/* SayHi language departure hall */
:root {
  --welcome-accent: #9ed8ff;
  --welcome-accent-strong: #eef9ff;
  --welcome-ink: #f7fbff;
  --welcome-muted: rgba(242, 248, 255, 0.7);
  --welcome-line: rgba(255, 255, 255, 0.24);
  --welcome-surface: rgba(4, 12, 28, 0.38);
}

html.sayhi-welcome-open,
html.sayhi-welcome-open body {
  overflow: hidden;
  overscroll-behavior: none;
}

.sayhi-welcome-complete .welcome-gate {
  display: none;
}

.welcome-gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  min-height: 100svh;
  overflow: hidden;
  color: var(--welcome-ink);
  background: #030914;
  isolation: isolate;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.welcome-gate::before,
.welcome-gate::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.welcome-gate::before {
  z-index: 2;
  background:
    linear-gradient(90deg, rgba(1, 6, 16, 0.93) 0%, rgba(2, 8, 19, 0.72) 31%, rgba(2, 9, 20, 0.18) 61%, rgba(1, 5, 13, 0.3) 100%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.38), transparent 24%, transparent 70%, rgba(0, 0, 0, 0.72));
  transition: background 0.9s ease;
}

.welcome-gate::after {
  z-index: 4;
  opacity: 0.17;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.3'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.welcome-backdrops,
.welcome-scene {
  position: absolute;
  inset: 0;
}

.welcome-backdrops {
  z-index: 0;
  background: #030914;
}

.welcome-scene {
  opacity: 0;
  transform: scale(1.07);
  background-position: center;
  background-size: cover;
  transition: opacity 1.05s cubic-bezier(0.22, 1, 0.36, 1), transform 7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.welcome-scene.is-active {
  opacity: 1;
  transform: scale(1);
}

.welcome-scene[data-scene="zh"] { background-image: url("../img/welcome/world-zh.jpg"); }
.welcome-scene[data-scene="en"] { background-image: url("../img/welcome/world-en.jpg"); }
.welcome-scene[data-scene="es"] { background-image: url("../img/welcome/world-es.jpg"); }
.welcome-scene[data-scene="fr"] { background-image: url("../img/welcome/world-fr.jpg"); }
.welcome-scene[data-scene="de"] { background-image: url("../img/welcome/world-de.jpg"); }
.welcome-scene[data-scene="ja"] { background-image: url("../img/welcome/world-ja.jpg"); }

.welcome-aurora {
  position: absolute;
  z-index: 3;
  width: 72vw;
  height: 72vw;
  right: -30vw;
  top: -38vw;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.34;
  filter: blur(70px);
  background: radial-gradient(circle, var(--welcome-accent), transparent 67%);
  transition: background 0.8s ease;
}

.welcome-chrome {
  position: relative;
  z-index: 6;
  height: 100svh;
  min-height: 620px;
  padding: clamp(24px, 3.2vw, 56px) clamp(24px, 4vw, 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  grid-template-rows: auto 1fr auto;
}

.welcome-brand {
  grid-column: 1;
  grid-row: 1;
  display: inline-flex;
  align-items: center;
  gap: 13px;
  width: max-content;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
  font-size: 18px;
  font-weight: 720;
}

.welcome-brand img {
  width: 31px;
  height: 31px;
  object-fit: contain;
}

.welcome-brand small {
  display: block;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 8px;
  line-height: 1;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.welcome-topnote {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.welcome-topnote::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--welcome-accent);
  box-shadow: 0 0 18px var(--welcome-accent);
}

.welcome-copy {
  grid-column: 1;
  grid-row: 2;
  align-self: center;
  max-width: 760px;
  padding: 5vh 0 3vh;
}

.welcome-kicker {
  margin: 0 0 clamp(20px, 3vh, 34px);
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--welcome-accent-strong);
  font-size: 10px;
  font-weight: 760;
  line-height: 1;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.welcome-kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--welcome-accent);
  box-shadow: 0 0 20px var(--welcome-accent);
}

.welcome-title {
  max-width: 11ch;
  margin: 0;
  color: #fff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(56px, 6.9vw, 118px);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: -0.065em;
  text-wrap: balance;
  text-shadow: 0 12px 55px rgba(0, 0, 0, 0.32);
  transition: opacity 0.32s ease, transform 0.58s cubic-bezier(0.22, 1, 0.36, 1);
}

.welcome-title em {
  display: block;
  color: var(--welcome-accent-strong);
  font-weight: inherit;
  font-style: italic;
}

