/* Main Page Styles */


body {
    margin: 0;
    padding: 0;
    width: 100%;
    background-color: #ffffff;
}

/* Reset basics */
p { margin: 0; padding: 0; }
a { text-decoration: none; color: inherit; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }

.main-page {
    position: relative;
    width: 100%;
    display: flex;
    flex-direction: column;
    background-color: white;
    margin: 0 auto;
    overflow-x: hidden;
}

/* =========================================
   Footer (from index.css - 동적 로드)
   ========================================= */
#footer-container {
    width: 100%;
    margin: 0;
    padding: 0;
    line-height: 0;
    font-size: 0;
    background: var(--color-primary);
}

/* =========================================
   CONTENT SECTION 4: UNDER THE MOONLIGHT (from index.css)
   ========================================= */
.content-4 {
    position: relative;
    width: 100%;
    min-height: 400px;
    height: 50vh;
    max-height: 620px;
    overflow: hidden;
    background-color: #1a1a1a;
}

.content-4-bg {
    position: absolute;
    inset: 0;
    background-image: url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e?w=2000&q=80');
    background-size: cover;
    background-position: center;
}

.content-4-text {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 0 8%;
}

.content-4-text h2 {
    font-family: var(--font-en-main);
    font-weight: 700;
    font-size: clamp(30px, 3.5vw, 46px);
    line-height: 1.3;
    color: white;
    margin: 0 0 20px 0;
}

.content-4-text p {
    font-family: var(--font-ko-main);
    font-weight: 700;
    font-size: clamp(16px, 1.6vw, 22px);
    line-height: 1.5;
    color: white;
    margin: 0;
}

/* =========================================
   Con Section (Content)
   Top: 960px, Height: 1730px
   ========================================= */
.section-con {
    position: relative;
    width: 100%;
    height: auto;
    background-color: var(--color-primary);
    overflow: hidden;
    padding: 182px 0 174px;
    box-sizing: border-box;
}


.con-block {
    position: relative;
    width: 100%;
    padding: 0 8vw;
    display: flex;
    gap: 5vw;
    align-items: center;
    box-sizing: border-box;
}

.block-2 {
    margin-top: 114px; /* top:876 - top:182 - height:580 = 114px */
}

.txt-content {
    flex: 0 1 450px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: flex-end;
    text-align: right;
    position: relative;
}

.txt-content.align-start {
    align-items: flex-start;
    text-align: left;
}

.prologue-title {
    font-family: var(--font-en-main);
    font-weight: 700;
    font-size: 54px;
    color: black;
    letter-spacing: -0.81px;
    line-height: 1.3;
    text-align: left;
    position: absolute;
    top: 182px;
    left: 150px;
    max-width: 1600px;
}

.chapter-title {
    font-family: var(--font-ko-main);
    font-weight: 700;
    font-size: 28px;
    color: var(--color-secondary);
    letter-spacing: -0.42px;
}

.desc-text {
    font-family: var(--font-ko-sub);
    font-weight: 500;
    font-size: 18px;
    color: rgba(0,0,0,0.8);
    line-height: 1.5;
}

/* ---- img-grid: 계단식(스태거) 아코디언 갤러리 ---- */
.img-grid {
    display: flex;
    flex: 1 1 0;
    min-width: 0;
    height: 580px;
    gap: 5px;
    overflow: hidden;
    align-items: flex-start;
}

.img-grid.reverse {
    flex-direction: row-reverse;
}

/* ---- 아코디언 아이템 (레이아웃 전환) ----
   컨테이너 1350px, gap 10px×4 = 40px → 아이템 공간 1310px
   비활성 4개 × 60px = 240px → 활성 = 1070px
   flex-basis px→px 전환만 사용 (flex-grow 전환은 브라우저 보간 불가) */
.img-item {
    flex: 0 0 3vw;
    overflow: hidden;
    cursor: pointer;
    transition-property: flex-basis !important;
    transition-duration: 1600ms !important;
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1) !important;
}

/* 단조 증가: 0 → 20 → 40 → 60 → 80 (한 방향 계단) */
.img-item.i1 { margin-top: 0;     height: 500px; }
.img-item.i2 { margin-top: 20px;  height: 500px; }
.img-item.i3 { margin-top: 40px;  height: 500px; }
.img-item.i4 { margin-top: 60px;  height: 500px; }
.img-item.i5 { margin-top: 80px;  height: 500px; }

