.top-nav-search {
    flex: 1;
    max-width: 480px;
    margin: 0 30px;
    position: relative;
}

.top-nav-search form {
    display: flex;
    align-items: center;
    width: 100%;
    background: #f5f5f5;
    border-radius: 16px;
    padding: 0;
    transition: all 0.3s;
}

.top-nav-search form:focus-within {
    background: #f0f0f0;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.08);
}

.top-nav-search input {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    border-radius: 16px;
    font-size: 15px;
    color: #333;
    outline: none;
    width: 100%;
}

.top-nav-search input::placeholder {
    color: #999;
}

.top-nav-search .search-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: #999;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s;
    flex-shrink: 0;
}

.top-nav-search .search-btn:hover {
    color: #666;
}