.welcome-gate[data-welcome-lang="zh"] .welcome-title {
  max-width: 8.8em;
  font-family: "STSong", "Songti SC", "Noto Serif SC", serif;
  font-size: clamp(52px, 6.2vw, 102px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.welcome-gate[data-welcome-lang="zh"] .welcome-title em { font-style: normal; }
.welcome-gate[data-welcome-lang="es"] .welcome-title { letter-spacing: -0.075em; }
.welcome-gate[data-welcome-lang="fr"] .welcome-title { max-width: 10ch; }
.welcome-gate[data-welcome-lang="de"] .welcome-title {
  max-width: 12ch;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(52px, 6vw, 98px);
  font-weight: 760;
  line-height: 0.9;
  letter-spacing: -0.075em;
}
.welcome-gate[data-welcome-lang="de"] .welcome-title em { font-style: normal; }
.welcome-gate[data-welcome-lang="ja"] .welcome-title {
  max-width: 9em;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  font-size: clamp(50px, 5.8vw, 96px);
  line-height: 1.05;
  letter-spacing: -0.05em;
}
.welcome-gate[data-welcome-lang="ja"] .welcome-title em { font-style: normal; }

.welcome-summary {
  max-width: 500px;
  margin: clamp(22px, 3.3vh, 38px) 0 0;
  color: var(--welcome-muted);
  font-size: clamp(14px, 1.15vw, 18px);
  line-height: 1.65;
  transition: opacity 0.32s ease, transform 0.58s cubic-bezier(0.22, 1, 0.36, 1);
}

.welcome-actions {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: clamp(25px, 4vh, 46px);
}

.welcome-enter {
  position: relative;
  min-width: 190px;
  height: 58px;
  padding: 0 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 999px;
  color: #06101f;
  background: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 820;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.welcome-enter::before {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-102%);
  background: var(--welcome-accent);
  transition: transform 0.42s cubic-bezier(0.22, 1, 0.36, 1);
}

.welcome-enter span {
  position: relative;
  z-index: 1;
}

.welcome-enter:hover,
.welcome-enter:focus-visible {
  transform: translateY(-2px);
  border-color: var(--welcome-accent);
}

.welcome-enter:hover::before,
.welcome-enter:focus-visible::before { transform: translateX(0); }

.welcome-enter:focus-visible,
.welcome-language:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 4px;
}

.welcome-place {
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 9px;
  line-height: 1.1;
  letter-spacing: 0.19em;
  text-transform: uppercase;
}

.welcome-place strong {
  color: #fff;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.welcome-portal {
  grid-column: 2;
  grid-row: 2;
  align-self: center;
  justify-self: center;
  position: relative;
  width: min(37vw, 54vh);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  pointer-events: none;
  opacity: 0.94;
}

.welcome-orbit,
.welcome-orbit::before,
.welcome-orbit::after {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.welcome-orbit {
  inset: 4%;
  transform: rotate(18deg);
  border-color: color-mix(in srgb, var(--welcome-accent) 64%, transparent);
  box-shadow: inset 0 0 80px rgba(255, 255, 255, 0.03), 0 0 42px rgba(0, 0, 0, 0.25);
  animation: welcome-spin 24s linear infinite;
}

.welcome-orbit::before,
.welcome-orbit::after { content: ""; }
.welcome-orbit::before { inset: 8%; border-style: dashed; opacity: 0.56; }
.welcome-orbit::after { inset: 24%; border-color: rgba(255, 255, 255, 0.14); }

.welcome-orbit-b {
  inset: 15%;
  animation-direction: reverse;
  animation-duration: 19s;
}

.welcome-code {
  color: rgba(255, 255, 255, 0.95);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(68px, 9vw, 158px);
  font-weight: 850;
  line-height: 1;
  letter-spacing: -0.11em;
  mix-blend-mode: overlay;
  text-shadow: 0 0 40px rgba(255, 255, 255, 0.18);
  transform: translateX(-0.05em);
  transition: opacity 0.35s ease, transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

.welcome-code::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  margin: 0.13em 0 0 0.16em;
  border-radius: 50%;
  background: var(--welcome-accent);
  box-shadow: 0 0 24px var(--welcome-accent);
}

.welcome-index {
  position: absolute;
  right: 8%;
  bottom: 11%;
  display: flex;
  align-items: center;
  gap: 9px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 10px;
  letter-spacing: 0.18em;
}

.welcome-index span:nth-child(2) {
  width: 58px;
  height: 1px;
  background: linear-gradient(90deg, var(--welcome-accent), rgba(255, 255, 255, 0.17));
}

.welcome-languages {
  grid-column: 1 / -1;
  grid-row: 3;
  align-self: end;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.welcome-language {
  position: relative;
  min-width: 0;
  padding: 19px 15px 5px;
  border: 0;
  color: rgba(255, 255, 255, 0.54);
  background: transparent;
  cursor: pointer;
  text-align: left;
  font: inherit;
  transition: color 0.35s ease, transform 0.35s ease;
}

.welcome-language::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 100%;
  height: 2px;
  background: var(--welcome-accent);
  box-shadow: 0 0 18px var(--welcome-accent);
  transition: right 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.welcome-language:hover { color: #fff; transform: translateY(-2px); }
.welcome-language.is-active { color: #fff; }
.welcome-language.is-active::before { right: 0; }

.welcome-language b,
.welcome-language small { display: block; }
.welcome-language b {
  overflow: hidden;
  font-size: clamp(12px, 1.05vw, 16px);
  font-weight: 680;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.welcome-language small {
  margin-top: 7px;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.38);
  font-size: 8px;
  letter-spacing: 0.16em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.welcome-swipe-hint {
  display: none;
}

