:root {
  --logo-main: #4A3A2B;
  --logo-dark: #3B1F14;
  --logo-gold: #F2A900;
  --logo-brown: #7A5A2A;
  --logo-light: #F2EDE6;
  --logo-beige: #E0C68F;
  --bg-main: #F8F2EA;
  --bg-alt: #EFE4D2;
  --border: rgba(74, 58, 43, 0.12);
  --high-light: #FFF8F1;
  --text-secondary: rgba(255, 248, 241, 0.78);
  --paper-card: rgba(255, 249, 241, 0.82);
  --paper-card-mobile: rgba(255, 249, 241, 0.92);
  --corner-radius: 30px;
  --shadow-soft: 0 14px 40px rgba(20, 12, 8, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}

body {
  overflow: hidden;
  font-family: "Playfair Display", Georgia, "Times New Roman", serif;
  color: var(--logo-main);
  background:
    radial-gradient(circle at center, rgba(242, 169, 0, 0.08) 0%, transparent 58%),
    linear-gradient(180deg, var(--bg-main) 0%, var(--bg-alt) 100%);
}

body.is-loading {
  overflow: hidden;
}

body.is-loading #app {
  visibility: hidden;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 48 48'%3E%3Cg fill='%234A3A2B' fill-opacity='0.028'%3E%3Ccircle cx='6' cy='8' r='1.1'/%3E%3Ccircle cx='22' cy='18' r='0.95'/%3E%3Ccircle cx='38' cy='10' r='1'/%3E%3Ccircle cx='14' cy='34' r='1'/%3E%3Ccircle cx='34' cy='31' r='1.1'/%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.75;
  z-index: 20;
}

img {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
}

p,
h1,
h2,
h3 {
  margin: 0;
}

.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at center, rgba(242, 169, 0, 0.08) 0%, transparent 40%),
    linear-gradient(180deg, rgba(248, 242, 234, 0.98), rgba(239, 228, 210, 0.98));
  transition: opacity 500ms ease, visibility 500ms ease;
}

.loading-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-inner {
  width: min(360px, calc(100% - 40px));
  text-align: center;
}

.loading-brand {
  font-size: 1rem;
  letter-spacing: 0.4em;
  padding-left: 0.4em;
  color: var(--logo-main);
  margin-bottom: 18px;
}

.loading-bar {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(74, 58, 43, 0.12);
}

.loading-bar-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--logo-gold), var(--logo-main));
  transition: width 180ms ease;
}

.loading-progress {
  margin-top: 12px;
  color: rgba(74, 58, 43, 0.68);
  font-size: 0.86rem;
  letter-spacing: 0.2em;
  padding-left: 0.2em;
}

#app {
  height: 100vh;
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  overscroll-behavior-x: contain;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x;
  position: relative;
  z-index: 1;
}

.slide {
  flex: 0 0 100vw;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  height: 100vh;
  width: 100vw;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  padding: 6vh 8vw;
  color: var(--high-light);
  overflow: hidden;
}

.slide-background,
.slide-shade {
  position: absolute;
  inset: 0;
}

.slide-background {
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}

.slide-shade {
  background:
    linear-gradient(to top, rgba(20, 12, 8, 0.74) 0%, rgba(20, 12, 8, 0) 56%, rgba(20, 12, 8, 0.2) 100%);
}

.first-slide {
  justify-content: space-between;
  align-items: center;
  padding: 2vh 4vw;
}

.first-slide .slide-shade {
  background:
    linear-gradient(to top, rgba(20, 12, 8, 0.62) 0%, rgba(20, 12, 8, 0.08) 42%, rgba(20, 12, 8, 0.34) 100%);
}

.brand-header,
.witty-text,
.brand-block,
.scroll-hint-wrapper,
.subtitle-overlay {
  position: relative;
  z-index: 2;
}

.brand-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2vh;
}

.logo-container {
  display: flex;
  align-items: center;
}

.site-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  padding: 8px;
  border-radius: 16px;
  background: rgba(255, 249, 241, 0.2);
  border: 1px solid rgba(255, 249, 241, 0.18);
  backdrop-filter: blur(10px);
}

