@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500&display=swap');

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #ffffff;
    color: #111;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

body.loaded {
    opacity: 1;
    transform: translateY(0);
}

.header {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4rem;
}

.logo {
    position: absolute;
    top: 0;
    left: 0;
    padding: 2rem;
}

.logo img {
    height: 45px;
    width: auto;
    filter: brightness(0);
    transition: opacity 0.3s ease;
}

.logo img:hover {
    opacity: 0.7;
}

.nav-content {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.nav-list {
    list-style: none;
    display: flex;
    gap: 3rem;
}

.nav-list a {
    text-decoration: none;
    color: #111;
    font-weight: 400;
    letter-spacing: 0.05em;
    font-size: 0.95rem;
    position: relative;
}

.nav-list a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 0;
    height: 1px;
    background-color: #111;
    transition: width 0.3s ease;
}

.nav-list a:hover::after {
    width: 100%;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.lang-switch button {
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 400;
    color: #999;
    letter-spacing: 0.1em;
    transition: color 0.3s ease;
}

.lang-switch button:hover {
    color: #555;
}

.lang-switch button.active {
    color: #111;
}

@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
        gap: 2rem;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .logo img {
        height: 50px;
    }
}

.projects {
    padding: 6rem 4rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.projects-grid img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.4s ease, transform 0.4s ease;
}

.projects-grid img:hover {
    filter: grayscale(0%);
    transform: scale(1.02);
}

.header.scrolled .nav-content {
    pointer-events: auto;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(6px);
    padding: 1rem 2rem;
    border-radius: 2rem;
}

.project-item {
    position: relative;
    overflow: hidden;
    margin: 0;
    line-height: 0;
}

.project-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.4s ease, transform 0.4s ease;
    display: block;
}

.project-item:hover img {
    filter: grayscale(0%);
    transform: scale(1.02);
}

.caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
    padding: 1.5rem 1rem 1rem 1rem;
    transform: translateY(100%);
    transition: transform 0.4s ease;
    line-height: 1.2;
    pointer-events: none;
}

.project-item:hover .caption {
    transform: translateY(0);
}

.project-title {
    display: block;
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-transform: lowercase;
    margin-bottom: 0.2rem;
}

.project-category {
    display: block;
    font-size: 0.9rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    opacity: 0.9;
    text-transform: lowercase;
}

@media (max-width: 768px) {
    .project-title {
        font-size: 1.2rem;
    }
    
    .project-category {
        font-size: 0.8rem;
    }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}