.welcome-gate.is-switching .welcome-title,
.welcome-gate.is-switching .welcome-summary,
.welcome-gate.is-switching .welcome-code {
  opacity: 0;
  transform: translateY(15px);
}

.welcome-transition {
  position: absolute;
  z-index: 20;
  inset: 0;
  pointer-events: none;
  visibility: hidden;
  background: var(--welcome-accent-strong);
}

.welcome-gate.is-entering .welcome-transition {
  visibility: visible;
  animation: welcome-curtain 1.25s cubic-bezier(0.76, 0, 0.24, 1) forwards;
}

.welcome-gate.is-entering .welcome-copy,
.welcome-gate.is-entering .welcome-portal,
.welcome-gate.is-entering .welcome-languages,
.welcome-gate.is-entering .welcome-brand,
.welcome-gate.is-entering .welcome-topnote {
  animation: welcome-exit 0.72s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes welcome-spin { to { transform: rotate(378deg); } }
@keyframes welcome-exit { to { opacity: 0; transform: translateY(-18px); } }
@keyframes welcome-curtain {
  0% { transform: translateY(101%); }
  48% { transform: translateY(0); }
  62% { transform: translateY(0); }
  100% { transform: translateY(-101%); }
}

@media (max-width: 900px) {
  .welcome-gate::before {
    background:
      linear-gradient(180deg, rgba(1, 6, 16, 0.48), rgba(1, 6, 16, 0.17) 33%, rgba(1, 6, 16, 0.86) 74%, rgba(1, 5, 13, 0.98)),
      linear-gradient(90deg, rgba(1, 6, 16, 0.48), transparent 75%);
  }

  .welcome-scene { background-position: 63% center; }
  .welcome-chrome {
    min-height: 590px;
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    padding: 22px 20px max(16px, env(safe-area-inset-bottom));
  }
  .welcome-brand { grid-column: 1; grid-row: 1; }
  .welcome-topnote { grid-column: 1; grid-row: 1; font-size: 8px; }
  .welcome-topnote span { display: none; }
  .welcome-copy {
    grid-column: 1;
    grid-row: 2;
    align-self: end;
    padding: 0 0 18px;
  }
  .welcome-portal {
    position: absolute;
    z-index: -1;
    right: -10vw;
    top: 16vh;
    width: min(76vw, 49vh);
    opacity: 0.72;
  }
  .welcome-kicker { margin-bottom: 18px; font-size: 8px; }
  .welcome-title,
  .welcome-gate[data-welcome-lang="zh"] .welcome-title,
  .welcome-gate[data-welcome-lang="de"] .welcome-title,
  .welcome-gate[data-welcome-lang="ja"] .welcome-title {
    max-width: 10ch;
    font-size: clamp(43px, 13.3vw, 72px);
  }
  .welcome-summary {
    max-width: 92%;
    margin-top: 17px;
    font-size: 13px;
    line-height: 1.55;
  }
  .welcome-actions { margin-top: 22px; }
  .welcome-enter { height: 52px; min-width: 168px; }
  .welcome-languages {
    grid-column: 1;
    grid-row: 3;
    gap: 8px;
    margin: 0 -20px;
    padding: 0 20px 4px;
    overflow-x: auto;
    grid-template-columns: repeat(6, minmax(112px, 1fr));
    scrollbar-width: none;
    scroll-snap-type: x proximity;
  }
  .welcome-languages::-webkit-scrollbar { display: none; }
  .welcome-language { padding: 14px 8px 5px; scroll-snap-align: start; }
  .welcome-language small { font-size: 7px; }
  .welcome-swipe-hint {
    position: absolute;
    z-index: 8;
    right: 20px;
    bottom: 88px;
    display: block;
    color: rgba(255, 255, 255, 0.42);
    font-size: 8px;
    letter-spacing: 0.13em;
    text-transform: uppercase;
  }
}

@media (max-height: 700px) and (min-width: 901px) {
  .welcome-chrome { min-height: 560px; padding-top: 24px; padding-bottom: 22px; }
  .welcome-copy { padding: 1vh 0; }
  .welcome-kicker { margin-bottom: 17px; }
  .welcome-title { font-size: clamp(52px, 6vw, 88px); }
  .welcome-summary { margin-top: 18px; }
  .welcome-actions { margin-top: 20px; }
  .welcome-enter { height: 50px; }
  .welcome-language { padding-top: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  .welcome-scene,
  .welcome-title,
  .welcome-summary,
  .welcome-code,
  .welcome-language,
  .welcome-enter,
  .welcome-enter::before { transition-duration: 0.01ms !important; }
  .welcome-orbit { animation: none; }
  .welcome-gate.is-entering .welcome-transition { animation-duration: 0.25s; }
  .welcome-gate.is-entering .welcome-copy,
  .welcome-gate.is-entering .welcome-portal,
  .welcome-gate.is-entering .welcome-languages,
  .welcome-gate.is-entering .welcome-brand,
  .welcome-gate.is-entering .welcome-topnote { animation-duration: 0.12s; }
}