/* ————————————————————————————————————————————
   拾光集 · Collected Light
   纸上印相册:冷灰纸底 / 白卡装裱 / 等宽档案字 / 竖排书脊
   ———————————————————————————————————————————— */

@font-face {
  font-family: "Space Mono";
  src: url("fonts/space-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Space Mono";
  src: url("fonts/space-mono-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Space Mono";
  src: url("fonts/space-mono-400-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

:root {
  --paper: #e6e8e5;
  --card: #ffffff;
  --ink: #17191c;
  --mute: #5c6167;
  --navy: #2e4162;
  --halo: #d9a62e;
  --room: #0f1013;
  --room-ink: #e9ebe6;
  --room-mute: #9aa0ab;
  --gap: clamp(24px, 3.2vw, 40px);
  --mono: "Space Mono", ui-monospace, "SF Mono", Menlo, Consolas,
          "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
          "Noto Sans CJK SC", "Microsoft YaHei", monospace;
  --cjk: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
         "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--navy); color: #fff; }

:focus-visible { outline: 2px solid var(--navy); outline-offset: 3px; }
.room :focus-visible { outline-color: var(--halo); }

[v-cloak] { display: none !important; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

img { display: block; }

.shell {
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: clamp(20px, 4.5vw, 64px);
}

/* ———— 封面 ———— */

.cover {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  justify-content: space-between;
  gap: 32px;
  padding-block: clamp(28px, 5vh, 72px);
}

.spine {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(18px, 3vh, 30px);
  animation: rise 0.8s ease both;
}

.halo {
  display: block;
  width: clamp(46px, 6.5vmin, 68px);
  height: clamp(26px, 3.8vmin, 40px);
  border: 4px solid var(--halo);
  border-radius: 50%;
  transform: rotate(-12deg);
  animation: float-halo 5.5s ease-in-out infinite alternate;
}

.spine-title {
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--cjk);
  font-weight: 300;
  font-size: clamp(72px, 16vmin, 152px);
  letter-spacing: 0.22em;
  line-height: 1;
  color: var(--ink);
}

.cover-meta {
  align-self: flex-end;
  text-align: right;
  animation: rise 0.8s 0.18s ease both;
}

.kicker {
  margin: 0 0 10px;
  font-weight: 700;
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--navy);
}

.cover-sub {
  margin: 0 0 34px;
  font-family: var(--cjk);
  font-weight: 400;
  font-size: 15px;
  color: var(--ink);
}

.facts { margin: 0 0 42px; }

.fact {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
}
.fact dt { color: var(--mute); }
.fact dd { margin: 0; min-width: 21ch; text-align: left; }

.begin {
  display: inline-block;
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.12em;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 3px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.begin:hover { color: var(--navy); border-color: var(--navy); }

/* ———— 图版目录 ———— */

#plates { padding-block: clamp(40px, 7vh, 96px) clamp(72px, 10vh, 140px); }

.plates-label {
  margin: 0 0 clamp(24px, 4vh, 44px);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--mute);
}

.empty {
  margin: 48px 0;
  color: var(--mute);
  font-family: var(--cjk);
  font-size: 14px;
}

.plates {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 1;
  column-gap: var(--gap);
}

.plate {
  break-inside: avoid;
  margin: 0 0 var(--gap);
}

.js .plate {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.js .plate.seen { opacity: 1; transform: none; }

.print { margin: 0; }

.mount {
  display: block;
  width: 100%;
  padding: clamp(10px, 1.4vw, 16px);
  background: var(--card);
  cursor: zoom-in;
  box-shadow: 0 1px 2px rgba(23, 25, 28, 0.07),
              0 12px 32px -14px rgba(23, 25, 28, 0.22);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.mount:hover {
  transform: translateY(-3px);
  box-shadow: 0 2px 3px rgba(23, 25, 28, 0.07),
              0 18px 44px -14px rgba(23, 25, 28, 0.3);
}
.mount img { width: 100%; height: auto; }

.plate-cap {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mute);
}
.plate-cap .no { font-weight: 700; color: var(--ink); }
.plate-cap .etc { margin-left: auto; }
.plate:hover .plate-cap .no { color: var(--navy); }

/* ———— 暗室灯箱 ———— */

.room {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(14px, 2.6vw, 36px);
  background: var(--room);
  color: var(--room-ink);
}

.room-bar,
.room-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex: none;
}

.counter,
.room-cap {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--room-mute);
}

.room-stage {
  flex: 1;
  min-height: 0;
  display: grid;
  /* 显式定高的行列轨道,保证图片的 max-height:100% 有确定的参照 */
  grid-template-rows: 100%;
  grid-template-columns: 100%;
  place-items: center;
  overflow: hidden;
}
.room-stage img {
  grid-area: 1 / 1;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: 0 24px 80px -20px rgba(0, 0, 0, 0.8);
}
.room-ghost { opacity: 0.85; }

.x,
.room-nav button {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(233, 235, 230, 0.28);
  border-radius: 999px;
  color: var(--room-ink);
  font-size: 16px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}
.x:hover,
.room-nav button:hover {
  background: rgba(233, 235, 230, 0.12);
  border-color: rgba(233, 235, 230, 0.5);
}
.room-nav { display: inline-flex; gap: 10px; }

.room-enter-active, .room-leave-active { transition: opacity 0.25s ease; }
.room-enter-from, .room-leave-to { opacity: 0; }
.room-enter-active .room-stage { transition: transform 0.25s ease; }
.room-enter-from .room-stage { transform: scale(0.985); }

/* ———— 版权页 ———— */

.colophon {
  padding-block: clamp(56px, 9vh, 120px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.halo-end {
  width: 30px;
  height: 17px;
  border-width: 3px;
  margin-bottom: 26px;
  animation: none;
}

.c-label {
  margin: 0 0 22px;
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--mute);
}

.c-facts { margin: 0 0 30px; }
.c-facts div {
  display: flex;
  gap: 18px;
  justify-content: center;
  font-size: 12.5px;
  line-height: 2.1;
}
.c-facts dt { color: var(--mute); }
.c-facts dd { margin: 0; }

.c-foot {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mute);
}

/* ———— 动效 ———— */

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

@keyframes float-halo {
  from { transform: rotate(-12deg) translateY(0); }
  to   { transform: rotate(-12deg) translateY(5px); }
}

/* ———— 响应式 ———— */

@media (min-width: 680px) {
  .plates { columns: 2; }
}
@media (min-width: 1140px) {
  .plates { columns: 3; }
}

@media (max-width: 560px) {
  .cover { flex-direction: column; }
  .cover-meta { align-self: flex-start; text-align: left; }
  .fact { justify-content: flex-start; }
  .fact dd { min-width: 0; }
  .room { padding: 12px; }
}

/* ———— 降低动效 ———— */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .spine, .cover-meta, .halo { animation: none; }
  .js .plate { opacity: 1; transform: none; transition: none; }
  .mount, .begin { transition: none; }
  .mount:hover { transform: none; }
  .room-enter-active, .room-leave-active,
  .room-enter-active .room-stage { transition: none; }
}