.header {
    background: rgba(26, 26, 26, 0.15); 
    backdrop-filter: blur(20px); 
    -webkit-backdrop-filter: blur(20px); 
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    height: 80px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease; 
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1); 
}

.header.scrolled {
    background: rgba(26, 26, 26, 0.25);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    width: 100%;
    position: relative;
}

.header .logo {
    width: 120px;
    height: auto;
    max-height: 70px;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(255, 68, 68, 0.3)); 
    transition: filter 0.3s ease, transform 0.3s ease;
}

.header .logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 0 15px rgba(255, 68, 68, 0.5));
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 25px;
    background: rgba(26, 26, 26, 0.2); 
    backdrop-filter: blur(15px);      
    -webkit-backdrop-filter: blur(15px);
    padding: 10px 20px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.hamburger {
    display: none;
    font-size: 30px;
    background: rgba(255, 68, 68, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 68, 68, 0.3);
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    z-index: 1100;
    padding: 8px 12px;
    transition: all 0.3s ease;
}

.hamburger:hover {
    background: rgba(255, 68, 68, 0.2);
    border-color: rgba(255, 68, 68, 0.5);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 25px;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 68, 68, 0.2), transparent);
    transition: left 0.5s ease;
}

.nav-link:hover {
    color: #ff6666;
    background: rgba(255, 68, 68, 0.1);
    transform: translateY(-2px);
}

.nav-link:hover::before {
    left: 100%;
}

.nav-greeting {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.btn-login {
    background: linear-gradient(135deg, rgba(255, 68, 68, 0.8), rgba(204, 51, 51, 0.8));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    padding: 10px 20px;
    border: 1px solid rgba(255, 68, 68, 0.3);
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(255, 68, 68, 0.2);
}

.btn-login:hover {
    background: linear-gradient(135deg, rgba(255, 68, 68, 1), rgba(204, 51, 51, 1));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 68, 68, 0.4);
    border-color: rgba(255, 68, 68, 0.6);
}

.user-menu {
    position: relative;
    display: inline-block;
}

.user-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid rgba(255, 68, 68, 0.6);
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(255, 68, 68, 0.3);
    object-fit: cover;
}

.user-avatar:hover {
    transform: scale(1.1);
    border-color: rgba(255, 68, 68, 1);
    box-shadow: 0 0 25px rgba(255, 68, 68, 0.5);
}

.menu-dialog {
    display: none;
    position: absolute;
    top: 60px;
    right: 0;
    background: #2a2a2a;
    border-radius: 8px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.5);
    padding: 10px;
    z-index: 1001;
    width: 200px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.menu-dialog.active {
    display: block;
}

.menu-item {
    padding: 10px 15px;
    color: #e0e0e0;
    text-decoration: none;
    display: block;
    border-radius: 5px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.menu-item:hover {
    background: #ff4d4d;
    color: #fff;
}



@media (max-width: 992px) {
    .header-container {
        justify-content: center;
    }

    .header .logo {
        position: static;
        transform: none;
    }

    .hamburger {
        display: block;
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
    }

    
    .header-container > .nav-menu {
        display: none;
    }

    
    nav.nav-menu {
        display: none; 
        position: fixed;
        top: 80px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 80px);
        background: rgba(14, 13, 13, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        padding: 30px 20px;
        gap: 15px;
        transition: right 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        z-index: 999;
        border-left: 1px solid rgba(255, 68, 68, 0.3);
        
        border-radius: 0;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
    }
    
    nav.nav-menu.active {
        display: flex;
        right: 0;
    }
    
    
    .nav-menu .nav-link, 
    .nav-menu .nav-greeting, 
    .nav-menu .btn-login, 
    .nav-menu .user-menu {
        width: 100%;
        text-align: left;
        padding: 0;
        margin: 0;
        background: none;
        border: none;
        box-shadow: none;
    }

    .nav-menu .nav-link, 
    .nav-menu .btn-login {
        padding: 15px 20px;
        margin-bottom: 10px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 12px;
    }
    
    
    .nav-menu .user-menu {
        order: -1;
        padding-bottom: 20px;
        margin-bottom: 10px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        text-align: center; 
    }

    .nav-menu .menu-dialog {
        display: none !important;
    }
}

@media (max-width: 480px) {
    .header .logo {
        width: 100px;
    }
    .hamburger {
        padding: 6px 10px;
        font-size: 24px;
    }
    nav.nav-menu {
        width: 100vw;
    }
}