.bd-placeholder-img {
  font-size: 1.125rem;
  text-anchor: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

@media (min-width: 768px) {
  .bd-placeholder-img-lg {
    font-size: 3.5rem;
  }
}

.b-example-divider {
  width: 100%;
  height: 3rem;
  background-color: rgba(0, 0, 0, 0.1);
  border: solid rgba(0, 0, 0, 0.15);
  border-width: 1px 0;
  box-shadow: inset 0 0.5em 1.5em rgba(0, 0, 0, 0.1),
    inset 0 0.125em 0.5em rgba(0, 0, 0, 0.15);
}

.b-example-vr {
  flex-shrink: 0;
  width: 1.5rem;
  height: 100vh;
}

.bi {
  vertical-align: -0.125em;
  fill: currentColor;
}

.nav-scroller {
  position: relative;
  z-index: 2;
  height: 2.75rem;
  overflow-y: hidden;
}

.nav-scroller .nav {
  display: flex;
  flex-wrap: nowrap;
  padding-bottom: 1rem;
  margin-top: -1px;
  overflow-x: auto;
  text-align: center;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.btn-bd-primary {
  --bd-violet-bg: #712cf9;
  --bd-violet-rgb: 112.520718, 44.062154, 249.437846;

  --bs-btn-font-weight: 600;
  --bs-btn-color: var(--bs-white);
  --bs-btn-bg: var(--bd-violet-bg);
  --bs-btn-border-color: var(--bd-violet-bg);
  --bs-btn-hover-color: var(--bs-white);
  --bs-btn-hover-bg: #6528e0;
  --bs-btn-hover-border-color: #6528e0;
  --bs-btn-focus-shadow-rgb: var(--bd-violet-rgb);
  --bs-btn-active-color: var(--bs-btn-hover-color);
  --bs-btn-active-bg: #5a23c8;
  --bs-btn-active-border-color: #5a23c8;
}

.bd-mode-toggle {
  z-index: 1500;
}

.bd-mode-toggle .dropdown-menu .active .bi {
  display: block !important;
}

.hero-section {
  background: linear-gradient(
      rgba(255, 255, 255, 0.92),
      rgba(255, 255, 255, 0.92)
    ),
    url("https://images.unsplash.com/photo-1501785888041-af3ef285b470?ixlib=rb-4.0.3")
      center/cover;
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.gradient-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg,
    rgba(66, 133, 244, 0.05),
    rgba(219, 68, 55, 0.05)
  );
  z-index: 1;
}

.badge {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.display-4 {
  font-size: 3.5rem;
  letter-spacing: -0.5px;
  line-height: 1.2;
  background: linear-gradient(45deg, #2c3e50, #3498db);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.lead {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #5a6a7a !important;
}

.btn-lg {
  border-radius: 12px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-main,
.btn-main-outline {
  padding: 15px 40px;
  font-weight: 600;
  border-radius: 10px;
  font-size: 1.1rem;
  transition: all 0.2s ease;
  width: 230px;
  text-align: center;
  white-space: nowrap;
}

.btn-main {
  background: linear-gradient(45deg, #4a90e2, #357abd);
  border: none;
  color: white;
  opacity: 0.9;
}

.btn-main:hover {
  background: linear-gradient(45deg, #357abd, #2a6198);
  box-shadow: 0 4px 15px rgba(74, 144, 226, 0.2);
  opacity: 0.85;
  color: rgba(255, 255, 255, 0.9);
}

.btn-main-outline {
  background: transparent;
  border: 2px solid #4a90e2;
  color: #4a90e2;
}

.btn-main-outline:hover {
  background: rgba(74, 144, 226, 0.1);
  border-color: #357abd;
  color: #357abd;
  box-shadow: 0 4px 15px rgba(74, 144, 226, 0.1);
}

.btn-outline-primary,
.btn-primary {
  width: 100px;
  text-align: center;
  padding: 6px 0;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.2s ease;
  box-sizing: border-box;
}

.btn-outline-primary {
  border: 1.5px solid #4a90e2;
  color: #4a90e2;
  background: transparent;
}

.btn-outline-primary:hover {
  background: rgba(74, 144, 226, 0.05);
  border-color: #357abd;
  color: #357abd;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.1);
}

.btn-primary {
  background: linear-gradient(45deg, #4a90e2, #357abd);
  border: 1.5px solid transparent;
  color: white;
  opacity: 0.9;
}

.btn-primary:hover {
  background: linear-gradient(45deg, #357abd, #2a6198);
  color: white;
  opacity: 1;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.15);
}

.feature-card {
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.icon-wrapper {
  width: 60px;
  height: 60px;
  background-color: #f8f9fa;
  border-radius: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.bi {
  font-size: 1.8rem;
  color: #4a90e2;
}

.custom-footer {
  background-color: #f8f9fa;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer-link {
  color: #6c757d;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #4a90e2;
}

.custom-footer h6 {
  color: #2c3e50;
}

.scroll-to-top-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(45deg, #4a90e2, #357abd);
  border: none;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  opacity: 0.9;
  padding: 0;
}

.scroll-to-top-circle:hover {
  background: linear-gradient(45deg, #357abd, #2a6198);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(74, 144, 226, 0.2);
  opacity: 0.85;
}

.scroll-to-top-circle i {
  font-size: 1.2rem;
  color: white;
}

.feature-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.feature-card p {
  word-break: keep-all;
  white-space: pre-line;
}

.feature-card h5 {
  font-size: 1.25rem;
  margin: 1rem 0;
  word-break: keep-all;
  width: 100%;
  color: #19232d;
}

.col-md-3.text-end {
  min-width: fit-content;
}

.btn-outline-secondary {
  border: 1.5px solid #4a90e2 !important;
  color: #4a90e2 !important;
  padding: 0.5rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
  background-color: transparent !important;
  transition: all 0.2s ease;
}

.btn-outline-secondary:hover {
  background: rgba(74, 144, 226, 0.05) !important;
  border-color: #357abd !important;
  color: #357abd !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 144, 226, 0.1);
}

/* 반응형 대응 */
@media (max-width: 768px) {
  .btn-main,
  .btn-main-outline {
    padding: 12px 30px;
    width: 200px;
    font-size: 1rem;
    white-space: nowrap;
  }

  .display-4 {
    font-size: 2rem;
    word-break: keep-all;
  }

  .lead {
    font-size: 1rem;
    word-break: keep-all;
  }

  .badge {
    font-size: 0.85rem;
  }

  .btn-lg {
    padding: 0.75rem 1.5rem !important;
  }

  .custom-footer .col-md-4 {
    text-align: center;
  }

  .feature-card {
    padding: 1.5rem !important;
  }

  .feature-card p {
    font-size: 0.875rem;
  }

  .feature-card h5 {
    font-size: 1.1rem;
  }

  .btn-outline-primary,
  .btn-primary {
    width: 90px;
    margin: 0 2px;
  }
}