/* Temporary Sunlei portfolio refinement, based on the existing v45 catalogue. */
:root {
  --paper: #f0efe9;
  --ink: #292d29;
  --muted: #74766e;
  --polaris-ease: cubic-bezier(.2, .85, .3, 1);
  --polaris-spring: cubic-bezier(.34, 1.16, .64, 1);
}

html { scroll-padding-top: 82px; }
body { background: var(--paper); color: var(--ink); }
header {
  height: 80px;
  padding-inline: 5.2% 3.4%;
  background: rgba(240, 239, 233, .91);
  border-bottom-color: rgba(42, 46, 41, .08);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
  backdrop-filter: blur(18px) saturate(120%);
}
.brand-en { font-size: 29px; letter-spacing: -1.55px; }
.brand-cn { border-left: 1px solid #92958e; }

/* One clear brand separator; the bilingual nav remains compact and grouped. */
@media (min-width: 1001px) {
  #main-navigation {
    width: min(75vw, 1280px);
    gap: clamp(12px, 1.2vw, 20px);
  }
  #main-navigation .nav-core { gap: clamp(8px, .8vw, 13px); }
  #main-navigation .nav-divider { display: none !important; }
  #main-navigation .nav-collections {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: clamp(7px, .8vw, 13px);
  }
  #main-navigation .nav-collections a:first-child {
    border-left: 0 !important;
    padding-left: 0 !important;
    margin-left: 0 !important;
  }
  #main-navigation .nav-cn { font-size: 13px; letter-spacing: .09em; }
  #main-navigation .nav-en {
    max-width: 19ch;
    font-size: 8.5px;
    line-height: 1.3;
    letter-spacing: .055em;
    overflow-wrap: normal;
    text-wrap: balance;
  }
  #main-navigation .nav-core a { min-width: 46px; }
}

/* Desktop opening: an uninterrupted horizontal photograph fills the first screen. */
@media (min-width: 1001px) {
  .hero {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100svh;
    min-height: 620px;
    padding: 80px 0 0;
    overflow: hidden;
    background: #171917;
  }
  .hero-frame {
    width: 100%;
    height: 100%;
    max-width: none;
    min-height: 0;
    flex: 1 1 auto;
    margin: 0;
    animation: none;
  }
  .hero-photo,
  .hero-picture { width: 100%; height: 100%; }
  .hero-photo {
    border-radius: 0;
    box-shadow: none;
    background: #171917;
  }
  .hero-photo img {
    width: 100%;
    height: 100%;
    max-height: none;
    object-fit: cover;
    object-position: var(--hero-focus, center 50%);
    background: #171917;
  }
  .hero::after {
    position: absolute;
    z-index: 1;
    right: 0;
    bottom: 0;
    left: 0;
    height: 150px;
    background: linear-gradient(transparent, rgba(13, 15, 14, .56));
    content: "";
    pointer-events: none;
  }
  .hero-foot {
    position: absolute;
    z-index: 2;
    right: 4.8%;
    bottom: 0;
    left: 4.8%;
    width: auto;
    max-width: none;
    margin: 0;
    padding: 18px 0 max(22px, env(safe-area-inset-bottom));
    color: rgba(255, 255, 255, .9);
    text-shadow: 0 1px 9px #0009;
  }
  .hero-foot a { color: inherit; }
  .hero-playback { gap: clamp(20px, 2.1vw, 34px); }
  .hero-playback > span { color: rgba(255, 255, 255, .74); }
  .hero-playback button {
    color: #fff;
    transition: opacity 160ms var(--polaris-ease), transform 160ms var(--polaris-ease);
  }
  .hero-playback button:hover { color: #fff; opacity: .72; }
  .hero-playback button:active { transform: scale(.97); }
}

