@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;450&display=swap');

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

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;
    line-height: 1.6;
}

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

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: height 0.6s ease, padding 0.6s ease, background 0.6s ease;
    height: 90px;
    padding: 0 3rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.logo {
    display: flex;
    align-items: center;
}

.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;
    transition: color 0.3s ease;
}

.nav-list a:hover {
    color: #555;
}

.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%;
}

.nav-list a.active {
    color: #111;
    font-weight: 450;
}

.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;
    font-weight: 450;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 180px 2rem 6rem 2rem;
}

.about-hero {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.about-hero h1 {
    font-size: 3.5rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 2rem;
    color: #111;
}

.about-hero p {
    font-size: 1.25rem;
    font-weight: 350;
    color: #333;
    max-width: 600px;
    line-height: 1.6;
    }

.about-text {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.about-text p {
    font-size: 1.125rem;
    font-weight: 350;
    color: #444;
    line-height: 1.8;
    max-width: 700px;
}

@media (max-width: 768px) {
    .header {
        padding: 0 1.5rem;
        height: 80px;
    }
    
    .nav-content {
        gap: 2rem;
    }
    
    .nav-list {
        gap: 1.5rem;
    }
    
    .logo img {
        height: 35px;
    }
    
    .about-content {
        padding: 140px 1.5rem 4rem 1.5rem;
    }
    
    .about-hero h1 {
        font-size: 2.5rem;
    }
    
    .about-hero p {
        font-size: 1.125rem;
    }
    
    .about-text p {
        font-size: 1rem;
    }
}

@media (max-width: 640px) {
    .header {
        padding: 0 1rem;
    }
    
    .nav-content {
        gap: 1rem;
    }
    
    .nav-list {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .about-content {
        padding: 120px 1rem 3rem 1rem;
    }
    
    .about-hero h1 {
        font-size: 2rem;
    }
    
    .about-hero p {
        font-size: 1rem;
    }
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background-color: #111;
    transition: all 0.3s ease;
}

.hamburger.active span:first-child {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:last-child {
    transform: rotate(-45deg) translate(6px, -6px);
}


@media (max-width: 480px) {
    .header {
        padding: 0 1rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        display: flex;
        justify-content: center;
        align-items: center;
        transition: right 0.6s ease;
        z-index: 1000;
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 1rem;
    }
    
    .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 {
        gap: 0.5rem;
    }
    
.lang-switch button {
        font-size: 0.85rem;
        font-weight: 400;
        color: #999;
        letter-spacing: 0.1em;
    }
    
    .lang-switch button.active {
        color: #111;
    }
    .nav-list a::after {
        bottom: -8px;
    }
    
    .about-content {
        padding: 120px 1rem 3rem 1rem;
    }
    
    .about-hero h1 {
        font-size: 2rem;
    }
    
    .about-hero p {
        font-size: 1rem;
    }
    
    body.menu-open {
        overflow: hidden;
    }
}