:root {
  --iu-navy: #061018;
  --iu-blue: #1f6feb;
  --iu-blue-deep: #0b3d91;
  --iu-blue-soft: #2563eb;
  --iu-line: #c9d7ea;
  --iu-bg: #f5f8fc;
  --iu-panel: #ffffff;
  --iu-text: #152033;
  --iu-muted: #5b6b82;
  /* Footer stays 12px. Guest page minimum text is 13px. */
  --iu-fs-min: 12px;
  --iu-guest-fs-min: 13px;
}

html {
  font-size: 16px;
}

.iu-guest-body {
  margin: 0;
  min-height: 100vh;
  background: var(--iu-bg);
  color: var(--iu-text);
  font-size: 16px;
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
}

.iu-guest-body .small,
.iu-guest-body small,
.iu-guest-body .form-text {
  font-size: var(--iu-guest-fs-min) !important;
  line-height: 1.45;
}

/* Footer excluded from guest min bump */
.iu-guest-body .iu-business-footer,
.iu-guest-body .iu-business-footer.small,
.iu-guest-body .iu-business-footer .small {
  font-size: 14px !important;
  line-height: 1.45;
}

.iu-guest-view {
  display: none;
}

.iu-guest-view.is-active {
  display: block;
}

/* Full-bleed hero: photo left (dark), HTML copy right (light) */
.iu-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  min-height: min(88vh, 760px);
  background: var(--iu-panel);
}

.iu-hero-visual {
  background-image:
    linear-gradient(90deg, rgba(6, 16, 24, 0.08) 0%, rgba(6, 16, 24, 0.2) 75%, rgba(245, 248, 252, 0.92) 100%),
    url("/images/banner-iyoutalk-hero.png");
  background-size: cover;
  background-position: left center;
  background-repeat: no-repeat;
  min-height: 320px;
}

.iu-hero-panel {
  background: var(--iu-panel);
  display: flex;
  align-items: center;
}

.iu-hero-panel-inner {
  width: 100%;
  padding: clamp(1.25rem, 3vw, 2.75rem);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.iu-hero-logo {
  display: block;
  height: 48px;
  width: auto;
  margin-left: auto;
  object-fit: contain;
}

.iu-hero-brand-text {
  margin-top: 0.35rem;
}

.iu-hero-brand-text strong {
  display: block;
  color: var(--iu-text);
  font-size: 16px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.iu-hero-brand-text span {
  display: block;
  color: var(--iu-blue-soft);
  font-size: var(--iu-guest-fs-min);
  letter-spacing: 0.28em;
  margin-top: 0.15rem;
}

.iu-hero-eyebrow {
  color: var(--iu-blue-soft);
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.iu-hero-title {
  font-size: clamp(18px, 2.8vw, 22px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
  color: var(--iu-text);
}

.iu-hero-lead {
  color: var(--iu-muted);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  margin-bottom: 0.5rem;
}

.iu-hero-asta {
  min-height: min(72vh, 640px);
}

.iu-asta-intro {
  background: #fff;
  border-top: 1px solid var(--iu-line);
}

.iu-asta-intro-inner {
  max-width: 720px;
  margin: 0 auto;
}

.iu-asta-intro-heading {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
  color: var(--iu-text);
}

.iu-asta-feature-list {
  font-size: 16px;
  font-weight: 500;
  margin: 0 0 1.5rem;
  padding: 0;
}

.iu-asta-feature-list > div {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: 0.75rem 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid #e8eef6;
}

.iu-asta-feature-list > div:first-child {
  border-top: 1px solid #e8eef6;
}

.iu-asta-feature-list dt {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--iu-blue-deep);
}

.iu-asta-feature-list dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--iu-muted);
}

.iu-asta-intro-body {
  margin: 0 0 1rem;
  font-size: 16px;
  line-height: 1.7;
  color: var(--iu-text);
}

.iu-asta-intro-summary {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.65;
  letter-spacing: -0.02em;
  color: var(--iu-text);
}

