:root {
  --third-paper-bg: #efe8db;
  --third-paper-surface: #f5eee1;
  --third-paper-text: #2e241d;
  --third-paper-muted: #5e5248;
  --third-paper-accent: #b29052;
  --third-paper-line: rgba(46, 36, 29, 0.16);
  --third-paper-shadow: 0 22px 56px rgba(40, 28, 18, 0.12);
  --third-paper-serif: "Noto Serif JP", "Yu Mincho", serif;
  --third-paper-sans: "Cormorant Garamond", "Hiragino Mincho ProN", serif;
  --third-paper-ui: "Noto Serif JP", "Yu Mincho", serif;
}

.third-paper-showcase,
.third-paper-showcase *,
.third-paper-showcase *::before,
.third-paper-showcase *::after {
  box-sizing: border-box;
}

.third-paper-showcase {
  position: relative;
  padding: clamp(56px, 7vw, 96px) 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(255,255,255,0.38), transparent 28%),
    radial-gradient(circle at 88% 84%, rgba(177, 141, 85, 0.12), transparent 18%),
    linear-gradient(180deg, #f6f0e5 0%, var(--third-paper-bg) 100%);
  color: var(--third-paper-text);
  overflow: hidden;
  isolation: isolate;
}

.third-paper-showcase::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 24% 36%, rgba(0, 0, 0, 0.035) 0 1px, transparent 2px),
    radial-gradient(circle at 78% 18%, rgba(0, 0, 0, 0.025) 0 1.4px, transparent 2.2px),
    radial-gradient(circle at 14% 74%, rgba(0, 0, 0, 0.03) 0 1px, transparent 2px);
  background-size: 320px 240px, 420px 320px, 380px 280px;
  mix-blend-mode: multiply;
  pointer-events: none;
  opacity: 0.6;
}

.third-paper-showcase__inner {
  width: min(1360px, calc(100vw - clamp(28px, 5vw, 72px)));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.third-paper-showcase__frame {
  display: grid;
  grid-template-columns: minmax(260px, 0.32fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  position: relative;
}

.third-paper-showcase__intro {
  padding-top: clamp(18px, 2vw, 32px);
}

.third-paper-showcase__eyebrow {
  margin: 0;
  font-family: var(--third-paper-sans);
  font-size: .95rem;
  line-height: 1.2;
  letter-spacing: .18em;
  color: var(--third-paper-text);
}

.third-paper-showcase__eyebrow::after {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: currentColor;
  margin-top: 14px;
}

.third-paper-showcase__title {
  margin: 38px 0 0;
  display: grid;
  gap: 18px;
  font-family: var(--third-paper-serif);
  font-size: clamp(2.4rem, 2.6vw, 4.8rem);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: .1em;
}

.third-paper-showcase__title-line {
  display: block;
}

.third-paper-showcase__arrow {
  display: grid;
  gap: 18px;
  justify-items: start;
  margin-top: 34px;
}

.third-paper-showcase__arrow--next {
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  justify-items: center;
}

.third-paper-showcase__arrow-label {
  font-family: var(--third-paper-sans);
  font-size: .95rem;
  letter-spacing: .28em;
  color: var(--third-paper-text);
}

.third-paper-showcase__arrow-button {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(197, 171, 118, 0.72);
  color: #fff;
  font-size: 2.4rem;
  line-height: 1;
  box-shadow: 0 10px 24px rgba(136, 106, 51, 0.16);
}

.third-paper-showcase__lead {
  margin-top: 24px;
  font-family: var(--third-paper-serif);
  font-size: 1.05rem;
  line-height: 2.1;
  letter-spacing: .08em;
  color: var(--third-paper-muted);
}

.third-paper-showcase__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 82px;
  font-family: var(--third-paper-sans);
}

.third-paper-showcase__count {
  font-size: clamp(2.8rem, 4vw, 4.3rem);
  line-height: 1;
  color: var(--third-paper-text);
}

.third-paper-showcase__slash,
.third-paper-showcase__total {
  font-size: 1.35rem;
  color: rgba(46, 36, 29, 0.72);
}

.third-paper-showcase__progress {
  display: flex;
  gap: 8px;
  margin-top: 18px;
}

.third-paper-showcase__progress span {
  width: 42px;
  height: 4px;
  background: rgba(46, 36, 29, 0.18);
  border-radius: 999px;
}

.third-paper-showcase__progress span.is-active {
  background: var(--third-paper-text);
}

.third-paper-showcase__stage {
  position: relative;
}

.third-paper-showcase__main {
  position: relative;
  min-height: 700px;
  padding: 26px 86px 0 30px;
}

.third-paper-showcase__brush {
  position: absolute;
  inset: 0 150px 120px 110px;
  background:
    linear-gradient(180deg, rgba(210, 191, 156, 0.65), rgba(203, 187, 163, 0.45));
  clip-path: polygon(8% 6%, 79% 2%, 89% 17%, 88% 74%, 78% 94%, 18% 97%, 6% 86%, 3% 26%);
  filter: blur(0.2px);
  opacity: 0.9;
}

.third-paper-showcase__brush::before,
.third-paper-showcase__brush::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.third-paper-showcase__brush::before {
  inset: 10% 10% auto auto;
  width: 180px;
  height: 180px;
  background: rgba(112, 104, 99, 0.18);
  filter: blur(22px);
}

