:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --text-muted: #666666;
    --gap: 4px;
    --font-family: Tahoma, sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 64px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.nav-left {
    display: flex;
    gap: 24px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 18px;
    font-weight: 400;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-color);
}

.nav-link.active {
    font-weight: 600;
}

.nav-right {
    position: absolute;
    left: calc(100% - 176px);
}

.brand-name {
    text-decoration: none;
    color: var(--text-color);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.05em;
}

/* Gallery Grid */
.gallery-container {
    padding: 120px 200px 48px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: var(--gap);
    max-width: 100%;
    margin: 0 auto;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    display: block;
    aspect-ratio: 4 / 3;
    background-color: #f5f5f5;
    text-decoration: none;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    display: block;
}

.gallery-item:hover img {
    transform: scale(1.03);
}

.overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 32px;
    background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0) 100%);
    color: #ffffff;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
}

.gallery-item:hover .overlay {
    opacity: 1;
    transform: translateY(0);
}

.overlay h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.overlay p {
    font-size: 15px;
    font-weight: 400;
    opacity: 0.8;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 48px;
    right: 48px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: #f0f0f0;
    color: var(--text-color);
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: #e0e0e0;
    transform: translateY(-2px);
}

/* Responsive */
/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    padding: 8px;
    margin-right: -8px;
    z-index: 101;
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #ffffff;
    z-index: 200;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.mobile-menu-close {
    position: absolute;
    top: 20px;
    right: 24px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    padding: 8px;
    margin-right: -8px;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.mobile-nav-link {
    font-size: 20px;
    text-decoration: none;
    color: var(--text-muted);
    transition: var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: var(--text-color);
    font-weight: 600;
}

/* About Page Styles */
.about-container {
    padding-top: 64px;
}

.about-hero {
    width: 100%;
    height: 50vh;
    background-color: #f0f0f0;
}

.about-hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.about-content {
    max-width: 100%;
    margin: 0 auto;
    padding: 80px 200px;
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.about-headline {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.4;
    text-align: left;
    color: var(--text-color);
}



.about-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 60px;
    align-items: start;
    padding: 0 80px;
}

.about-portrait {
    width: 100%;
    background-color: #f0f0f0;
    border-radius: 8px;
    overflow: hidden;
}

.about-portrait-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

.about-text h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-text h2 span {
    font-size: 22px;
    font-weight: 700;
    color: #999999;
    margin-left: 8px;
}

.about-text p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-muted);
}

.about-closing {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.4;
    text-align: right;
    color: var(--text-color);
}

.about-contact {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 40px;
}

.about-contact-header {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    gap: 24px;
}

.about-contact p {
    font-size: 28px;
    font-weight: 400;
    color: var(--text-color);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: #e0e0e0;
}



@media (max-width: 1024px) {
    .gallery-container {
        padding: 180px 120px 48px;
    }
    
    .about-content {
        padding: 80px 120px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 60px;
        padding: 0;
    }

    .about-portrait {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 0 24px;
        justify-content: center;
    }
    .nav-left {
        display: none;
    }
    .nav-right {
        position: static;
        left: auto;
    }
    .mobile-menu-btn {
        display: block;
        position: absolute;
        right: 24px;
    }
    .gallery-container {
        padding: 120px 24px 24px;
    }
    .back-to-top {
        bottom: 24px;
        right: 24px;
    }
    

    /* About Page Mobile Overrides */
    .about-content {
        padding: 80px 24px;
    }
    .about-headline {
        font-size: 24px;
    }
    .about-closing {
        font-size: 24px;
    }
    .about-text h2 {
        font-size: 32px;
    }
    .about-contact-header {
        flex-direction: column;
        align-items: center;
    }
    .about-contact p {
        font-size: 22px;
    }
}

@media (max-width: 480px) {
    .gallery-container {
        grid-template-columns: 1fr;
    }
}

/* Project Detail Page */
.project-page {
    padding-top: 64px;
}

.project-hero-wrapper {
    width: 100%;
}

.project-hero {
    width: 100%;
    overflow: hidden;
}

.project-hero-img {
    width: 100%;
    height: auto;
    display: block;
}

.project-info {
    padding: 80px 200px;
}

.project-header {
    text-align: center;
    margin-bottom: 80px;
}

.project-header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.project-header .subtitle {
    font-size: 16px;
    color: var(--text-muted);
}

.project-overview {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.overview-left h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
    color: #0d2c54;
}

.overview-left p {
    font-size: 16px;
    line-height: 1.6;
    color: #0d2c54;
}

.overview-right {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.meta-item {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 16px;
    align-items: baseline;
}

.meta-item h4 {
    font-size: 18px;
    font-weight: 700;
    color: #0d2c54;
    margin-bottom: 0;
}

.meta-item p {
    font-size: 16px;
    color: #0d2c54;
}

.project-video-container {
    max-width: 100%;
    margin: 0 auto 80px;
    padding: 0 200px;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    background-color: #f0f0f0;
}

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

.project-gallery {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    margin-bottom: 120px;
    max-width: 100%;
    padding: 0 200px;
}

.project-gallery img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* Project Details Responsive */
@media (max-width: 1024px) {
    .project-info, .project-video-container, .project-gallery, .related-projects {
        padding-left: 120px;
        padding-right: 120px;
    }
}

@media (max-width: 768px) {
    .project-info, .project-video-container, .related-projects {
        padding-left: 24px;
        padding-right: 24px;
    }
    .project-gallery {
        padding-left: 0;
        padding-right: 0;
    }
    .project-overview {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .meta-item {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}

/* Related Projects & Footer */
.related-projects {
    padding: 80px 200px 40px;
    text-align: center;
}

.related-projects h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 40px;
    color: var(--text-color);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}

.related-item {
    display: block;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background-color: #f5f5f5;
}

.related-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.related-item:hover img {
    transform: scale(1.03);
}

.site-footer {
    text-align: center;
    padding: 40px 24px 60px;
    font-size: 14px;
    color: #888;
}

@media (max-width: 768px) {
    .related-projects {
        padding: 40px 24px;
    }
    .related-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

/* Password Protection Overlay */
.password-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.password-container {
    text-align: center;
    max-width: 400px;
    padding: 24px;
}

.password-container h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-color);
}

.password-container p {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 15px;
}

.password-input-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid #333;
    border-radius: 999px;
    padding: 6px;
    margin: 0 auto;
    background-color: #fff;
}

.password-input-group input {
    padding: 12px 16px 12px 20px;
    border: none;
    border-radius: 999px 0 0 999px;
    font-size: 16px;
    outline: none;
    flex: 1;
    background: transparent;
    color: var(--text-color);
}

.password-input-group input::placeholder {
    color: #999;
}

.password-input-group button {
    padding: 12px 28px;
    background-color: #d4d4d4;
    color: #fff;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.2s;
}

.password-input-group button:hover {
    background-color: #c4c4c4;
}

.password-error {
    color: #d93025 !important;
    margin-top: 12px;
    font-size: 14px !important;
    display: none;
}

@media (max-width: 480px) {
    .password-input-group {
        flex-direction: column;
        border-radius: 12px;
        padding: 12px;
        background-color: transparent;
        border: none;
        gap: 12px;
    }
    .password-input-group input {
        width: 100%;
        border: 1px solid #333;
        border-radius: 999px;
        padding: 14px 20px;
        background-color: #fff;
    }
    .password-input-group button {
        width: 100%;
        border-radius: 999px;
        padding: 14px;
    }
}