/* Portrait screens, including iPad portrait, use the site's dedicated vertical edit. */
@media (max-width: 700px), (min-width: 701px) and (max-width: 1000px) and (orientation: portrait) {
  :root { --polaris-header-height: 66px; }
  header { height: var(--polaris-header-height); }
  #main-navigation { top: var(--polaris-header-height); }
  .hero {
    height: calc(100svh - var(--polaris-header-height));
    height: calc(100dvh - var(--polaris-header-height));
    min-height: calc(100svh - var(--polaris-header-height));
    padding: 0;
    background: #171917;
  }
  .hero-frame, .hero-photo, .hero-picture { width: 100%; height: 100%; max-width: none; }
  .hero-frame { flex: 1 1 auto; margin: 0; animation: none; }
  .hero-photo { border-radius: 0; box-shadow: none; background: #171917; }
  .hero-photo img {
    width: 100%; height: 100%; max-height: none;
    object-fit: cover; object-position: var(--hero-focus, center 50%);
  }
  .hero-foot {
    position: absolute; z-index: 3; right: 0; bottom: env(safe-area-inset-bottom, 0px); left: 0;
    width: auto; max-width: none; margin: 0; padding: 12px 6% 16px;
    color: #fff; text-shadow: 0 1px 9px #000b;
  }
  .hero-playback { gap: clamp(16px, 5vw, 24px); color: #fff; }
  .hero-playback button {
    min-width: 0 !important; min-height: 36px !important; padding: 6px 0 !important;
    border: 0 !important; border-radius: 0 !important; background: transparent !important;
    box-shadow: none !important; -webkit-backdrop-filter: none !important; backdrop-filter: none !important;
    color: #fff !important; text-shadow: 0 1px 9px #000b !important;
  }
  .hero-photo .view-label { display: none; }
}

/* Refined section rhythm while keeping the two full-width four-photo spreads. */
.archive-library { max-width: none; padding: 64px 0 20px; }
.archive-library > .section-title { padding-inline: 5.2%; margin-bottom: 18px; }
.archive-library > .section-title h2 {
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(28px, 3vw, 38px);
  letter-spacing: .055em;
}
.archive-library > .section-title > p { color: #73766e; font-size: 12px; letter-spacing: .045em; }
.archive-story { margin-bottom: clamp(70px, 8vw, 112px); }
.archive-story .archive-chapter {
  display: grid;
  grid-template-columns: auto minmax(32px, 1fr) auto;
  gap: clamp(15px, 2.2vw, 34px);
  align-items: end;
  margin: 0;
  padding: clamp(42px, 5vw, 72px) 5.2% clamp(20px, 2.2vw, 30px);
}
.archive-story .archive-chapter-title { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.archive-story .archive-chapter h3 {
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(44px, 5.2vw, 68px);
  font-weight: 400;
  letter-spacing: .035em;
  line-height: .98;
  color: #2c302b;
}
.archive-story .archive-chapter .chapter-en {
  font-size: 9px;
  line-height: 1.35;
  letter-spacing: .17em;
  color: #74766d;
}
.archive-story .archive-chapter i {
  height: 1px;
  margin-bottom: 9px;
  transform-origin: left center;
  background: linear-gradient(90deg, #a8a79d, #dddbd1);
}
.archive-story .archive-chapter > span:not(.chapter-en) {
  padding-bottom: 8px;
  color: #72746d;
  font: 400 11px/1.2 Georgia, "Times New Roman", serif;
  letter-spacing: .08em;
  white-space: nowrap;
}
.archive-story-spread {
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: repeat(2, clamp(190px, 31svh, 360px));
  gap: 3px;
  background: var(--paper);
}
.archive-story-spread .mosaic-panel { background: var(--paper); }
.archive-story-spread .archive-work.mosaic-lead { grid-column: 1 !important; grid-row: 1 / 3 !important; }
.archive-story-spread .archive-work.mosaic-tall { grid-column: 2 !important; grid-row: 1 / 3 !important; }
.archive-story-spread .archive-work.mosaic-detail-a { grid-column: 3 !important; grid-row: 1 !important; }
.archive-story-spread .archive-work.mosaic-detail-b { grid-column: 3 !important; grid-row: 2 !important; }
.archive-story-spread .mosaic-panel img {
  object-position: center;
  transition: transform 520ms var(--polaris-spring);
}
.archive-story-spread .mosaic-tall[data-orientation="portrait"] img { object-position: center 39%; }
.archive-story-spread .mosaic-panel.motion-pending {
  opacity: 0;
  transform: translate3d(0, 28px, 0) scale(.988);
  transition: opacity 480ms var(--polaris-ease), transform 580ms var(--polaris-spring);
}
.archive-story-spread .mosaic-panel.motion-pending.is-visible { opacity: 1; transform: none; }
.archive-story .archive-chapter.motion-pending {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  clip-path: none;
  transition: opacity 460ms var(--polaris-ease), transform 560ms var(--polaris-spring);
}
.archive-story .archive-chapter.motion-pending.is-visible { opacity: 1; transform: none; }
.archive-story .archive-chapter i { transform: scaleX(.04); transition: transform 560ms var(--polaris-spring); }
.archive-story .archive-chapter.is-visible i { transform: scaleX(1); }

