/* index.html 전용 레이아웃 — 공통은 common.css */

/* 메인: 헤더를 히어로 위에 absolute */
body.main-page .site-header {
  position: absolute;
  inset: 0 0 auto;
}

.main-shell {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* ===== Hero ===== */
.main-hero {
  position: relative;
  flex: 1 1 auto;
  min-height: 100svh;
  overflow: hidden;
  display: grid;
  place-items: center;
  background:
    linear-gradient(90deg, rgba(196, 140, 178, 0.2), rgba(255, 255, 255, 0.06) 42%, rgba(212, 140, 175, 0.16)),
    radial-gradient(ellipse at 12% 55%, rgba(196, 140, 178, 0.18), rgba(196, 140, 178, 0) 42%),
    radial-gradient(ellipse at 90% 38%, rgba(219, 130, 176, 0.16), rgba(219, 130, 176, 0) 42%);
}

.main-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.22) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
}

.main-hero__deco {
  position: absolute;
  z-index: 2;
  width: var(--deco-sq);
  height: calc(var(--deco-sq) * 8);
  object-fit: cover;
  pointer-events: none;
  opacity: 0.95;
}

.main-hero__deco--tl {
  top: 17%;
  left: var(--side-gutter);
  object-position: top center;
}

.main-hero__deco--tr {
  top: 17%;
  right: var(--side-gutter);
  object-position: top center;
  transform: scaleX(-1);
}

.main-hero__deco--bl {
  bottom: var(--bottom-gutter);
  left: var(--side-gutter);
  object-position: bottom center;
}

.main-hero__deco--br {
  bottom: var(--bottom-gutter);
  right: var(--side-gutter);
  object-position: bottom center;
  transform: scaleX(-1);
}

.main-hero__center {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.main-hero__center > * {
  pointer-events: auto;
}

.main-hero__visual {
  position: relative;
  z-index: 1;
  width: min(74vh, 820px);
  margin-top: 1vh;
  margin-bottom: clamp(6.5rem, 13vh, 9.5rem);
}

.main-hero__hujun {
  width: 100%;
  filter: drop-shadow(0 18px 40px rgba(0, 80, 140, 0.18));
}

.main-hero__bottom {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.main-hero__bottom > * {
  pointer-events: auto;
}

.main-hero__sponsors {
  position: absolute;
  left: calc(var(--side-gutter) + var(--deco-sq) + 1.75rem);
  bottom: var(--bottom-gutter);
  display: grid;
  gap: 0.55rem;
  width: max-content;
  max-width: min(38vw, 370px);
}

.main-hero__sponsor-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.main-hero__sponsor-label {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.9rem;
  height: 1.5rem;
  padding: 0 0.55rem;
  border-radius: 999px;
  background: #004097;
  color: #fff;
  font-family: var(--font-ui);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
}

.main-hero__sponsor-group {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  min-width: 0;
}

.main-hero__sponsors img {
  width: auto;
  height: clamp(1.35rem, 2.05vw, 1.75rem);
}

.main-hero__info {
  position: absolute;
  left: 50%;
  bottom: clamp(5.5rem, 11vh, 8rem);
  transform: translateX(-50%);
  width: min(90vw, 480px);
  text-align: center;
}

.main-hero__box {
  width: 100%;
  height: auto;
  margin-inline: auto;
}

.main-hero__note {
  margin: 0.7rem 0 0;
  font-size: clamp(0.92rem, 1.55vw, 1.12rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #004097;
}

/* Motion */
@media (prefers-reduced-motion: no-preference) {
  .main-hero__hujun {
    animation: float-y 4.8s ease-in-out infinite;
  }

  .main-hero__info {
    animation: fade-up-center 0.8s var(--ease) 0.28s both;
  }

  .main-hero__sponsors {
    animation: fade-up-left 0.8s var(--ease) 0.15s both;
  }
}