.site-wordmark {
  font-size: 1.15rem;
  letter-spacing: 0.22em;
  padding-left: 0.22em;
  font-weight: 600;
}

.witty-text {
  width: 100%;
  text-align: center;
  font-size: 0.95rem;
  font-style: italic;
  color: rgba(255, 255, 255, 0.84);
  margin-top: auto;
  margin-bottom: auto;
  opacity: 0;
  transform: translateY(18px);
  animation: fade-up 0.9s ease forwards 0.35s;
}

.witty-text p {
  letter-spacing: 0.02em;
}

.brand-block {
  width: 100%;
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-start;
  align-items: flex-end;
  margin-bottom: 2vh;
}

.vertical-title {
  writing-mode: vertical-rl;
  font-size: clamp(3rem, 6.5vw, 5.2rem);
  letter-spacing: 0.22em;
  font-weight: 400;
  margin: 0 0 0 20px;
  line-height: 0.95;
}

.chinese-title-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.chinese-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.tagline {
  font-size: 1rem;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.76);
  letter-spacing: 0.08em;
}

.scroll-hint-wrapper {
  position: absolute;
  bottom: 2vh;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-hint {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.74);
  font-size: 1rem;
  cursor: pointer;
  padding: 10px;
  animation: hint-float 2.4s ease-in-out infinite;
}

.scroll-hint::after {
  content: "\2192";
  display: block;
  margin-top: 5px;
  font-size: 1.2rem;
}

.gallery-slide {
  justify-content: flex-end;
  align-items: stretch;
  padding: 0;
}

.gallery-slide.is-active .slide-background {
  transform: scale(1.05);
}

.subtitle-overlay {
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: min(720px, calc(100vw - 96px));
  margin: auto 0 5vh 5vw;
  padding: 22px 0 0;
  color: #fff9f2;
  text-shadow: 0 3px 18px rgba(8, 5, 4, 0.62);
}

.subtitle-verse {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.subtitle-ref {
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: rgba(255, 248, 241, 0.74);
}

.subtitle-line {
  margin: 0;
  opacity: 0;
  transform: translateX(22px);
}

.subtitle-zh {
  font-size: clamp(1.2rem, 2vw, 1.7rem);
  line-height: 1.75;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.subtitle-en {
  font-size: clamp(0.92rem, 1.1vw, 1.08rem);
  line-height: 1.8;
  color: rgba(255, 248, 241, 0.9);
  max-width: min(720px, calc(100vw - 96px));
}

.lightbox {
  width: min(1180px, calc(100% - 20px));
  padding: 16px;
  border: none;
  border-radius: 28px;
  background: rgba(24, 15, 11, 0.92);
}

.lightbox::backdrop {
  background: rgba(18, 11, 8, 0.74);
  backdrop-filter: blur(10px);
}

.lightbox img {
  width: 100%;
  max-height: 82vh;
  object-fit: contain;
  border-radius: 18px;
}

.lightbox-close {
  position: absolute;
  top: 14px;
  right: 16px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 248, 239, 0.12);
  color: var(--high-light);
  font-size: 1.6rem;
  cursor: pointer;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hint-float {
  0%, 100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(6px);
  }
}

@keyframes mobile-pan-left {
  0% {
    background-position: 44% center;
  }

  50% {
    background-position: 56% center;
  }

  100% {
    background-position: 44% center;
  }
}

@keyframes mobile-pan-right {
  0% {
    background-position: 56% center;
  }

  50% {
    background-position: 44% center;
  }

  100% {
    background-position: 56% center;
  }
}

@keyframes subtitle-slide-in {
  from {
    opacity: 0;
    transform: translateX(22px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes mobile-subtitle-zh-cycle {
  0%, 45% {
    opacity: 1;
    transform: translateX(0);
  }

