:root {
  --c-pink: #ff4b8b;
  --c-pink-light: #ffe6f0;
  --c-blue: #3b5bdb;
  --c-blue-light: #ebf0ff;
  --c-green: #20c997;
  --c-green-light: #e6f9f4;
  --c-yellow: #f5a623;
  --c-yellow-light: #fff5e6;
  --c-purple: #9b51e0;
  --c-purple-light: #f4e8ff;
  --bg-main: #f8faff;
}

body.bg-light-blue {
  background-color: var(--bg-main);
  color: #333;
  font-family: 'Noto Sans JP', sans-serif;
}

.text-pink { color: var(--c-pink) !important; }
.text-blue { color: var(--c-blue) !important; }
.text-green { color: var(--c-green) !important; }
.text-yellow { color: var(--c-yellow) !important; }
.text-purple { color: var(--c-purple) !important; }

.bg-pink { background-color: var(--c-pink) !important; }
.bg-blue { background-color: var(--c-blue) !important; }
.bg-green { background-color: var(--c-green) !important; }
.bg-yellow { background-color: var(--c-yellow) !important; }
.bg-purple { background-color: var(--c-purple) !important; }

.bg-pink-light { background-color: var(--c-pink-light) !important; }
.bg-blue-light { background-color: var(--c-blue-light) !important; }
.bg-green-light { background-color: var(--c-green-light) !important; }
.bg-yellow-light { background-color: var(--c-yellow-light) !important; }
.bg-purple-light { background-color: var(--c-purple-light) !important; }

.border-pink { border-color: var(--c-pink) !important; }
.border-pink-light { border-color: var(--c-pink-light) !important; }
.border-blue { border-color: var(--c-blue) !important; }

.btn-pink {
  background-color: var(--c-pink);
  color: #fff;
  border: none;
}
.btn-pink:hover {
  background-color: #e63976;
  color: #fff;
}

.btn-outline-pink {
  color: var(--c-pink);
  border-color: var(--c-pink);
  background-color: transparent;
}
.btn-outline-pink:hover {
  background-color: var(--c-pink);
  color: #fff;
}

.btn-blue {
  background-color: var(--c-blue);
  color: #fff;
  border: none;
}
.btn-blue:hover {
  background-color: #2e4ab8;
  color: #fff;
}

.section-title {
  font-weight: 700;
  color: #333;
}

.placeholder-hero {
  width: 320px;
  height: 320px;
  background-color: #f8f9fa;
}
.badge-balloon {
  top: -10px !important;
  right: 20px !important;
  border: 2px solid var(--c-pink);
}


.feature-card {
  transition: transform 0.2s ease;
}
.feature-card:hover {
  transform: translateY(-5px);
}
.icon-circle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow-container {
  position: relative;
}
.flow-step {
  flex: 1;
  min-width: 140px;
  max-width: 180px;
  z-index: 1;
}
.step-num {
  position: absolute;
  top: -15px;
  left: -15px;
  width: 35px;
  height: 35px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  border: 3px solid #fff;
}


.step-badge {
  width: 28px;
  height: 28px;
  font-size: 0.9rem;
}

.custom-accordion .accordion-button:not(.collapsed) {
  background-color: var(--c-blue-light);
  color: var(--c-blue);
  box-shadow: none;
}
.custom-accordion .accordion-button:focus {
  box-shadow: none;
}
.custom-accordion .accordion-button::after {
  filter: grayscale(1);
}
.custom-accordion .accordion-button:not(.collapsed)::after {
  filter: brightness(0) saturate(100%) invert(31%) sepia(87%) saturate(2250%) hue-rotate(218deg) brightness(94%) contrast(92%); /* 青色っぽく */
}

@media (max-width: 991px) {
  .flow-step {
    max-width: 100%;
    width: 100%;
  }
}
@media (max-width: 576px) {
  .youtube-banner {
    flex-direction: column;
    text-align: center;
  }
  .youtube-banner .btn {
    margin-top: 15px;
    width: 100%;
  }
}