@media (prefers-reduced-motion: no-preference) and (max-width: 1024px) {
  .main-hero__info,
  .main-hero__sponsors {
    animation: fade-up 0.8s var(--ease) 0.2s both;
  }
}

@keyframes float-y {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-up-center {
  from {
    opacity: 0;
    transform: translate(-50%, 16px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@keyframes fade-up-left {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .main-hero__visual {
    width: min(68vw, 480px);
    margin: 0;
  }

  .main-hero__deco {
    --deco-sq: 11px;
    width: var(--deco-sq);
    height: calc(var(--deco-sq) * 8);
  }

  .main-hero__deco--tl,
  .main-hero__deco--tr {
    top: calc(var(--header-h) + 1.85rem);
  }

  .main-hero__deco--tl,
  .main-hero__deco--bl {
    left: var(--side-gutter);
  }

  .main-hero__deco--tr,
  .main-hero__deco--br {
    display: block;
    right: var(--side-gutter);
  }

  .main-hero__deco--bl,
  .main-hero__deco--br {
    bottom: calc(var(--bottom-gutter) + 3.75rem);
  }

  .main-hero__center {
    position: relative;
    inset: auto;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    width: 100%;
    padding: calc(var(--header-h) + 0.5rem) var(--side-gutter) 0.5rem;
    box-sizing: border-box;
  }

  .main-hero__bottom {
    position: relative;
    inset: auto;
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 0.65rem var(--side-gutter) var(--bottom-gutter);
    box-sizing: border-box;
  }

  .main-hero__info {
    position: static;
    left: auto;
    bottom: auto;
    transform: none;
    width: min(88vw, 400px);
  }

  .main-hero__sponsors {
    position: static;
    left: auto;
    bottom: auto;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    gap: 0.4rem 0.55rem;
    width: 100%;
    max-width: min(92vw, 450px);
  }

  .main-hero {
    display: flex;
    flex-direction: column;
    place-items: stretch;
  }

  .main-hero__sponsor-row {
    gap: 0.3rem;
    flex: 0 1 auto;
    min-width: 0;
  }

  .main-hero__sponsor-label {
    min-width: 2.25rem;
    height: 1.25rem;
    font-size: 0.64rem;
    padding: 0 0.36rem;
  }

  .main-hero__sponsor-group {
    gap: 0.36rem;
  }

  .main-hero__sponsors img {
    height: clamp(1.05rem, 3.3vw, 1.25rem);
  }
}

@media (max-width: 640px) {
  .main-hero__visual {
    width: min(78vw, 380px);
  }

  .main-hero__deco {
    --deco-sq: 10px;
  }

  .main-hero__center {
    gap: 0.65rem;
    padding-top: calc(var(--header-h) + 0.35rem);
  }

  .main-hero__info {
    width: min(80vw, 340px);
  }

  .main-hero__note {
    font-size: 0.72rem;
    margin-top: 0.45rem;
  }

  .main-hero__bottom {
    padding-bottom: max(var(--bottom-gutter), env(safe-area-inset-bottom, 0px));
  }

  .main-hero__sponsors {
    gap: 0.3rem 0.4rem;
    max-width: 100%;
  }

  .main-hero__sponsor-label {
    min-width: 2rem;
    height: 1.1rem;
    font-size: 0.58rem;
  }

  .main-hero__sponsors img {
    height: clamp(0.9rem, 3.5vw, 1.08rem);
  }
}

@media (max-width: 480px) {
  .main-hero__sponsors {
    display: grid;
    grid-template-columns: repeat(2, max-content);
    justify-content: center;
    justify-items: start;
    align-items: center;
    gap: 0.45rem 0.85rem;
    width: max-content;
    max-width: 100%;
  }

  .main-hero__sponsor-row:last-child {
    grid-column: 1 / -1;
    justify-self: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .main-hero__hujun,
  .main-hero__info,
  .main-hero__sponsors {
    animation: none !important;
  }
}