/* Premium Materials & Design Section - Apple Style */
.premium-materials-section {
    width: 100%;
    background: #000;
    color: #fff;
    padding: 0;
    overflow: hidden;
    position: relative;
}

.premium-container {
    max-width: 100%;
    margin: 0 auto;
}

/* Premium Split Layout */
.premium-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
    align-items: center;
    gap: 0;
    padding: 0;
    position: relative;
    padding: 0;
    position: relative;
    /* Removed opacity/transform/transition as animation is moved to children */
}

/* Removed .premium-split.active */

.premium-split.materials-split {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
}

.premium-split.materials-split .premium-content {
    align-items: flex-end;
    text-align: right;
}

.premium-split.design-split {
    background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
    grid-template-columns: 1fr 1fr;
}

/* Premium Content - Unified Style */
.premium-content {
    padding: 100px 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    z-index: 2;
}

.premium-title {
    font-size: 72px;
    font-weight: 700;
    line-height: 1.15;
    margin: 0 0 32px 0;
    color: #fff;
    letter-spacing: -0.02em;
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s;
}

.premium-content.active .premium-title {
    opacity: 1;
    transform: translateY(0);
}

.premium-description {
    font-size: 20px;
    line-height: 1.7;
    color: #d1d1d6;
    margin: 0 0 56px 0;
    font-weight: 400;
    letter-spacing: -0.01em;
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s;
}


.premium-content.active .premium-description {
    opacity: 1;
    transform: translateY(0);
}

/* Premium Features */
.premium-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 24px;
}

.feature-item {
    text-align: left;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.premium-content.active .feature-item:nth-child(1) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.5s;
}

.premium-content.active .feature-item:nth-child(2) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.6s;
}

.premium-content.active .feature-item:nth-child(3) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.7s;
}

.feature-number {
    font-size: 56px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1;
    letter-spacing: -0.03em;
}

.feature-text {
    font-size: 15px;
    color: #a1a1a6;
    font-weight: 500;
    letter-spacing: -0.01em;
}

/* Premium Image Wrapper */
.premium-image-wrapper {
    position: relative;
    height: 100%;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    padding: 0;
}

/* 최고의 자재: 이미지를 타이틀 쪽으로 15% 더 가깝게 */
.materials-split .premium-image-wrapper {
    margin-left: -15%;
}

.premium-image {
    width: 100%;
    height: 100%;
    max-height: 85vh;
    object-fit: contain;
    opacity: 0;
    /* Use !important to override generic scroll-reveal translateY */
    transform: scale(0.9) !important;
    transition: all 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.3s !important;
    filter: drop-shadow(0 20px 60px rgba(0, 0, 0, 0.5));
    padding: 60px;
}

.premium-image.active {
    opacity: 1 !important;
    transform: scale(1) !important;
}

.premium-image:hover {
    transform: scale(1.02);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Premium Statement */
.premium-statement {
    text-align: center;
    padding: 120px 60px;
    background: linear-gradient(180deg, #000 0%, #0a0a0a 100%);
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.premium-statement.active {
    opacity: 1;
    transform: translateY(0);
}

.statement-text {
    font-size: 52px;
    font-weight: 600;
    line-height: 1.4;
    color: #f5f5f7;
    margin: 0;
    letter-spacing: -0.02em;
}

.statement-text .highlight {
    color: #fff;
    font-weight: 700;
    letter-spacing: -0.03em;
}

/* Portfolio Button */
.portfolio-button {
    display: inline-block;
    margin-top: 40px;
    padding: 18px 48px;
    background: #fff;
    color: #000;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    letter-spacing: -0.01em;
}

.portfolio-button:hover {
    background: #f5f5f7;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.2);
}

/* Brochure Bonus Section - Hyphen Design Style */
.brochure-bonus-section {
    width: 100%;
    padding: 120px 60px;
    background: #fff;
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    z-index: 1;
}

.brochure-bonus-section.active {
    opacity: 1;
    transform: translateY(0);
}

.brochure-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    position: relative;
}

.brochure-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
    width: 100%;
}

.brochure-text {
    text-align: left;
}

.brochure-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.3;
    color: #1a1a1a;
    margin: 0 0 40px 0;
    letter-spacing: -0.02em;
}

.brochure-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 18px 40px;
    background: #1a1a1a;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    border-bottom: 2px solid #1a1a1a;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    letter-spacing: -0.01em;
}

.brochure-download-btn:hover {
    background: #2a2a2a;
    border-bottom-color: #000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.brochure-download-btn svg {
    transition: transform 0.3s ease;
}

.brochure-download-btn:hover svg {
    transform: translateY(2px);
}

/* Brochure Mockup */
.brochure-image {
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
}

.brochure-mockup {
    width: 320px;
    height: 420px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.brochure-mockup:hover {
    transform: rotateY(-5deg) rotateX(2deg) scale(1.02);
}

