
  transform-style:preserve-3d;
  transition:transform .65s cubic-bezier(.22,.72,.24,1);
}

.card.flipped {
  transform:rotateY(180deg);
}

.face {
  position:absolute;
  inset:0;
  border-radius:12px;
  overflow:hidden;
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
  background:var(--panel);
  box-shadow:0 20px 55px #0005;
  border:1px solid #ffffff1f;
}

.front {
  display:flex;
  flex-direction:column;
}

.hero {
  height:270px;
  flex-shrink:0;
  position:relative;
  background-color:var(--curtain);
  background-size:cover;
  background-position:center;
}

.hero-art {
  position:absolute;
  font-family:Georgia,serif;
  font-size:230px;
  line-height:1;
  right:25px;
  top:-15px;
  color:#edc5782e;
  user-select:none;
}

.hero.has-image .hero-art {
  display:none;
}

.hero-scrim {
  position:absolute;
  inset:0;
  background:linear-gradient(0deg,#111c2ef2,transparent 100%);
}

.hero-meta {
  position:absolute;
  bottom:22px;
  left:24px;
  right:24px;
}

.chip {
  font-size:11px;
  padding:4px 8px;
  color:var(--ink);
  border:1px solid #ffffff70;
  border-radius:3px;
  display:inline-block;
}

.hero h2 {
  font-family:Georgia,"Songti SC",SimSun,serif;
  font-weight:normal;
  font-size:clamp(25px,5vw,36px);
  line-height:1.14;
  margin:11px 0 9px;
  overflow-wrap:anywhere;
  max-height:164px;
  overflow-y:auto;
}

.hero-meta p {
  font-size:12px;
  color:#dddfe5;
  margin:0;
  line-height:1.6;
}

.front-body {
  flex:1;
  min-height:0;
  overflow-y:auto;
  padding:22px 24px;
  scrollbar-width:thin;
  scrollbar-color:#727987 transparent;
}

.section-heading {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
}

.section-heading h3 {
  font-size:13px;
  margin:0;
  color:var(--gold);
  font-weight:normal;
}

.source-tag {
  font-size:11px;
  color:var(--muted);
}

.intro {
  font-size:14px;
  line-height:1.9;
  white-space:pre-line;
  overflow-wrap:anywhere;
  margin:15px 0;
}

.source-links {
  display:flex;
  gap:15px;
  flex-wrap:wrap;
  font-size:11px;
  color:var(--muted);
  margin-top:20px;
}

.source-links a {
  text-underline-offset:4px;
}

details {
  font-size:12px;
  color:var(--muted);
}

summary {
  cursor:pointer;
}

.back {
  transform:rotateY(180deg);
  background:#342532;
}

.back-inner {
  height:100%;
  overflow:auto;
  padding:30px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  text-align:center;
}

.back-symbol {
  color:var(--gold);
  font-size:50px;
}

.back h2 {
  font-family:Georgia,SimSun,serif;
  font-size:28px;
  font-weight:normal;
  margin:8px 0;
  overflow-wrap:anywhere;
}

.back-inner>p {
  font-size:13px;
  color:var(--muted);
}

.back-links {
  display:flex;
  flex-direction:column;
  width:100%;
  gap:10px;
  margin:15px 0;
}

.btn {
  text-decoration:none;
  border:1px solid #76606e;
  padding:14px 17px;
  border-radius:5px;
  font-size:14px;
  display:flex;
  justify-content:space-between;
}

.btn:hover {
  background:#ffffff0d;
}

.btn.official {
  background:var(--gold);
  color:#221d1a;
  border-color:var(--gold);
}

.back-inner .back-note {
  font-size:11px;
  line-height:1.8;
}

.card-status {
  min-height:37px;
  font-size:11px;
  color:var(--muted);
  padding:12px 0 8px;
}

.actions {
  display:flex;
  justify-content:center;
  gap:10px;
  flex-wrap:wrap;
}

.primary-btn,.secondary-btn {
  border-radius:5px;
  border:1px solid var(--line);
  padding:11px 16px;
  font-size:13px;
}

.primary-btn {
  background:var(--gold);
  color:#271f13;
  border-color:var(--gold);
  font-weight:bold;
  min-width:145px;
}

.primary-btn span {
  font-size:18px;
  margin-left:10px;
}

.secondary-btn {
  background:transparent;
  color:var(--ink);
}

.primary-btn:hover {
  background:#f8d89e;
}

.secondary-btn:hover,.nav-arrow:hover {
  background:#ffffff0d;
}

.notice {
  color:#ffcfb7;
  font-size:13px;
  margin:10px 0 0;
}

.notice:empty {
  display:none;
}

.retry {
  display:block;
  margin:auto;
}

.draw-note {
  font-size:11px;
  color:var(--muted);
  line-height:1.9;
  margin:18px 0 26px;
}

footer {
  text-align:center;
  padding:5px 20px 22px;
  font-size:11px;
  color:var(--muted);
  line-height:1.7;
}

footer p {
  margin:5px 0;
}

.card.loading {
  opacity:.6;
}

@media(min-width:1000px) and (min-height:850px) {
  .invitation {
    margin-top:25px;
  }
  .scene {
    height:590px;
  }
  .hero {
    height:290px;
  }
}

@media(max-width:540px) {
  .topbar {
    padding:20px;
    align-items:flex-start;
  }
  .brand h1 {
    font-size:22px;
  }
  .brand>span {
    font-size:40px;
  }
  .library {
    flex-direction:column;
    align-items:flex-end;
    gap:0;
    font-size:11px;
  }
  .text-btn {
    font-size:11px;
  }
  .invitation {
    margin:15px 0 20px;
  }
  .invitation h2 {
    letter-spacing:0;
  }
  .scene {
    height:550px;
  }
  .hero {
    height:250px;
  }
  .hero-meta {
    left:20px;
    right:20px;
  }
  .front-body {
    padding:20px;
  }
  .actions {
    gap:8px;
  }
  .primary-btn,.secondary-btn {
    padding:11px 12px;
    font-size:12px;
  }
  .primary-btn {
    min-width:120px;
  }
  .date-nav {
    gap:15px;
  }
  .date-nav>div {
    gap:8px;
  }
}

@media(prefers-reduced-motion:reduce) {
  *,*::before,*::after {
    animation:none!important;
    transition:none!important;
    scroll-behavior:auto!important;
  }
}