body {
  background: #fdf6f3;
  font-family: "Noto Sans JP", sans-serif;
  color: #555;
  margin: 0;
  padding-top: 3.5rem;
}
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1rem 2rem;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.nav-link {
  color: #555;
  text-decoration: none;
  font-weight: 400;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link.active {
  color: #d4a574;
  font-weight: 500;
}

.nav-link:hover {
  color: #d4a574;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #d4a574, #c49660);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-separator {
  color: #ccc;
  margin: 0 0.5rem;
  font-weight: 300;
}
.breadcrumb {
  padding: 2rem 0 1rem 2.5rem;
  font-size: 1.1rem;
  color: #f38e8e;
  background: #fff7f3;
  border-bottom: 1px solid #ddd;
  letter-spacing: 0.03em;
}
.breadcrumb a {
  color: #f38e8e;
  text-decoration: none;
  font-weight: 500;
}
.breadcrumb-separator {
  margin: 0 0.5em;
  color: #f8b6b6;
}
.breadcrumb-current {
  color: #f8b6b6;
}
.main-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 3rem 1.5rem;
}
.hero-section {
  text-align: center;
  margin-top: 2.5rem;
}
.logo-title {
  font-family: "Playfair Display", serif;
  font-size: 2.7rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  letter-spacing: 0.02em;
}
.logo-yo {
  color: #1ed760;
}
.logo-haku {
  color: #888;
}
.logo-image-wrap {
  position: relative;
  display: inline-block;
  margin-bottom: 2.5rem;
}
.logo-image {
  width: 140px;
  height: 140px;
  border-radius: 30px;
  z-index: 2;
  position: relative;
  box-shadow: 0 8px 40px 0 #f8b6b6;
}
.logo-glow {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 260px;
  height: 180px;
  background: radial-gradient(circle, #f8b6b6 0%, #fff7f3 80%);
  filter: blur(32px);
  transform: translate(-50%, -50%);
  z-index: 1;
  opacity: 0.7;
}
.section-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #666;
  margin: 2.5rem 0 1.2rem 0;
  letter-spacing: 0.04em;
  position: relative;
}
.section-title span {
  border-bottom: 2px solid #ccc;
  padding-bottom: 0.1em;
}
.stack-title {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #555;
  margin-bottom: 1.2em;
  padding-bottom: 0.2em;
  border-bottom: none;
  gap: 5px;
}
.stack-text {
  border-bottom: 2px solid #d9d9d9;
  padding-bottom: 0.2em;
}
.star {
  color: #f38e8e;
  font-size: 1.2em;
  vertical-align: middle;
  border-bottom: none;
  padding-bottom: 0;
}

.summary-text {
  text-align: center;
  font-size: 1.08rem;
  color: #666;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}
.highlight {
  color: #f38e8e;
  font-weight: bold;
}
.stack-list {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.stack-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 1.1rem;
  color: #888;
}
.stack-list li {
  margin-bottom: 0.5em;
  letter-spacing: 0.02em;
}
.screens-section {
  margin-top: 2.5rem;
  position: relative;

}

.screens-deco-star {
  position: absolute;
  color: #888;
  font-size: 2.5rem;
  z-index: 2;
  pointer-events: none;
  transition: all 0.2s;
}
.screens-deco-star.star-tl {
  top: 0;
  left: 2vw;
  transform: translate(-50%, -50%);
}
.screens-deco-star.star-tr {
  top: 0;
  right: 2vw;
  transform: translate(50%, -50%);
}
.screens-deco-star.star-bl {
  bottom: 0;
  left: 2vw;
  transform: translate(-50%, 50%);
}
.screens-deco-star.star-br {
  bottom: 0;
  right: 2vw;
  transform: translate(50%, 50%);
}


.screens-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 2.2rem 1.2rem;
  margin: 2.5rem auto;
  padding: 2.5rem;
  position: relative;
  background: transparent;
  width: max-content;
  justify-content: center;
  min-width: 320px;
}

.screens-grid::before,
.screens-grid::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: #888;
  z-index: 1;
}
.screens-grid::before { top: 0; }
.screens-grid::after { bottom: 0; }
.screens-grid .vline {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #888;
  z-index: 1;
}
.screens-grid .vline.left { left: 0; }
.screens-grid .vline.right { right: 0; }



.screen-item img {
  width: 95%;
  max-width: 220px;
  border-radius: 12px;
  box-shadow: 0 2px 12px #f8b6b6;
}
.back-btn-wrap {
  display: flex;
  justify-content: center;
  margin: 2.5rem 0 1.5rem 0;
}
.back-btn {
  background: #fff;
  color: #f38e8e;
  border: 1px solid #f38e8e;
  border-radius: 8px;
  padding: 0.6em 1.6em;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.07);
  transition: background 0.2s, color 0.2s;
  margin-bottom: 5%;
}
.back-btn:hover {
  background: #f38e8e;
  color: #fff;
}
@media (max-width: 900px) {
  .main-content {
    padding: 0 0.5rem 2rem 0.5rem;
  }
    .summary-text {
    font-size: 0.7rem;
  }

  .screens-grid {
    margin-left: auto;
    margin-right: auto;
    justify-content: center;
  }

  .screen-item img {
    max-width: 40vw;
    max-height: 100vh;
  }
  .logo-image {
    width: 90px;
    height: 90px;
  }
  .logo-glow {
    width: 160px;
    height: 100px;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 0.8rem 1rem;
  }

  .nav-links {
    gap: 0.3rem;
  }

  .nav-link {
    font-size: 0.8rem;
    letter-spacing: 0.3px;
  }

  .nav-separator {
    margin: 0 0.3rem;
    font-size: 0.8rem;
  }
  

    .screens-deco-star.star-tl,
  .screens-deco-star.star-bl {
    left: 4vw;
  }
  .screens-deco-star.star-tr,
  .screens-deco-star.star-br {
    right: 4vw;
  }
  .screens-deco-star {
    font-size: 2rem;
  }
}