.iu-product-sections {
  max-width: 720px;
  margin: 2.5rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--iu-line);
  display: grid;
  gap: 2.75rem;
}

.iu-product-block {
  margin: 0;
}

.iu-product-visual {
  margin: 0 0 1.25rem;
  overflow: hidden;
  border-radius: 0;
  background: #e8eef6;
  aspect-ratio: 16 / 9;
}

.iu-product-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.iu-product-copy .iu-asta-intro-heading {
  margin-bottom: 1rem;
}

.iu-product-copy .iu-asta-feature-list > div {
  grid-template-columns: 9.5rem minmax(0, 1fr);
}

.iu-asta-intro-note {
  margin: 1.25rem 0 0;
  padding: 0.9rem 0 0;
  border-top: 1px solid #e8eef6;
  font-size: 16px;
  line-height: 1.7;
  color: var(--iu-muted);
}

.iu-product-bullets {
  margin: 0 0 0.25rem;
  padding: 0;
  list-style: none;
}

.iu-product-bullets li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.1rem;
  border-bottom: 1px solid #e8eef6;
  font-size: 16px;
  line-height: 1.55;
  color: var(--iu-muted);
}

.iu-product-bullets li:first-child {
  border-top: 1px solid #e8eef6;
}

.iu-product-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15rem;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--iu-blue);
}

.btn-iu-primary {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--iu-blue);
  --bs-btn-border-color: var(--iu-blue);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: #1858c7;
  --bs-btn-hover-border-color: #1858c7;
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #1348a3;
  --bs-btn-active-border-color: #1348a3;
  font-weight: 600;
  white-space: nowrap;
}

.btn-iu-ghost {
  --bs-btn-color: var(--iu-blue-deep);
  --bs-btn-bg: #fff;
  --bs-btn-border-color: #9db7de;
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--iu-blue);
  --bs-btn-hover-border-color: var(--iu-blue);
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: #1348a3;
  --bs-btn-active-border-color: #1348a3;
  font-weight: 600;
  white-space: nowrap;
}

.iu-hero-panel-inner .d-grid.d-sm-flex {
  flex-wrap: nowrap;
}

.iu-hero-panel-inner .btn-lg {
  font-size: 16px;
  padding: 0.7rem 1.1rem;
}

.iu-feature-bar {
  background: #eef3f9;
  border-top: 1px solid #d7e2ef;
}

.iu-feature-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  min-height: 100%;
}

.iu-feature-item i {
  color: var(--iu-blue);
  font-size: 18px;
  line-height: 1;
  margin-top: 0.15rem;
}

.iu-feature-item strong {
  display: block;
  color: var(--iu-text);
  font-size: 16px;
  margin-bottom: 0.2rem;
}

.iu-feature-item span {
  display: block;
  color: var(--iu-muted);
  font-size: 16px;
  line-height: 1.4;
}

.iu-subpage {
  background: var(--iu-panel);
  border: 1px solid var(--iu-line);
  border-radius: 1rem;
  padding: 1.5rem;
  color: var(--iu-text);
  box-shadow: 0 8px 24px rgba(21, 32, 51, 0.06);
}

.iu-subpage .text-white {
  color: var(--iu-text) !important;
}

.iu-auth-code {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--iu-text);
}

.iu-guest-footer {
  border-top: 1px solid #d7e2ef;
  background: #fff;
}

.iu-guest-footer a:hover {
  color: var(--iu-blue) !important;
}

@media (max-width: 991.98px) {
  .iu-hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .iu-hero-visual {
    min-height: 220px;
    background-position: 20% center;
    background-image:
      linear-gradient(180deg, rgba(6, 16, 24, 0.05) 0%, rgba(245, 248, 252, 0.55) 100%),
      url("/images/banner-iyoutalk-hero.png");
  }

  .iu-hero-panel-inner {
    max-width: none;
    padding: 1.25rem 1rem 1.75rem;
  }

  .iu-hero-title br {
    display: none;
  }

  .iu-asta-feature-list > div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}