/* Hero Banner */
.hero-banner {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    background-image: url('images/background/about_background.jpg');
    background-size: cover;
    background-position: top center;
    background-blend-mode: overlay;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hero-overlay {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-overlay::before {
    content: '';
    flex: 1;
}

.hero-overlay::after {
    content: '';
    flex: 2;
}

.hero-content {
    text-align: center;
    color: #fff;
    text-shadow: 0 0 3px rgba(0, 0, 0, 0.5);
}

.hero-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.hero-subtitle {
    font-size: 4.5rem;
    font-weight: 700;
}

/* Video Section */
.video-section {
    padding: 80px 0;
    background-color: #fff;
}

.video-wrapper {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* About DXN Section */
.about-dxn {
    padding: 80px 0;
    background-color: #fff;
}

.section-title {
    text-align: center;
    color: #1e244f;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.about-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 30px;
}

.about-card {
    text-align: center;
}

.card-image {
    width: 100%;
    height: 360px;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    overflow: hidden;
}

.placeholder-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background-color: #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 14px;
}

.card-title {
    color: #2c2c2c;
    font-size: 16px;
}

/* DXN Concept Section */
.dxn-concept {
    padding: 80px 0;
    background-color: #b8c4e0;
}

.dxn-concept .container {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 60px;
    align-items: start;
}

.concept-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0;
    text-align: left;
    align-self: center;
}

.concept-boxes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.concept-box {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.box-title {
    color: #1e244f;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    text-align: center;
}

.box-text {
    color: #666;
    line-height: 1.6;
    font-size: 15px;
    font-style: italic;
}

/* DXN Philosophy Section */
.dxn-philosophy {
    padding: 80px 0;
    background-color: #fff;
}

.dxn-philosophy .container {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 60px;
    align-items: center;
}

.philosophy-title {
    color: #2c2c2c;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0;
    text-align: left;
    align-self: center;
}

.philosophy-box {
    background-color: #fff;
    border: 1px solid #ddd;
    padding: 40px;
    border-radius: 8px;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.philosophy-main-title {
    color: #1e244f;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    text-align: center;
}

.philosophy-text {
    color: #666;
    line-height: 1.6;
    font-size: 15px;
    font-style: italic;
    text-align: justify;
}

/* Corporate Identity Section */
.corporate-identity {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.identity-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 30px;
    margin-bottom: 20px;
}

.identity-title {
    color: #2c2c2c;
    font-size: 3rem;
    font-weight: 700;
}

.identity-title {
    margin-right: auto;
}

.logo-display {
    text-align: center;
}

.main-logo {
    max-width: 100%;
    height: auto;
    padding: 10px;
}

.color-explanations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.color-box {
    background-color: #fff;
    padding: 40px;
    border: 1px solid rgba(0,0,0,0.08);
    box-shadow: 0 6px 16px rgba(0,0,0,0.15);
    position: relative;
}

.color-box::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 30px;
}

.red-box::before { background-color: #e63312; }
.green-box::before { background-color: #009e3d; }
.blue-box::before { background-color: #213a8f; }

.color-title {
    font-size: 2rem;
    font-weight: 700;
    margin: 16px 0 12px;
    text-transform: uppercase;
    text-align: left;
}

.red-box .color-title {
    color: #e63312;
}

.green-box .color-title {
    color: #009e3d;
}

.blue-box .color-title {
    color: #213a8f;
}

.red-accent { color: #e63312; font-weight: 700; }
.green-accent { color: #009e3d; font-weight: 700; }
.blue-accent { color: #213a8f; font-weight: 700; }

.color-text {
    color: #2c2c2c;
    line-height: 1.7;
    text-align: left;
}

/* Gallery Section */
.gallery-section {
    padding: 80px 0;
    background: url('images/background/gallery_background.jpg') center/cover no-repeat;
    color: #fff;
}

.gallery-title {
    text-align: center;
    color: #333;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 30px;
}

.gallery-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 100px;
}

.gallery-item {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    color: #fff;
    transition: color 0.2s ease;
}

.gallery-label { 
    font-size: 24px; 
    font-weight: 500; 
    line-height: 1; 
    transition: color 0.25s ease; 
}

.gallery-icon {
    height: 96px;
    display: inline-block;
    margin: 12px;

    /* start as white */
    background-color: white;

    /* use the image as a mask */
    transition: background-color 0.25s ease;
}

.photo-icon {
    width: 119.383px;
    -webkit-mask: url('images/icon/about_Photo-icon.png') no-repeat center/contain;
    mask: url('images/icon/about_Photo-icon.png') no-repeat center/contain;
}

.video-icon {
    width: 164.15px;
    -webkit-mask: url('images/icon/about_Video-icon.png') no-repeat center/contain;
    mask: url('images/icon/about_Video-icon.png') no-repeat center/contain;
}

.gallery-icon-img {
    display: none;
}

.gallery-item:hover .gallery-icon {
    /* on hover, change to purple */
    background-color: #1e244f;
}

.gallery-item:hover .gallery-label { color: #1e244f; }

/* Responsive Design */

/* Large Desktop - 1200px and below */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 4rem;
    }
    
    .section-title,
    .concept-title,
    .philosophy-title,
    .identity-title,
    .gallery-title {
        font-size: 2.5rem;
    }
    