@media (hover: hover) and (pointer: fine) {
  .archive-story-spread .mosaic-panel button:hover { transform: none; box-shadow: none; }
  .archive-story-spread .mosaic-panel button:hover img { transform: scale(1.035); }
  .archive-story-spread .mosaic-panel button:active img { transform: scale(.99); }
}

@media (max-width: 1000px) {
  header { padding-inline: 5% 4%; }
  #main-navigation { background: rgba(240, 239, 233, .98); }
  #main-navigation .nav-divider { display: none !important; }
  #main-navigation .nav-core, #main-navigation .nav-collections { gap: 8px 22px; }
  #main-navigation .nav-core a, #main-navigation .nav-collections a { min-height: 48px; }
  #main-navigation .nav-en { max-width: 24ch; font-size: 9px !important; line-height: 1.35; letter-spacing: .055em; }
  .archive-library > .section-title { padding-inline: 5%; }
  .archive-story .archive-chapter { padding-inline: 5%; }
  .archive-story-spread { width: 100vw; margin-left: calc(50% - 50vw); }
}

/* Portrait mosaics become a tall lead plus three readable, independent frames. */
@media (max-width: 700px), (min-width: 701px) and (max-width: 1000px) and (orientation: portrait) {
  .archive-library { padding-top: 50px; }
  .archive-library > .section-title { margin-bottom: 8px; }
  .archive-story { margin-bottom: 58px; }
  .archive-story .archive-chapter {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    padding: 38px 5% 17px;
  }
  .archive-story .archive-chapter-title { gap: 6px; }
  .archive-story .archive-chapter h3 { font-size: clamp(36px, 9vw, 48px); letter-spacing: .045em; }
  .archive-story .archive-chapter .chapter-en { max-width: 29ch; font-size: 8px; letter-spacing: .14em; }
  .archive-story .archive-chapter i { display: none; }
  .archive-story .archive-chapter > span:not(.chapter-en) { padding: 0; font-size: 9px; }
  .archive-story-spread {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) !important;
    grid-template-rows: repeat(3, clamp(132px, 18svh, 198px)) !important;
    gap: 3px;
  }
  .archive-story-spread .archive-work.mosaic-lead { grid-column: 1 !important; grid-row: 1 / 4 !important; }
  .archive-story-spread .archive-work.mosaic-tall { grid-column: 2 !important; grid-row: 1 !important; }
  .archive-story-spread .archive-work.mosaic-detail-a { grid-column: 2 !important; grid-row: 2 !important; }
  .archive-story-spread .archive-work.mosaic-detail-b { grid-column: 2 !important; grid-row: 3 !important; }
  .archive-story-spread .mosaic-panel img { object-position: center 42%; }
  .archive-story-spread .mosaic-lead[data-orientation="portrait"] img { object-position: center 38%; }
  .archive-story-spread .mosaic-tall[data-orientation="portrait"] img,
  .archive-story-spread .mosaic-detail-a[data-orientation="portrait"] img,
  .archive-story-spread .mosaic-detail-b[data-orientation="portrait"] img { object-position: center 37%; }
  .archive-story-spread.is-continuation { margin-top: 26px; }
}

@media (min-width: 701px) and (max-width: 1000px) and (orientation: portrait) {
  :root { --polaris-header-height: 68px; }
  .archive-story-spread { grid-template-rows: repeat(3, clamp(164px, 20svh, 225px)) !important; }
  .archive-story-spread .archive-work.mosaic-lead { grid-column: 1 !important; grid-row: 1 / 4 !important; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .archive-story-spread .mosaic-panel.motion-pending,
  .archive-story-spread .mosaic-panel.motion-pending.is-visible,
  .archive-story .archive-chapter.motion-pending,
  .archive-story .archive-chapter.motion-pending.is-visible,
  .archive-story .archive-chapter i {
    opacity: 1; transform: none; clip-path: none; transition: none;
  }
}

/* Touch-first devices use direct swipes; keep the viewer free of desktop arrows. */
@media (hover: none) and (pointer: coarse) {
  .viewer-edge-controls { display: none !important; }
}