/* ==========================================================================
   솔로랜드 랜딩페이지 — 레이아웃 (헤더 / 푸터 / 공통 그리드)
   ========================================================================== */

html,
body {
  background: var(--color-paper);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-16);
  letter-spacing: -0.01em;
  font-feature-settings: "case" 1;
  overflow-x: clip;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* 스크린리더 전용 텍스트 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-4);
  z-index: 999;
  padding: var(--space-3) var(--space-4);
  background: var(--color-ink);
  color: var(--color-text-inverse);
  font-size: var(--fs-14);
  font-weight: 700;
  transition: top var(--dur-base) var(--ease-out);
}

.skip-link:focus-visible {
  top: var(--space-4);
}

/* ---- 상단 스크롤 진행 바 ---- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--color-primary);
  z-index: var(--z-progress);
  transition: width 80ms linear;
}

/* ---- 헤더: 그림자 없이 1px 라인으로만 경계 ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h-mobile);
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}

@media (min-width: 768px) {
  .site-header {
    height: var(--header-h);
  }
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
  background: rgba(255, 255, 255, 0.96);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-18);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.site-logo__text {
  color: var(--color-ink);
}

.site-logo__mark {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
}

.nav-desktop {
  display: none;
}

@media (min-width: 1024px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: var(--space-8);
  }

  .nav-desktop__list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
  }

  .nav-desktop__link {
    position: relative;
    font-size: var(--fs-14);
    font-weight: 700;
    color: var(--color-text-muted);
    padding: var(--space-2) 0;
    transition: color var(--dur-fast) var(--ease-soft);
  }

  .nav-desktop__link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur-base) var(--ease-out);
  }

  .nav-desktop__link:hover,
  .nav-desktop__link:focus-visible {
    color: var(--color-ink);
  }

  .nav-desktop__link:hover::after,
  .nav-desktop__link:focus-visible::after {
    transform: scaleX(1);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.btn.header-actions__cta {
  display: none;
}

@media (min-width: 1024px) {
  .btn.header-actions__cta {
    display: inline-flex;
  }
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  position: relative;
}

@media (min-width: 1024px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle__bar,
.menu-toggle__bar::before,
.menu-toggle__bar::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-fast);
}

.menu-toggle__bar::before {
  transform: translateY(-6px);
}

.menu-toggle__bar::after {
  transform: translateY(6px);
}

.menu-toggle.is-active .menu-toggle__bar {
  background: transparent;
}

.menu-toggle.is-active .menu-toggle__bar::before {
  transform: rotate(45deg);
}

.menu-toggle.is-active .menu-toggle__bar::after {
  transform: rotate(-45deg);
}

/* ---- 모바일 풀스크린 메뉴 ---- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-menu);
  background: var(--color-paper);
  padding: calc(var(--header-h-mobile) + var(--space-8)) var(--space-6) var(--space-8);
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-menu__link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--fs-28);
  font-weight: 800;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink);
}

@media (min-width: 1024px) {
  .mobile-menu {
    display: none;
  }
}

/* ---- 섹션 공통 ---- */
.section {
  padding-block: var(--space-16);
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-24);
  }
}

/* 배경 교차: 화이트 → 핑크 → 블랙 */
.section--pink {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.section--ink {
  background: var(--color-ink);
  color: var(--color-text-inverse);
}

.section--dim {
  background: var(--color-paper-dim);
}

/* ---- 모바일 하단 sticky CTA 바: 그림자 없이 상단 라인만 ---- */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-sticky-cta);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
  background: var(--color-paper);
  border-top: 1.5px solid var(--color-ink);
  transform: translateY(120%);
  transition: transform var(--dur-base) var(--ease-out);
}

.sticky-cta.is-visible {
  transform: translateY(0);
}

.sticky-cta__text {
  font-size: var(--fs-13);
  font-weight: 700;
  color: var(--color-ink);
}

@media (min-width: 1024px) {
  .sticky-cta {
    display: none;
  }

  .site-footer {
    padding-bottom: var(--space-8);
  }
}

@media (max-width: 1023px) {
  .site-footer {
    padding-bottom: calc(var(--space-8) + 68px);
  }
}

/* ---- 푸터 ---- */
.site-footer {
  background: var(--color-ink);
  color: var(--color-text-inverse);
  padding-block: var(--space-16) var(--space-8);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--color-line-on-ink);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 320px;
}

.footer-brand__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--color-text-inverse);
}

.footer-brand__desc {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--color-text-inverse-muted);
}

.footer-sns {
  display: flex;
  gap: var(--space-3);
}

.footer-sns__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-line-on-ink);
  transition: border-color var(--dur-fast), background var(--dur-fast);
}

.footer-sns__link:hover,
.footer-sns__link:focus-visible {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.footer-nav-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .footer-nav-groups {
    grid-template-columns: repeat(3, minmax(140px, 1fr));
    gap: var(--space-16);
  }
}

.footer-nav-group__title {
  font-size: var(--fs-13);
  font-weight: 700;
  color: var(--color-text-inverse-muted);
  margin-bottom: var(--space-4);
  letter-spacing: 0.02em;
}

.footer-nav-group__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-group__link {
  font-size: var(--fs-14);
  color: rgba(255, 255, 255, 0.82);
  transition: color var(--dur-fast);
}

.footer-nav-group__link:hover,
.footer-nav-group__link:focus-visible {
  color: var(--color-primary);
}

.footer-legal {
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--fs-12);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.42);
}

.footer-legal__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--space-3);
}

.footer-legal__copyright {
  margin-top: var(--space-2);
}