    .about-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
    
    .concept-boxes {
        gap: 25px;
    }
    
    .concept-box {
        padding: 25px;
    }
    
    .box-title {
        font-size: 22px;
    }
    
    .philosophy-box {
        padding: 35px;
    }
    
    .philosophy-main-title {
        font-size: 22px;
    }
    
    .color-box {
        padding: 35px;
    }
    
    .color-title {
        font-size: 1.8rem;
    }
    
    .gallery-actions {
        gap: 80px;
    }
    
    .gallery-label {
        font-size: 22px;
    }
    
    .gallery-icon-img {
        height: 110px;
    }
}

/* Desktop - 992px and below */
@media (max-width: 992px) {
    .hero-title {
        font-size: 1.6rem;
    }
    
    .hero-subtitle {
        font-size: 3.5rem;
    }
    
    .section-title,
    .concept-title,
    .philosophy-title,
    .identity-title,
    .gallery-title {
        font-size: 2.2rem;
    }
    
    .card-image {
        height: 320px;
    }
    
    .dxn-concept .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .concept-title {
        text-align: center;
    }
    
    .concept-box {
        padding: 20px;
    }
    
    .box-title {
        font-size: 20px;
    }
    
    .box-text {
        font-size: 14px;
    }
    
    .dxn-philosophy .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .philosophy-title {
        text-align: center;
    }
    
    .philosophy-box {
        padding: 30px;
    }
    
    .philosophy-main-title {
        font-size: 20px;
    }
    
    .philosophy-text {
        font-size: 14px;
    }
    
    .identity-title {
        font-size: 2.2rem;
    }
    
    .color-explanations {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .color-box {
        padding: 30px;
    }
    
    .color-title {
        font-size: 1.6rem;
    }
    
    .gallery-actions {
        gap: 60px;
    }
    
    .gallery-label {
        font-size: 20px;
    }
    
    .gallery-icon-img {
        height: 100px;
    }
}

/* Tablet - 768px and below */
@media (max-width: 768px) {
    .hero-title {
        font-size: 1.4rem;
    }
    
    .hero-subtitle {
        font-size: 3rem;
    }
    
    .section-title,
    .concept-title,
    .philosophy-title,
    .identity-title,
    .gallery-title {
        font-size: 2rem;
    }

    .about-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .card-image {
        height: 280px;
    }
    
    .card-title {
        font-size: 15px;
    }
    
    .concept-box {
        padding: 18px;
    }
    
    .box-title {
        font-size: 18px;
    }
    
    .box-text {
        font-size: 13px;
    }
    
    .philosophy-box {
        padding: 25px;
    }
    
    .philosophy-main-title {
        font-size: 18px;
    }
    
    .philosophy-text {
        font-size: 13px;
    }
    
    .identity-title {
        font-size: 2rem;
    }
    
    .color-explanations {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .color-box {
        padding: 25px;
    }
    
    .color-title {
        font-size: 1.4rem;
    }
    
    .color-text {
        font-size: 14px;
    }
    
    .gallery-actions {
        gap: 40px;
    }
    
    .gallery-label {
        font-size: 18px;
    }
    
    .gallery-icon-img {
        height: 90px;
    }
}

/* Mobile Large - 576px and below */
@media (max-width: 576px) {
    .hero-title {
        font-size: 1.2rem;
    }
    
    .hero-subtitle {
        font-size: 2.5rem;
    }
    
    .section-title,
    .concept-title,
    .philosophy-title,
    .identity-title,
    .gallery-title {
        font-size: 1.8rem;
    }
    
    .about-cards {
        gap: 15px;
    }
    
    .card-image {
        height: 250px;
    }
    
    .card-title {
        font-size: 14px;
    }
    
    .concept-box {
        padding: 15px;
    }
    
    .box-title {
        font-size: 16px;
    }
    
    .box-text {
        font-size: 12px;
    }
    
    .philosophy-box {
        padding: 20px;
    }
    
    .philosophy-main-title {
        font-size: 16px;
    }
    
    .philosophy-text {
        font-size: 12px;
    }
    
    .identity-title {
        font-size: 1.8rem;
    }
    
    .color-box {
        padding: 20px;
    }
    
    .color-title {
        font-size: 1.2rem;
    }
    
    .color-text {
        font-size: 13px;
    }
    
    .gallery-actions {
        gap: 30px;
    }
    
    .gallery-label {
        font-size: 16px;
    }
    
    .gallery-icon-img {
        height: 80px;
    }
}

/* Mobile Small - 480px and below */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1rem;
    }
    
    .hero-subtitle {
        font-size: 2rem;
    }
    
    .section-title,
    .concept-title,
    .philosophy-title,
    .identity-title,
    .gallery-title {
        font-size: 1.5rem;
    }
    
    .card-image {
        height: 220px;
    }
    
    .card-title {
        font-size: 13px;
    }
    
    .concept-box {
        padding: 12px;
    }
    
    .box-title {
        font-size: 14px;
    }
    
    .box-text {
        font-size: 11px;
    }
    
    .philosophy-box {
        padding: 16px;
    }
    
    .philosophy-main-title {
        font-size: 14px;
    }
    
    .philosophy-text {
        font-size: 11px;
    }
    
    .identity-title {
        font-size: 1.5rem;
    }
    
    .color-box {
        padding: 16px;
    }
    
    .color-title {
        font-size: 1rem;
    }
    
    .color-text {
        font-size: 12px;
    }
    
    .gallery-actions {
        gap: 20px;
    }
    
    .gallery-label {
        font-size: 14px;
    }
    
    .gallery-icon-img {
        height: 70px;
    }
}