/* 활성 상태: 컨테이너 너비에서 비활성(4×4vw) + gap(4×10px) 제외한 나머지 */
.img-item.is-active {
    flex-basis: calc(100% - 12vw - 20px) !important;
}

/* ---- 이미지 내부 효과 (딜레이 분리) ---- */
.img-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition-property: transform, opacity !important;
    transition-duration: 1100ms, 1100ms !important;
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1) !important;
    transition-delay: 120ms, 120ms !important;
    will-change: transform;
}

.img-item.is-active img {
    transform: scale(1.03);
}

/* =========================================
   MAIN HERO SECTION (from index.css)
   ========================================= */
.main-section {
    position: relative;
    width: 100%;
    height: 960px;
    overflow: hidden;
}

.main-bg {
    position: absolute;
    inset: 0;
    transition: transform 0.1s linear;
}

.main-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1.2s ease;
}

.main-slide.active {
    opacity: 1;
}

.main-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1);
}

.main-content {
    position: absolute;
    left: 150px;
    top: 0;
    z-index: 1;
    padding-top: 180px;
    max-width: 1600px;
    opacity: 0;
    animation: heroFadeIn 1.2s ease forwards 0.3s;
}

.main-section .main-title {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: clamp(28px, 3vw, 40px);
    line-height: 1.6;
    color: white;
    letter-spacing: -0.6px;
    text-shadow: 0px 0px 4px rgba(0, 0, 0, 0.15);
    margin: 0;
    position: static;
    transform: none;
    white-space: normal;
}

.title-divider {
    width: 658px;
    height: 3px;
    background: rgba(255, 255, 255, 0.3);
    margin-top: 12px;
    position: relative;
    overflow: hidden;
}

.title-divider .bar-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: white;
    transform-origin: left;
    transform: scaleX(0);
    animation: progressFill 4s linear infinite;
}

.main-subtitle {
    font-family: var(--font-ko-main);
    font-weight: 700;
    font-size: clamp(18px, 1.8vw, 24px);
    line-height: 1.5;
    color: white;
    letter-spacing: -0.36px;
    text-shadow: 0px 0px 4px rgba(0, 0, 0, 0.2);
    margin: 24px 0 0;
}

.main-arrow {
    position: absolute;
    left: 50%;
    bottom: 40px;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 24px;
    z-index: 1;
    opacity: 0;
    animation: heroFadeIn 1s ease forwards 1s;
}

.arrow-left,
.arrow-right {
    width: 9px;
    height: 9px;
    border-left: 1px solid white;
    border-bottom: 1px solid white;
}

.arrow-left {
    transform: rotate(45deg);
}

.arrow-right {
    transform: rotate(-135deg);
}

.arrow-number {
    font-family: var(--font-en-main);
    font-size: 26px;
    line-height: 36px;
    color: white;
    letter-spacing: -0.39px;
    margin: 0;
}

.arrow-divider {
    width: 10px;
    height: 1px;
    background: white;
    transform: rotate(90deg);
}

@keyframes progressFill {
    0% { transform: scaleX(0); }
    100% { transform: scaleX(1); }
}

@keyframes heroFadeIn {
    to { opacity: 1; }
}

/* =========================================
   NAVIGATION (HEADER) - from index.css
   ========================================= */
.index-page {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    max-width: none;
    height: 160px;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), transparent);
    z-index: 999;
    pointer-events: none;
    overflow: visible;
}

.index-page .site-header,
.index-page .header-dropdown {
    pointer-events: auto;
}

/* =========================================
   TABLET RESPONSIVE (max-width: 1100px)
   ========================================= */
@media (max-width: 1400px) {
    .section-con {
        padding-top: 80px;
    }

    .prologue-title {
        margin-top: 0;
    }

    .con-block {
        flex-direction: column;
        align-items: center;
        gap: 30px;
        padding: 30px 20px;
    }

    .block-1 .img-grid {
        order: -1;
    }

    .block-2 {
        margin-top: 60px;
    }

    .txt-content,
    .txt-content.align-start {
        flex: none;
        width: 100%;
        align-items: center;
        text-align: center;
    }