  50%, 100% {
    opacity: 0;
    transform: translateX(-10px);
  }
}

@keyframes mobile-subtitle-en-cycle {
  0%, 45% {
    opacity: 0;
    transform: translateX(10px);
  }

  50%, 100% {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (max-width: 900px) {
  .site-logo {
    width: 48px;
    height: 48px;
  }

  .site-wordmark {
    font-size: 0.95rem;
  }

  .vertical-title {
    font-size: 3.6rem;
    margin-left: 12px;
  }

  .chinese-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 768px) {
  body {
    overflow: hidden;
  }

  .slide {
    flex: 0 0 100vw;
    width: 100vw;
    height: 100vh;
    min-height: 100vh;
    padding: 18vh 18px 26px;
  }

  .first-slide {
    justify-content: flex-start;
    align-items: stretch;
    padding: max(16px, env(safe-area-inset-top)) 18px 26px;
  }

  .brand-header {
    position: absolute;
    top: max(16px, env(safe-area-inset-top));
    left: 18px;
    right: 18px;
    margin-top: 0;
  }

  .witty-text {
    margin-top: 24vh;
    margin-bottom: auto;
    font-size: 0.88rem;
  }

  .brand-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-top: auto;
    margin-bottom: 8vh;
  }

  .vertical-title {
    writing-mode: horizontal-tb;
    font-size: 1.8rem;
    margin: 0;
    letter-spacing: 0.22em;
    padding-left: 0.22em;
  }

  .chinese-title {
    font-size: 1.5rem;
  }

  .tagline {
    font-size: 0.9rem;
  }

  .gallery-slide {
    justify-content: flex-end;
    align-items: stretch;
    padding: 0;
  }

  .gallery-slide .slide-background {
    inset: 0;
    transform: none;
    background-size: auto 100%;
    background-repeat: no-repeat;
    background-position: center center;
    background-color: rgba(12, 8, 6, 0.96);
    animation: mobile-pan-left 18s ease-in-out infinite;
    will-change: background-position;
  }

  .gallery-slide:nth-of-type(even) .slide-background {
    animation-name: mobile-pan-right;
  }

  .gallery-slide .slide-shade {
    background:
      linear-gradient(to top, rgba(20, 12, 8, 0.48) 0%, rgba(20, 12, 8, 0.08) 44%, rgba(20, 12, 8, 0.1) 100%);
    inset: 0;
  }

  .subtitle-overlay {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: max(88px, calc(env(safe-area-inset-bottom) + 64px));
    width: auto;
    margin: 0;
    padding: 0;
    gap: 10px;
  }

  .subtitle-verse {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(62px, auto);
    gap: 4px;
  }

  .subtitle-ref {
    font-size: 0.68rem;
    letter-spacing: 0.26em;
    color: rgba(255, 248, 241, 0.72);
  }

  .subtitle-zh {
    grid-column: 1;
    grid-row: 2;
    font-size: 0.82rem;
    line-height: 1.54;
  }

  .subtitle-en {
    grid-column: 1;
    grid-row: 2;
    font-size: 0.78rem;
    line-height: 1.56;
    color: rgba(255, 248, 241, 0.88);
    max-width: none;
  }

  .gallery-slide:not(.is-active) .subtitle-line {
    opacity: 0;
    transform: translateX(22px);
    animation: none;
  }

  .gallery-slide.is-active .subtitle-zh {
    animation: mobile-subtitle-zh-cycle 18s ease-in-out forwards;
  }

  .gallery-slide.is-active .subtitle-en {
    animation: mobile-subtitle-en-cycle 18s ease-in-out forwards;
  }
}

.gallery-slide:not(.is-active) .subtitle-line {
  opacity: 0;
  transform: translateX(22px);
  animation: none;
}

@media (min-width: 769px) {
  .gallery-slide.is-active .subtitle-zh {
    animation: subtitle-slide-in 520ms ease forwards 120ms;
  }

  .gallery-slide.is-active .subtitle-en {
    animation: subtitle-slide-in 520ms ease forwards 420ms;
  }
}