.brochure-cover {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e8f4ff 0%, #f0f8ff 100%);
    border-radius: 12px;
    padding: 50px 35px;
    box-shadow:
        0 25px 70px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.brochure-cover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, #0066cc 0%, #0099ff 100%);
}

.brochure-logo {
    font-size: 32px;
    font-weight: 800;
    color: #1a1a1a;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.brochure-subtitle {
    font-size: 12px;
    font-weight: 600;
    color: #666;
    letter-spacing: 0.5px;
    margin-bottom: 50px;
}

.brochure-icons {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: auto;
}

.icon-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    border: 1px solid rgba(0, 102, 204, 0.1);
    transition: all 0.3s ease;
}

.icon-item:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
}

/* Navigation Arrows */
.brochure-nav {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid #e5e5e5;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
    color: #666;
}

.brochure-nav:hover {
    background: #1a1a1a;
    border-color: #1a1a1a;
    color: #fff;
    transform: scale(1.1);
}

.brochure-nav:active {
    transform: scale(0.95);
}

.brochure-nav.prev {
    margin-right: 24px;
}

.brochure-nav.next {
    margin-left: 24px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .premium-content {
        padding: 60px 60px;
    }

    .premium-title {
        font-size: 52px;
    }

    .premium-description {
        font-size: 19px;
    }

    .feature-number {
        font-size: 40px;
    }
}

@media (max-width: 834px) {
    .premium-split {
        grid-template-columns: 1fr;
        min-height: auto;
        padding: 60px 0;
    }

    .premium-split.design-split {
        grid-template-columns: 1fr;
    }

    .premium-split.design-split .premium-image-wrapper {
        order: -1;
    }

    .premium-content {
        padding: 40px 40px;
    }

    .premium-title {
        font-size: 40px;
    }

    .premium-description {
        font-size: 17px;
        margin-bottom: 32px;
    }

    .premium-features {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .feature-number {
        font-size: 32px;
    }

    .feature-text {
        font-size: 12px;
    }

    .premium-image-wrapper {
        min-height: 400px;
        padding: 40px 20px;
    }

    /* 모바일에서도 최고의 자재 이미지 타이틀 가깝게 */
    #materials-img-wrapper {
        min-height: auto !important;
        padding: 0 !important;
        margin-top: -20% !important;
        justify-content: center !important;
        display: flex !important;
        margin-bottom: 0 !important;
    }

    #materials-img {
        width: 110% !important;
        max-height: 75vh !important;
        display: block;
    }

    .materials-split {
        padding-bottom: 0 !important;
        overflow: hidden;
    }

    /* 복제 섹션(premium-2) 모바일 - 한 화면에 다 보이게 */
    [data-slide="premium-2"] .premium-split {
        padding: 40px 0 0 0;
    }

    [data-slide="premium-2"] .premium-content {
        padding: 32px 32px 16px;
        align-items: center !important;
        text-align: center !important;
    }

    [data-slide="premium-2"] .premium-title {
        font-size: 28px;
        margin-bottom: 16px;
    }

    [data-slide="premium-2"] .premium-image-wrapper {
        min-height: 260px;
        padding: 0 16px;
        margin-top: -80px;
    }

    [data-slide="premium-2"] .premium-image {
        max-height: 75vh;
        width: 110%;
        margin-left: 10%;
    }

    .premium-image {
        width: 100%;
        max-height: 60vh;
    }

    .premium-statement {
        padding: 80px 40px;
    }

    .statement-text {
        font-size: 32px;
    }

    /* Brochure Section Responsive */
    .brochure-bonus-section {
        padding: 60px 40px;
    }

    .brochure-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .brochure-title {
        font-size: 32px;
    }

    .brochure-mockup {
        width: 240px;
        height: 320px;
    }

    .brochure-nav {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .premium-content {
        padding: 30px 24px;
    }

    .premium-title {
        font-size: 32px;
    }

    .premium-description {
        font-size: 16px;
    }

    .premium-features {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-item {
        text-align: center;
    }

    .feature-number {
        font-size: 36px;
    }

    .premium-image-wrapper {
        min-height: 300px;
        padding: 30px 20px;
    }

    .premium-statement {
        padding: 60px 24px;
    }

    .statement-text {
        font-size: 24px;
    }

    /* Brochure Section Mobile */
    .brochure-bonus-section {
        padding: 40px 24px;
    }

    .brochure-container {
        flex-direction: column;
        gap: 24px;
    }

    .brochure-nav {
        display: none;
    }

    .brochure-title {
        font-size: 26px;
    }

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

    .brochure-mockup {
        width: 200px;
        height: 280px;
    }

    .brochure-cover {
        padding: 30px 20px;
    }

    .brochure-logo {
        font-size: 22px;
    }

    .brochure-subtitle {
        font-size: 10px;
    }
}

/* Smooth Scroll Behavior */
html {
    scroll-behavior: smooth;
}

/* Add subtle parallax effect on scroll */
@media (prefers-reduced-motion: no-preference) {
    .premium-image {
        will-change: transform;
    }
}