.third-paper-showcase__brush::after {
  right: -44px;
  bottom: 18px;
  width: 220px;
  height: 280px;
  background:
    radial-gradient(circle at 38% 42%, rgba(87, 78, 71, 0.16) 0 1px, transparent 2px),
    radial-gradient(circle at 64% 72%, rgba(87, 78, 71, 0.12) 0 1px, transparent 2px);
  background-size: 16px 16px, 14px 14px;
  opacity: 0.65;
}

.third-paper-showcase__image-frame {
  position: relative;
  margin: 0;
  width: min(100%, 860px);
  margin-left: auto;
  clip-path: polygon(11% 2%, 92% 2%, 98% 16%, 98% 88%, 89% 98%, 13% 98%, 4% 86%, 3% 16%);
  box-shadow: var(--third-paper-shadow);
  background: #c9baa7;
}

.third-paper-showcase__image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(20, 15, 10, 0.02), rgba(20, 15, 10, 0.12)),
    radial-gradient(circle at 8% 84%, rgba(255,255,255,0.12), transparent 22%);
  pointer-events: none;
  z-index: 1;
}

.third-paper-showcase__image-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 1.08 / 0.92;
  object-fit: cover;
}

.third-paper-showcase__vertical-copy {
  position: absolute;
  top: 146px;
  right: 140px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--third-paper-serif);
  font-size: clamp(2rem, 3vw, 3.4rem);
  line-height: 1.55;
  letter-spacing: .16em;
  color: var(--third-paper-text);
  background: rgba(244, 239, 228, 0.88);
  padding: 20px 16px;
}

.third-paper-showcase__seal {
  position: absolute;
  top: 24px;
  right: 92px;
  font-family: var(--third-paper-serif);
  font-size: 1.15rem;
  line-height: 1.15;
  letter-spacing: .18em;
  color: #9f3024;
  border: 2px solid rgba(159, 48, 36, 0.78);
  padding: 10px 8px;
  background: rgba(255, 246, 238, 0.55);
  transform: rotate(-2deg);
}

.third-paper-showcase__thumb-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  margin-top: 12px;
  align-items: start;
}

.third-paper-showcase__thumb {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  margin: 0;
  text-align: left;
  cursor: pointer;
  color: var(--third-paper-text);
}

.third-paper-showcase__thumb-paper {
  position: absolute;
  inset: -12px -14px -10px -14px;
  background: rgba(214, 191, 141, 0.72);
  filter: blur(.3px);
  transform: rotate(-1.8deg);
  z-index: -1;
  display: none;
}

.third-paper-showcase__thumb.is-active .third-paper-showcase__thumb-paper {
  display: block;
}

.third-paper-showcase__thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 1.1 / 0.72;
  object-fit: cover;
  box-shadow: 0 8px 18px rgba(35, 28, 20, 0.08);
}

.third-paper-showcase__thumb-label {
  display: block;
  margin-top: 12px;
  font-family: var(--third-paper-serif);
  font-size: 1.05rem;
  line-height: 1.5;
  letter-spacing: .06em;
}

.third-paper-showcase__thumb {
  position: relative;
}

.third-paper-showcase__thumb.is-active {
  transform: translateY(-2px);
}

@media (max-width: 1180px) {
  .third-paper-showcase__frame {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .third-paper-showcase__intro {
    max-width: 680px;
  }

  .third-paper-showcase__meta {
    margin-top: 42px;
  }

  .third-paper-showcase__main {
    min-height: auto;
    padding-right: 64px;
    padding-left: 0;
  }

  .third-paper-showcase__brush {
    inset: 8px 110px 90px 36px;
  }

  .third-paper-showcase__image-frame {
    width: 100%;
  }

  .third-paper-showcase__vertical-copy {
    right: 88px;
  }

  .third-paper-showcase__seal {
    right: 34px;
  }

  .third-paper-showcase__arrow--next {
    right: 0;
  }

  .third-paper-showcase__thumb-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .third-paper-showcase {
    padding: 42px 0 56px;
  }

  .third-paper-showcase__inner {
    width: min(100vw - 24px, 1100px);
  }

  .third-paper-showcase__title {
    margin-top: 24px;
    gap: 10px;
    font-size: clamp(2rem, 10vw, 3rem);
    line-height: 1.45;
  }

  .third-paper-showcase__lead {
    margin-top: 18px;
    font-size: .95rem;
    line-height: 1.9;
  }

  .third-paper-showcase__arrow {
    display: none;
  }

  .third-paper-showcase__meta {
    margin-top: 26px;
  }

  .third-paper-showcase__count {
    font-size: 2.3rem;
  }

  .third-paper-showcase__progress span {
    width: 28px;
  }

  .third-paper-showcase__main {
    padding: 0;
  }

  .third-paper-showcase__brush {
    inset: 10px 12px 44px 8px;
  }

  .third-paper-showcase__image-frame {
    clip-path: polygon(10% 3%, 94% 2%, 99% 14%, 97% 90%, 86% 99%, 10% 98%, 1% 85%, 2% 16%);
  }

  .third-paper-showcase__image-frame img {
    aspect-ratio: 1 / 1.08;
  }

  .third-paper-showcase__vertical-copy {
    position: absolute;
    top: 20px;
    right: 18px;
    font-size: 1.6rem;
    padding: 12px 8px;
    background: rgba(244, 239, 228, 0.82);
  }

  .third-paper-showcase__seal {
    top: 16px;
    right: auto;
    left: 16px;
    font-size: .92rem;
    padding: 8px 6px;
  }

  .third-paper-showcase__thumb-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
  }

  .third-paper-showcase__thumb-label {
    margin-top: 8px;
    font-size: .92rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .third-paper-showcase * {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}