    .chapter-title {
        text-align: center;
        font-size: 26px;
    }

    .desc-text {
        text-align: center;
    }

    .img-grid,
    .img-grid.reverse {
        flex: none;
        width: 90%;
        height: 400px;
    }

    .img-item {
        flex: 0 0 30px;
        transition-property: flex-basis !important;
        transition-duration: 1600ms !important;
        transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1) !important;
    }

    .img-item.is-active {
        flex-basis: calc(100% - 120px - 40px) !important;
    }

    .img-item.i1,
    .img-item.i2,
    .img-item.i3,
    .img-item.i4,
    .img-item.i5 {
        height: 380px;
        margin-top: 0;
    }

    .prologue-title {
        position: relative;
        top: auto;
        left: auto;
        font-size: 36px;
        text-align: center;
        width: 100%;
        padding: 0 20px;
        margin-top: 100px;
    }
}

@media (max-width: 900px) {
    .img-item:not(.is-active) {
        display: none;
    }

    .img-item.is-active {
        flex-basis: 100% !important;
    }
}

/* =========================================
   MOBILE RESPONSIVE (max-width: 768px)
   ========================================= */
@media (max-width: 768px) {

    /* --- NAVIGATION GRADIENT --- */
    .index-page {
        height: 100px;
    }

    /* --- HERO SECTION --- */
    .main-section {
        height: 500px;
        min-height: auto;
        max-height: none;
    }

    .main-bg {
        display: flex;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
    }

    .main-bg::-webkit-scrollbar {
        display: none;
    }

    .main-slide {
        position: relative;
        inset: auto;
        flex: 0 0 100%;
        width: 100%;
        height: 100%;
        opacity: 1;
        scroll-snap-align: start;
    }

    .main-slide img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .main-content {
        left: 0;
        right: 0;
        padding-top: 100px;
        max-width: none;
        text-align: center;
        pointer-events: none;
    }

    .main-title,
    .main-subtitle {
        text-align: center;
        padding: 0 20px;
        white-space: normal;
        word-break: keep-all;
    }

    .main-title br,
    .main-subtitle br {
        display: none;
    }

    .title-divider {
        width: 80%;
        margin-left: auto;
        margin-right: auto;
    }

    .main-arrow {
        gap: 16px;
    }

    /* --- 모바일 레이아웃 --- */
    .content-4 {
        height: 250px;
        min-height: auto;
        max-height: none;
    }

    .content-4-text {
        padding: 0 20px;
    }

    /* --- 갤러리: 1열 세로 스택 --- */
    .section-con .con-block {
        position: relative;
        width: 100%;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        gap: 30px;
        padding: 30px 0;
        margin-left: 0 !important;
        margin-top: 0 !important;
        box-sizing: border-box;
    }

    .section-con .con-block .txt-content {
        display: contents;
    }

    .section-con .con-block .prologue-title,
    .section-con .con-block .chapter-title {
        order: -2;
        text-align: center;
        padding-left: 20px;
        padding-right: 20px;
    }

    .section-con .con-block .chapter-title {
        font-size: 22px;
    }

    .section-con .con-block .desc-text {
        padding-left: 20px;
        padding-right: 20px;
        text-align: center;
    }

    .section-con .con-block .img-grid {
        order: -1;
    }

    .section-con .con-block .desc-text {
        order: 0;
    }

    .section-con {
        padding: 0;
    }

    /* --- 갤러리: 가로 롤링 슬라이드 --- */
    .img-grid,
    .img-grid.reverse {
        flex: none;
        width: 100%;
        height: 250px;
        flex-direction: row;
        gap: 0;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .img-grid::-webkit-scrollbar {
        display: none;
    }

    .img-item,
    .img-item.i1,
    .img-item.i2,
    .img-item.i3,
    .img-item.i4,
    .img-item.i5 {
        flex: 0 0 100% !important;
        width: 100%;
        height: 100%;
        margin-top: 0;
        scroll-snap-align: start;
        transition: none !important;
    }

    .img-item.is-active {
        flex-basis: 100% !important;
        height: 100%;
    }

    .txt-content {
        flex: none;
        width: 100%;
        text-align: center;
        align-items: center;
    }

}